d) PIONEER’ The Art of Entertainment

Service

STEREO CASSETTE DECK

CTr-s CT-S420 CT-S520 AND CT-S420 HAVE THE FOLLOWING:

Type | Model Power Requirement Remarks CT-S520 CT-S420

*Change the connection of the power transformer’s primary wiring.

® This manual is applicable to the following: CT-S520/HEM and HB; CT-S420/HEM

and HB.

® The models and their types in this manual indicate the following:

CT-S520; CT-S520/HEM and HB types.

CT-S420; CT-S420/HEM and HB types.

HEM type; CT-S520/HEM and CT-S420/HEM.

HB type; CT-S520/HB and CT-S420/HB.

CONTENTS 1. SAFETY INFORMATION -++-:-ssseseseccceesecsceeeereeneee 2 7. PCB PARTS LIST ns<sccesteciecicsncessncccess westereorenvas 22

2. PACKING AND PARTS LIST cev:eeccesseesssseceseceoseeees 3 8B. ADJUSTMENTS -:--:cccccscsscstescsssssceccnssaseeeeconeenss 25

3. EXPLODED VIEWS AND PARTS LIST ------seeeeeeees 4 9, IC INFORMATION --ceeesesscccesssceceeseeeeececeeeeeeeeeees 29 4. BLOCK DIAGRAM --+ss--eeeseccccescesccesceesessterseseeees 10 10. FL INFORMATION -+------sesssescecseessseceeeceeeeseenenas 31

5. PCB CONNECTION DIAGRAM.---+-cceecesessceeteeveees 1 11. PANEL FACILITIES ----+---0sseescesssssseeceeeecuseeeeeee ens 32

6. SCHEMATIC DIAGRAM. +<ececceeeseeeeeeesscerreeetereeees 19 12. SPECIFICATIONS cocceccecceesestsceccccececeneeceeeseeeeess 33

PIONEER ELECTRONIC CORPORATION = 4-1, Meguro 1-Chome, Meguro-ku, Tokyo 153, Japan PIONEER ELECTRONICS SERVICE INC. P.O. Box 1760, Long Beach, California 90801 U.S.A. PIONEER ELECTRONICS OF CANADA, INC. 300 Alistate Parkway Markham, Ontario LR OP2 Canada

PIONEER ELECTRONIC [EUROPE] N.V. Haven 1087 Keetberglaan 1, 9120 Meisele, Belgium

PIONEER ELECTRONICS AUSTRALIA PTY. LTD. 178-184 Boundary Road, Braeside, Victoria 3195, Australia TEL: [03] 580-9911

© PIONEER ELECTRONIC CORPORATION 1993 SF MAR. 1993 Printed in Japan

CT-S520, CT-S420

1. SAFETY INFORMATION

This service manual is intended for qualified service technicians; it is not meant for the casual do-it-yourselfer. Qualified technicians have the necessary test equipment and tools, and have been trained to properly and safely repair complex products such as those covered by this manual. improperly performed repairs can adversely affect the safety and reliability of the product and may void the warranty. If you are not qualified to perform the repair of this product properly and safely, you should not risk trying to do so and refer the repair to a qualified service technician.

WARNING

Lead in solder used in this product is listed by the California Health and Welfare agency as a known reproductive toxicant which

may cause birth defects or other reproductive harm (California Health & Safety Code, Section 25249.5).

When servicing or handling circuit boards and other components which contain lead in solder, avoid unprotected skin contact with

the solder. Also, when soldering do not inhale any smoke or fumes produced.

NOTICE

(FOR CANADIAN MODEL ONLY)

Fuse symbols -§£— (fast operating fuse) and/or -§£—® (slow operating fuse) on PCB indicate that replacement parts must be of identical designation.

REMARQUE

(POUR MODELE CANADIEN SEULEMENT)

Les symboles de fusible -—§E— (fusible de type rapide) et/ou ~§E— (fusible de type lent) sur CCI indiquent que les

piéces de remplacement doivent avoir la méme désignation.

(FOR USA MODEL ONLY)

1.SAFETY PRECAUTIONS

The following check should be performed for the

continued protection of the customer and service

technician.

LEAKAGE CURRENT CHECK

Measure leakage current to a known earth ground

(water pipe, conduit, etc.) by connecting a leakage

current tester such as Simpson Model 229-2 or

equivalent between the earth ground and all exposed

metal parts of the appliance (input/output terminals,

screwheads, metal overlays, control shaft, etc.). Plug

the AC line cord of the appliance directly into a 120V

AC 60Hz outlet and turn the AC power switch on. Any

current measured must not exceed 0.5mA.

Reading should Leakage | "ot be above

current | 0.5mA tester

Test all exposed metal

Surfaces

83 ©) Also test with

plug reversed

{Using AC adapter plug as required)

Earth ground

AC Leakage Test

ANY MEASUREMENTS NOT WITHIN THE LIMITS

OUFLINED ABOVE ARE INDICATIVE OF A PO- TENTIAL SHOCK HAZARD AND MUST BE COR- RECTED BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER.

2.PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the appli-

ance have special safety related characteristics. These

are often not evident from visual inspection nor the

protection afforded by them necessarily can be ob-

tained by using replacement components rated for vol-

tage, wattage, etc. Replacement parts which have

these special safety characteristics are identified in

this Service Manual.

Electrical components having such features are

identified by marking witha A on the schematics and

on the parts list in this Service Manual.

The use of a substitute replacement component which

dose not have the same safety characteristics as the

PIONEER recommended replacement one, shown in

the parts list in this Service Manual,. may create shock,

fire, or other hazards.

Product Safety is continuously under review and

new instructions are issued from time to time. For

the latest information, always consult the current

PIONEER Service Manual. A subscription to, or ad-

ditional copies of, PIONEER Service Manual may be

obtained at a nominal charge from PIONEER.

CT-S520, CT-S420

2. PACKING AND PARTS LIST

NOTES: ¢ Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

© The A\ mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure

to use parts of identical designation.

Parts marked by “@” are not always kept in stock. Their delivery time may be Jonger than usual or they may be unavailable.

Parts List

Mark No. Description Part No.

1 Pad (L) RHAI1111 101 2 Pad (R) RHA1112 3 Packing case RHG145200

(For CT-S520/HEM) i \ 3 Packing case RHG1459 | 10 |! me

(For CT-$520//HB) | BF 4 ee | 3 Packing case RHG1453 oie ft Op

(For CT-S420/HEM) fo wes | is | 3 Packing case RHG1460 a eal ee

(For CT-S420/HB) 4 Sheet RHX — 034 6 12 5 Connection cord RDE - 010 9 5

(For AUDIO)

6 Control cord RDE1030

(For CD * DECK SYNCHRO) 7 Operating instructions RRD1135

(German /Italian/Dutch/ 14 Swedish//Spanish / Portuguese) (HEM type only)

8 Operating instructions RRE1076 (English “French)

9 Remote control unit RPX1066 (CT-S520 only)

10 Battery cover RZN1007

(CT-S520 only)

11 Spacer A RHC1044 12 Cord with mini plug PDE — 319

(For SR cord) (CT-S420 only) 13 13 Pad spacer A RHC1039

(HB type only) 14 Pad spacer B RHC1041

(HB type only) a

NSP 101 Battery (R6P,AA) | VEM-O13 o NS (CT-S520 only) -

1 WN

CT-S520, CT-S420

3. EXPLODED VIEWS AND PARTS LIST 3.1 EXTERIOR

NOTES:

¢ Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

* The 4, mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure to use parts of identical designation.

