Service Manual -Acer Extensa 450sg

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Maintenance Manual

Extensa tm 450 SeriesNotebook Computers

9805725-0001

November 1995


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Preface

Th is m an u al provides ins tal lat ion , operat ion a n d s ervicing da ta for th eExtensa tm 450 Series Notebook Compu ters .

Intended AudienceTh is ma n u al is pr imar ily in tend ed for u se b y qua lified s ervice techn ician sbu t conta ins informa t ion u sefu l to non- techn ica l us ers .

Conten t sTh is m an u al conta in s s ix sect ions a nd m u lt iple reference appen dicesincluding:

Sect ion 1: General Descript ion In trodu ces the m ain featu res of th en otebook; provides a list of ph ysical an d electrical sp ecifications .

Sect ion 2 : Ins ta l lat ion Describes h ow to u n pack , ins tal l opt ionsan d cable u p th e notebook comp u ter in a desk top environmen t .

Sect ion 3: Operat ing Instruct ions Describes t he notebook operat ing cont rols a n d indicators an d m odes of operat ion .

Sec t ion 4 : The ory of Operat ion Describes d etailed th eory of

operat ion for Extensa ser ies n otebooks.

Sect ion 5 : Troubles hoot ing Provides trou blesh ootin g procedu resfor the Extens a 45 0 ser ies notebooks .

Sect ion 6: Field Service Provides corrective ma inten an ceprocedur es for the notebook compu ter.

Appen dix A: Se lf Tes t Error Mes sage s

Appendix B: Conn ec tor Pinouts

Appen dix C: PC-Doc to r Referen ce Data

n Note: Addit iona l app end ices will be add ed at a fu tu re da te to docu men tn ew m emb ers of th e Exten sa produ ct fam ily.

Oth e r Manuals About th e Sys t e mTh e followin g docu m en ts p rovide a dd ition al in form at ion related to the

Extens a 4 50 ser ies :

Preface vii


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Exten sa 4 5 0 S eries Note book Com pute r Use rs Referen ce Manual ,Part No. 9803 942 -0001; conta in s reference in forma tion regard in g theExtens a 450 ser ies s oftware inclu ding th e TI cu stom u t ilit ies .

Windows 9 5 Help (online)

PC-Doctor Help and Technical Reference (online)

Orde rin g Part s and Supplie sTo order a copy of an y TI pu blication or to order opt ion k its, sp ar e pa rts orsu pp lies for you r sys tem , con ta ct you r TI Reseller or:

Teleph on e Toll-free: 1-800-TI TEXAS

vi i i Preface


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S e c t io n 1

Ge n e ral De s c ript io n

1 .1 In t roduct ionThis m an u al conta ins field an d factory level servicing inform at ion for th e TexasIns t ruments Extensa tm 450 Series of Notebook Com pu ters (Figu re 1-1).

This s ection p rovides a gen eral overview and sp ecificat ions for th e Extens a 4 50Series Notebook Compu ters.

Figure1 -1 Exten sa 4 50 Ser ies Note book Comput er

Gener al Description 1 -1


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1 .2 Product ModelsTable 1-1 summarizes the features of the product models initially available in theExten sa 450 pr odu ct lin e. Basically, th e produ ct mod els offer a ch oice of eith er10.4" Dual Scan Color or 9.4" Active Matrix Color LCDs and a choice of either theba sic Win dows 95 operating system or Windows 95 plus ap plications .

Table 1 -1 Extensa 4 5 0 Ser ies Notebook Com puters

Mo de l 4 5 0 Mode l 4 5 0 T Mo de l 4 5 5 Mode l 4 5 5 T

10.4" DS LCD 9.4" Act ive Matr ixColor

1 0 .4 " D S LCD 9 .4 " Act ive Ma t r ixColor

Win d ows 95 Win dows 95 Win d ows 95 Plu sMicros oft Works ,Quicken SE,Lotu s Organ izer,

an d MicrosoftEnter ta inmentPack

Win dows 95 Plu sMicrosoft Works,Qu icken SE,Lotu s Organ izer,

and MicrosoftEnter ta inmentPack

1 .3 International Product Versions

The Extensa 450 Series Notebooks are available in one of 15 domestic and

intern ational con figura tions as lis ted in Table 1-2.

Table 1 -2 . Notebook Dom es t ic / Int ernat ion al Con figurat ions

Co nf ig u ra t ion P/ N Su ffi x Co n figu ra t i on P/ N Su ffi x

Dom es tic -0 00 1 Swed is h -0 01 0

UK -0 00 2 Swis s/ Fren ch -0 01 1

Ger m a n -00 03 Da n ish -0 01 2

Fren ch -0 00 4 Norwegia n -0 01 3Spa n is h -0 0 05 Fin ish -001 4

S wis s/ Ger m a n -0 00 6 Belgiu m -0 01 5

Ita lia n -00 07 Au s tr ia n -0 01 6

Por tu gu ese -00 08 La tin Am erica n -0018

Wes t er n E u r op ea n -0 0 0 9

1 -2 Gen era l Description


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1 .4 Produ ct Ove rvie wAll mem bers of the Extens a 4 50 Series are h igh performa n ce notebooks powered byth e 75MHz In telDX4 p rocessor a n d Wind ows 9 5 tm Operating System software.

As a sta nd ard featur e, all members of th e Extens a 45 0 fam ily also conta in t h efollowin g fea tu res :

4MB of RAM mem ory (u ser-expa n da ble to 32 MB)

128 bytes of ba ttery-backed u p CMOS RAM

51 2 KB of video RAM

340 Million Byte Hard Drive (u ser r eplaceable)

Su pp ort for on e PCMCIA Typ e I or II opt ion (Type III if floppy d rive is rem ovedwith option)

Ergonom ic keyboard with palm rest (2.7 m m travel); bu ilt- in touch pad poin tin gdevice

Most st an dar d externa l device in terfaces in clu din g serial, par allel, PS/ 2,externa l VGA, a n d s erial infrared wireless p ort

Removab le 3 .5", 1.4 4 MB Flopp y Drive (secon d Lith ium Ion ba ttery or a type IIIPCMCIA device can be in sta lled in its place with option )

Ch oice of LCD disp lays (10 .4" Dua l Scan Color or 9.4 " Active Matr ix ColorLCD).

AC Adapter with autosensing (100 VAC to 240 VAC, 50 to 60 Hz); 34 Watts of DC ou tpu t power

10.8 Volt, 2400 mAH capacity, Nickel-Metal Hydride (NiMH) primary batterypack

Provisions for second ar y 10.8V, 14 60 m AH capa city, Lith ium -Ion Bat tery Pack (with removal of Floppy Drive)

Power m an agem ent featu res for longer p ortab le operation a way from AC power.



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Figure 1-2 Exten sa 4 50 Ser ies Fea tures



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1 . 4 . 1 Exte rnal PortsAs sh own in Figu re 1-3, th e notebook com pu ter conta ins th e following extern alpor ts :

Serial Infrared (SIR) Port for wireless connection with a similarly equippedprinter or compu ter

9-Pin Serial Port for a tta chin g an y RS-23 2 t ype serial device to th e Notebook

15-Pin E xterna l VGA Mon itor Port for at tach ing an externa l m onitor

6-Pin PS/ 2 Port to at ta ch an extern al Keyboard or Mou se

Second 6 -Pin PS/ 2 Port for a tta chin g an externa l Keyboar d/ Mous e

AC Ada pter Con n ector for at ta chin g the AC Ada pter t o th e noteb ook

Figure 1 -3 Note book External Ports



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1 . 4 . 2 Touc hpad Poin t ing DeviceAll m emb ers of th e Extens a family featu re a b u ilt-in Tou chp ad pointin g devicelocated n ear t he center of the keyboards p almrest . With l ight p resu re, the cu rsorcan qu ickly be posit ioned to th e desired p oint; a qu ick dou ble tap on th e Touch padand you have selected an object. Two select buttons (switches) are located along thefron t edge of th e noteb ook

.

1 . 4 . 3 KeyboardThe Extensa Series Keyboard is an 83/ 84-key, IBM enhanced-type keyboard withthe standard character and function keys plus 12 programmable function keys (F1through F12).

Using the Special Fun ction ( Fn ) key which ass igns mu lt iple fu nction s to keys, th ekeyboard can emu late th e IBM 101/ 102 k eyboards u sing 83 keys (84 onintern ation al m odels).

The keyboard h as a 2.77 m m str oke and featu res a sp ecial keyboard interface chipth at can detect m u ltiple levels of key in pu t (good simu lation of N-key rollover for u pto 10 keys).

Some of the major features of the keyboard include:

2.77-m m Key m ovemen t

Int egrated n u m eric keypad

Inverted T" Cu rs or Con tr ol Key layou t

Figure1-4 Extens a Touchpad



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th e Fn key with the a ppropriate keys provides curs or movemen t, pa gin g andother fu nction s in th e norma l mode.

Scroll Loc k indicator. Th is LED ligh ts t o ind icat e tha t th e keyboard is lockedin the scroll mode.

Hard Disk Drive Activ ity Indicator . Ind icates when n otebook is a ccess ing theha rd drive.

Standby Indicator. Lights when Notebook is in Standby mode.

1 . 4 . 4 St andard Powe r Feat ure sNotebook power for the Extensa 450 Series Notebook Computers is provided by anAC Adapter and a rechargeable 10.8 V, 2400 mAh Duracell nickel metal hydride(NiMH) ba ttery pa ck th at in st alls in a power bay n ear t h e fron t of th e notebook

(right side).

A secon d lith ium ion b att ery ma y optiona lly be in sta lled in th e Floppy Drive ba ywhen th e Floppy Drive is rem oved from t he Notebook.

Figure1-6 Extens a Series Cont rols and Indic ators



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All members of the Extensa 450 family feature TIs patented power managementsu bsystem (h ard ware an d s oftware) tha t pr ovides longer portable operation a ndprotection of files d u ring low bat tery conditions .

1 . 4 . 5 Wireless Connection With Serial Infrared PortThe Extensa series notebooks are equipped with a Serial Infrared (IR) port thatoffers wireless com m u n icat ion with a variety of IRDA-complian t d evices m ad e byother manufacturers .

n Note: Prior to com m u n icat in g with an extern al device equipp ed with a s erial in fra -red interface, the ap propriate third-party drivers m u st be insta lled on you r n ote-book.

1 . 4 . 6 Preloaded SoftwareAll m emb ers of th e Extens a 4 50 Notebook fam ily are p reload ed with th e Win dows95 Operating System . In a ddit ion, Extensa Models 455 an d 45 5T com e stan dar dwith th e followin g app lication pa ckages in sta lled:

Microsoft Works

Quicken SE

Lotu s Orga nizer

Microsoft En terta inm ent Pa ck No. 4

1 . 4 . 7 Notebook Expansion Capabil i t iesExpan sion capa bilit ies bu il t in to th e Extens a notebook s eries include:

User inst allab le expan sion RAM mem ory (to a m aximu m of 32 MB)

By removing the floppy drive, you can add either a second battery pack or aTyp e III PCMCIA de vice with op tion .

