JVC AV-28BT7Exx

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No.51883 AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB 1 COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD. Jan. 2002 AV28BT7ENS / AV28BT7ENB AV28BT7EES / AV28BT7EEB AV28BT7EPS / AV28BT7EPB CONTENTS SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 2 SAFETY PRECAUTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ 4 FEATURES・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・ ・・・ ・・・ 5 MAIN DIFFERENCE LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・ 5 SPECIFIC SERVICE INSTRUCTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・ ・・・・・・・・・・・・・ ・・・・・・・・・・・・・ 6 SERVICE ADJUSTMENTS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・ 9 PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 17 OPERATING INSTRUCTIONS STANDARD CIRCUIT DIAGRAM ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・ 2-1 SERVICE MANUAL COLOUR TELEVISION

description

Service manual. chassis 11AK19PRO & 11AK19Y.2796Ko

Transcript of JVC AV-28BT7Exx

Page 1: JVC AV-28BT7Exx

No.51883

AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB

1 COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.

Jan. 2002

AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB

CONTENTS SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 2

SAFETY PRECAUTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 4

FEATURES・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 5 MAIN DIFFERENCE LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 5

SPECIFIC SERVICE INSTRUCTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 6

SERVICE ADJUSTMENTS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 9

PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 17

★ OPERATING INSTRUCTIONS

★ STANDARD CIRCUIT DIAGRAM ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・ 2-1

SERVICE MANUALCOLOUR TELEVISION

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SPECIFICATIONSContent

ITEM AV28BT7ENS (Silver)AV28BT7ENB (Black)

AV28BT7EES (Silver)AV28BT7EEB (Black)

AV28BT7EPS (Silver)AV28BT7EPB (Black)

Dimensions (WxHxD) 77 x 58 x 48 cm

Weight 33.2 kg

TV RF System B/G B/G, D/K, K1 B/G, L/L’

TV Mode PAL PAL / SECAM

Colour SystemVideo Mode

PAL / NTSC 3.58 /NTSC 4.43

PAL / SECAM / NTSC 3.58 /NTSC 4.43

Teletext System Fastext / Toptext

Stereo System A2 / German + NICAM

Tuning System Frequency Synthesizer Tuning System

Number Of CH memory position 100 ch

VHF (VL) 46.25MHZ ~ 168.25MHz

VHF (VH) 175.25MHz ~ 463.25MHz

UHF 471.25MHz ~ 863.25MHzReceiving Frequency

CATV Super (S11-S20) & Hyper (S21-S41) bands receivable

VIF Carrier 38.9MHz

32.4MHz (6.5MHz)

32.9MHz (6.0MHz)Intermediate Frequency

SIF Carrier

33.4MHz (5.5MHz)

Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz)

Aerial Input Terminal 75Ohm Unbalanced

Power Input AC 220 ~ 240V, 50Hz

Power Consumption 120W(Max.)/103W(Avg.)

Picture Tube 28 inch measured diagonally

High Voltage 28kV (in cut-off service mode)

Speaker 57 ×160 mm ellipse type ×2

Audio Output 8W + 8W

Video 1Vp-p, 75 Ohm

S/VideoY: 1Vp-p PositiveC: 0.286Vp-pInput

Audio (L/R) 500 mVrms, High Impedance

Video 1 Vp-p, 75 OhmOutput

Audio (L/R) 500 mVrms, Low Impedance

AV1 (Video/Audio/RGB)Rear Side

AV2 (Video/Audio/S-VHS)Input Terminal

Front Side AV3 (Video/Audio)

Front Side Headphone jack (Stereo mini jack 3.5 )

AV1 (Video/Audio)Output TerminalRear Side

AV2 (Video/Audio) (Selected TV, AV1 or AV3)

Remote Control Unit RM-C85, Battery size:AAA/R03 x 2

Design & specifications are subject to change without notice.

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■■■■21-pin Euro connector (SCART socket) : AV-1 / AV-2(P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak)

PinNo.

Signal Designation Matching Value AV-1 AV-2

1 AUDIO R output 500mVrms(Nominal),Low impedance ○(TV OUT)

○(TV/LINE OUT)

2 AUDIO R input 500mVrms(Nominal),High impedance ○ ○

3 AUDIO L output 500mVrms(Nominal),Low impedance ○(TV OUT)

○(TV/LINE OUT)

4 AUDIO GND ○ ○

5 GND (B) ○ ○

6 AUDIO L input 500mVrms(Nominal), High impedance ○ ○

7 B input 700mVB-W, 75Ω ○ NC

8FUNCTON SW(SLOW SW)

Low : 0-3V, High : 8-12V, High impedance ○ NC

9 GND (G) ○ ○

10 - NC -

11 G input 700mVB-W, 75Ω ○ NC

12 - NC -

13 GND (R) ○ ○

14 GND (YS) ○ NC

15 R / C inputR : 700mVB-W, 75ΩC : 300mVP-P, 75Ω

○(R/C)

○(only C)

16 Ys input Low : 0 – 0.4, High : 1 - 3V, 75Ω ○ NC

17 GND(VIDEO output) ○ ○

18 GND(VIDEO input) ○ ○

19 VIDEO output 1VS-W(Negative going sync), 75Ω○

(TV)○

(TV/LINE OUT)

20 VIDEO / Y input 1VS-W(Negative going sync), 75Ω ○ ○

21 COMMON GND ○ ○

[Pin assignment]

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SAFETY PRECAUTIONS1. The design of this product contains special hardware, many

circuits and components specially for safety purposes. Forcontinued protection, no changes should be made to the originaldesign unless authorized in writing by the manufacturer.Replacement parts must be identical to those used in the originalcircuits. Service should be performed by qualified personnelonly.

2. Alterations of the design or circuitry of the products should not be

made. Any design alterations or additions will void themanufacturer's warranty and will further relieve the manufacturerof responsibility for personal injury or property damage resultingtherefrom.

3. Many electrical and mechanical parts in the products have

special safety-related characteristics. These characteristics areoften not evident from visual inspection nor can the protectionafforded by them necessarily be obtained by using replacementcomponents rated for higher voltage, wattage, etc. Replacementparts which have these special safety characteristics areidentified in the parts list of Service manual. Electricalcomponents having such features are identified by shadingon the schematics and by ( ) on the parts list in Servicemanual. The use of a substitute replacement which does nothave the same safety characteristics as the recommendedreplacement part shown in the parts list of Service manual maycause shock, fire, or other hazards.