* Parts marked by “@” are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.

Parts List

Mark No. Description Part No. Mark No. Description Part No.

a 1 Strain relief CM — 22B 36 Bonnet REA1077 A 2 AC power cord RDG1026 37 Front panel (For CT-S520) RAH2234

(For HEM type) 387 Front panel (For CT-S420) RAH2235 A 2 AC power cord RDG1024 38 Screw ABZ30PO080FMC

(For HB type) 39 Screw BBZ26PO60FMC A 3 FU801, FU803 Fuse REK — 100 40 Screw BBZ30PO60FZK

(TI1AL250V) Name plate RAM1007 41 Screw BBZ30PO80FMC

A 5 Power transformer (T1) RTT1221 42 Screw BMZ26P040FMC 43 Screw IPZ20PO80FMC

6 Cord clamper RNH — 184 44 Screw IBZ30P150FCU 7 Ratchet spring RBH1008 45 Pulley gear (CT-S520 only) RNK1517

(CT-S520 only) 8 Half pressure spring RBK1004 46 Joint (CT-S520 only) RNK1895 9 Main unit (For CT-S520) RWZ2885 47 Cam gear (CT-S520 only) RNK1896 9 Main unit (For CT-S420) RWZ2877 48 Binder REC — 371

10 DISP unit (For CT-S520) RWZ2887 49 Lead card 33P RDD1284 10 DISP unit (For CT-S420) RW2Z2879 50 Connector assembly 2P RKP1384

11 s«1/ unit RWX1086 51 SW lever (CT-S520 only) §RNK1897 © 12 HX unit RWX1069 52 Loading base assembly RXA1548

13 Insulator PNW1912 (CT-S520 only) 14. Lens $ PNW1893 53 Eject knob (CT-S420 only) RAC1772 15 LED lens PNW2019 54 Door spring L (CT-S$420 only)RBH1341

55 Damper assembly REC1005 16 VR knob RAC1707 (CT-S420 only) 17 Power knob RAC1809 18 Operation knob RAC1I795 56 Screw (CT-S420 only) BCZ26PO50FMC 19 Balance knob RAC1705 57 Pin cap (HB type only) VECI1616 20 Mode knob A (For CT-S520) RAC1798 58 Screw (CT-S420 only) IBZ26PO80FMC 20 Mode knob A (For CT-S420) RAC1800 59 Eject spring (CT-S420 only) RBH1342

60 Washer (CT-S420 only) WA52D080D025

21 Slide knob RAC1713 NSP 101 OPSW unit RW2Z2888 22 Mode knob B RAC1808 NSP 102 TRN 2 unit RW2Z2890 23 Door lens (For CT-S520) RAH2265 NSP 103 MECS unit (CT-S520 only) RW2Z2891 23 Door lens (For CT-S420) RAH2171 NSP 104. MECM unit (CT-S520 only) RWZ2892 24 Stabilizer panel RAH1483 NSP 105 TRN 1 PCB RNZ2390

© 25 Mechanism unit RYM1203

(For CT-S520) NSP 106 Mechanism bracket RNE1601 © 25 Mechanism unit RYM1204 NSP 107 Rear panel (For CT-S520) RNAI1681

(For CT-S420) NSP 107 Rear panel (For CT-S420) RNA1682 NSP 108 PCB spacer PNY — 404

26 Screw (CT-S520 only) PBA — 125 NSP 109 Trans shield plate RNE1451 27 ~=Stabilizer B REB1085 NSP 110 Main chassis RNB1090 28 Remain display paper REE — 113 29 Door pocket (For CI-S520) RAH2243 NSP 111 Connector assembly 4P RKP1111 29 Door pocket (For CT-S420) RAH2230 NSP 112 Connector assembly 4P RKP1112 30 Door side panel R RAH2261 NSP 113 Arm Collar (CT-S420 only) RLA1124

(CT-S520 only) NSP 114 Eject arm (CT-S420 only) RNE1597

31 Door side panel L RAH2262 (CT-S520 only)

32 Rubber belt (CT-S520 only) PEB1127

33 Motor pulley (CT-S520 only) PNW1634 34 FL lens (For CT-S$520) RAH2239

34 FL lens (For CT-S420) RAH2291 35 DC motor (CT-S520 only) PXM1010

pee ost 1 2 I 3 I 4 I CT-$520, CT-S420 Exterior

CT-S520 only

‘ A

3 B

C C

Y a

a 27 ; \ : “>I 5 24 5

CT-S420 4 > : Q y ; ay

~s

- “>

fs ‘BRD . = eros F : 3 ‘

|

0 D NOTE: Screws adjacent to V mark on the product

are used for disassembly.

| CT-$520, CT-S420 f

3.2 MECHANISM UNIT (RYM1203 and RYM1204)

A RYM1204 only

This screw No. 44 is the part to hold the cam

gear for servicing, when the hook holding the

cam gear No. 24 is broken.

C 6

RYM1204 only

D D

ro) ql of

”

- S)

oO rot in

“” _ ©

BLOCK DIAGRAM 4.

on \ 49

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ait

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=

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(1s60) us r

€)

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10

Parts List

Mark No. Description

Fixed core

Planger

Head (R/P) Head (E) Push SW

MTR reel BLK MTR main BLK

Solenoid BLK Photo — transistor

Main belt

Pinch roller ass’y F/W ass’y Washer

Pan 26X64 ZN Washer

Reel base BLK

Idler BLK

Washer

Azimuth SP

Head base SP

Slide SP Play arm

Cam gear (3R)

Lever SP (L) (EJECT)

Eject prevention

spring (L) Spring (CASSETTE) Lever collar B

Detector lever (REC)

Metal detector lever (L) Detector lever (P)

Screw

Plate HD BLK

Screw

F lock screw

Screw (7.7)

Screw

Washer

Washer

Holder cushion (L) F lock screw

Screw PCB control BLK

Part No.

RLA1130 RLA1132 RPB1047 RPB1040 RSG1018

RXM1057 RXM1058 RXP1010 SPI33534FG REB1163

RXA1183 RXA1346 WA26D045D025 RBA1076 RBF — 057

RXA1184 RXA1248

RBF1038 RBH1076

RBL1003 RBH1239 RNK1525 RNK1672

RBH1262 (RYM1204 only) RBH1234

(RYM1204 only) RBK1048 RLA1146

(RYM1204 only)

RNK1527

RNK1529

RNK1543

(RYM1204 only)

RBA1101 RXA1488

PMA26P050F MC

RBA1031

RBA1048

(RYM1204 only) RBA1078

(RYM1204 only) WA26D047D050

YE15FUC RED1027 RBA1102

RBA1068 RXA1556 (RYM1203 only) RXA1487 (RYM1204 only)

Description

Chassis base BLK

Head base Head spacer

CT-S520, CT-S42¢

Part No.