A Cable Connect PS/ 2 Numeric Keypad option, P/ N 2581381-0001, can beatt ach ed to eith er of th e two externa l PS/ 2 Ports.

A pa ra llel device can b e atta ched to the n otebooks extern al 25-pin p ar allel port(EPP/ ECP com pa tible).

With the port adapter installed (supplied with the notebook), the notebooksexpansion bus is adapted to provide the following external ports:

Serial RS-232 Port for at ta ch in g any ser ial device Extern al VGA Port for drivin g an extern al color m onitor

Second PS/ 2 Port for at tach ing an extern al keyboard or m ous e



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Third Party External PS/ 2 keyboard (or external mouse)

1 .5 St andard Te s t Fe aturesThe Extens a Series Notebook Compu ters u se modu lar d esign a nd bu ilt- in t est

features to reduce the mean time to repair. A power on self-test automaticallyverifies t he oper ationa l st ate of th e prima ry circu its an d a powerfu l su ite of diagnostic test s ar e availab le to fu rth er test s elected p arts of the s ystem.

1 .6 Not ebook Ass em blies andSubassembl ies

The Extens a Series Notebooks a re modu lar in design an d can be disassem bled for

ma inten an ce purp oses us ing a st an dar d set of flat-bladed, Phill ips-h ead an dh exagonal screwdrivers. Th e m ajor a ssem blies th at comp rise a typical n otebook inth e Extens a fam ily are sh own in Figu re 1-7 a n d br iefly described in th e followin gparag raphs .

Figure 1 -7 Note book Ass em blies

1 -10 Gen eral Description


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1 . 6 . 1 Cove r-Display Ass e m blyThe Cover-Display Assembly contains the LCD screen and associated high voltagepower su pp ly an d video circu itry. The Cover -Disp lay Ass emb ly conta ins th reefield-replaceable components including:

LCD As sem bly

Inverter Boar d

Slide Pot/ Converter Board

The Cover -Display Assem bly at t ach es to th e System Base Assem bly through fourtop mou nted s crews an d six m oun tin g screws on th e bottom of th e compu ter.

1 . 6 . 2 Sys tem Base AssemblyAs sh own in Figu re 1 -7, th e ma jority of th e n otebooks field replaceab le u n its (FRUs)are located in th e system b ase a ssem bly. These FRUs include:

Main Board Assembly

Hard Disk Drive Ass em bly

Mem ory Boar d Ass em bly

Up to two Du al Inlin e Mem ory Modu les Serial In fra -red Board Ass em bly

Floppy Drive Assembly

Second ary Battery Board Ass embly

Power Su pp ly Boar d Ass em bly

Batter y Pack Ass em bly

Top Cas e Ass emb ly

Touch pad Ass embly

Keyboard Assembly (removed in Figure 1-7 for clarity)

Battery Board Assembly

Gener al Description 1-11


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1 .7 Exten sa 4 50 Se ri e s No te bookSpec i f ica t ions

Specificat ions for th e Extens a 4 50 Series Notebooks ar e provided in Tab le 1-6.

Table 1 -6 Exten sa 4 50 Notebook Fea tures

S pe c ific at io ns Mo de ls 4 5 0 / 4 5 0 T Mo de ls 4 5 5 / 4 5 5 T

Memory:

Standard : 4 MB 4 MB

Maximum 3 2 MB 32 MB

Display

LCD Type: 10.4" Dual Scan Color 9 .4" Act ive Matr ixColor

Sim ultane ous LCD/ Ext.VGA

Yes Yes

Video RAM Siz e: 51 2 KB 51 2 KB

Video Bus VLBUS with GraphicsAccelerator

VLBUS with GraphicsAccelerator

Keyboard/ Pointin gDevice ,

Ergonom ic Keyboard Yes Yes

Built-In Touc hpad Yes Yes

Storage

Floppy Drive : 3 .5", 1 .44MB 3 .5", 1 .4 4MB

Hard Drive : 3 40 Million Byte 3 40 Million Byte

Interfaces

Se rial (RS2 32 ) Port Yes (Po rt Ad a p t er ) Yes (Po rt Ad a p t er )

Parallel Port(EPP/ ECP), Yes

Yes

Ext e rnal VGA Port Yes (Po rt Ad a p t er ) Yes (Po rt Ad a p t er )

External PS2 Ports Yes (2n d PS/ 2 Port onAdapter)

Yes (2n d PS/ 2 Port onAdapter)

Serial Infrared Port Yes Yes

PCMCIA Support Type I/ II (III Opt ion a l) Type I/ II (III Opt ion a l)

1 -12 Gen eral Description


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S pe c ific at io ns Mo de ls 4 5 0 / 4 5 0 T Mo de ls 4 5 5 / 4 5 5 T

Software Win d ows 95 Win d ows 95 ,p lu sapplications

Physical Characterist ics

Weight : App rox. 5.0 Poun ds(2.2 7k g) * Appr ox. 5.0 Pou nd s(2.27kg)

Dimensions : 11 .7 (L) X 1 .7 (H) X8.2 (W)

11.7 (L) X 1.7 (H) X8.2 (W)

* Wigh t sp ecification sdo n ot inclu de FloppyDrive, AC Adapter or2n d Bat tery

1 .8 Age n c y Appro valsAll Extensa 450 Series produ cts m eet the followin g stan da rds :

Underwriter s Lab (UL) Standard 1950 (safety)

Can ad ian Stan da rds Ass ociat ion (CSA) Stan dard 220 (safety)

FCC CFR 47, Par t 15 , Su bp ar t J , FCC Level B (EMI)

Canadian Department of Communications (DOC) Certification

VDE 08 71 , Clas s B (EMI)

Gener al Description 1-13


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2Insta l la t ion

2 .1 In t roduct ionThis sec t ion conta ins u npa cking an d prepa ra t ion for u se ins t ru c t ions for th eExtensa 450 Series Notebook Computers.

2 .2 Unpac king Ins t ruc t ion sThe pa ckaging diagram for th e notebook comp u ter is shown in Figu re 2-1. Unpa ck

th e comp u ter u sing the following ins tru ctions :

1 . Carefully cu t th e tape th at s eals the top f lap of th e sh ipping carton.

2 . Remove the compu ter an d th e accessor ies from th e ma in sh ipping car ton .

3 . Remove all pr otective coverings from th e comp u ter.

4 . Remove the h olding tape an d open u p th e accessory box; rem ove the conten ts .

n Note: Save the sh ipping conta in ers an d pa ckagin g for la ter reu se.

2 .3 Instal l ing Notebook OptionsIf you ha ve no options to ins tal l at t h is t ime, sk ip to Par agrap h 2 .3. Otherwise,cont inu e with Para graph 2 .2 .1 .

2 . 3 . 1 Ins talling Dual Inline Mem ory Modu le(s)

n Note : If not ins tal lin g RAM Expan sion option at th is t ime, s kip to th e next p ara -g raph .

c Caut ion : The Dual In l ine Memory Module con ta ins compon ents tha t a resens i t ive to s ta t ic e lec t r ic i ty. When handl ing the module an d the in te r-

na l par t s o f the computer, p ro tec t aga ins t s ta t ic e lec t r ic ity by u s ingwr is t o r ankle grounding s t raps and grounded w orking mats . When mov-ing or s to r ing i t ems , use the an t i -s ta t ic bags suppl ied w i th the i t ems .

Installation 2 -1


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1 . Ens u re tha t the notebook is powered off an d tha t the AC Adapter an d in tern a lbattery pack(s) is (are) removed from the notebook.

2 . Remove th e DIMM m odu le(s) from its sh ipping con ta iner.

3 . Releas e th e Keyboard by pu lling the keyboard releas e tab s forward (tab s areloca ted u nd ernea th the Ctr l an d r ight a r row keys).

4 Disen gage th e Keyboard u sing a s tra ight b lad e screwdrive an d gently lift ing upalong the front edge of th e keyboard.

5 Using th e ba ck edge of th e keyboard as a hinge, lift th e front edge of th ekeyboard u p a nd lay it aga ins t th e d isp lay.

6 . Remove th e two Ph ill ips hea d s crews h olding hea tsink to the Main Boardand remove the heatsink by l i f t ing i t upwards and out of the unit .

7. Insert the edge of the DIMM Board into the rear of either available connector(see Figu re 2 -1). Use a rockin g motion to fu lly ins ert th e m odu le. Pu shdownward s on each side of the DIMMs m odu le u nt i l it sn ap s in place.

8 . Rep lace t he hea t s ink , keyboa rd a s sembly and any o the r componen t s r emoved ins tep 1 .

This completes the expansion memory module instal lat ion procedure.

Figure 2-1 Ins talling Additio nal Mem ory

2 -2 Installation


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2 . 3 . 2 Installing PCMCIA OptionsThe Notebook h as provisions for on e Type I or Type II PCMCIA option car d.However, a type III PCMCIA device can be installed if the Floppy Drive is removedfrom the notebook and the optional PCMCIA Module is installed..

1 . Review th e in sta llat ion in str u ctions s u pp lied with th e PCMCIA option car d(s).2 . Open th e Type I/ II PCMCIA comp ar tm ent cover on th e left side of th e

notebook.

3 . To ins ert a PCMCIA card , al ign th e card with th e socket an d sl ide th e cardinto the socket until it locks into place. To install a Type III option, you mustrem ove th e Floppy Drive from th e r ight s ide of th e n otebooka nd ins tal l th ePCMCIA Option Assembly..

4 . To eject a PCMCIA card , fi rs t ens u re th at th e notebook is n ot accessing themem ory card or device. Under Wind ows 9 5, go to the Cont rol Pan el, PC Cardan d direct the car d to stop before rem oving card .

Type III PCMCIAIf Floppy Drive Removedand PCMCIA Option installed

Type 1 or Type II PCMCIAOption

Figure 2-2 Ins tallin g PCMCIA Optio ns

Installation 2 -3


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2 . 3 . 3 Ins tal l ing t he Port Adapter

n Note: Skip this pa ragraph if not ins tal lin g the Port Adap ter at th is t ime.To install the Port Adapter, refer to Figure 2-3 and use the following procedure:

1 Remove the -port adapter and any accessories from i ts shipping carton .

2 Disconnect the AC Adapter from the notebook (if attached).

3 Open th e rear connector door on th e notebook and a t tach the Por t Adapt er to thenotebook a s s hown in Figu re 2-3 .

Figure 2-3 Inst al ling the Port Adapter

2 -4 Installation


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2 . 3 . 4 Ins tal l ing t he Option al Num eric Key padAn optional nu mer ic keyboar d can be at tach ed to the n otebook via th e notebooksPS/ 2 conn ector as sh own in Figu re 2-4.

2 .4 Ins tal l ing t he Bat t e ry Pack(s )The s tan da rd con figura t ion of th e Extensa Notebook is equipped with a s ingleba ttery pack th at is ins erted from th e front r igh t s ide of the compu ter. However, if you can do with out th e Floppy Drive, you can u se th e floppy drive ba y to h ous e a

second Lithium Ion battery pack.