4. Don't short between the LIVE side ground and ISOLATED

(NEUTRAL) side ground or EARTH side ground whenrepairing.Some model's power circuit is partly different in the GND. Thedifference of the GND is shown by the LIVE side GND, theISOLATED(NEUTRAL) side GND and EARTH side GND. Don'tshort between the LIVE side GND and ISOLATED(NEUTRAL)side GND or EARTH side GND and never measure with ameasuring apparatus (oscilloscope etc.) the LIVE side GND andISOLATED(NEUTRAL) side GND or EARTH side GND at thesame time.If above note will not be kept, a fuse or any parts will be broken.

5. If any repair has been made to the chassis, it is recommended

that the B1 setting should be checked or adjusted (SeeADJUSTMENT OF B1 POWER SUPPLY).

6. The high voltage applied to the picture tube must conform with

that specified in Service manual. Excessive high voltage cancause an increase in X-Ray emission, arcing and possiblecomponent damage, therefore operation under excessive highvoltage conditions should be kept to a minimum, or should beprevented. If severe arcing occurs, remove the AC powerimmediately and determine the cause by visual inspection(incorrect installation, cracked or melted high voltage harness,poor soldering, etc.). To maintain the proper minimum level ofsoft X-Ray emission, components in the high voltage circuitryincluding the picture tube must be the exact replacements oralternatives approved by the manufacturer of the completeproduct.

7. Do not check high voltage by drawing an arc. Use a high voltage

meter or a high voltage probe with a VTVM. Discharge thepicture tube before attempting meter connection, by connectinga clip lead to the ground frame and connecting the other end ofthe lead through a 10k 2W resistor to the anode button.

8. When service is required, observe the original lead dress. Extra

precaution should be given to assure correct lead dress in thehigh voltage circuit area. Where a short circuit has occurred,those components that indicate evidence of overheating shouldbe replaced. Always use the manufacturer's replacementcomponents.

9. Isolation Check(Safety for Electrical Shock Hazard)After re-assembling the product, always perform an isolationcheck on the exposed metal parts of the cabinet (antennaterminals, video/audio input and output terminals, Control knobs,metal cabinet, screwheads, earphone jack, control shafts, etc.)to be sure the product is safe to operate without danger ofelectrical shock.

(1) Dielectric Strength TestThe isolation between the AC primary circuit and all metal partsexposed to the user, particularly any exposed metal part having areturn path to the chassis should withstand a voltage of 3000VAC (r.m.s.) for a period of one second.(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an appliancerated up to 120V, and 3000V AC (r.m.s.) to an appliance rated200V or more, for a period of one second.)This method of test requires a test equipment not generally foundin the service trade.

(2) Leakage Current CheckPlug the AC line cord directly into the AC outlet (do not use a lineisolation transformer during this check.). Using a "LeakageCurrent Tester", measure the leakage current from each exposedmetal part of the cabinet, particularly any exposed metal parthaving a return path to the chassis, to a known good earthground (water pipe, etc.). Any leakage current must not exceed0.5mA AC (r.m.s.).However, in tropical area, this must not exceed 0.2mA AC(r.m.s.).

Alternate Check MethodPlug the AC line cord directly into the AC outlet (do not use a lineisolation transformer during this check.). Use an AC voltmeterhaving 1000 ohms per volt or more sensitivity in the followingmanner. Connect a 1500 10W resistor paralleled by a 0.15 FAC-type capacitor between an exposed metal part and a knowngood earth ground (water pipe, etc.). Measure the AC voltageacross the resistor with the AC voltmeter. Move the resistorconnection to each exposed metal part, particularly any exposedmetal part having a return path to the chassis, and measure theAC voltage across the resistor. Now, reverse the plug in the ACoutlet and repeat each measurement. Any voltage measuredmust not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mAAC (r.m.s.).However, in tropical area, this must not exceed 0.3V AC (r.m.s.).This corresponds to 0.2mA AC (r.m.s.).

0.15μF AC-TYPE

1500 10W

GOOD EARTH GROUND

PLACE THIS PROBEON EACH EXPOSEDMETAL PART

AC VOLTMETER(HAVING 1000 /V,OR MORE SENSITIVITY)

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FEATURES1. It is a remte controlled color television.

2. 100 programs from VHF, UHF bands or cable channels can be

preset.

3. It can tune cable channels.

4. Controlling the TV is very easy by its menu driven system.

5. It has two Euroconnector sockets for external device (such as

video recorder, video games, audio set, etc.)

6. Front AV Input available.

7. Stereo sound systems (German + Nicam) are available.

8. Full function Teletext (Fastext, Toptext).

9. It is possible to connect headphone.

10. Direct channel access.

11. APS (Automatic Programming System).

12. All programs can be named.

13. Forward or backward automatic tuning.

14. Automatic sound mute when no transmission.

15. 5 minutes after the broadcasting (closedown), the TV switches

itself automatically to stand-by mode.

MAIN DIFFERENCE LISTMODEL No.

Parts NameAV28BT7ENS

(Silver)AV28BT7ENB

(Black)AV28BT7EES

(Silver)AV28BT7EEB

(Black)AV28BT7EPS

(Silver)AV28BT7EPB

(Black)

MAIN PWB VE-20073586 VE-20073447 VE-20081473

F CARTON BOX VE-20083462 VE-20083400 VE-20083464 VE-20083469 VE-20083471 VE-20083484

INST BOOK VE-20083463 VE-20083402 VE-20083466 VE-20083468 VE-20083470 VE-20083483

RATING LABEL VE-20083403 VE-20083401 VE-20083465 VE-20083467 VE-20083482 VE-20083485

FRONT CABINET VE-20082289 VE-20081489 VE-20082289 VE-20081489 VE-20082289 VE-20081489

BACK COVER VE-20082322 VE-20069017 VE-20082322 VE-20069017 VE-20082322 VE-20069017

TV RF system B/G B/G, D/K,K1 B/G,L/L’

TV PAL PAL / SECAMColoursystem

VIDEOPALNTSC 3.58NTSC 4.43

PAL / SCAMNTSC 3.58NTSC 4.43

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SPECIFIC SERVICE INSTRUCTIONSDISASSEMBLY PROCEDUREREMOVING THE REAR COVER1. Remove the 8 screws marked A.

2. Withdraw the rear cover toward you.

REMOVING THE FRONT AV + HEADPHONE JACKBOARD ASS’Y

After removing the rear cover.