RXA1557

RNE1390

RNK1836 Eject prevention arm (L) RNE1199

Lever (L) (EJECT)

Screw

(RYM1204 only)

RNK1593

(RYM1204 only)

PMZ20P080F MC

st | tr i of i

5. PCB CONNECTION DIAGRAM

@ View from soldering side

st |

| | | | | | | | I 4 Oe eel

CHK-1482X @az ¥

sath ee eae ee fe 3{] 2) Steal : 3S La fe So SRS V4

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14

MAIN UNIT(RWZ2877 | CT-S420)(RWZ2885:.CT-S520)

MECHANISM TO ares ares Qssee Sie DOLBY DECODER £8 Ev. PB AM a

CRvMi008 9 AdI.R Aah

17f UNIT RNP1503-A UN IT(173) ofits ee aS) > : oes ey feat ee

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og é 5 Bl sce vnte | pags oe LE Oe ; [esi Ou { ) aR iH | AN ce | | Q403 oe ER lok

‘ p 4 Q172 VRI1 ReO4] nua pieg 5 92 2 5 ree ve : a Ny J Leh QV ; Tae asscan ¢

Al) C OE a I5( )= | PL es Q283 ee oe 2 gk , PR, £ FUME Og I Reh . jezc1 19! oise 1C251 Raed

CHOC pes i Sod é, 610 ie W188 fay foe eee ce eo i

sie nents we | Q351 : i _ | |

pane % Soe oe J Q352 Q151 é cen

1 : PB LEV Bras © IC33 seve es Add. ‘El FRAP oor an Q476 A aes

ices tee ae = ( Q501 @401 Q555 ae

1C501 Q463 . {c401 . : HX UNIT PNP1448-A cs bes “Oe : Q502 Q402 soos 1

Miler 5 BIAS Loi Bo oe cer We 3 ine ag scti _vreee| o8 — | BUS =

B Line Voltage Selection sada — [4] o ans =

Line voltage can be changed with the following steps. VR552,

|. Disconnect the AC power cord. |

2. Remove the Top cover E | 38

3. Change the positron of the AC He poner cord as follows. @ss fe702 1C551 ee ae

| Voltage Terminal ‘No. at TRN | UNIT Q468 ae

Silucemreeae a Ene iraatl

| 220) 20) jie @55i1 Q461 |VR551 c ho = (C801 Q557

— 230V-2409 J13 1C802

a i Q640 4. Stick the line voltage label on the rear panel. Q762

ae 0482 Parts No | Description Q481 Q623

es Q643 Q76i AAX-193 | 220 V label Q641

iS a 7 : @622 AAX-192 | 240 V label

. TRN2@ UNIT C Q908

y a Q927 TRN 1 UNIT 1

(C 2) a9o6 OO Q771 Q738

TRNI - [C703

tp hey tate ous 53

ere orra Gfe> 1] {C541

A aa

io S yaaa ra

AC POWER CORD et

BLU 2 1C701

arw | oz 5 —-$-$@) mi

ne paw 6 oes: 9822 1C543 220-230/ La — | —B@) G8 a 1C803 es Oss TRANSFORMER Ss. fF 8

Le Sa amar

: e D Vaio ele | VV : J\\ 8 1C805 Gass

ee ee MAIN [RWZ2885[ RWZ

RNP1504-A

193

42

MECHANISM | _ UNIT (3/3)

P.C.B. pattern diagram| Corresponding part i P indication symbol ‘art name

a aN

| | | | | | | | | L

eae

ea oe a 2 [2] Transistor

LN S a 5)

vcr

Dee ey a 8 ah fey

* 1. CT-S520 ONLY.

=

* 2. CT-S420 ONLY. = ee

OPSW UNIT(RWZ2888) oo oO fag Zenner diode

it OPSW Vomm® XS@ri-HD oro IR WZ PBRBRI

ey LED b s¢4 on R1i4g5 +

2 3 2 vale oS ae = ) 8 = ) cate _RNZ2389_ Varactor ip eS pop ‘et : :

p << 0 tf Oz Os = De i oo -

14 STOP a [Ole fe [Ole . of] Tact switch ih $1421 ‘ size : 1405. ip ae os : cb : a | uy ‘ ie

D14at ——— : i oe REC MUTE Inductor

: : : : 91407 : : 1/F REC PAUSE. Bite af = $1485 siado :

: o. a Coil

age C=) o1aes C=

MONITOR | |e SYNC BLE $1489 $i4i8 ae

Transformer

Filter

Ceramic capacitor

Mylar capacitor

| Styrol capacitor

— Electrolytic capacitor

(Non polarized) [eee cee7 yeos

BIAS

CN14 :

Electrolytic capacitor

(Noiseless)

Wi5a1 Electrolytic capacitor 4EMORY,,

| (Polarized)

va — 5 | Electrolytic capacitor = » | (Polarized) Sas HT 5 4 [= . SES ti ¥

«1 Ossea Power gpl a earthen Pn ee S| ONLY | capacitor | eee] F — eee oe ad aks ms T a ee ‘ W1586 Semi-fixed resistor exelare) a i : : Wi507 Ese O-—VVV 0 Panis {TED O cell. " wisoo

too a8 = : : oe ay A eo eho 9 4 d x Resistor array es ee 51501 ren | Koes 1 be D0. OFF lees : 071 a “wisi s fo}

Pah (dee

“AH o— KA -——o Resistor

4Qb o—{[]/-—0 Resonator

lw) Thermistor

. This P.C.B. connection diagram is viewed from the parts mounted side

The parts which have been mounted on the board can be replaced with

those shown with the corresponding wiring symbols fisted in the apove Table

3. The capacitor terminal marked with Cl) shows negative terminal The diode marked with © shows cathode side The transistor terminal marked with (0) shows emitter

MECS UNIT 0 ice

MECM oy f XS@v1-AHO «

- 8

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: PB AMP a aa ee er 1/f UNIT

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1 BER nate 2 21 MECHANISM ey ; fio ty UNIT (173) sr 88 é OOF} | B35 UNEP AZ) Ad a Teal| fe

| P.8 HEAD 5? Amid | (RPB10474) as & | = Bowe -7.248v 28 rr ra\ Cay aoe

Pe DB: ea Y SLE (¢201 “1s , CXA1330S x

| AS 5 gp [DOLBY B/C_NR] 232 Mo

1 2s ele | a8 TOOT TT aT

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ane 2% S {isle G cig} PT Ho

| 1¢101 (272) a. To | eee eee ete M5220P vf) ' t = vee : H a 1S218N 4.

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9 0 $s i Bie |e (RON1 624) ey R559 22K b Blo R265 MUTE

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1C551 as : Pte tg noose

Lit | set ie

F202 i IND RTFIZ00R om! | 256 SS joe

| 410161 (272) p 0022 R264

BA1S218N eo { S60 Voltage t ; 3885 vee (RCN1 024)

{Vv} : Loe ee eo 6270 t 1 0.07

: R283 [mex On -4.2V Gua REC

: ISEQ CONTROL} 2 woee [1K IMEX OFF: av MUTE

Satta ok ae. A ee: beg aes 1 a 2k

Bi vg? ae ee q i aos i «2 (6161 (1.72) \ 25K 246-V/0R é BA15216N | "

ae!