To remove or replace the battery pack, follow the steps below.

1. Power off th e notebook, being su re to sa ve you r d ata first .

2. Locate th e ba ttery door (r ight s ide of n otebook n ear the front ). Press th e ba tterydoor in wards an d sl ide th e door toward th e front of th e notebook; rem ove thebat tery door.

3. Inser t a new or recha rged ba t te ry pack in to the ba t te ry compa r tmen t bay. Makesu re tha t th e conta c ts a re fac ing up a nd to the rear of the compar tm ent .Check th e label (facing u p wh en ins erted) ind icat ing th e posi t ive an dnegative poles of the battery.

Figure 2-4 Ins tal l ing the Num eric Key pad opt ion

Installation 2 -5


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c Caution: There is dan ger of explosion i f the bat tery is inco rrect ly re-p laced . Replace the ba t te ry on ly wi th th e same or an equiva len t typerecommen ded by the manufac turer. Discard used ba t te r ies accord ing tothe manu fac turer s ins t ruc t ions .

2 .5 Instal l ing External DevicesMost extern al devices conn ect to the Notebook via th e conn ectors on th e rear of thenotebook an d on th e rear of th e Port Ada pter s u pplied with t he n otebook (see Figure2-5 for port as signm ents ).

2 . 5 . 1 Ins talling an Exte rnal Ke yboard/ Mou s eAs s h own in Figure 2 -6, th e n otebook h as provisions for two extern al PS/ 2compa tible devices (keyboard, m ous e, etc.) th at m ay be at ta ched to th e notebook.The pinou ts for th e 6-pin Mini-DIN conn ectors a re a lso p rovided in Figure 2-6.

Figure 2 -5 Exten sa Port Ass ignm en ts

2 -6 Installation


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To ins ta l l an extern a l keyboard or ex terna l PS/ 2 mous e on th e notebook, u se th efollowin g p rocedu re:

1. En su re tha t th e notebook is powered off.

2. Locate th e externa l PS/ 2 ports at th e rear of the notebook (see Figu re 2-6 ).

3. Attach th e PS/ 2 ca ble from your mou se a nd / or keyboard ca ble to the PS/ 2

port(s).4. Power on a ny other per iph eral devices you ma y have conn ected to the n otebook,

an d then p ower up th e notebook.

PS/2 Ports

Figure 2-6 PS/ 2 Port Ass ignm en ts/ Pinouts

Installation 2 -7


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2 . 5 . 2 Ins t alling Ext ernal Paralle l Print erThe Notebook is equipped with a bi-directional, ECC/ EPP compatible, 25-pinpa ra llel printer p ort . The conn ector pinou ts a nd conn ector location a re sh own inFigure 2-7 .

If you will be u sing a par al lel int erface, conn ect th e 25 -pin m ale conn ector of you r

printer cable to the 25 -pin fema le pa ral lel port on your notebook. Refer to themanual which accompanied your printer for instructions on configuring youroperat ing environment

2 . 5 . 3 Installing External Serial Port DeviceThe n otebook conta ins an RS-232 serial port with a ma le DB-9 conn ector as sh ownin Figu re 2-8. The s erial ports ar e us ed to in terconn ect su ch devices as :

Externa l Modem

Serial Printer

Any device tha t u ses a n RS-232 interface

To connect a pr in ter to the n otebook, ensu re tha t both th e notebook and the pr in terare tu rn ed off.

Figure 2-7 Parallel Port Loc ation / Pinou ts

2 -8 Installation


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c Caution: Neve r conne ct a paral le l device to a se r ial port or a ser ial de-v ice to a para lle l por t o r v ideo por t ; th i s may cause damage to the Note-book and/or per iphera l dev ice . If you a re un cer ta in of what typeconne c tor the ex te rna l dev ice h as , re fe r to the tech nica l manual for the

externa l dev ice .

Figure 2 -8 Serial Port Locat ion/ Pinouts

Installation 2 -9


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2 . 5 . 4 Ins talling Exte rnal VGA Mon ito rThe n otebook is capa ble of driving both its inter n al LCD display an d a n externa lVGA mon itor (LCD only, simu ltan eou s, or VGA only). The exter n al m onitorconn ector pin outs an d conn ector locations ar e shown in Figu re 2-9. To ins tal l anextern al mon itor with th e n otebook, u se th e following st eps:

1. Ens u re tha t b oth the notebook an d the extern a l monitor a re tur ned off.2. Locate the 15-pin female VGA port on the Port Adapter.

3. Attach th e ap propriate en d of th e mon itor cable to the VGA port on you rnotebook. If the mon itor cab le conn ectors h ave retaining screws, t ightenthem down .

4. If n ecessar y, conn ect the m onitor power cable to the m onitor, and p lu g themon itor power cab le into an electr ical outlet .

5. Power on th e mon itor, as well as an y other periphera l devices conn ected to th enotebook; then power u p th e notebook

2 . 5 . 5 Ins tal l ing SIR Device sThe Ser ial In fra red (IR) port offers wireless comm u n ication with a var iety of IRDA-compl ian t devices ma de by o ther ma nu fac tu rers . En su re th a t th e th i rd-par tymanufacturer supplies you with the appropriate IR drivers before at temptingconnection.

2 -10 Installation


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2 .6 In s t allin g t h e AC Po we r Adapt e rUse th e following pr ocedur es to conn ect th e AC Ada pter t o the s ystem:

c Caution: Use on ly the AC Adapter suppl ie d with th e com pute r ; othe radapters can damage the un i t .

1 . Remove the AC ada pter from th e packa ging. Connect th e roun d coaxial conn ectorsu pplied with th e notebook to the power receptacle on th e rear of th enotebook a s s hown in Figu re 2-10 .

2 . Conn ect the female s ide of the AC Power cord to the AC Adapter and conn ect thema le end t o a groun ded AC outlet .

Figure 2-9 Exte rnal Mon ito r Port Pino ut s

Installation 2-11


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2 .7 In i t i a l Sys te m Che cko utAfter you ve inst alled a ll inter n al options an d exter n al cab lin g, you re rea dy forsystem checkout and software configurat ion.

To check ou t the s ystem, set th e power switch on t h e notebook to th e On ( I ) positionwhich init iates th e notebook self test . Du ring self test execution, th e compu terchecks th e operat ion of al l key har dware including mem ory an d CPU (an d displayscopyright and version number data during test execution).

Upon s u ccessful conclus ion of self test , th e compu ter au toma tical ly loads itsoperat ing system an d Win dows environm ent. If self test fails to comp lete an d a nerror m essa ge is d isplayed, t ry powering down th e compu ter for a cou ple of minu tesan d tu rn ing power back on to repeat self test . If th e error mess age persists , seeSection 6 for t rou bleshooting inform ation.

2 .8 Con figuring the Sys te mThe first t ime you power up th e notebook, it au toma tical ly run s th e Setup Pr ogra mwhich prom pts you for cou ntr y n am e an d printer type. You exit Win dows an d th enotebook b egins u nzipping f iles a nd prepa ring the software for u se. Then it givesyou th e option of keep ing or rem oving the video.

Figure 2-10 AC Adapte r Ins tallatio n

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2 .9 Making Backu ps o f Sys te mSoftware

The Notebook is pr eloaded with Wind ows 95 operat ing system software. Prior toextended use of the notebook, create a backup set of system software using theBacku p Utili ty u n der Win dows 95. In th e event of a d isk p roblem, you can restoreyou r system u sing the Restore Util ity an d th e set of back u p d iskettes you ve ju stcrea ted .

2 . 1 0 Loadin g Applicat ion So ftwareFor as sistan ce in loading Applicat ion Software, refer to Cha pter 5 in t he Exten saSeries Notebook Comp u ter User s Reference Man u al .

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3Ope rat in g In s t ruc t ion s

3 .1 In t roduct ion

The first two su bsections des cribe th e Extensa 450 Series Notebook operat ingcont ro ls a nd ind ica tors . The rem ainder of th is sec t ion conta ins a su mm ary of computer operat ions related to notebook maintenance including how to restoresystem software.

n Note: For add it iona l operat ing ins tru ctions, s ee Extensa 450 Series Notebook Com-puter Users Guide, TI Part No.9803942-0001.

3 .2 Not e boo k Con trols an d In dicat orsThe Extens a Series Notebooks ar e equ ipped with th e following contr ols an dindicators:

Grou p of five LEDs ju st ab ove th e k eyboard (Sleep Mode, Ha rd Drive Activity,Num Lock, Caps Lock and Scroll Lock)

Power, Se tup , an d Stan dby/ Su spend bu t tons ad jacent to the s ta tu s LEDs

Single Power LED on the leftrear corner of the notebook

Touch Pad a nd two selec t but tons a t ba se of keyboard

Contra st S witch on Display Ass emb ly (Du al Scan models only)

These cont ro ls a nd indica tors a re s hown in Figu re 3-1 a nd descr ibed in grea terdetai l in th e followin g par agrap hs .

Operat ing In stru ct ions 3 -1


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3 . 2 . 1 LCD Con t ras t Con t rolThe TFT version of the n otebook con tains no operat ing controls or indicators. Th eDu al Scan version of th e display contains a cont ras t switch on th e lower r ight s ideas sh own in Figu re 3-1 .

3 . 2 . 2 But ton Swi tchesThe n otebook conta ins two butt on switches ab ove the keyboard including: Powe r On / Off Switch- Altern ate a ct ion, bu tton t ype switch t ha t controls power

to the unit .Pressing the Power button causes power to be applied to thenotebook a nd power u p s e lf tes t to be ru n . The PWR LED (left r ear corn er of notebook) glows green an d th e comp u ter th en load s Wind ows 95 . Wh en th ePower bu tton is pres sed a gain, th e Notebook powers down a nd al l da ta in RAMmem ory is lost .

Standby/ Suspen d But ton Switch- an a l terna te ac t ion touch switch th a t

invokes th e sa ve to disk featu re an d places th e un it in Sta nd by Mode (if pr eviou sly On) or On if pr eviou sly in S ta n db y Mode.

Figure 3-1 Extens a Series Cont rols and Indicato rs

3 -2 Operat ing In stru ct ions


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3 . 2 . 3 Cove r Rele ase Latc hThe Notebook cont ains one Cover Release latch . To open t h e notebook, s l ide th eRelease Mecha nism to th e r igh t a nd lift u p on th e front edge of th e notebook cover.

3 . 2 . 4 Touc h Pad Con trolsThe Extensa 450 Ser ies Notebook Compu ters a re equipped with a bu ilt - in mou sedevice called the Touchpad physically located at the bottom of the keyboard (seeFigu re 3 -1).

The cu rsor is posi t ioned b y tou ching an d dr aging you r finger in th e direct ion youwan t th e curs or to go. Th e select fu nctions a re per form ed eith er by tapping thetouch pa d or by pressing the two bu ttons (switches ) at th e bottom of th e keyboard .