1. Remove the 2 screws marked B, and remove the FRONT AV +

HEADPHONE JACK BOARD ASS’Y.

REMOVING THE FRONT CONTROL PWB After removing the rear cover.

1. Remove the MAIN PWB ASS’Y.

2. Remove the 5 screws marked C, and remove the FRONT

CONTROL PWB.

REMOVING THE SPEAKER After removing the rear cover.

1. Remove the 4 screws marked D, and remove the SPEAKER.

2. Remove an opposite side similarly.

REMOVING THE MAIN PWB After removing the rear cover.

1. Draw out back and remove the MAIN PWB ASS’Y,

CAUTIONS)

Be careful enough when developing a main chassis.

The wire of a POWER TRANSFER does not separate

and short-circuit with other parts.

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REAR COVER

SPEAKER

D

MAIN PWB

FRONT CABINET

FRONT AV +HEADPHONE JACKPWB

FRONTCONTROLPWB

B

C

D

SPEAKER

A(×8)

(×4)

(×5)

(×2)

(×4)

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SETTING OF THE LAST MEMORY FOR SHIPMENT■■■■ USER SETTING VALUES

Setting Item Setting Value Setting Item Setting Value

SOUND MENU FEATURE MENU

BASS CENTER SLEEP TIMER OFF

TREBLE ↑ CHILD LOCK OFF

BALANCE ↑

EFFECT OFF

PICTURE MENU INSTALL-> TV CONFIG. MENU

BRIGHTNESS LANGUAGE ENGLISH

COLOUR COUNTRY ?

CONTRAST AV-2 OUTPUT TV

SHARPNESS

HUE (only NTSC)

These adjust are automatically

restored when APS bit in Service

menu is set.

The procedure for setting APS

bit is described bellow.

PICTURE MODE AUTO

■ SETTING APS BIT IN SERVICE MENU1) Enter service menu in TV mode by pressing “INFO” and “MUTING” keys simultaneously. Service Menu will appear.

2) Select OPTIONS by pressing Up/Down keys on remote control unit.

3) Enter OPTIONS by pressing Left/Right keys on remote control unit.

4) Select OPTION 8 by pressing Up/Down keys on remote control unit.

5) Selected bit in one OPTION is shown by blinking character. Select B2 by pressing Left/Right keys on remote control unit.

DO NOT CHANGE ANY OTHER BIT.

6) Press digit key “1” to set APS bit.

7) Press “STANDARD” key on remote control unit to exit service mode.

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9

SERVICE ADJUSTMENTSADJUSTMENT PREPARATION1. You can make the necessary adjustments for this unit with

either the Remote Control Unit or With the adjustment tools

and parts as given below.

2. Adjustment with the Remote Control Unit is made on the

basis of the initial setting values, however, the new setting

values which set the screen to its optimum condition may

differ from the initial settings.

3. Make sure that AC power is turned on correctly.

4. Turn on the power for set and test equipment before use, and

start the adjustment procedures after waiting at least 30 minutes.

5. Unless otherwise specified, prepare the most suitable reception

or input signal for adjustment.

6. Never touch any adjustment parts which are not specified in the

list for this adjustment - variable resistors, transformers,

condensers, etc.

7. Presetting before adjustment.

Unless otherwise specified in the adjustment instructions, preset

the following functions with the remote control unit:

VIDEO STATUS STANDARD

TINT/COLOR

PICTURE/BRIGHT

DETAIL

CENTER

ADJUSTMENT EQUIPMENT1. DC voltmeter (or digital voltmeter)

2. Signal generator (Pattern generator)[PAL/SECAM/NTSC]

3. Remote control unit

MAIN PARTS LOCATIONS

IC501MICOM

IC502

MEMORY IC

TUNER AV-1 AV-2

MULTI SOUND PWBFBT

UPPER : FOCUS VRLOWER : SCREEN VR

B1(Indicated [150/115V]on the bottom side)

VOL

(+)(+)(+)(+) (-)(-)(-)(-)PROG

/Ch.

(+)(+)(+)(+) (-)(-)(-)(-)MENULED REMOCON

RECEIVER

FRONT

TOPFRONT

AUDIO.

VIDEO R L

HEADPHONE JACK

SCARTjack

SCARTjack

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10

BASIC OPERATION SERVICE MENU■■■■ HOW TO ENTER THE SERVICE MODE1) Press the INFORMATION key and MUTING key of

REMOTE CONTROL UNIT simultaneously.

■■■■ SELECTION OF ADJUSTMENT ITEMS1) Press the UP ( ) or DOWN ( ) key and select

the service menu item.

2) Press the RIGHT ( ) or LEFT ( ) key and

enter ADJUSTMENT SCREEN.

3) Select the ADJUST No., use RIGHT ( ) / LEFT ( )

key of remote control unit.

4) To change the selected parameter, use RIGHT ( )

and LEFT ( ) key.

■ HOW TO EXIT SERVICE MODE

1) Press the STANDARD Key on REMOTE CONTROL UNIT.

■■■■ ADJUSTMENT SERVICE MENU

ADJUSTMENT ITEM ADJUSTNo.

DISCRIPTION

00 White Point RED

01 White Point GREENWHITE BALANCE

02 White Point BLUE

AGC 03 AGC

IF-PLL NEGATIVE 04 IF-PLL Negative

IF-PLL POSITIVE 05 IF-PLL Positive

06 Y-Delay PAL

07 Y-Delay SECAMLUMINANCE DELAY

08 Y-Delay NTSC

10 4 : 3 PICTURE MODEVERTICAL ZOOM

21 16 : 9 PICTURE MODE

11 4 : 3 PICTURE MODEVERTICAL SCROLL

22 16 : 9 PICTURE MODE

12 4 : 3 PICTURE MODE4 : 3 HORIZONTAL SHIFT

23 16 : 9 PICTURE MODE

13 4 : 3 PICTURE MODEVERTICAL SLOPE

24 16 : 9 PICTURE MODE

14 4 : 3 PICTURE MODEVERTICAL AMPLITUDE

25 16 : 9 PICTURE MODE

15 4 : 3 PICTURE MODES-CORRECTION

26 16 : 9 PICTURE MODE

16 4 : 3 PICTURE MODEVERTICAL SHIFT

27 16 : 9 PICTURE MODE

17 4 : 3 PICTURE MODEEW WIDTH

28 16 : 9 PICTURE MODE

18 4 : 3 PICTURE MODEEW PARABOLA WIDTH

29 16 : 9 PICTURE MODE

19 4 : 3 PICTURE MODEEW CORNER PARABOLA

30 16 : 9 PICTURE MODE

20 4 : 3 PICTURE MODEEW TRAPEZIUM

31 16 : 9 PICTURE MODE

SERVICE

ADJUST…..