: ' ave Test yl —— a3 7 iT, BLE_TEST__ 2 -

TONE FILTER wa sie

= one C403 . oe i oy hee Re aos VOT? oan ag GOSkHz OSC] OP biasi : 1 BIAS FREQ.| OSC . . . -

oe ! Rags vaso? 400H2 3 AOS. ig jvci2 eee 34 nett tanta

l * mg Ir r ; 335 : i 3 Sadak i ae 0. it} | q Bi ICN6O1A © ¢ 1

10941 ae (C161 (272) , TG407 11 8 ai ® (TAT288P) 1 BAIS218N BA15218 BSS | 1G) 26

1 r3k3 @

: 1 Re? - aw

a INPUT BUFFA} ‘ eae ® ee

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A oso 7 15R35S—100A1

BIAS ADJ

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Reas

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21 0 ‘ac O 220-2300 NA BIAS CONT se ‘power «=A as ees

3 4. en : ; | ! a: TE8%s-vooam INCE Wes

, ; | TRN 1 UNIT 7 ‘cor HEM Tye, (RWZ2889) 4

slo Mano eee bees eae ee | | an POWER SUPPLY 1 :) : 1 ar

6 0 | ACZ3O~240V SO/EOHZ | 1 ese 7

1 BLU A neuTRAL adit Tee ‘ : | BS = i 7 0 : Oo ; i root VREL 2

° , 7 8 0 ; LIVE J13 iFusor, | | 8 : OS ali © pacar eT ; Fuaos: | = 9 9 ‘CORD L 1 TIAL 250V' Ii

RDG 1024) TRNT UNIT” fo | (RWZ 2889) | : + | ‘For H@ Type ; i : | of 4 i al bee e--- -- - ee - eee eH de ee 33 4 s tot

i “2 ie i ;

| 0810. 811. 912. 813 | | 1835-1 00AVL, 33

| $ |

A A pe 1 SR3S-100AVL RFAI/ 44.2200 | Pee f

! Tac2 og LH. aoa : cae Jr | So VFL i

A, pransronwer —TRN 2 UNIT Sialiaere oe ie RTTI221 (RWZ 2890) ACI ae ©) i ' LOZ20F b, 2.2K ans ‘

®SIGNAL ROUTE te “PLAYBACK SIGNAL +0810~0813 1SR35-100AVL

iF) _: PLAYBACK SIGNAL(FLEX) Hey ---—- RECORDING SIGNAL

:

CT-S$520,

YA3S1 (174) JA3S1 (274) RKB-020 RKB-020 2

Se et ed te A ea er eee eee gee Oe ot oe a = a ete 5s 7 OUT=R

Dif fe A ) (9) Sep 7 7 ‘ 7 7 ae

aa ie ee ‘ RU=S0KO 1 ~ 101999172) : R357 rs

BA1S216N 1780 n

0951 ‘ a ese 2802144S-UV vi] eae 1c941 VREL = VC12 pa

TA7288P

7 0952 ' 25021 445-U/V ves ns 4 _

Yeso714as-uv Fe i R352 R358 1750

3.3K Kk cas2

47172) (C953 (272) BA15218N

BA15218N =X (C1911 (272) oF

as

VEG

TAPE/SOURCEY WF [CS41 (474) BA10339 7

(c541 (174) BA10339 GNDA }

DO® ol! 1D O66] —-—-—-—-—

D@QOQO) OOQOO@|N"4_. - Lt BA10339

vesv Arcsss (274) . VEG : ; Pee E GNOA GNDA 3 a =! a8 om

iS See et Ni

Bes 1C541 (3/4) wez i

| BA10339 a as

BY '

@ i

a R579 {7 ‘ wy sof) REC MUTE ia

agv| 28021445 Lssi =4

jsov| NDA Suattn mr

B 22K R561 Pi c wo 3 Se) LL S88 bon Bo |

os — RS72 RST3 ROTA RS75 RST PEt BLE DATA z> ' ” CONVERSION See. a

See ' TYPE2 4 Pevo: a '

RS92 R593 Roo TYPES 1¢702 Leva = '

Tox [fen] [2004 G scx LC7S70 veve A/0_ CONVERTER Z ' P GL GH to fQ 'M 6 | SKPACIND Lev3 METER LEVEL pa

care MECHANISM |, L ar it w Rig ».- YNIT(273) nea $ $ ey eta aca Epes :

ary (ary (ar) z we TAPE SELECT Mego i

ey S | ET kes MEQ2 1 seieaa tikes t2a- (|

=. ma 5 ‘SELA MEQ3 i

csge, me bx Py ry ur —_ NRSS B1A0 [ wor] _| = = i) Ne ie ae aia :

cro T T z= eno ——4 soe FSEO ‘ MET Sea OE naa EERE | Fs02 FSe1 ;

+ ' NOR /CrO2/MET Ea Eli a Er eee cece ' im a GH | SEQ1 ey: 1 _ SELECT SW iy) ey] — KEY BUFFER

}— - LREC t oe Pray , ou 3 ;

H f

GNOC f ‘

2 : SS aN 1¢703 ' ee vee RIGS d (cy) NM93C46N

Pos 4 Pos ee Bona HS P02 POTS SA Pos? en :

Pot PO7 iN

DS el= pos SR 1 3 er: ae nh REMOCON ,

a 1 2 : E| HH “ Be NO orc ivaat 8k Wort, & sv3l dey ee | am heel d scvsisuanei VLOAD R6OS 5 (J) 3 9 33 Lear [5 ‘ a= I

< ey { eso fos { FRCD 9 Cl Pe = er le ee 4 REO1 In |S C613 R705 22K

a) 22k S (RMPA) MC1 H gut aE Re |) = ae ew a No = ' stay CD SYNCHRO i Balad stat : F} DOLBY HX ‘ cos ate ui PRO iy 18; Goa bn AA) <

3 Ic601 p—w—_ 19) Be { Fd UPC1297CA : (RTT T STO 3 I i pa um Gos

x i mee) 4sck GO3

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ps be Sts xt ' oe com *1:CT-S520 ONLY ago—el? 7s] 3 [eee oa Fer, * 2:CT-S420 ONLY : g (7) P| alt= 9 n A osc FRM CO 1 NOTE: e oLsiss «i 1 (400. 3K. 15K) Est x-

3B) So i wave) M2 me F 3) 1¢ S 4 vo Unspecified Diodes,

iS z : GNO | 1 Transistors and

baie A aae SbaK i Switches as follows.

' fel

u H \ 7551018 j . ' cs yt GNI

Sear sae Se i SYSTEM | ee i -) 28C3311A-R/S

t 1

-{ } 2SA1309A-R/S MAIN UNIT

‘ 1 (RWZ 2877 : CT- S420) (RWZ 2885 : CT-S520) OTC124ES

'

HLEM33S—1 (ite eee a ee ER ee eRe eae L&E) ora ases ‘OPSW UNIT (RWZ 2888) | j SEL6410G

01409

CN1501 1401 0) orc124Ts _—_oe _— LPLY

HLEM33R-1

VER 1 POWER EVECT

8) DTA124TS

PLAY OFF RES

FF ¥ 7 sisos Bee 3 ++ 188254 S06 i RSH104) KI :

oO D 1 01507 43 i 53 FB $1401~81411 ray a 3 $1505~S1508

M RSG1030 5 > $ | v1501 RAW1121 boa : wae, Srdgietene

oso: RSG1034

' poorer eee ee 1 vesy: Pos t

f F xt i 01508 | 4 : VC5SV : HC-112 ' R1701 t

1 ' ' i

| ‘ - ey \ | si701 SEL6C10R i

i | 01701 t ; a1 702 i

\

| 1¢1501 } $00: “er aicay 1701 —— ' SNS DISP. UNIT !