You can cha nge the opera t ion of the pa d by chan ging values in th e mou se sect ion of th e Wind ows 95 Control Pan el. Once you r cu rsor is in th e proper place an d youwan t to select , us e the left bu tton to cl ick or dou ble click just as you wou ld a m ous e.

3 . 2 . 5 Keyboard Mode LEDs

The Notebook conta ins th ree keyboard m ode ind icators ju st a bove th e keyboardon t h e left s ide (n otebook cover open). Th ese LEDs includ e:

CAP (Caps Lock) Ind icator- th is LED indicates th at t h e keyboard is locked inth e Uppercase m ode. To switch to th e Lowercas e mode, pres s th e Caps Loc kkey on the k eyboard .

NUM (Num Loc k) Ind icator- This LED lights wh en you press th e Fn-F7(Nu mLk) keys to toggle on th e n u meric keypad lock fu nction. When th e LED isOn, th e embedded n u mer ic keyboard keys genera te AT-keypad chara c ters an dfu nct ions when p ressed in conjun ct ion with the Fn key.

When the NUM ind icator is Off, pres sing th e Fn key with the ap propriate k eysprovides cu rsor m ovement , pa ging an d o ther fun ct ions in the n orma l mode.

When the NUM indicator is On, the embedded numeric keypad becomes atemporary nu mer ic keypad tha t does not requi re you to press an y other k ey.

SCRL (Scroll Lock) In dicator- Th is LED lights to ind icate t ha t th e keyboard islocked in the scroll mode.

3 .3 Operating ProceduresSome of the opera t ing featu res u sefu l for notebook ma inten an ce are provided in th efollowing pa ragra ph s. For a ddit iona l opera t ing instr u ctions, r efer to th e Extensa45 0 S eries Notebook Compu ter Use rs Man ual , Texas Ins t ru ments Par t No.9803942-0001 .

3 . 3 . 1 Floppy Drive Operatin g Proc edu resTo avoid damaging the floppy drive drive, and to protect data, take the followingprecaut ions :



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Never tu rn off or res et th e n otebook wh ile th e flopp y activity indicat or is lit .

Keep th e AC ad ap ter a t leas t 6 inch es away from your drive.

Ins ert th e floppy int o the floppy drive slot with the lab el s ide u p a nd th emeta l-sh u tter en d f irst . Gently pu sh th e floppy int o the floppy drive slot un ti lth e flopp y clicks into p lace.

To remove a floppy, press th e eject bu tton u nt il the f loppy pops ou t .

Never force open th e access sh u tter on a f loppy.

Always rem ove a flopp y from th e flopp y drive before tu rn ing off th e comp u ter.

Never tra ns port t he commu ter with a floppy in th e floppy drive. Doing s o candam age the dr ive head .

If a f loppy app ears to be da ma ged, t ry to m ak e a copy of it , an d imm ediatelydiscard i t .

Keep al l floppies when not in u se in a disk s torage box to protect th em fromdamage or loss.

3 . 3 . 2 Ins t alling/ Rem ov ing PCMCIA Opt ion s

PCMCIA cards are inserted and ejected in much the same way as diskettes:

Type I or Type II PCMCIA options may be installed in the compartment on the

left side of th e noteb ook. Type III Options ma y be in st alled on th e righ t side of the notebook with the Floppy Drive removed and the PCMCIA Option installed.

To ins ert a PCMCIA card , al ign th e card with th e socket a nd sl ide th e card int othe socket until it locks into place. To install a Type III option, you mustrem ove th e Floppy Drive.

To eject a PCMCIA car d, go to th e Win dows 9 5 Con trol Pan el, select PC Ca rdan d se lec t the card to s top; then press th e re lease bu t ton an d remove thePCMCIA option .

3 . 3 . 3 Com pute r Hot Key sThe Extens a Series recognizes the followin g h ot key sequ ences:

CTRL-ALT-DEL (warm boot)

CTRL-ALT-ESC (Enter s e tup screen); to use , power u p n otebook a nd press F8at "Start ing Wind ows 95" mes sa ge. Select Comm an d Promp t Only; th en p ressCTRL-ALT-ESC.



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3 . 3 . 4 Respo nding to Low Batt ery Con dit ion sThe compu ter genera lly will notify you when you ar e rea ching a low batterycondition by the following:

Four s hor t beeps per m inu te (u nless ba t te ry warn ing i s d isabled)

The ba ttery low war n ing is a u toma tical ly disa bled when th e AC Ada pter is ins tal ledon th e notebook regardless of th e cha rge condit ion of th e batt ery pack.

If the AC ad apt er is not plu gged in with in th reeminu tes of a d etected ba ttery lowcondit ion , the notebook enters Su spend mode. When the n otebook enters Su spendMode, i t issu es one b eep,saves conten ts of RAM to disk a nd powers down th e u nit .

The Notebook retu rn s to the n orm al opera t ing mode when the power switch isact ivated. Un it th en r ecovers RAM inform ation from t he h ar d dr ive an d res toresunit to previous "On" condition.

3 . 3 . 5 Minim izin g Power Us ageThe following act ions ca n m inimize power us age an d pr otect your work d u ring thecr it ica l minu tes before you sh ut the s ys tem down or rep lace on th e ba t te ry packswith a fu lly char ged p ack:

Press CTRL-STANDBY to shut off the alarm (if its enabled)

Save RAM Disk (if using RAM Disk feature)

Press Standby/ Suspen d bu t ton to pu t t he compu te r in S t andby / su spendmode wh enever you ar e not a ct ively us in g the comp u ter. This will save al l you rwork an d rem emb er th e app licat ion a nd file you were previous ly using whenyou re turn to the On cond it ion .

Power down th e system if you do not need th e comp u ter

3 . 3 . 6 Rech arging the Batte ry Packs

A sta n dalone ba ttery char ger option is availab le to charge notebook ba ttery packs .The b attery pa cks m ay also be char ged in th e notebook as follows:

1 . Ins ta l l the ba t te ry pack in you r compu ter (if not a l ready ins ta l led).

2 . Conn ect t he AC Adap te r a s desc r ibed in Sect ion 2 .

3 . To fu l ly charge the ba t te ry pack , leave it cha rging in the Notebook for a t leas tano the r 90 minu te s .

3 . 3 . 7 Resto ring Miss ing Sys t em FilesWhen you power up th e Notebook, i t au toma tical ly checks for certain key files th atmu st b e presen t for norm al system operat ion. If an y of th ese files a re accidentlyerased a s indica ted by er ror messa ge , ins er t the Wind ows 95 Star tu p Disket te an dreboot the s ystem. This will allow you t o boot u p a nd trou bleshoot you r s ystem.



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3 . 3 . 8 Rebui ld ing t he Sys t em Sof twareIn th e event of a h ar d drive replacement or system board replacemen t whichresu lted in loss of system software, you m ay need to rebu ilt th e entire systemsoftware s t ru c ture .

The following i tems are requ ired to rebu ild t he system software:

Set of ba cku p diskettes of th e system s oftware

Operational Notebook

Ins ert th e Wind ows 9 5 St art u p Diskette in th e Notebooks f loppy drive an d p ower u pthe sys tem.

n Note:For ad dit iona l opera t ing procedu res, r efer to to th e Extensa 450 Series Note-book Compu ter Us er s Manua l , Texas Ins t ru men ts Par t No. 9803942 -0001 . .



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4Th e o ry o f Ope rat ion

4 .1 In t roduct ionThis s ect ion d escribes th e n otebook th eory of operat ion.

4 .2 Notebook Funct ional Descr ip t ionFu n ctiona lly, the n otebook comp u ter cons ists of th e following m ajor su bsystem s:

Processor and Memory Subsystem

I/ O Sub system

Video Su bsystem

Hard Disk Su bsys tem

Floppy Disk S u bsystem

PCMCIA Su bs ystem

Serial Infrared Su bsystem

Power Subsystem

A fu nctional block diagram of th e Extens a Notebook is sh own in Figu re 4-1.

4 . 2 . 1 Proc es so r/ Mem ory Subsy s t em s

The Processor fu nct ion , h oused on th e Main Board , i s implemented with a 7 5mh zInt elDX4 Process or. The pr ocess or opera tes in conjun ction with RAM an d ROMMemory on th e Memory Boar d a nd other con trol logic on th e Main Board to processsoftware instructions (BIOS, Windows 95, and Applications).

Prima ry cont rol for th e Process or/ Memory su bsystem is implemen ted with theM1429 L PC/ AT Ch ipset. Add res s b u ffering an d r eal time clock fu n ction isimp lemen ted with a n M1441 L.

The m emory subs ys tem, implemen ted on th e Memory Board a nd opt ional DualIn lin e Memory Modu les, pr ovides 4 MB (expa n da ble to 32 MB) of fas t DRAMm emor y, 128 b ytes of CMOS RAM (ba tter y back ed u p) an d 2 56 KB of Flash ROM forsystem an d video BIOS stora ge. Tab les 4-1 th rou gh 4-3 con tain t he Notebook I / Oaddr ess m ap, DMA chan nel ass ignm ents an d IRQ in ter rupt leve l ass ignmentsrespectively.

Theory 4 -1


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Figure 4-1 Note book Func t ion al Block Diagram

4 -2 Theory


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Table 4 -1 Ext en sa S eries I/ O Addres s Map

Addre s s Ran ge De vic e

00 0-0 0F DMA Con troller 1

02 0-0 21 In ter ru p t Con troller -1

02 2-0 23 M14 29 Regis ters

04 0-0 43 Tim er 1

06 0-0 6E Keyboa rd Con troller 8742 Ch ip Select

07 0-0 71 Rea l Tim e Clock a n d NMI Ma s k

08 0-0 8F DMA Pa ge Regis ter

0A0-0 A1 In ter ru p t Con troller 2

0C0-0DF DMA Con troller -2

1F0-1F7 Ha rd Dis k Select

17 8, ,1 7A 6 37 7 Regis ter s

1F0-1F7 Ha rd Dis k Select

3F6, ,3F7,

27 8-2 7F Pa ra llel Por t 3

35 F, 36F Sp ecia l I/ O Por ts

37 8,,37A Pa ra llel Por t 2

3BC-3BE Pa ra llel Por t 1

3C0-3C5

3C6-3 C9 Video DAC

3C0-3CF En h a n ced Gra ph ics Dis p la y

3D0-3 DF Color Gra ph ics Ada pter

3E0 -3E1 PCMCIA Con troller

3F0 -3F7 Flopp y Dis k Con troller

3F8-3FF Ser ia l Por t 1

Theory 4 -3


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Table 4-2 DMA Channels

Co n t ro lle r Ch an n e l Addre s s Fun c t ion

1 0 0087 Spa re

1 1 0083 Spa re

1 2 0081 Disk ette

1 3 0082 Spa re

2 4 Ca s ca de Ca s ca de

2 5 008B Spa re

2 6 0089 Spa re

2 7 008A Spa re

Table 4-3 IRQ Interrupt Levels

Pri ori ty In t e rru ptNumber

Interrupt Source

1 SMI Power m a n a gem en t u n it

2 NMI Pa rit y E rr or Det ect ed ,,I/ O Ch a n n el E rr or

3 IRQ0 In terva l Tim er,,Cou n ter 0 Ou tpu t

4 IRQ1 Keyboa rdIRQ 2 In ter ru p t fr om con tr oller 2 (ca s ca de)

5 IRQ8 Rea l Tim e Clock

6 IRQ 9 Ca s ca ded to INT 0 AH (IRQ 2 )

7 IRQ10 Res erved

8 IRQ11,Reserved9

IRQ 12,PS/ 2 Mouse

10 IRQ13 INT from Coproces s or

11 IRQ14 Ha rd Disk Con troller

12 IRQ15 Reserved

1 3 IRQ3 Ser ia l Com mPort 2

14 IRQ4 Ser ia l Com m Por t 1

15 IRQ5 Res erved

16 IRQ6 Dis ket te Con troller

17 IRQ7 Pa ra llel Por t

4 -4 Theory


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n Note: A PCMCIA card can u se IRQ 3, 4 , 5 , 7 , 9 an d 1 1 a s long as it does n otconflict with th e interru pt a ddres s of an y other d evice.