OPTIONS…..

SERVICE MENU SCREEN

ADJUST *** ******

***

OUT UP

ADJUSTMENT SCREEN

SERVICEMENU ITEM

ADJUST No.

PARAMETERPARAMETERVALUE

REMOTE CONTROL UNIT key NAME

MUTING key

UP / DOWN( / ) key

INFORMATIONkey

STANDARD key

RIGHT / LEFT( / ) key

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11

ADJUSTMENTS

ItemMeasuringinstrument Test point Adjustment part Description

SCREENVOLTAGEAdjustment

SignalGenerator

RemoteControlunit

SCREEN VR

[FBT]

OPTION 02

1. Receive a PAL colour bar.

2. Enter the option settings in the SERVICE MENU.

3. Press the UP / DOWN ( ▲/ ▼) key, and Enter Option 02.

4. To change bit 6, come on to it by using L / R ( / ) key and

make it “1” by pressing “1” white bit 2 is blinking.

5. Observe the thin horizontal blue-white line in the middle of the

screen, and adjust the lower VR of the FBT, until the line is in

its thinnest visible thickness.

6. Then make Option 02 bit 6 “0” , by pressing “0” on the remote

control unit, although you do not see any picture.

FOCUSAdjustment

Signalgenerator

FOCUS VR

[FBT]

1. Receive a PAL circle pattern.

2. Adjust the upper VR of the FBT, until you get the Optinum

focus, the sharpest picture.

B1VOLTAGEcheck

DC

Voltmeter

Marked

[150/115V]

on the

MAIN PWB

1. Check whether the voltage at the point named and silk

screened as “150 / 115V” on the MAIN PWB is 150V DC.

SERVICE

ADJUST…..

OPTIONS…..

SERVICE MENU

SELECT OPTION menu

FOCOUS

SCREEN

FBT

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12

Item Measuringinstruments

Test point Adjustment part Description

WHITE

BALANCE

Signal

generator

ADJUST 00

(White point- RED)

ADJUST 01

(White point- GREEN)

ADJUST 02

(White point - BLUE)

[LOW LIGHT]

1. Receive a whole black signal.

2. Adjust the <Adjust 00>, <Adjust 01>, <Adjust 02>, in the

SERVICE MENU so that the entire screen do not shine black.

[HIGH LIGHT]

1. Receive a white and black signal (colour off).

2. Adjust the <Adjust 00>, <Adjust 01>, <Adjust 02>, in the

SERVICE MENU so that the whiteness in the screen become

sharp.

AGC

Adjustment

DC

voltmeter

ADJUST 03 1. Receive a any broadcast.

2. Select <ADJUST 03> from SERVICE MENU

3. Connect a DC voltmeter to pin 1 of the tuner. Change the

AGC parameter until you see 3.70V DC on voltmeter display.

IF-PLL

NEGATIVE

Adjustment

ADJUST 04 1. Select <ADJUST 04> from SERVICE MENU.

2. Adjustment value is set to 80 as a default value.

IF-PLL

POSITIVE

Adjustment

ADJUST 05 1. Select <ADJUST 05> from SERVICE MENU.

2. Adjustment value is set to 80 as a default value.

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13

Item Measuringinstruments

Test point Adjustment part Description

Adjust 06 [ Y-Delay PAL ]

1. Receive a PAL colour bar signal.

2. Select <Adjust 06> from SERVICE MENU.

3. Adjust Y-Delay PAL till the colour transients on the colour

bar of the pattern become as sharper and colours between

transients do not mix with each other as possible.

Note: If the SAW filter is one of the G1965M, J1951M, K2958M,

K2962M, G3957M, K6256K, K6259K or M1963M, there is

constant group delay distortion, so for an equal delay of

the luminance and chrominance signal the delay must be

set at a value of 160nS. This means the adjustment must

be set to the maximum value.

Adjust 07 [ Y-Delay SECAM ]

1. Receive a SECAM colour bar signal.

2. Select <Adjust 07> from SERVICE MENU.

3. Adjust Y-Delay SECAM till the colour transients on the

colour bar of the pattern become as sharper and colours

between transients do not mix with each other as possible.

Note: If the SAW filter is one of the G1965M, K2958M,

K2962M, G3957M, K6256K or K6259K, there is constant

group delay distortion, so for an equal delay of the

luminance and chrominance signal the delay must be set

at a value of 160nS. This means the adjustment must be

set to the maximum value.

LUMINANCE

DELAY

Adjustment

Signal

generator

Adjust 08 [ Y-Delay NTSC ]

1. Receive a NTSC colour bar signal.

2. Select <Adjust 08> from SERVICE MENU.

3. Adjust Y-Delay NTSC till the colour transients on the colour

bar of the pattern become as sharper and colours between

transients do not mix with each other as possible.

Note: If the SAW filter is M1963M, there is constant group delay

distortion, so for an equal delay of the luminance and

chrominance signal the delay must be set at a value of

160nS. This means the adjustment must be set to the

maximum value.

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14

Item Measuringinstruments

Test point Adjustment part Description

VERTICAL

ZOOM

Adjustment

Signal

generator

Adjust 10 ( 4 : 3 )

Adjust 21 ( 16 : 9 )

1. Receive a PAL circle test pattern.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 10 > from SERVICE MENU.

4. Change vertical zoom till you see the upper and olwer limit

of the circle as close to the upper and lower limit of the

picture tube as possible.

5. Set < 16 : 9 aspect mode >.

6. Adjusts with the step which is the same above from 3 to 4

about the 16 : 9 aspect mode, too.

VERTICAL

SCROLL

Adjustment

Signal

generator

Adjust 11 ( 4 : 3 )

Adjust 22 ( 16 : 9 )

1. Receive a PAL circle test pattern.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 11 > from SERVICE MENU.

4. Change vertical scroll till you see the circle exactly un the

middle of the screen.

5. Set < 16 : 9 aspect mode >.

6. Adjusts with the step which is the same above from 3 to 4

about the 16 : 9 aspect mode, too.