; I ' (RWZ 2879 :CT-S420) i UME Sean ew A RE ES ROSY, Fare gn Bot Oy ce ha A A PS EE eee _(RWZ 2887: CT-S520) i

24

; | ‘ | : | :

CT-S520, CT-S420

7. PCB PARTS LIST

NOTES: * Parts marked by “NSP” are generally unavailable because they are not in our Master Spare Parts List.

¢ The /i\ mark found on some component parts indicates the importance of the safety factor of the part. Therefore, when replacing, be sure

to use parts of identical designation.

« Parts marked by “@” are not always kept in stock. Their delivery time may be longer than usual or they may be unavailable.

* When ordering resistors, first convert resistance values into code form as shown in the following examples.

Ex.1 When there are 2 effective digits (any digit apart from 0), such as 560 ohm and 47k ohm (tolerance is shown by J=5%, and

K=10%). 560 Q > 56X10 SOL veer e reece etter treet terete RD1/8PM (5][6][1]J

yj 0 ne Vi eee 1 RD1/4PS (4](7][]J

O5Q ORS crrrree eset terete tenet ee enn n eee er eens: RN2H (0][R][5]K

1Q me) oe RSI1P(O][1][O]K

Ex.2 When there are 3 effective digits (such as in high precision metal film resistors).

5.62k Q—>562 X 101 S621 cre eter erect eee tte tees RN1/4PC[5][6][2|[1]F

Mark No. Description Part No Mark No. Description

LIST OF ASSEMBLIES Q621, 0622 Q640, Q831, 0832, 9835, Q908, Q921

+ CT-S520 NSP MOTHER UNIT R¥M1602 Q905-Q907

MAIN UNIT RWZ2885 Q163-Q166, Q181, Q182, Q351, Q352,

© HX UNIT R¥X1069 Q551, 0552, Q557, Q558, Q623, Q951,

1/f UNIT RWX1086 Q952

DISP UNIT RYZ2887 Q403

NSP OPS UNIT R¥Z2888 Q168, Q170, Q172, Q772, Q834

NSP TRN 2 UNIT RWZ2890 Q101, Q102, Q151, Q152, Q167, Q169,

NSP MECS UNIT R¥Z2891 Q171, 9283, Q401, Q402, 0461-0476

NSP MECM UNIT R¥Z2892 Q481, 0482, Q501, 0502, Q521, Q522, Q553-Q555, Q735-Q738, Q761, Q762,

- CT-S420 Q833, 9851, Q942

NSP MOTHER UNIT R¥M1612 MAIN UNIT R¥Z2877 Q641, Q643

© HX UNIT R¥X1069 A D801-D804, D806, D810-D813

1/f UNIT R¥X1086 D151, D501-D503, D541-D545, D621,

DISP UNIT RWZ2879 D701, D703-D705, D731-D735, D761,

NSP OPSH UNIT RWZ2888 D762, D771, D772, D832-D835

NSP TRN 2 UNIT R¥Z2890 D851-D856, D901, A D807

MAIN UNIT (For CT-S520) A 0836

SEMICONDUCTORS A D808

1C541 BA10339 D702

1C161, 1C401, C501, 1C951 BA15218N 1C551 CXA1198AP COILS AND FILTERS

1€201, 1251 CXA1330S L621

AN 1C807, C808 ICP-N20 L622 L101, L102

1C702 LC7570 L551, L552

1C101 M5220P F201, F202

A 1¢803. NJM780SFA

A 1C801 NJM7806FA CAPACITORS

A [C805 NJM7812FA C351, C401, C551, C552, C564 C771, C903

A 1C802 NJM7906FA C121, C122, C221, C222, C559, C560

A 1C806 NJM79L12A C953, C954

1C703 NM93C46N C808

IC701 PD4443A C806, C810

1¢941 TAT288P C809

1€543 TC4050BP C833

1€331 TC4052BP C628

Q771 2SA1309A C807

22

Part No.

28C3243 2SC3311A

29D 1858X 2SD2144S

25K246 DTAI24ES DIC124ES

DIC124TS 1SR35-1LO0AVL 188254

MIZJ18B MIZJ3. 6B

MIZJT. 5B MIZJ9. 1A

LFA121K RTD1054 RTF 1060 RTF1094 RTF1208

CEASO10M5S0 CEAS100M50 CEAS101M10

CEAS101M25 CEAS101M50

CEAS102M6R3 CEAS220M16 CEAS330M16 CEAS332M16

Mark No. Description

C805

C503, C504 C171, C172, C331, C332, C522, C621, (622, C702, C721 C831, C834 C209, C210, C261, C262 C207, C208, C211, C212, C259, C260, C263, C264

C505, C506 C803, C804 C801, C802 C269, C270, C407 €203-C206, C255-C258

C405, C624, C625 C403 C406, C626 C165, C166 C623

C109, C110, C402 C105, C106 C169, C170, C404 C501, C502 C557, C558

C507, C508 C181, C541, C701, C703-C705, C722, C761, C762, C851, C852, C905, C921, C955 C353, C815-C821, C941, C942 C103, C104 C113, Ci14

C101, C102 C627

MAIN UNIT (For CT-S420)

RW2Z2877 (for CT-S420) and RWZ2885 (for CT-S:

for the following:

Q163 — Q166

Q167, Q169

Q168, Q170

C165, C166

C169, C170

C853

- R169, R170

R173, R174

R175, R176

R185 — R190

JA851, JA852

23

Part No. M

Symbol & Description

CEAS332M25

CEAS3R3M50 CEAS470M16

CEAS4R7MS0 CEASR22M50 CEASR33M50 Ri

CEASR47M5 0 CENA221M10 CENA222M16 CFTXA103J50 CFTXA222J50

CFTXA332J50 CFTXA563J50 CFTXA682J50 CFTXA822J50. CFTYA223J50

CFTYA273J50 CFTYA563J50 CFTYA823J50 CGCYX473K25 CKCYB102K50

CKCYB122K50 CKCYF 103250

CKCYF 473250 O CKPUYB101K50 CKPUYB102K50

CQPA271J100 CQPA682J100

DT

DT

CFT.

CFT

RD1

RD1

RD1

RD1

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(AW 1d — 330 - 05H) HSWIL : 6OSLS 03 GNNOS : 80SIS

0/a/ssO YN AG10d =: LOSIS Wald XdW : 90SIS 3SO10/NadO : SOSIS

13S34 YSLNNOO = pOsls 3GOW Y3SLNNOD : E€0SIS

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(9 adA1) :a}0N

(NVHDVIC DILVWSHOS 404)

:(uonisod youms salesipu! auljJepun) SFHOLIMS °8

Mark No. Description Part No. Mark No. Description Part No. Mark No. Description Part No.