4 . 2 . 2 I/ O Subsy s te mThe I/ O su bsystem , implemen ted with a n NS87 334 VJ G Su per I / O Controller Ch ip,provides for su ch fu n ctions as int ern al Hard Drive contr ol, floppy drive control ,serial and pa ral lel ports a nd su pport for th e Serial In fra red port . The Su per I / OCont roller inclu des th e followin g feat u res : .

100 percent compa tible with ISA, EISA, an d Micro-chan nel arch itectu res

Bu ilt-in Floppy Disk Con troller

Software compa tible with th e DP8473, th e 765A an d N82077

16-byte FIFO (default disabled)

Burs t a nd Non-bur s t modes

Perpend icu lar Recording drive su pport

New high-performance internal digi tal data separator (no externalfilter comp onen ts r equired)

Low-power CMOS with enh an ced power-down m ode Automa t ic media-sense su ppor t

Two UARTS

Software compa tible with th e PC16550A an d PC164 50

MIDI compatible

Infrared support on UART2 (IrDA-compliant)

Bidirectiona l Para llel Port

En h an ced Par al le Port (EPP) compa tible

Exten ded Cap ab ilities Port (ECP) comp at ible, includ ing level 2suppor t

Bidirect iona l u nd er eith er software or ha rdwar e con trol

Compa tbile with ISA, EISA, an d Micro Cha nn el arch itectu res

Ability to multiplex FDC signals on parallel port pins for externalFDD

Theory 4 -5


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Inc ludes pro tect ion c i rcu it a ga ins t dam age caus ed when pr in ter ispowered u p, or operated at h igher voltages

In tegral IDE con troller

Provides a comp lete IDE in ter face with DMA cont rol (except foroptiona l bu ffers)

Int egra l addres s d ecoder- pr ovides select ion of all prima ry an d s econda ry ISAad dres ses including COM1-4 a nd LPT1-3.

Enh an ced Power Management Fu nct ion

Special configuration registers for power down

Enh an ced program ma ble power -down an d wake-up m odes

Au to power-down an d wake-up modes

3 special pins for power management

Typica l cur rent cons u mpt ion du r ing power -down is less th an 10A

4 . 2 . 3 Video Subsy s t emThe video su bs ystem, imp lemen ted on th e Main Board a nd on th e LCD DisplayUnit , displays text , graph ics a nd drives a n extern al VGA port . The video su bsystemis imp lemen ted with a Cirru s Logic 62 45 high perform an ce flat pa n el/ RT VGAcont roller a n d s u pp orting logic an d video RAM (51 2KB).

The m ajor feat u res of th e VGA cont roller inclu de:

High ly in tegra ted de sign (flat pa n el / CRT VGA con tr oller, RAMDAC, clock synthesizer)

Mu ltiple Bu s Arch itectu re Integrated Inter face

Local Bu s (32 -bit CPU Direct a n d VL)

EISA/ ISA (PC/ AT) 16 -b it B u s

Advanced fra me b u ffer a rch itectu re u ses availab le display memory, m aximizingint egrat ion a nd minimizing chip cou nt

Integrated programmable l inear address feature accelerates GUI performance

High performance resulting from zero wait state writes (write buffer) andminimu m wait s ta te reads (in tern a l asynchron ous FIFO des ign)

Su ppor ts pa nel resolu t ions u p to 1280 x 1024 resolu t ion inc lu ding 800x600and 1024x768

SMARTMAP int elligen t color to gray s cale con version en h an ces text legibility

Text enha ncem ent featu re imp roves white text contra st on f lat p an el displays

Fully Compatible with IBM VGA

4 -6 Theory


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4 .2 .3 .1 External VGA Drive Capabi li ty

On th e Extensa 450 , th e extern al VGA port is provided by th e port ada ptor fixtur ein th e form of a 1 5-pin, fema le, D-type conn ector which ca n be u sed to dr ive anextern al CRT (sta n dar d VGA modes with resolution s of 800 X 600 X 256 , or 640 X480 X 256 ).

4 . 2 . 4 Hard Disk Subsys te mThe Ha rd Disk Su bsystem , control led by th e IDE interface comp atible NS873 34VJ G Su per I/ O Cont roller on th e Main Boar d, p rovides disk st orage for a ll syst emsoftware a nd u ser f iles . Ini t ial ly, the 45 0 Series Notebooks a re equ ipped with a 3 40Mill ion Byte ha rd drive. However, the onb oard control ler can su pport h igh ca pa citydrives.

Dur ing the man u fac tu r ing process , Texas Ins t ru men ts forma ts the ha rd d isk andth en loads al l su pplied s oftware includ ing Wind ows 95.

c Caut ion : Format t ing the d i sk dr ive e rases an y da ta tha t m ay be s toredon the d i sk . Therefore do not a t tempt a format of the hard d i sk un lessthe com puter se l f -tes t and d iagno s t ics conf i rm tha t the d i sk has n o tbeen format ted .

A Har d Dr ive act ivity LED is located a lon g the front edge of th e n otebook. This LEDlights d u ring ha rd d river read / write access es.

c Caut ion : The notebook shou ld no t be move d w hen the HDD LED is l i t toprevent acc iden ta l damage to the hard dr ive .

4 . 2 . 5 Floppy Diske t t e Drive Subsys te mThe Floppy Diskette Drive Su bsystem consists of a Floppy Controller a nd th e FloppyDiskette Drive. The Floppy Diskett e Drive can read / wri te s tan da rd 3.5-inchminidiskettes.

4 . 2 . 6 PCMCIA SubsystemThe n otebook is equ ipped with an on-boar d PCMCIA host ad apt er (CL-PD6722PCMCIA Cont roller) an d s ockets to su pp ort on e Type I or Type II option or a Type III

option if th e Flopp y Drive is r em oved from th e u n it. Th e PCMCIA Cont roller h as th efollowing fea tu res :

Single-chip PCMCIA host adapters

Theory 4 -7


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Direct con n ection to ISA (PC AT) Bu s

Direct conn ection to PCMCIA 2.0 Bu s

PCMCIA 2.0 - a n d J EIDA 4.1 -comp lian t

82365SL-compatible register set, ExCA-compatible

Automatic Low-power Dynamic Mode for lowest power consumption

Program ma ble Su spend Mode

Five program ma ble memory wind ows p er socket

Two I/ O win dows p er s ocket

Program ma ble car d a ccess cycle t iming

8- or 16-bit CPU interface

8- or 16-bit PCMCIA interface support

ATA disk interface su pp ort

Au toma tic flas h m emory t iming su pport

Eas y host interface u sing ISA I/ O add ress es 03E 0h , 03E1 h

Mixed-voltage (3.3 V or 5V) oper at ion

Du al-socket- int erface, 208 -pin QFP

4 . 2 . 7 Power Subsy s t emTh e Power Su bsystem consists of th e following m ajor par ts:

Power Man agement (ha rdware a nd software components )

AC Ada pt er

Prima ry Battery Board

Prima ry Battery Pack

Secondary Battery Board

Secondary Battery Pack

4 . 2 . 7 . 1 Po we r Ma n ag e m e n t

The notebook is equipped with a power management function that minimizes

battery usage for prolonged battery operat ion and automatical ly recharges thebat te r ies when the n otebook i s u sed with an AC ada pter.

The power ma na gement m odes an d war nings include th e following:

4 -8 Theory


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LCD standby mode

Hard d isk s tand by mode

Sys tem s t an dby/ suspend mode

Battery-low warn in g

Stan dby/ su spend u pon ba t te ry low

4 . 2 . 7 . 2 AC Ada pt e r

The n otebook u ses a n AC ada pter with bu ilt in over voltage an d sh ort circu itprotect ion.

The ad apter can with s tan d a cont inu ous s hor t -c ircui t to DC outpu t withou tdam age to the notebook logic compon ents . The ada pter opera tes in sh u t down m ode

sh ort ing Vo trai l an d res ets to th e nor ma l power mode after the fau lt condit ion isremoved.

4 . 2 . 7 . 3 Pri m a ry Ba t t e ry Pa c k

The Extensa Series Notebooks use the Duracell DR35 as the primary battery pack.Specificat ions for th e Primary Ba ttery Pack ar e provided in Table 4-4.

Table 4 -4 Primary Bat tery Pack S pecif icat ion s

Fun c t ion Spe c ific at ion s

Ba tter y type NiMH (Nick el Meta l-Hyd ride)

Cell s tru ctu re 9 cells p er pa ck (in s er ies )

Nom in a l volta ge 10 .8 V

Cell en ergy capa city,Typical,Minimum

2400 mAH250 0 m AH,233 0 m AH,

Nom in a l r a t ed c a p a cit y 2 7 Wa t t -h o u r s

Opera t ing Tempera tu re _,

Discharge,Charge

-20 to 50 C (at 95 %RH),0 t o 45 C (at 95 %RH),

Char ge and d ischargecycles

500 (minimum),

Weigh t 47 0 gra m s

B a t te ry d is c h a rge t im e 3 h o u r s (wit h AP M)

Battery cha rge t ime

Theory 4 -9


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4 . 2 . 7 . 4 S e c o n da ry Ba t t e ry Pa c k

As a n optiona l featu re, th e Floppy Drive can be rem oved from t he n otebook a nd aLi-Ion (Lith iu m Ion) second ary b atter y pack can be ins tal led in t h e sa me cavity to

provide a ddit iona l bat tery opera t ing t ime.

4 -10 Theory


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START

COMPUTERTROUBLE

INDICATION?

DEADCOMPUTERSYMTOMS

?

RUNSELF TEST

ERRORMESSAGE

?

MODEMPROBLEM

?

RUNDIAGNOSTICS

DIAGNOSTICSERROR MSG

?