4 : 3

HORIZONTAL

SHIFT

Adjustment

Signal

generator

Adjust 12 ( 4 : 3 )

Adjust 23 ( 16 : 9 )

1. Receive a RED PURITY test pattern.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 12 > from SERVICE MENU.

4. Change horizontal shift till the picture is horizontally

centered. Check whether this adjustment is correct after

completing Service Mode Adjustment.

5. Set < 16 : 9 aspect mode >.

6. Adjusts with the step which is the same above from 3 to 4

about the 16 : 9 aspect mode, too.

VERTICAL

SLOPE

Adjustment

Signal

generator

Adjust 13 ( 4 : 3 )

Adjust 24 ( 16 : 9 )

1. Receive a CROSS-HATCH signal.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 13 > from SERVICE MENU.

4. Change vertical slope till the size of squares on both the

upper and lower part of test pattern become equal to the

squares laying on the vertical centre of the test pattern.

5. Check and readjust VERTICAL SLOPE item if the

adjustment becomes improper after some other geometric

adjustments are done.

6. Set < 16 : 9 aspect mode >.

7. Adjusts with the step which is the same above from 3 to 5

about the 16 : 9 aspect mode, too.

VERTICAL

AMPLITUDE

Adjustment

Signal

generator

Adjust 14 ( 4 : 3 )

Adjust 25 ( 16 : 9 )

1. Receive a PAL test pattern signal.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 14 > from SERVICE MENU.

4. Change vertical slope till horizontal black lines on both the

upper and lower part of the test pattern become very close

to the upper and lower horizontal sides of picture tube and

nearly about to disappear.

5. Check and readjust VERTICAL AMPLITUDE item if the

adjustment becomes improper after some other geometric

adjustments are done.

6. Set < 16 : 9 aspect mode >.

7. Adjusts with the step which is the same above from 3 to 5

about the 16 : 9 aspect mode, too.

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15

Item Measuringinstrument

Test point Adjustment part Description

S-CORRECTION

Adjustment

Signal

generator

Adjust 15 ( 4 : 3 )

Adjust 26 ( 16 : 9 )

1. Receive a PAL circle pattern signal.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 15 > from SERVICE MENU.

4. Change S-correction till the middle part of the circle is round

as possible.

5. Set < 16 : 9 aspect mode >.

6. Adjusts with the step which is the same above from 3 to 4

about the 16 : 9 aspect mode, too.

VERTICALSHIFT

Adjustment

Signal

generator

Adjust 16 ( 4 : 3 )

Adjust 27 ( 16 : 9 )

1. Receive a PAL test pattern signal ( or the symmetrical signal

in the top and the bottom and on either side to find ).

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 16 > from SERVICE MENU.

4. Change Vertical Shift till the test pattern is vertically centred,

i.e. horizontal line at the centre pattern is in equal distance

both to upper and lower side of the picture tube.

5. Check and readjust Vertical Shift item if the adjustment

becomes improper after some other geometric adjustments

are done.

6. Set < 16 : 9 aspect mode >.

7. Adjusts with the step which is the same above from 3 to 5

about the 16 : 9 aspect mode, too.

EW WIDTH

Adjustment

Signal

generator

Adjust 17 ( 4 : 3 )

Adjust 28 ( 16 : 9 )

1. Receive a PAL test pattern signal.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 17 > from SERVICE MENU.

4. Change EW Width till the vertical black and white bars on

both left and right side of the pattern exactly disappear.

5. Set < 16 : 9 aspect mode >.

6. Adjusts with the step which is the same above from 3 to 4

about the 16 : 9 aspect mode, too.

EWPARABOLAWIDTH

Adjustment

Signal

generator

Adjust 18 ( 4 : 3 )

Adjust 29 ( 16 : 9 )

1. Receive a PAL test pattern signal.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 18 > from SERVICE MENU.

4. Change EW Parabola Width till vertical lines close to the both

sides of the picture frame become parallel to vertical side of

picture tube.

5. Check and readjust EW Parabola Width item if the

adjustment becomes improper after some other geometric

adjustments are done.

6. Set < 16 : 9 aspect mode >.

7. Adjusts with the step which is the same above from 3 to 5

about the 16 : 9 aspect mode, too.

EW CORNERPARABOLA

Adjustment

Signal

generator

Adjust 19 ( 4 : 3 )

Adjust 30 ( 16 : 9 )

1. Receive a PAL test pattern signal.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 19 > from SERVICE MENU.

4. Change EW Corner Parabola till vertical lines at the corners

of both sides of picture frame become vertical and parallel to

vertical corner sides of picture tube.

5. Check and readjust EW Corner Parabola item if the

adjustment becomes improper after some other geometric

adjustments are done.

6. Set < 16 : 9 aspect mode >.

7. Adjusts with the step which is the same above from 3 to 5

about the 16 : 9 aspect mode, too.

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AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB

16

Item Measuringinstrument

Test point Adjustment part Description

EW

TRAPEZIUM

Adjustment

Signal

generator

Adjust 20 ( 4 : 3 )

Adjust 31 ( 16 : 9 )

1. Receive a PAL circle pattern signal.

2. Set < 4 : 3 aspect mode >.

3. Select < ADJUST 20 > from SERVICE MENU.

4. Change EW Trapezium till vertical lines, especially lines at

the sides of the picture frame became parallel to the both

sides of picture tube as possible.

5. Check and readjust EW Trapezium item if the adjustment

becomes improper after some other geometric adjustment.

6. Set < 16 : 9 aspect mode >.

7. Adjusts with the step which is the same above from 3 to 5

about the 16 : 9 aspect mode, too.

Page 17: JVC AV-28BT7Exx

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AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB

17

PARTS LISTCONTENTS

USING PW BOARD & REMOTE CONTROL UNIT ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・17

EXPLODED VIEW PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・18

EXPLODED VIEW ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・19

PRINTED WIRING BOARD PARTS LIST

MAIN PW BOARD ASS'Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・20

MULTI SOUND PW BOARD ASS’Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・25

CRT SOCKET PW BOARD ASS'Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26

FRONT CONTROL PW BOARD ASS’Y・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26

FRONT AV + HEADPHONE JACK PW BOARD ASS’Y・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26

PROTECTION MODULE PW BOARD ASS’Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26

T(SPOT KILLER) MODULE PW BOARD ASS’Y・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・26

MAIN PW BOARD ASS'Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・27

MAIN PW BOARD ASS'Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・32

MULTI SOUND PW BOARD ASS’Y ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・37