C251, C252, C951, C952 (C=1, V(DC)=50) RCH1079 HX UNIT CAPACITORS

C107, C108 (C=10, ¥(DC)=50) RCH1080 C1501 CEAS470M16

C201, C202, C253, C254, C553, C554 RCH1090 SEMICONDUCTORS (4. 7, V(DC) =50) 1C601 UPC1297CA RESISTORS

C173, C174, C265, C266, C555, C556 RCH1091 Q602 2SA1309A ALL RESISTORS RD1/6PMOI OD

(C=33, V(DC)=16) Q603 DIC124ES D602 18S254 OTHERS

RESISTORS CN1501 CONNECTOR (33P) HLEM33R-1

R714 (22K) RA10T223J COILS V1501 FL INDICATOR TUBE RAW1121

R707 (10K) RA4T103J L601, L602 (L=4. 6MHz, Q=75, F=105KHz) RTD1011 REMOTE CONTROL SENSOR HC-112

R701 (68K) RA4T683J (CT-S520 only) R545 (22K) RAST223J CAPACITORS 709 (68K) RAST683J C609, C610 CCCSL101K500 OPSW UNIT

C616, C617 CEAS330M35 R623, R624 (4.72) RCN1022 C614 CEASR10M50 SEMICONDUCTORS

R217, R218 (22K) RCN1023 C601, C602 CFTXA103J50 Q1401, Q1402 DIC124ES

R263, R264 (5602) RCN1024 605, C606 CFTXA223J50 D1401-D1404 18S254 R9S7, R958 (47) RCN1054 D1409 SEL6410G

R546 (11K/22K) RCX1020 C607, C608 CGCYX223K25 D1408 SEL6C10R C613 CKPUYB101K50

R611, R806 RD1/2LF010J C603, C604 CKPUYB821K50 SWITCHES

A R801 (222) RFA1/4L220J C611. C612 (C=390P, V(DC)=500) RCG1004 $1401-S1411 RSG1030 R905 (56Q) RS2LMF560J VR101, VR102, VR401, VR551, VR552 RCP1046 RESISTORS CAPACITORS (22K) VR601, VR602 VRTB6HS473 C1401 CEAS100M50 VR402, VR403 (47K) RCP 1047 OTHER RESISTORS RD1/6PMOIOD R=47K, W= 0. 1, MAKER= RESISTORS

1/f UNIT ALL RESISTORS RD1/6PUOIOO VR191 (BALANCE VR) RCS1028 VR192 REC VR) RCV1095 SEMICONDUCTORS TRN 2 UNIT OTHER RESISTORS RD1/6PMOILIC IC1111, 1€1131 BA15218N TRN 2 unit has no service part.

Q1131-Q1136 DTC124ES OTHERS D1l11 188254 MECS UNIT

CN501 CONNECTOR (33P) HLEM33S-1 JA853 MINI JACK PKN1005 CAPACITORS SWITCHES JA351 PIN JACK (4P) RKB-020 €1141-C1143 CEASO10M50 $1881 VSK1011 JA951 HEADPHONE JACK RKN1002 C1117, C1118 CEAS101M10 X701 CERAMIC RESONATOR (4. 19MHz) VSS1014 C1139, C1140 CEAS4R7MSO MECM UNIT

C1119 CEASR47M50 MECM unit has no service part.

C1133, C1134 CGCYX152K25

T-S520) have the same construction except C1135, C1136 CGCYX272K25 C1115, C1116 CGCYX332K25 1120 CGCYX473K25 C1137, C1138 CGCYX562K25

emai’ C1111. C1112 CGCYX822K25

R228. C1113 CKPUYB101K50

2SD2144S RESISTORS

DTC124ES ALL RESISTORS RD1/6PMOIOIO DTA124ES

CFTXA822J550 DISP UNIT (For CT-S520 and CT-S420)

CFTYA823J50 SEMICONDUCTORS

Q1701 DIC124ES D1501-D1509 188254

RD1/6PM222J D1510(CT-S520 only) 1SS254 RD1/6PM123J D1701 SEL6C1OR RD1/6PM564J RD1/6PM223J SWITCHES

$1505, $1508 (CT-S520 only) RSG1030

RKN1004 $1506, 1507, $1701 RSG1030 $1501-S1504 RSG1034 $1509 RSH1041

(For SCHEMATIC DIAGRAM)

Note: {Type 6)

1. When ordering service parts, be sure to refer to

"PARTS LIST of EXPLODED VIEWS” or “PCS

PARTS LIST”.

2. Since these are basic circuits, some parts of them or the

values of some components may be changed for improve-

ment.

3. RESISTORS:

Unit: k:kQ, M:MQ, or @ unless otherwise noted.

Rated power: 1/4W, 1/6W, 1/8W, 1/10W unless otherwise

noted.

Tolerance: (F): +1%, (G): +2%, (K): +10%, (M): +20% or +5% un-

less otherwise noted.

4. CAPACITORS:

Unit: p:pF or pF unless otherwise noted.

Ratings: capacitor (wF)/ voltage (V) unless otherwise noted

Rated voltage: 50V except for electrolytic capacitors.

5. COILS: Unit: m:mH or uH unless otherwise noted.

6. VOLTAGE AND CURRENT:

\__] : DC voltage (V) in STOP mode unless otherwise noted.

<& mA or—mA: DC current in STOP mode unless otherwise

noted.

7 OTHERS: e » : Signal route. °@ : Adjusting point.

e V (Red) : Measurement point.

¢ The “4 mark found on some component parts indicates the im-

portance of the safety factor of the parts. Therefore, when re-

placing, be sure to use parts of identical Gesignation.

_ SWITCHES (Underline indicates switch position):

OFPSW UNIT

$1401 : i

$1402 : <éd

$1403 «

$1404 :

$1405 : FLEX (1/f)

$1406 : REC

s1407 : Hl

$1408 : REC MUTE

S1409 : MONITOR

$1410 : CD SYNCHRO

$1411 AUTO BLE

DISP UNIT

$1501 DISP OFF

$1502 : METER RANGE

$1503 : COUNTER MODE

$1504 COUNTER RESET

$1505 : OPEN/CLOSE

S1506 : MPX FILTER

$1507 DOLBY NR OFF/B/C

$1508 : SOUND £Q

$1509 : TIMER (REC — OFF — PLAY)

$1701 POWER

CT-S520, CT-S420

8. ADJUSTMENTS

8.1 MECHANICAL ADJUSTMENT

1. Tape Speed Adjustment

Piay the STD-301 tape (3kHz) Tape speed adjustment hole 3000Hz + 5Hz

Fig. 8-1 Tape speed adjustment

tire TPS "“OlO)uve MAIN UNIT

ee TP3 L101

vRI01 R401

voz

VR403

[Eee [jor

HX UNIT

Fig. 8-2 Adjusting points

25

CT-S520, CT-S420

8.2 ELECTRICAL ADJUSTMENTS

Adjustment Conditions List of Adjustments 1. The mechanical adjustments must be completed first.

2. The head must be cleaned and demagnetized. Playback sections 3. Tum power on allow the deck to warm up for at least a few 1. Head azimuth adjustment.

minutes before commencing any electrical adjustments. 2. Playback level adjustment. 4. The reference signal is O dBV=1 Vrms.

5. Connect a 50 kQ (or between 47k to 52 kQ ) load resistance Recording sections to the OUTPUT terminals. 1. Bias oscillator adjustment.

6. Unless otherwise specified, the switches listed below are left 2. Bias trap adjustment. in the positions indicated. 3. Recording bias adjustment. DOLBY NR : OFF 4. Recording level adjustment. TAPE SELECTOR :NORM 5. AUTO BLE adjustment

Test Tapes NOTE: This unit has an automatic tape selection feature. STD-331E : Playback adjustments

(See Fig. 8~3) 2 : HX Pro headroom extension originated by Bang & Olufsen and

STD-631 : NORMAL blank Tape manufactured under license from Dolby Laboratories Licensing Corpo- STD-621 : CrOz blank tape fation . STD-610 : METAL blank tape “DOLBY" the double-D symbol 00, and “HX PRO” are trademarks of

Doldy Laboratories Licensing Corporation.