NO

YES

NO

YESSEE PARAGRAPH

5.3.5

NO

YESSEE PARAGRAPH

5.3.4

NO

SEEPARAGRAPHS

5.3.1 & 5.3.2

NO

WHEN POWER SWITCHSET TO ON,, NO

INDICATION OF POWER;SCREEN DARK, STATUS

LED's EXTINGUISHED

SET POWER SWITCHTO ON. SELFTEST

AUTOMATICALLY RUNS

YES

See Appendix D(PC Doctor)

Figure 5 -1 Troublesho otin g Flowch art

5 -2 Troubleshooting


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Try r ebooting th e s ystem (CTRL-ALT-DEL); res tore syst em from disk ettes , if necessary.

If the computer is capable of running the Setup program; check the serial andpa ral lel port configura t ions , an d other featu res th at m ay affect systemoperat ion.

Run Diagnost ics to fu rth er isolate problem a rea (See Para graph 5.3.5) .

For ind icated ha rdwar e fai lu res, cycle power an d rep eat s elf test to verify tha t aha rd fa i lu re ha s occu rred .

Remove an d replace su spect h ar dware (as described in Section 6 of th isma nu al ) an d re tes t th e sys tem u s ing the d iagnos t ic tes t s as descr ibed inpa rag raph 5 .3 .5 .

The d etai led block diagram , sh own in Figu re 5-2, is u sefu l in per form ing fau ltanalysis of various internal subsystems. For example, an LCD hardware problemcan be tra ced to eith er th e LCD, Inverter Board, VR Boar d, or Battery Board. Oth ersu bsystem problems ca n b e isolated in a s imilar fash ion u sing the detai led block diagram a s a tr oub lesh ooting tool.

5 .3 Troubleshooting ProceduresThe b u ilt- in s elf test p rogram an d th e disk resident diagnostics p rogram (PC-Doctor)ar e u sefu l tools in comp u ter t rou bleshooting. However, if th e compu ter h as a p ower,keyboard or display problem, you first solve th is problem before ru n n in gdiagnostics. If th e comp u ter powers u p an d displays mess ages on th e LCD or emitsa s eries of beeps, sk ip to Paragra ph 5.4.3 for fu rth er ins tru ctions.

5 . 3 . 1 Troubleshooting a Power Supply Problem

If th e compu ter does n ot power u p when th e Power Switch is s et to the ON posit ion,you most likely ha ve a ma lfu nction in th e power su bsystem (loss of power a t th e ACOutlet, faulty AC Adapter, discharged Battery Packs, or faulty Power Supply Board).With a p ower pr oblem, a ll LEDs a re extingu ish ed, th e LCD screen is blan k, th esys tem does n ot respond when the s tan dby switch s evera l t imes cons ecut ive ly andno dr ive act ivity can be h eard . The comp u ter is u na ble to load s oftware an ddisp lays n o visible signs of activity.

To fau lt isolate a power p roblem, ch eck t h e followin g:

AC Adap ter an d Bat tery- Plu g in th e AC ada pter a nd dou ble ch eck al lconnect ions on th e Adapter a nd compu ter. Ensu re tha t the Notebook Powerswitch i s se t to the On pos it ion an d th a t th e sys tem is n ot in S tan dby or s leepmode.

Measu re th e voltage at th e AC Ou tlet or plu g in a k nown good ap plian ce (EG. alamp ) to verify tha t volta ge is p res en t. If th e volta ge is O.K., try replacing th e

AC Adapter

Check to see th at th e batter y pack is ins tal led correct ly (try us ing a r echa rgedba ttery pa ck if ba t teryis discha rged).

Troubleshooting 5 -3


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If the AC outlet voltage, AC Adap ter, an d ba ttery packs test n orma l but thecompu ter will not power u p, replace the Power Su pply Board a n d/ or Batt eryBoard a s des cribed in Section 6.

5 . 3 . 2 Troubleshooting a Display Problem

If the LCD remains b lank when you tu rn on the compu ter, and the s ta tu s indica torslight, ch eck th e followin g contr ols on th e disp lay (See Figu re 3 -1):

Figure5 -2 Troubles ho ot ing Block Diagram



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LCD sta nd by mode - If th e LCD back light rem ains off, even with th e Contra stControl set to i ts h ighest p osi t ion, the LCD ma y be in Stan dby Mode . Press th eStandby or Power bu t ton to power u p the sys tem.

Notebook S et for Externa l Monitor- us e CMOS Setu p to r eset n otebook.

LCD - Replace the cover-display assembly as described in Section 6 of thism a n u a l .

Low battery - Use a fully charged battery.

5 . 3 . 3 Fault Iso lat ion Usin g Selfte stWhen the compu ter is firs t powered u p, i t au toma tical ly perform s a self- test of itscentra l ha rdwar e an d m emory fu nctions. Du ring self- test (which las ts for a fewseconds), the display shows copyright and version number information.

n Note: Some procedures in th i s pa ragraph require you to us e keys t roke se-quences , such a s Ctrl-Alt-Del . To execu te a keystroke sequen ce su ch a sth is , you m u st p ress a ll th ree keys s imu ltan eou s ly.

5 .3 .3 .1 Se l f Tes t Erro r Mess ages

Upon s u ccessful comp letion of the self- test , th e compu ter a u toma tical ly loads itsoperating system and other built-in utilities. If the self-test fails to completesu ccessfu lly, the display sh ows one of the error m essa ges d escribed in Appen dix A.

5 . 3 . 4 PCMCIA Mo de m Pro blem sIf an optiona l PCMCIA m odem does n ot work pr operly, check th e followin g item s:

Proper installation of any PCMCIA options (check Modem settings underCont rol Pan el).

Dialing problem or wrong nu mb er - Try dial ing a n u mb er th at you h avepreviously dialed successfully.

Fau lty phon e line - Conn ect a teleph one to th e line a nd lis ten for a dial ton e.

Software program - Check to ensu re tha t you ha ve ins tal led th e softwarecorrectly.



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5 . 3 . 5 Fault Iso lat ion Usin g Diagnos t ic s

PC-Doctor su pplied with the E xtensa 450 Series Notebooks is a powerfu ldiagnostics tool th at ca n h elp you sca n a n inter na l RAM system for viru ses,deter mine th e ha rdwar e configura t ion of a local or rem ote system , bench ma rk i ts

per forma nce , an a lyze the per forma nce of a l l su bsys tems, a nd per form a s u ite of int eract ive an d n on-interact ive tests on a t tach ed devices. The test r esu lts a re storedin a log which can be pr int ed ou t (by press in g F2) or sa ved in a disk f ile (by press ingF3).

Featu res of th e diagnostic progra m a re accessed t hr ough a series of pu ll-downmen u s an d ba sic keyboard keys (cu rsor keys to move highlighted point er, Enter k eyto select a h ighlighted featu re, ESC key to cancel a fu nction a nd move back onelevel.

PC-Doctor is typically us er fr iendly bu t i f you dont u nd ersta nd a featu re,context-sens it ive h elp inform ation is availab le a t a n y t ime by pr essing th e F1fu nction key; pres sing the F1 fu nction key twice accesses th e online Techn icalReferen ce Man u al for PC-Doctor.

A powerful set of u tilities with in PC-Doctor (th at can be ru n loca lly or rem otely)simplify the tas k of determ ining system configu ra t ion da ta, a llocating an d u singsystem mem ory, IRQ an d DMA u se, wha t device drivers a re insta lled, wha t COMan d LPT ports a re a ss igned a nd wha t ports ar e availab le, iden tifyin g part i t ioningdata for fixed disk drive(s), determining the VGA setup information, reading thesoftware interru pts / int erru pt vectors, etc.

Fu n ctiona lly, PC-Doctor includ es th e followin g:

Group of nine n on-Int eract ive diagnost ic tests th at perform a n on-destr u ctivetest of th e ma jor ha rdwar e fu nctions in th e notebook (Processor, Memory,System b oard, video sect ion, s erial an d pa ra llel ports (when loopba ck ad ap tersar e ins tal led), ha rd d isk an d f loppy disk .

Group of seven Inter act ive tests (requ ire opera tor inpu t) for test ing th ekeyboard, video sect ions, s oun d su bsystem , mou se, joyst ick, diskette drive,printer subsystem and SCSI/ CD-ROM Drive subsystems.

Util ity tha t provides d etai led system inform ation su ch a s configura t ion da ta,

al location an d u se of system mem ory, IRQ an d DMA u se, wha t device driversare ins ta lled , what COM and LPT por ts a r e ass igned an d wha t por ts a reavailab le, par titionin g da ta for fixed d isk d rive(s), VGA set u p in form at ion ,software in ter ru pts an d in ter ru pt vec tors .

Group of sp ecial pu rpose u t i lit ies to ru n other t ests from PC-Doctor, perform aviru s sca n of th e intern al RAM system, ed it configura t ion files , s u rface s canha rd d r ives , meas ur e sys tem p erforman ce , open a DOS prompt , providesterminal access to devices connected to serial ports , supports memory debugoperat ions, en ables remote operat ions, perm its deep disch ar ge of notebook ba tteries an d pr ovides a n exten sive test report ing fu nction.

The PC-Doctor diagnostic program conta ins a grou p of nine n on-Interact ivediagnostics, available from th e Diagnos t ics head ing in t h e ma in menu , t ha tperm its test ing various ha rdwar e sect ions with out opera tor inp u t . You ca n s electone, several, or al l tests from th e Diagnostics men u . Thes e tests a renon-destructive; the serial and paral lel port tests require disconnecting external



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devices from you r n otebook a nd ins tal ling loopba ck p lu gs. The Non-Int eract ive testcategories includ e:

CPU and Co-Processor Tests

Base RAM memory test

System Board tes t

Video Test

Com1 a nd LPT1 s erial port test s

Par allel Port Test

Fixed Disk test

Diskette Drive tests

Other devices (Sound card, PCMCIA options, etc.)

Interact ive Tests

The PC-Doctor diagnostic test includ es a su ite of seven Int eract ive tests th at r equireopera tor inpu t du r ing the cou rse of the tes t . The Interact ive Tests categoryinc ludes :

Keyboard - tests th e keyboar d keys, LEDs an d repea t fu nction

Video - tests th e LCD an d extern al VGA cha ra cter sets , a nd colors.

Speake r - tests th e volu me res pons e at different frequen cies.