PACKING / PACKING PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・39

USING PW BOARD & REMOTE CONTROL UNIT

Model

PWB ASS'Y

AV28BT7ENSAV28BT7ENB

AV28BT7EESAV28BT7EEB

AV28BT7EPSAV28BT7EPB

MAIN PWB VE-20073586 VE-20073447 VE-20071473

MULTI SOUND PWB VE-20078991 VE-20079020

CRT SOCKET PWB VE-20074437

FRONT CONTROL PWB VE-20001612

FRONT AV + HEADPHONEJACK PWB

VE-20083646

PROTECTION MODULE PWB VE-20058569

T(SPOT KILLER) MODELE PWB VE-20019598

REMOTE CONTROL UNIT RM-C85

[ AV28BT7EPS / AV28BT7EPB]

[ AV28BT7ENS / AV28BT7ENB]

[ AV28BT7EES / AV28BT7EEB]

Page 18: JVC AV-28BT7Exx

No. 51883

AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB

18

EXPLODED VIEW PARTS LIST

[ SILVER model : AV28BT7ENS, AV28BT7EES, AV28BT7EPS]

[ BLACK model : AV28BT7ENB, AV28BT7EEB, AV28BT7EPB ]

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No. 51883

AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB

19

EXPLODED VIEW

MAIN PWB

V01

17

5

11

11

FRONT AV +HEADPHONE JACKPWB

FRONTCONTROLPWB

6

3

12

4

7

8

910

1213

14

15

16

13

12

Page 20: JVC AV-28BT7Exx

No. 51883

AV28BT7ENS / AV28BT7ENB

20

PRINTED WIRING BOARD PARTS LIST

MAIN P.W. BOARD ASS’Y (VE-20073586)

[ AV28BT7ENS / AV28BT7ENB ]

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No. 51883

AV28BT7ENS / AV28BT7ENB

21

[ AV28BT7ENS / AV28BT7ENB ]

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No. 51883

AV28BT7ENS / AV28BT7ENB

22

[ AV28BT7ENS / AV28BT7ENB ]

Page 23: JVC AV-28BT7Exx

No. 51883

AV28BT7ENS / AV28BT7ENB

23

°

°

[ AV28BT7ENS / AV28BT7ENB ]

Page 24: JVC AV-28BT7Exx

No. 51883

AV28BT7ENS / AV28BT7ENB

24

[ AV28BT7ENS / AV28BT7ENB ]

Page 25: JVC AV-28BT7Exx

No. 51883

AV28BT7ENS / AV28BT7ENB

25

MULTI SOUND P.W. BOARD ASS’Y (VE-20078991)

[ AV28BT7ENS / AV28BT7ENB ]

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No. 51883

AV28BT7ENS / AV28BT7ENB

26

CRT SOCKET P.W. BOARD ASS’Y (VE-20074437)

FRONT CONTROL P.W. BOARD ASS’Y

(VE-20001612)

FRONT AV + HEADPHONE JACK P.W. BOARDASS’Y (VE-20083646)

PROTECTION MODULE P.W. BOARD ASS’Y

(VE-20058569)

T(SPOT KILLER) MODULE P.W. BOARD ASS’Y

(VE-20019598)

[ AV28BT7ENS / AV28BT7ENB ]

Page 27: JVC AV-28BT7Exx

No. 51881

AV28BT7EES / AV28BT7EEB

27

PRINTED WIRING BOARD PARTS LIST

MAIN P.W. BOARD ASS’Y (VE-20073447)

[ AV28BT7EES / AV28BT7EEB ]

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No. 51881

AV28BT7EES / AV28BT7EEB

28

[ AV28BT7EES / AV28BT7EEB ]

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No. 51881

AV28BT7EES / AV28BT7EEB

29

[ AV28BT7EES / AV28BT7EEB ]

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No. 51881

AV28BT7EES / AV28BT7EEB

30

°

°

[ AV28BT7EES / AV28BT7EEB ]

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No. 51881

AV28BT7EES / AV28BT7EEB

31

MULTI SOUND P.W. BOARD ASS’Y (VE-20078991)

Refer to PARTS LIST in page 24 for this P.W. board.

CRT SOCKET P.W. BOARD ASS’Y (VE-20074437)

Refer to PARTS LIST in page 25 for this P.W. board.

FRONT CONTROL P.W. BOARD ASS’Y

(VE-20001612)

Refer to PARTS LIST in page 25 for this P.W. board.

FRONT AV + HEADPHONE JACK P.W. BOARDASS’Y (VE-20083646)

Refer to PARTS LIST in page 25 for this P.W. board.

PROTECTION MODULE P.W. BOARD ASS’Y

(VE-20058569)

Refer to PARTS LIST in page 25 for this P.W. board.

T(SPOT KILLER) MODULE P.W. BOARD ASS’Y

(VE-20019598)

Refer to PARTS LIST in page 25 for this P.W. board.

[ AV28BT7EES / AV28BT7EEB ]

Page 32: JVC AV-28BT7Exx

No. 51883

AV28BT7EPS / AV28BT7EPB

32

PRINTED WIRING BOARD PARTS LIST

MAIN P.W. BOARD ASS’Y (VE-20071473)

[ AV28BT7EPS / AV27BT7EPB ]

Page 33: JVC AV-28BT7Exx

No. 51883

AV28BT7EPS / AV28BT7EPB

33

[ AV28BT7EPS / AV28BT7EPB ]

Page 34: JVC AV-28BT7Exx

No. 51883

AV28BT7EPS / AV28BT7EPB

34

[ AV28BT7EPS / AV28BT7EPB ]

Page 35: JVC AV-28BT7Exx

No. 51883

AV28BT7EPS / AV28BT7EPB

35

°

°

[ AV28BT7EPS / AV28BT7EPB ]

Page 36: JVC AV-28BT7Exx

No. 51883

AV28BT7EPS / AV28BT7EPB

36

[ AV28BT7EPS / AV28BT7EPB ]

Page 37: JVC AV-28BT7Exx

No. 51883

AV28BT7EPS / AV28BT7EPB

37

MULTI SOUND P.W. BOARD ASS’Y (VE-20079020)

[ AV28BT7EPS / AV28BT7EPB ]

Page 38: JVC AV-28BT7Exx

No. 51883

AV28BT7EPS / AV28BT7EPB

38

CRT SOCKET P.W. BOARD ASS’Y (VE-20074437)

Refer to PARTS LIST in page 25 for this P.W. board.

FRONT CONTROL P.W. BOARD ASS’Y

(VE-20001612)

Refer to PARTS LIST in page 25 for this P.W. board.