* As the reference recording level is 250 nwb/m for STD-331E, the recording level will be higher by 4 dB for STD-331B (160 nwb/m). When adjusting, pay carefull attention to the type of tape used.

OdB 30s 0 dB: 315 Hz, 250 nwb/m

Fig. 8-3 Constants of the test tape STD-331E

PLAY BACK

RECORDING

Head azimuth adjustment screw

Fig. 8-4 Head azimuth adjustment Fig. 8-5 Frequency response zone

256

CT-S520, CT-S420

PLAYBACK SECTION

1. Head Azimuth Adjustment

¢ Tum VR101, 102 to mechanical center positions.

[No.| Mode | Input signal & test tape Adjustment location Measuring location Adjustment value

Play the 10 kHz/-20 dB Head azimuth adjustment PLAY section of STD-331E test screw.

[2 STOP Lock the screw with screw lock after completing adjustment.

tape. (See Fig. 8-4)

2. Playback Level Adjustment

* This adjustment determines the DOLBY NR level, and must be performed with great care.

[No.| Mode | Input signal & test tape Adjustment location Measuring location Adjustment value

Play the 315 Hz/0 dB This adjustment must be

PLAY section of the STD-331E VR101 (Leh) TP. 3 (Leh) % performed accurately for VR102 (Reh) TP. 4 (Reh) ‘

test tape. proper Dolby lever setting.

Maximum playback signal LINE OUT

level.

RECORDING SECTION

1. Bias Oscillator Adjustment

Mode input signal & test tape Adjustment location | Measuring location | location | Adjustment value | | Adjustment value | | Remarks |

Load the STD-610 test

2. Bias Trap Adjustment

|No.| Mode | Input signal & test tape Adjustment location Measuring location Adjustment value

Load the STD--610 test L101 (Lch) ae

pf ree | tape wane input signal. [ose | L102 (Fich} sug fnmmovor ||

3. Recording Bias Adjustment

e After the adjustment, caution should be exercised so as not to become under bias by checking the distortion rate.

e | Mode | Input signal & test tape Adjustment location Measuring location Adjustment value

Apply a 315 Hz and 10 kHz signal to the line input terminals, load the STD-631 test tape.

REC tevel control volume

LINE OUT Repeatedly record, playback and adjust so that the playback level of 10 kHz signal becomes 0 dB + 0.5 dB when compared with the 315 Hz signal.

Record the above signal 2. onto the STD-631 test

tape, and playback

VR601 (Lch) VR602 (Reh)

27

CT-S520, CT-S420

4. Recording Level Adjustment

| No. Mode Input signal! & test tape Adjustment location Adjustment value Remarks

Apply a 315 Hz signal to the line input terminals, load the STD-631 test tape.

REC levei control volume LINE OUT -10.0 dBV

7 Repeatedly record, playback Record the above signal VR551 (Lech) TP. 3 (Lch) and adjust so that the onto the STD-631 test A R5 TP. 4 ba: i tape, and playback. Mie (ben) Fen) oe es ie pity

Record the above signal onto the STD-621 test tape, and playback.

TP. 3 (ich) TP. 4 (Rch) 11.2 dBV + 1.5 dB

Record the above signal onto the STD-610 test Bla : tape, and playback. 7

-11.2 GBV + 1.5 dB

5. AUTO BLE Adjustment

¢ BLE adjustment should be performed after all other adjustments are completed.

¢ This adjustment should be performed in the test mode. Entering the Test Mode. Tum on the power, and after more than 4 seconds, press the ‘COUNTER RESET" button, “COUNTER MODE” button and §f (PAUSE) button simultaneously.

* Releasing the Test Mode.

Press the “COUNTER RESET” button.

Press the AUTO BLE key 400 Hz adjustment on the front panel. (FL indication 1)

Adjust the Lch segment which is lit until Rch is not lighting up. Press the AUTO BLE key Level meter

on the front panel. Reh (FL indication 2)

Rch BOSS Press the AUTO BLE key (Mi: light up —[): not light up) 15 kHz adjustment on the front panel. . (FL indication 3)

3 kHz adjustment

28

9. IC INFORMATION

CT-S520, CT-S420

¢ The information shown in the list is basic information and may not correspond exactly to that shown in the schematic diagrams.

1. PD4443A (IC701) System Control (CPU)

@ Pin Function

FL segment output (*1) A/D 5-bit level scan output (*2) Key scan output (*3)

5 XPOFF | POWER OFF detection L (L: EDGE)

FIN Level scan input for the 1/f high frequency level

POWER KEY input detection ¢ (L: 7 POWER EDGE)

TAKE-UP side reel sense input.

e SENT For the auto stop electronic counter

Supply side reel sense input.

For measuring the remain counter.

Lch level scan input

KEYO

[er KEY3

BIAS _| Bias oscillation drive. H: ON

SYNC CD-SYNCHRO code in detection. L: IN

4-bit key scan input (L: EDGE)

CONT to CD (for CD-SYNCHRO)

| 20 | MTRS Meter amplifier gain selection.

Data input from the memory IC ea DATO | (NMS3C4sN).

22 DAT1 Data output to NM93C46N and LC7570.

Clock for communicating with

NM93C46N and LC7570

Chip select for communicating with NM93C46N

Data latch for communicating with LC7570

XBLK L CONT of all outputs of LC7570

XLMU LINE MUTE. L: ON

23

24

25

26

27

| 28 | XRMU REC MUTE. L: ON

TEST signal output for the auto BLE 29 OSC | (400 Hz, 3 kHz, 15 kHz)

Ta | — i Clock input for the CPU (4.19 MHz)

SCK

cs

WR

To GNDC

Motor CONTs for the door and reel

Ree! motor PLAY torque selection.

H: ON

Mechanism capstan motor driving.

H: ON

For resetting the CPU. L: Resetting

Output for the FL grid

| so | stay | nas cists for the POWER STANDBY.

Solenoid driving for the mechanism. (eee cone ere | 52 | mcr Motor CONTs for the door and ree!

NRSO 1 bit of the 2-bit Dolby NR selection

FL segment (*1)

VLoAD For FL. VF

CPU internal FL output buffer power

supply (Approx. -4V) VPRE

FL segment output (*1)

FL segment output (*1)

Key scan output (*3)

FL segment output (*1)

Level scan (*2)

Key scan output (*3)

pa fe [we *1: To the FL

*2: To the anodes D541 to D545

*3: To each key and SW 29g

CT-S520, CT-S420

2. NM93C46N (IC703)

Memory

@ Pin Assignment

cS Vee

SK NC

DK NC

DBO GND

Top View

3. LC7570 (IC702)

BLE Data conversion

@ Pin Function

WR For the data in latch from the CPU

SCK For the data in clock from the CPU

DAT1 Data in from the CPU ~

To Vcc +5V

All outputs L. REQUEST input

To GNDC

11 SELB 2-bit monitor switching selection

12 SELA

13 NRSS | Not used

1 bit of the 2-bit Dolby NR selection

Mechanism solenoid power reduction

selection. H: ON 15 SOLB

ri 19 RECV Meter amplifier DC output recovery fast.