Mouse - tes t s the m ouse dr iver, bu t tons an d fun ct ional ity

Joys t i ck - cal ibra tes th e externa l joyst ick connected t o the systeman d tes ts t he joys t ick bu t tons

Diskette Drive - checks diskette dr ive fu nctiona lity

Maximum Sys te m Load - thorou ghly exercises s ystem to th ema ximu m extent p oss ib le for per forming sys tem bu rn - in an d tes t

Printer Test - tests th e operat ion of a conn ected printer

SCSI Tes t - send s test codes to at ta ched SCSI devices (requ ires u seof a Dockin g System with SCSI)

CD-ROM Te s t - checks out an y at ta ched CD-ROM Drive (requ iresat ta chm ent of a Docking S ystem with CD-ROM cap ability)



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Support ing Onl ine doc um en ta t ion

The PC-Doctor Diagnostic contains the following online information sources:

Online Techn ical Man u al- selected at an y t ime b y pressing F1 k ey twice or byclicking on th e Qu estion Mark in the u pper left h an d corn er of an y PC-DoctorMenu

On-line Help system th at provides context s ens it ive informa tion from everyPC-Doctor s creen- a ccessed b y press ing F1 key once (press ing F1 twice getsyou in to th e online m an u al )

5 . 3 . 5 . 1 Us e r In t e rfa c e t o PC-Do c t o r

PC-Doctor is s tru ctu red a s a text-mode, wind owed u ser inter face with pu ll-downmen u s. Program operat ion requ ires t he u se of th e following keys:

Cu rsor Keys- move the h ighlighted poin ter ENTER Key- Selects th e h igh lighted option

ESC Key- Cancels curr ent fun ction an d goes ba ck one step

F1 Key- Activates the context-sensitive help feature (pressing F1 twice in a rowcalls u p th e on line Techn ical Reference Man u al for PC-Doctor)

Scrolling wind ows, wh ich sh ow the r esu lts of various operat ions, u se t he followingkeys:

Page Up/ Page Down- moves the s creen on e page at a t ime

F2- Prints the log to PRN

F3- s aves t h e log to a file

You can also u se th e m ous e or Point to int eract with PC-Doctor. The leftm ost Se lec tkey is u sed t o choose objects (men u entr ies a nd act ion codes typical ly enclosed inbra ckets). Th e r ight most Se lec t key is equ ivalent to th e ESC k ey which ta kes youba ck to your p revious step.

5 .3 .5 .2 Crea t ing a Bootable F loppy Diske t t e

Prior to u sing PC-Doctor, crea te a boota ble flopp y diskette u sing th e followin gprocedure :

1 . Power u p the u n it ; when un it displays mes sa ge, "Sta rt ing Win dows 95", pres sF8. Choose Comm an d Prompt Only from m enu .

2 . Using DOS, form at a floppy diskette.

3 . From the A: prom pt, copy the ba sic MS-DOS files to th e diskette u sing thefollowin g comm an d:

Format A: / F:1440 / S



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Wher e th e value 1 440 is t he capa city of th e diskette (1.44 MB in th is exam ple).

4 . Get into th e PC-Doctor directory ( type CD C:\ PCDR and p re s s Ente r )

5. Copy th e PC-Doctor files to th e bootab le disket te u sin g the followin gcommand :

XCOPY C:. A:.

After comp letion of this procedu re, you sh ould h ave a b ootab le diskette cont ainingPC-Doctor.

5 . 3 . 5 . 3 Ru n ni ng PC-Do c t o r

PC-Doctor is a DOS-resident pr ogram tha t can be ru n from eith er ha rd d isk or fromth e bootable diskette you previous ly created.

1 . F rom the C :\ p rompt change d ir ectory (t ype CD C:\ PCDR ) an d press Ente r

2 . The Diagnostics Program loads into system mem ory, an d th e LCD displays th ediagnostics Header.

n Note: There a re a nu mb er of comm an d- line s witches th a t can be en teredwhen s tar t ing up PC-Doctor to ena ble au toma tic viru s sca nn in g, ena bleloopba ck tes ting of serial/ pa ra llel ports, work from th e rem ote men u if per-form ing rem ote operations , etc. To get a listin g of th e availab le comm an d-line switches, startup PC-Doctor with the following command:

PCDR / ? and press Ente r .

n Note: If PC-Doctor detects a viru s, i t will stop with an error m ess age. Youmu st th en u se one of the s ta nd ard v iru s de tec t ion an d removal program s toremove the viru s.

5 . 3 . 5 . 4 Qu it t i ng PC-Do c t o r

To exit PC-Doctor, Select t h e Quit pu ll down m enu an d then s e lec t the Quit to DOSoption.

n Note: For add it iona l inform ation , pres s F1 twice to access the onl ine Refer-ence manual for PC-Doctor.



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6Fie ld S e rvic e

6 .1 In t roduct ion

This sect ion cont ains p revent ive an d correct ive ma int ena nce pr ocedur es for theExtens a 45 0 Series Notebook Compu ters. The first par t of th e sect ion descr ibes th ecomputer cleaning procedures and preferred handling procedures for sensi t ivecompon ents (e.g. d isk drives, b at ter ies).

The s econd p ar t of th e sect ion iden tifies a ll field r eplaceable parts ; the r ema ind er of

th e sect ion conta ins removal an d replacemen t procedu res for th e field replaceab lepa r t s .

6 .2 Prevent ive MaintenancePreventive ma int ena nce is l imited to clean ing th e plast ic case, th e keyboard, a ndthe display screen.

6 . 2 . 1 Cleaning the Com puterWhen it is n ecessar y to clean th e plast ic cas e an d keyboard, u se a s oft , lin t-freecloth, s l ightly da mp ened with a m ild detergent s olu t ion or us e the conten ts of an ycomm ercial ly availab le com pu ter clean ing kit .

c Caution: Neve r use alcohol , petroleum -base d solvents , or harsh dete r-gents to c lean your compu ter. Also neve r spray any l iqu ids d i rec t ly onthe co mpu ter case , keyboa rd, or screen . I f the l iquid-crystal display

(LCD) scree n has be come sme ared or dusty, c lean the sc reen by fi rs t ap-plying a m ild glass clean er to a sof t , c lean , l int-free cloth, and ge nt lyw ipe the g lass . Never apply l iqu ids d i rec t ly on the sc reen su r face .

c Caut ion : Do not use paper towe ls to c lean the d i sp lay sc reen . Paper canscra tch the d i sp lay sc reen mat te .

Field Service 6 -1


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6 . 2 . 2 Protect ing the Disk DrivesTo protect th e disk drives an d da ta, ba ck u p th e system disk p eriodically on f loppydiskettes. Periodical ly us e a hea d-clean ing diskette in th e floppy diskette d rive toprolon g the l ife of th e drive an d to h elp m ainta in dat a int egrity.

6 . 2 . 3 Handling the Com pute r Batte ry PackThe ba t te ry pack fu rn ish ed with th e comp ut er requires reasona ble care an dha nd ling to en su re efficient operat ion a nd ma ximu m life. Periodical ly in spect t heba ttery term ina ls a nd th e batt eries for evidence of corrosion a nd oxide bu ild-u p;clean if necess ary.

To ens u re th at th e batter y pa ck end u res a n orm al life cycle, always observe thefollowing precau tion s when ha nd ling th e battery pa ck:

Do not drop th e batt ery pack or su bject i t to excess ive shock a nd vibra t ion.

Do not expose the ba ttery pack to direct su nlight , moistu re, or chem icalcompounds .

Do not d isas semble the ba t te ry pack .

Do not u se th e bat tery pack to power other d evices.

Do not sh ort the b atter y leads or connect th e batt ery with r eversed p olari ty.

Never a t temp t to char ge the ba t te ry pack in a ny way other th an as descr ibed inth i s man u a l.

Always cha rge the ba ttery pack a s soon a s poss ible after a low bat teryindicat ion.

6 . 2 . 4 Rest oring Sys te m Sof twareThe h ar d dr ive on th e notebook compu ter is factory loaded with Windows 95 a ndread y for operat ion. Su pplied with th e Win dows 95 system is a faci lity for creat ingba cku p diskettes of th e system s oftware. In the event of a d isk cra sh or otherproblem, you can us e the Wind ows 95 S tar tu p d iske t te to boot the u ni t and

perform troubleshooting.

6 .3 Require d Too ls and Equipm e ntAll notebook computer correct ive maintenance procedures can be performed usingth e followin g tools: Tweezers

Small flat-blade screwdriver

Sm all Phillips scr ewdriver

Hexagonal Screwdriver

Plastic Stick

6 -2 Field Service


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c Caution: All boards, opt ions and pe ripherals con tain comp one nts thatare sen si t ive to s tat ic e lectr ic i ty. When han dling any of the se i tem s, pro-tec t aga ins t s ta t ic e lec t r ic i ty by us ing w r is t o r ankle grounding s t rapsand grounde d w orking mats . When moving or s to r ing i t ems , use the an t i -

s ta t ic bags suppl ied w i th the i t ems .

6 .4 Notebook Field-Replaceable Partsand Ass e m bl ie s

All mem bers of th e Extensa 450 Series Notebook Comp u ters conta in t wo ma joras sem blies including th e Cover Display Ass embly (u pper ha lf of notebook comp u ter)an d t he System Base Ass embly (lower h alf of th e n otebook). Ea ch of th ese twoassemblies contain FRUs as described in the fol lowing subparagraphs.

6 . 4 . 1 Cove r-Display Ass em blyAs s hown in Figure 6 -1, th e Cover -Disp lay Ass embly cont ains th e LCD screen ,Power Inverter Board, an d Con verter Boar d. ,The DSSTN models also inclu de a SlidePot Board (not u sed with th e TFT models).

The Field Repla ceab le Un its (FRUs) with in th e Cover Display Ass emb ly ar e pr ovidedin Table 6-1.

n Note: FRU level part n u mb ers a re n ot available at t ime of pu blicat ion of this m an -u al . For required p ar t n u mb ers, r eference th e Field Ser vice Bullet in s (FSBs) for th eExtens a 450 Ser ies or contac t Texas Ins t ru men ts b y d ia l ing 1 -80 0 -TI TEXAS .

Bezel (Removedfor Clarity)

Power InverterBoard

Slide Pot/ConverterBoard

LCD Cover

Figure 6-1 Cove r Display Ass em bly FRUs

Field Service 6 -3


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Table 6-1 Cover Display Assembly, Field Replaceable Units (FRUs)

FRU De sc ript io n Re fe re nc eParagraphNo .

FRU De s cript io n Re fe re nc eParagraphNo .

Inverter Board, DSSTN10.4"

6 .5 .9 LCD Cover, DS STN10.4", 450

6.5 .9

In ve rt er B oa r d , TF T 9 .4 " 6 .5 .9 LCD C ove r, TF T 9 .4 ",450T

6.5 .9

Display Assembly, 10.4"DSSTN 45 0

6 .5 .8 Bezel, DS STN 1 0.4 ",450

6.5 .9

Display Assembly, 9.4"TFT 450 T

6 .5 .8 Bezel, DS STN 1 0.4 ",455

6.5 .9

Slide Pot Boa rd , DSSTN10.4"

6 .5 .9 Bezel, TFT 9 .4", 4 50 T 6 .5 .9

Converter Board, TFT9.4"

6 .5 .9 Bezel, TFT 9 .4", 45 5T 6 .5 .9

6 . 4 . 2 Sys te m Base Ass em blyAs sh own in Figu re 6-2, th e System Ba se Assem bly hou ses a var iety of fie ld- replaceable sub ass embl ies a nd componen ts . The FRUs a nd para graph

references for rem oval/ replacemen t p rocedu res ar e l is ted in Table 6-2. Table 6-3conta in s a lis t ing of Cu stom er (non -techn ical u ser) replaceab le u nits (CRUs) andas sociated TI Part Num bers .

n Note: FRU level part n u mb ers a re n ot available at t ime of pu blicat ion of this m an -u al . For required p ar t n u mb ers, r eference th e Field Ser vice Bullet in s (FSBs) for th eExtens a 450 Ser ies or contac t Texas Ins t ru men ts b y d ia l ing 1 -80 0 -TI TEXAS .