FRONT AV + HEADPHONE JACK P.W. BOARDASS’Y (VE-20083646)

Refer to PARTS LIST in page 25 for this P.W. board.

PROTECTION MODULE P.W. BOARD ASS’Y

(VE-20058569)

Refer to PARTS LIST in page 25 for this P.W. board.

T(SPOT KILLER) MODULE P.W. BOARD ASS’Y

(VE-20019598)

Refer to PARTS LIST in page 25 for this P.W. board.

[ AV28BT7EPS / AV28BT7EPB ]

Page 39: JVC AV-28BT7Exx

No. 51883

AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB

39

1

3

2

2

5 6 7

4

8

PACKING

PACKING PARTS LIST

Page 40: JVC AV-28BT7Exx

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STANDARD CIRCUIT DIAGRAM

NOTE ON USING CIRCUIT DIAGRAMS1.SAFETY

The components identified by the symbol and shading arecritical for safety. For continued safety replace safety critical components only with manufactures recommended parts.

2.SPECIFIED VOLTAGE AND WAVEFORM VALUESThe voltage and waveform values have been measured under the following conditions.

(1)Input signal : Colour bar signal

(2)Setting positions of each knob/button and variable resistor

(3)Internal resistance of tester :DC 20k /V

(4)Oscilloscope sweeping time :H 20µS/div

:V 5mS/div

:Others Sweeping time is specified

(5)Voltage values :All DC voltage values

Since the voltage values of signal circuit vary to some extent according to adjustments, use them as reference values.

3.INDICATIONS ON THE CIRCUIT DIAGRAM(1)Resistors

Resistance value

No unit :[ ]

K :[K ]M

Type

No indication :Carbon resistorOMR :Oxide metal film resistorMFR :Metal film resistorMPR :Metal plate resistorUNFR :Uninflammable resistorFR :Fusible resistor

Composition resistor 1/2 [W] is specified as 1/2S or Comp.

(2)Capacitors

: Original setting position when shipped

4.NOTE FOR REPAIRING SERVICEThis model's power circuit is partly different in the GND. The difference of the GND is shown by the LIVE side GND and the ISOLATED(NEUTRAL) side GND.Therefore, care must be taken for the following points.

(1)Do not touch the LIVE side GND or the LIVE side GND and the ISOLATED(NEUTRAL) side GND simultaneously. If the above caution is not respected, an electric shock may be caused. Therefore, make sure that the power cord is surely removed from the receptacle when, for example, the chassis is pulled out.

(2)Do not short between the LIVE side GND and ISOLATED(NEUTRAL) side GND or never measure with a measuring apparatus measure with a measuring apparatus ( oscilloscope, etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND at the same time. If the above precaution is not respected , a fuse or any parts will be broken.

Since the circuit diagram is a standard one, the circuit and circuit constants may be subject to change for improvement without any notice.

NOTEDue improvement in performance, some part numbers show in the circuit diagram may not agree with those indicated in the part list.When ordering parts, please use the numbers that appear in the Parts List.

Type

MM :Metalized mylar capacitorPP :Polypropylene capacitorMPP :Metalized polypropylene capacitorMF :Metalized film capacitorTF :Thin film capacitorBP :Bipolar electrolytic capacitorTAN :Tantalum capacitor

(3)Coils

No unit :[ µH]

Others :As specified

:[M ]

Capacitance value

1 or higher :[pF]less than 1 :[µF]

Withstand voltageNo indication :DC50[V]

Others :DC withstand voltage [V]

AC indicated :AC withstand voltage [V] Electrolytic Capacitors

47/50[Example]:Capacitance value [µF]/withstand voltage[V]

No indication :Ceramic capacitor

AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPBQ802 D

8Vp-p(H) 1.7Vp-p(H) 0.7Vp-p(H) 1.4Vp-p(H)

0.7Vp-p(H) 0.8Vp-p(H) 0.9Vp-p(H) 2Vp-p(H)

2Vp-p(H) 2Vp-p(H) 1Vp-p(H) 450Vp-p(H)

0.6Vp-p(V) 4.8Vp-p(V) 0.5Vp-p(V) 1.2Vp-p

35Vp-p(H) 35Vp-p(H) 35Vp-p(H)

IC401 6pin IC050 6pin IC050 17pin

IC401 17pin

IC901 9pinIC901 8pinIC901 7pin

IC501 34pinIC701 9pinIC401 47pin IC701 1pin

Q605 CIC401 40pin

IC401 29pin IC401 19pin

IC401 20pin

IC401 30pin

IC401 21pin

MAIN PWB

CRT SOCKET PWB

WAVEFORM DIAGRAMS

Page 41: JVC AV-28BT7Exx

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CONTENTSSEMICONDUCTOR SHAPES 2-2

BLOCK DIAGRAMWAVEFORM DIAGRAMS

2-3

2-4

CIRCUIT DIAGRAMS2-52-72-92-92-9

PATTERN DIAGRAMS

VOLTAGE TABLES

MAIN PWB CIRCUIT DIAGRAMMULTISOUND PWB CIRCUIT DIAGRAMCRT SOCKET PWB CIRCUIT DIAGRAMFRONT CONTROL PWB CIRCUIT DIAGRAMFRONT AV + HEADPHONE JACK PWB CIRCUIT DIAGRAM

MAIN PWB PATTERNMULTISOUND, CRT SOCKET & FRONT CONTROL PWB PATTERNFRONT AV + HEADPHONE JACK PWB PATTERN

2-112-13

2-15

SEMICONDUCTOR SHAPESTRANSISTOR

BOTTOM VIEW FRONT VIEW TOP VIEW

CHIP TR

ICBOTTOM VIEW FRONT VIEW TOP VIEW

CHIP IC

TOP VIEW

1 N

N1

OUT

E

ININ OUTE

1 N

N

1

N

N

N

1

N

ECB

E C B

C

B EB C E

(G)(D)(S) E C BE C B

2-13

TV

-TE

XT

CO

NT

RO

LLE

RS

DA

555

X

PLL

TU

NE

RU

V13

15/6

SE

RV

ICE

CO

NN

EC

TOR

CT

I &C

OM

B F

ILT

ER

SP

EA

KE

RS

8R 6

/12W

RG

B A

MP.