H: ON

When BLE: H. Circuit selection

, CONT to CD (for CD-SYNCHRO) 21 | TOCD | | PLAY to CD, REQUEST

30

3-bit 1/f high frequency boost amount

selection (3-bit output data=0 to 7)

@ Pin Function

[Pane [ Pavone [Funcom | ae cs Chip Select

SK Serial Data Clock

1

Cc H

DI Serial Data input

Serial Data Output

NC

NC 7 i See 4 vc Power Supply

[Pave Prnens] nao = [22 wbx | Wx retard are ON _| asians [ECHO LEDane Hon | Tae [aro [Ravn isbanms ron | ac SOUND-EQ type selection (2-bit)

Filter selection during BLE

Auto BLE compensation data output

Bias 2-bit

Auto BLE compensation data output

Mid-EQ 4-bit

Auto BLE compensation data output High-EQ 4-bit

Auto BLE compensation data output Level 4-bit

CT-S520, CT-S420

10. FLINFORMATION @ V1501 (RAW1121)

Pin Connection

| Pin no. ple lalallala eealsisis alalelzlalsialaial lololel lelslalalal aan Naseer ac Oa cece AIPUN213 Sisi718/918 216 SIGIGIGIGIGIGIGIGIC IP] 111

NOTE 1) F1,F2 --- Filament 4) 16~106 --- Grid 2) NP ------ No pin

------ No connection

}

518 | uals oll, soc | Se ostte [TCOICTD RA he “erage gee) SEES") PSS ANT CIN, HIE

TE) REMAIN TIME

[TAPE (SOURCE } | CERES

o ra +h pond ngepoves | coodepo pppogoo0 —opopov00 © pg0n0000

| =-—§ @©—4 | -@S -=2@ | —4p50 2

moc00y ecoma etn | eomcom stan | eonam —stom | eoonam oto wgoooogo © agooougn | nogoooon apoooogn | nyorenys nponoNs | upsnooD cyoovoND ag0000 eo « B12 55,813 eh 816 5g) 8!? Bie

S18

ght eg” hs ole a at JIS Jel “eX “fe J AX Y rue SY Ne - “ESSE

C36) (2G) Oe (8G) Re C75)

=3 —-1 Q0000000 + onno0aNt Ooeo0o2g } © A0Db0000

; -20 = 00000000 © 90D00000 ogpeon0d §=—annonooD

0000000 © son00u00 0000000 © sndd0000

CT-S520, CT-S420

11. PANEL FACILITIES

= rT 2

i

2 @ The illustration shows CT-S520. ®@ Oo ® @®O

@ POWER STANDBY/ON switch and STANDBY indica- tor

The POWER switch activates the secondary transformer only.

Even when the switch is in the STANDBY position, there will be

a power flow to the deck’s circuits as long as the power cord is

connected to a power outlet.

@ TIMER mode/repeat play switch (TIMER REC/OFF/ PLAY-REPEAT)

@ MPX FILTER button @ Display off button (DISP OFF)

Press to turn the function display on and off.

® Level meter range selector button Press to select wide or expanded range on the level meter.

© Remote sensor window (CT-S520 only) @® Function display

Dolby* NR button (DOLBY NR OFF/B/C) * * Dolby noise reduction and HX Pro headroom extension

manufactured under license from Dolby Laboratories Licensing

Corporation. HX Pro originated by Bang & Olufsen.

* “DOLBY”; the double-D symbol DU and “HX PRO” are trade-

marks of Dolby Laboratories Licensing Corporation.

@® Tape counter mode button (COUNTER MODE) @ Counter reset/tape capacity selector button (COUNTER

RESET/TAPE CAPA)

@ SOUND EO button (CT-S520 only) @ FLEX (1/f) button

® Operation buttons 4<4/MS_ : Rewind/music search

a : Stop

>» : When pressed during stop, begins playback.

hP/MS_ : Fast forward/music search

e : Recording

iL} : When pressed during playback or recording, pauses

playback or recording. When pressed during pause,

resumes play or starts recording.

Oo : Recording mute

@ Recording level control (REC LEVEL) ® Recording balance control (REC BALANCE) @® SUPER AUTO BLE START/CLEAR button

32

® 80O080

@ Headphones jack (PHONES) @ CD-DECK SYNCHRO recording button (CD SYN-

CHRO)

@® Monitor selector button (MONITOR) Used to monitor the source sound or just recorded source dur-

ing recording.

@ When the unit is set to record or playback mode, the TAPE

indicator light up and the monitor mode is automatically se-

lected.

@ OPEN/CLOSE button (CT-S520) If the tape is moving (recording), press the stop (Ml) button be-

fore pressing this button.

If this button is pressed when the unit is in standby mode, the

cassette door opens and the function display is turned on auto-

matically.

@ Eject button (4) (CT-S420) @ If the tape is moving (recording, playback, tape winding,

etc.), press the stop (Ml) button before pressing this button.

12. SPECIFICATIONS

SYStOM 00... ccescnsesesceeeseeerenseeeeesnnerssseaesees 4-track, 2-channel stereo

Heads. Combined “Hard Permalloy” recording/playback head X 1

“Ferrite” erasing head X 1

MORO sosdiccscucecesSeccschaveesatessloscdss estsastis DC servo capstan motor X 1 DC reel motor x 1

DC loading motor X 1 (CT-S520 only)

Wow and Flutter .............-.sseeee No more than 0.05% (WRMS, JIS) No more than +0.14% (DIN)

Fast Winding Time. ............sssscsee Approx. $0 seconds (C-60 tape)

Frequency Response (at —20 dB recording level)

TYPE IV (Metal) tape... cc seeseseeesneees 20 to 21,000 Hz {+6 dB)

TYPE II (CrOz) Tape.... w+. 20 to 19,000 Hz (+6 dB)

TYPE I (Normal) Tape............c.sc00e ..20 to 19,000 Hz (+6 dB)

Signal-to-Noise Ratio (Dolby NR OFF)...........:..0+ More than 59 dB

Noise Reduction Effect

Dolby B-type NR ON......... cece More than 10 dB (at 5 kHz)

Dolby C-type NR ON.. .. More than 19 dB (at 5 kHz)

Harmonic Distortion.............:ccccesessssssreeeseeeseeeeee No more than 0.6%

(at —4 dB: 160 nwb/m)

Input (Sensitivity)

LINE (INPUT) ..............scsesesereee 100 mV (Input impedance 50 kQ)

Output (Reference level) LINE (OUTPUT) .........-..--csesoeere 0.5 V (Output impedance 3.0 kQ)

Headphones (PHONES)............. 0.63 mW (Load impedence 8 Q)

Miscellaneous

Power requirements ULK., MOdEl ..... ceseseceessssseeeeeseeereeees AC 230—-240 Volts~, 50/60 Hz European model... .AC 220—230 Voilts~, 50/60 Hz

POWEF COMSUMPTION.......--csssssesccsseccssssecesseenerenesceneseeeeestneestntssenses 20W

DIMENSIONS............0.sccessseeeeeees .420 (W)X125 (H)X280 (D) mm

Weight [CT-S520).......sceseercssseeessereeseneereee 4.2 kg (except for U.K. model)

4.5 kg (U.K. model only)

[CT-S420) .....eesssecsrcessscsseseesceceeee 4.1 kg (except for U.K. model) 4.4 kg (U.K. model only)

CT-S520, CT-S420

33