Figure 6-2 Base Ass em bly FRUs

6 -4 Field Service


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Table 6-2 Base Assembly, Field Replaceable Units (FRUs)

FRU De sc ript io n Re fe re nc eParagraphNo .

FRU De s cript io n Re fe re nc eParagraphNo

Ma in Boa rd As s em bly 6 .5 .1 6 Tou ch Pa d As s em bly 6 .5 .11

Mem ory Boa rd As sem bly 6 .5 .1 5 Hea t S in k As sem bly 6 .5 .6

Ser ia l IR Boa rd As sem bly 6 .5 .12 HDD Ca b le 6 .5 .4

Prima ry Battery Boar dAssembly

6 .5 .1 3 FDD Ca b le 6 .5 .4

Second ary Bat te ryBoard Ass emb ly

6 .5 .1 7 HDD Cover Ass em bly 6 .5 .4

Power Su pply BoardAssembly

6 .5 .1 4 HDD Hold er As sem bly 6 .5 .4

F lop p y D rive As s e m b ly 6 . 5 .3 Low er C a s e As s e m b ly Re f

Hard Disk Drive, 340Million Byte, 12 .5m m

6 .5 .4 Up per Ca se As sem b ly 6 .5 .1 0

Keyboa rd As sem bly 6 .5 .5

Table 6-3 Notebook CRUs (Customer Replaceable Units)

CRU De sc ript ion TI Part No . Re fe re nc eParagraphNo .

In ter n a l Ba t tery Pa ck , Ni-MH 98 03 92 8-000 1 6 .5 .1

Ba t tery Pa ck , Li-ION (Op tion ) 9803 929-000 1 6 .5 .3

4MB RAM Mod u le 9803932-000 1 6 .5 .7

8MB RAM Mod u le 9803950-000 1 6 .5 .7

16 B RAM Modu le 980393 3-000 1 6 .5 .7

Exter n a l Ba t tery Ch a rger 98 03 93 4-000 1 Ref.

Por t Expa n der (Tra velBu d ) 98 03 935-0 00 1 Sec. 2

Fu ll Fu n ct ion Por t Rep lica tor 98 03 93 6-0001 Ref.

PCMCIA Option 980393 0-0 00 1 Sec. 2

Field Service 6 -5


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6 .5 Note book Subasse m bly Rem ovaland Replacement Procedures

The followin g par agra ph s con ta in field s ervice-level rem oval/ rep lacem en tprocedu res for th e Notebook.

c Caut ion : Pr ior to removing any of the in te rna l FRUs in the n o tebook, re -move the AC Adapte r, bat tery, floppy an d hard d r ives an d al l exte rnal op-t ions ins ta l led on the no tebook.

6 . 5 . 1 Remo ving/ Replac ing t he Note book Bat te ryPack

The procedu re for r emoving a nd replacing th e ba ttery pa ck(s) is a s follows:

1 . Tu r n off t h e com p u ter.

2 . Locate th e ba ttery door (righ t side of n otebook n ear th e fron t) (see Figu re 6-3 ).Press th e batter y door inwa rds a nd sl ide the door toward th e front of th en otebook; rem ove th e ba ttery door.

3 . Grasp the r ibbon loop on the ba t te ry an d pu ll the ba t te ry out of thecompar tment . .

4 . Wh en replacing th e ba ttery, ins ert the end opposite the r ibbon loop with th e

bat te ry notches poin t ing up wards . S l ide th e ba t te ry in to th e compa r tmen tand replace the battery door.

Figure 6-3 Rem oving Bat te ry and Disk Drives

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6 . 5 . 2 Removing/ Replacing PCMCIA OptionsThe pr ocedu re for r emovin g an d r eplacing th e PCMCIA options is as follows:

1 . Tu r n off t h e com p u t er.

2. Rem ove th e PCMCIA de vice(s).

3 . To rep lace th e PCMCIA Device, open th e cover door an d inser t th e device.Reins tal l any extern al cab ling r equired for th e device.

6 . 5 . 3 Rem ovin g/ Replacin g th e Floppy DriveTo remove and replace the Floppy Drive, perform the following procedure:

1 . Remove th e bat tery as described in Para graph 6.5.1 ab ove.

2 . Tu rn the notebook over so tha t the bot tom is fac ing u p and the floppy dr ive is onth e r ight s ide. Lay the n otebook on a pa dded, f lat work su rface.

3 . Locate the Floppy Release But ton near the center of the notebook (Figu re 6-3).

c Caution: When remov ing th e Flop py Drive Assembly, grasp i t by i tss ides ; o therwise damage to the f loppy dr ive can occur.

4 . Pus h th e Floppy Release Bu tton toward th e front of th e notebook an d

simu ltaneou sly pu ll ou tward s on th e floppy drive by placing your t hu mbover the ribbed outer edge of the floppy drive assembly. When the floppydrive is released, gras p th e ass emb ly by th e two sides an d rem ove theas sem bly from th e notebook.

5 . Th e Floppy Drive Ass embly can be fu rth er disas sem bled by removing th ePhillips-h ead scr ews from th e sides of th e flopp y drive as sem bly; lifting off the cover and lifting out the floppy drive and cable connector (ZIF Connectortype). Unplu g the ca ble at th e ZIF Conn ector .

n Note: When reassembling the floppy drive, its easier to install the shield on thefloppy drive before installing the drive into the plastic housing.

6 . 5 . 4 Removing/ Replacing the Hard DriveThe procedu re for r emoving a nd replacing th e Har d Drive a ss embly is a s follows:

1 . Power down the no tebook , r emove the ba t t e ry packs , and d isconn ect t he ACAda pter, if in sta lled.

2 . Disconnect an y per iph era l device in ter face cables from the extern a l in ter faceconn ectors a n d r emove an y ins tal led PCMCIA options .

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3 . Tu r n the compu te r ove r so t ha t t he Hard Dr ive pane l is on your r igh t s ide (SeeFigu re 6-3). Press down on th e c ircular bu mp with your th u mb to re lease th eha rd drive cover; remove the cover a nd lay as ide for later reinsta llat ion.

4 . Usin g fin ger pres su re, s l ide the meta l cover downward s toward th e edge of thenotebook; then lift u pward s t o remove the m etal cover.

5 . Ins er t a smal l b lade s t ra ight s lo t screwdr iver in to the recess in the p las t ics an dgently lift th e fron tm ost ed ge of th e dr ive out of th e ba y.

6 . Lay the hard dr ive on it s back .Then u s ing a sma ll s t ra ight s lo t screw dr iver, gent lypry on each en d of th e conn ector on th e Disk Drive an d rock it ba ck an dforth u nt il the conn ector is r emoved from t he d rive as sem bly.

7 . Replacem ent is essen tial ly the reverse of s teps 1 th rou gh 6.

6 . 5 . 5 Rem oving/ Replacin g th e Key board Ass em blyThe p rocedu re for r emoving a nd replacing th e keyboard as sem bly is a s follows:

1 . Tu r n o ff t he compu te r and d isconn ect t he ac power adap te r (if it is a t t ached ).

2 . The top edge of the keyboard is he ld in p lace by p las t ic tabs beneath th e CTRLan d Righ t Arrow Keys. Pu ll the ta bs toward th e front of th e n otebook (tab ssn ap in to a n 1 / 8 inch recess in the p las t ics ).

3 . Us ing a sma ll s t ra ight -b lade screwdr iver, lift the front edge of the keyboardupwards .

4 . Lift the front edge of the keyboard s light ly an d gent ly pu ll the keyboard towardsth e front of th e notebook exposing two cables tha t conn ect the keyboard to

the ma in b oa rd .5 . Release the two ZIF (zero ins er t ion force ) conn ectors us ing a p las t ic s t ick or other

non meta ll ic object an d rem ove the cab les from th e ma in board con nectors

6. Remove the k eyboard as sem bly from th e notebook.

7. When insta llin g the replacem ent k eyboard , essen tially reverse th e aboveprocedures .

6 . 5 . 6 Rem oving/ Replac ing t he Heat S inkTo remove and replace the h eat s ink , perform th e following pr ocedu re:

1 . Remove the keyboard ass embly as descr ibed in para graph 6 .5 .5 .

2 . Remove the two Ph illip s -head sc rews tha t s ecu re t he hea t s ink to t he ma in boa rd(note th at one of th e screws is located n ear t he HDD conn ector).

3 . Lift upwards on the hea t s ink and r emove it from the base .

4 . Rep lacemen t is t he r eve r se o f s t eps 1 t h rough 3 above .

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6 . 5 . 7 Rem ovin g/ Replacin g Dual Inl ine Mem oryModules (DIMMS)

To remove and replace the expa ns ion m emory, us e the following procedu re:

1 . Loosen the keyboa rd a s sembly (bu t do no t d is conn ect keyboa rd cab le s ) a sdescr ibed in s teps 1 th rough 5 of Paragraph 6 .5 .5).

2 . Remove the Heats ink a s d escr ibed in Para graph 6 .5 .6 .

3 . Us ing the back edge of the keyboard as a h inge, lift the front edge of the keyboardu p an d lay it against th e LCD assem bly.

4 . Push the two me ta l sp r ings away from the boa rd edge and r emove the DIMMSboard .

5 . When ins ta l ling a DIMMS board , ins er t the edge of the board in to the rear of it sconn ector us in g a s light rocking motion a t an an gle to the su rface of th eboard .

6. Once th e DIMM is fu l ly in serted in th e conn ector, pu sh downward s on both sidesof th e board t o sna p i t in p lace.

Figure 6-4 Rem oving/ Replacing Expans ion RAM

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6 . 5 . 8 Rem ovin g and Replac ing th e Cove r-DisplayAssembly

To remove the cover-display assembly, perform the following procedure:

1 . Remove the keyboard an d hea ts ink as descr ibed in para graph s 6 .5 .5 an d 6 .5 .6respectively.

2 . Remove th e cab le cover below th e display by lifting u pwar ds on th e fron t edge of th e cover.

4 . Unplug the video cable th at ma tes with th e Main Board.

5 . With the main video cable out of the way, two sm al ler cables a re vis ib le. Unplu gthe r ightmost cable.

6 . Using a plastic stic k, slide the right and left hinge c overs a wa y from the ba seassembly.

7 . Lay the display completely ba ck an d rem ove the four s crews tha t secu re th

Service Manual -Acer Extensa 450sg

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