TD

A 6

108

8R 6

/12W

I2C

AU

DIO

OU

TP

UT

ST

DA

2615

/6T

DA

2614

(MO

NO

)

SM

PS

(Mc4

4604

)

NV

MK

EY

PAD

VID

EO

SW

ITC

HT

EA

6415

VE

RT

ICA

LO

UT

PU

T T

DA

8351

/6H

OR

IZO

NTA

LO

UT

PU

T

FB

T

CR

T

IR.

FR

ON

TAV

115/

150V

DC

+12

VD

CA

ud.

-12V

DC

Aud

.12

VD

C8V

DC

5VD

C3.

3V s

t-by

2.5V

st-

by

SC

AR

T1

SC

AR

T2

SV

HS

VID

EO

PR

OC

ES

SO

RT

DA

884

X

MS

P 3

4X0D

DIG

ITA

L S

OU

ND

PR

OC

ES

SO

R

BLOCK DIAGRAM

Page 42: JVC AV-28BT7Exx

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CIRCUIT DIAGRAMS

MAIN PWBVE-20073447(AV28BT7EES/EEB) VE-20073586(AV28BT7ENS/ENB) VE-20071473(AV28BT7EPS/EPB)

MAIN PWB CIRCUIT DIAGRAM

Page 43: JVC AV-28BT7Exx

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MULTISOUND PWB CIRCUIT DIAGRAM

MULTISOUND PWBVE-20078991(AV28BT7ENS/ENB, AV28BT7EES/EEB)VE-20079020(AV28BT7EPS/EPB)

Page 44: JVC AV-28BT7Exx

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CRT SOCKET PWB CIRCUIT DIAGRAM

FRONT AV + HEAD PHONE JACK PWB CIRCUIT DIAGRAM FRONT CONTROL PWB CIRCUIT DIAGRAM

CRT SOCKET PWBVE-20074437

FRONT AV + HEAD PHONE JACK PWB VE-20083646

FRONT CONTROL PWBVE-20001612

Page 45: JVC AV-28BT7Exx

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FRONT

Page 46: JVC AV-28BT7Exx

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TOP

TOP

TOP

FRONT

Page 47: JVC AV-28BT7Exx

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VOLTAGE TABLESMAIN PWB IF PWB

CRT SOCKET PWB

IC050

IC401

PIN NO.12345678910

PIN NO.12345678910111213141516171819202122232425262728

PIN NO.123

PIN NO.456

PIN NO.29303132333435363738394041424344454647484950515253545556

PIN NO.11121314151617181920

E(D) C(S) B(G)Q055 2.4 7.8 3.0Q100 0 12.6 0

0Q501Q503

11.93.3 3.3

02.5

Q512 5.4 3.4 4.8Q514 0 4.8 0Q515 4.8 3.2 2.4Q516 3.2 4.8 2.4Q517 4.5 3.2 2.4Q518 3.2 4.8 2.4Q601Q603

0 00

0.1

Q605 0 ---3.10

Q701 0.1

15.2

0 0.4Q702 0 0 0.6Q802 167 0 0.1Q805 0 0 0.6Q806 0 0 0.6Q807 0 11.5 0

Q809Cathode:11.3VAnode:0VControl terminal:2.4V

Note)Although the symbol numbers of the level drive transistor and level outputtransistor are indicated as Q604 and Q606 on the wiring diagram, the numbersare indicated as Q601 and Q605 on the substrate, respectively. The followingtable shows the silk-printed symbol numbers on the substrate.

VOLTAGE2.84.52.94.82.93.20

2.97.94.0

VOLTAGE0.33.700

2.53.04.54.56.70.13.77.84.00

3.00

3.75.43.53.13.42.13.53.53.50.13.03.0

VOLTAGE12.511.5

0

VOLTAGE2.612.40.1

VOLTAGE2.42.42.42.40.32.52.54.77.82.85.00.10.93.14.00

3.02.32.34.64.62.03.83.84.32.32.93.3

VOLTAGE3.00

4.02.84.04.04.04.00

3.7

PIN NO.12345678

PIN NO.910111213141516

VOLTAGE12.412.10.10

0.90.10.20.2

VOLTAGE0.82.62.30.23.02.42.62.4

PIN NO.123

VOLTAGE2.1

12.53.3

PIN NO.123

VOLTAGE12.4

07.9

IC501PIN NO.

1234567891011121314151617181920212223242526

PIN NO.2728293031323334353637383940414243444546474849505152

VOLTAGE000

3.33.33.33.30

2.40

3.30.92.40

0.100

2.40.30.10

2.13.33.53.13.1

VOLTAGE000

3.33.33.33.30.50.50

2.40.30.20.30

2.40

3.30

3.33.33.33.33.33.33.3

IC307

PIN NO.1234567891011121314

PIN NO.1516171819202122232425262728

VOLTAGE3.23.24.90

0.12.42.42.20

2.70

2.15.00

VOLTAGE0.10

4.33.03.53.33.33.33.54.50

3.40.10.1

PIN NO.1234567891011121314151617181920212223242526272829303132

PIN NO.3334353637383940414243444546474849505152535455565758596061626364

VOLTAGE2.500

4.900

4.90

4.54.52.42.42.40.10.10.10

4.800000

4.90.10.1000000

VOLTAGE3.73.70

3.73.76.87.86.50

3.63.73.70

3.73.70

3.73.70

3.73.72.63.70

4.90.10.10.10

2.32.30

IC801

IC802

PIN NO.12345

PIN NO.6789

VOLTAGE2.32.3157.50

VOLTAGE45.27.70

7.5

IC701

PIN NO.12345

PIN NO.6789

VOLTAGE0

12.700

-12.6

VOLTAGE0

12.600

IC100

PIN NO.12345

PIN NO.6789

VOLTAGE3.22.93.20

6.0

VOLTAGE0.10.10.10.1

IC901

PIN NO.1234

PIN NO.5678

VOLTAGE0000

VOLTAGE0.10.13.33.3

IC502

PIN NO.1234

PIN NO.5678

VOLTAGE2.42.42.40

VOLTAGE4.92.42.42.4

IC304

IC804 IC805

PIN NO.123

VOLTAGE9.105

IC807

IC301

Q301E(D)4.8

C(S)4.8

B(G)4.1

Page 48: JVC AV-28BT7Exx

AV28BT7ENS / AV28BT7ENBAV28BT7EES / AV28BT7EEBAV28BT7EPS / AV28BT7EPB

Printed in JapanVP 0201DP2080

VICTOR COMPANY OF JAPAN, LIMITEDHOME AV NETWORK BUSINESS UNIT. 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan