JVC AV-2104EE/SK, AV-2124EE/SK, AV-2134EE/SK Service Manual

E
E
E
SERVICE MANUAL
COLOUR TELEVISION
AV-2134E AV-2124E AV-2104E
BASIC CHASSIS
AV-2134EE/SK AV-2124EE
AV-2104EE/SK
[AV-2134EE] [AV-2104EE]
CG
/SK
[AV-2124EE]

CONTENTS

!
SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
!
SAFETY PRECAUTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
!
FEATURES
! HOW TO IDE NTI FY MODELS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
!
FUNCTIONS・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
!
MAIN DIFFERENCE LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
!
SPECIFIC SERVICE INSTRUCTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
!
SER VICE ADJU STMENTS
!
P ART S LI ST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
OPER ATING INSTRUCTIONSSTANDARD CIRCUIT DI AGRAM ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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COPYRIGHT © 2002 VICTOR COMPAN Y OF JAPAN, LTD.
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No. 51959
Mar. 2002
A
V-2134EE
A
A
V-2124EE V-2104EE

SPECIFICATIONS

ITEM
Dimens ions(W×H×D) Mass
TV RF S ys tem B/G,I, D/K,
RF Mode
Colour System
Pi cture Tube
High V o l t a g e
Receiving
Intermediate Frequency
Colour Sub Carrier Fr eque ncy
VIDEO Mode
VHF (VL) 46.25MHz168. 25MHz
VHF (VH) 175.25MHz463. 25MHz
UHF 47 1.25MHz863.25MHz
CATV
VIF Carrier 3 8.0MHz
SIF Carrier
598mm×468mm×478mm 21kg
PAL / SECAM PAL / SECAM
NTSC3.58 / NTSC4.43 Visible size: 51cm measured
diagonally
26.5kV±1.5 k V( at z er o bea m current)
Cable T Vs of Mid (X-Z, S1-S10) Su per ( S11- S 2 0) & H y p er ( S2 1­S41) bands receivable
32.5MHz(5.5MHz)
33.5MHz(4.5MHz)
31.5MHz (6.5MHz)
32.0MHz (6.0MHz) PAL (4.43MHz),
SECAM(4.40625MHz/4.25MHz) NT SC (3 .58MHz / 4.4 3MHz )
AV-21 34EE
/SK
CONTENT
AV-21 24EE
497mm×454mm×478. 5mm 598mm×468mm×471. 5mm
/SK
AV-21 04EE
24kg
/SK
Pow er I nput Ra ted Volt age AC220240V, 50 / 60Hz AC110240V, 50 / 60Hz Pow er Cons um ption 90W (Max) / 60W(Avg) 105W (Max) / 68W(Avg)
Speaker 5cm×12 c m, Oval type×25cm×9 cm, Oval ty pe×15cm×12 cm, Oval type×2
Aud i o Out put 3W (monaural) 5W (monaural)
Aer i al In put Terminal 75Ω Unbalanced
Input Vi de o 1V( p- p ), 75 Ω (Front / Rear)
5 00mV (rms) (- 4dBs), Hi gh
Audio
Outp ut Vi de o 1V( p- p ), 75Ω
Audio
Headphone jack Re m o te Control Unit
impedanc e, RCA×2 (Front / Rear)
500mV(rms) (-4dBs), Low impedanc e,
RCA×1 3 .5 mm mi ni jack
RM-C364GY (Battery size : AA / R06 / UM-3
2)
×
Design and specifications are subject to change w ithout notice.
2
No. 51959
A
A
A

SAFETY PREC AUTIONS

V-2134EE V-2124EE V-2104EE
1. The design of this product contains special hardware, many circuits and components specially for safety purposes. For continued prot ection, no changes should be made to the original design unless authorized in writing by the manufact urer.
Replacement parts must be identical to thos e used in the original circuits. Service should be performed by qualified personnel only .
2. Alterations of the design or circuitry of the products should not be made. Any design alterations or additions will void the manufact urer's warranty and will further relieve the manufacturer of r es p onsi bil i ty for per sona l inj ur y or p r op er t y dam age r es ul t in g therefrom.
3. Many electrical and mechanical parts in the products have special safety-related cha ra cteristics. T hese ch aracteristics are often not e v i den t fr om v i sual i ns p ec ti on n or c a n the pr o tec tio n affor ded by them nec e s sar i l y b e ob tai ned by u s in g r ep l ac em en t com ponent s ra t ed for hig her vo l tag e, w at t ag e, etc . R ep l ac em en t parts which have these special safety charact eristics are
identified in the parts list of Service manual. Electrical
com ponents having such featur es are identified by sha di ng on t he sche matic s and by (!!!! ) on the parts list in Service manua l. The us e of a substitute replacemen t which do es n ot
have the same safety characteristics as the recommended r epl ac em ent par t s h ow n i n th e p ar t s li st of Ser v i ce m anual m ay
cause shock, fire, or other hazards.
4. Don't short between the LIVE side ground and ISOLATED
(NEUTRAL) side ground or EARTH side ground when repa iring.
Some model's power circuit is partly different in the GND. The difference of the G ND is shown by the LIVE : (") side GND, the ISO LAT E D(N EU TR AL) : ( #) si de G ND and EAR TH : ( $) side GND. Don't short between the LIVE side GND and
ISOLATED(NEUTRAL) side GND or EARTH side GND and n ev er m ea sur e wit h a m ea sur i ng appar atus (os ci l lo s cope et c. ) th e LIVE si de GN D an d ISOLA TED(NE UTRAL) side G ND or EAR TH side GND at the same time. If above no te will no t be kept, a fuse o r any parts will be bro k en.
5. If any repair has been made to the chassis, it is recommended that t he B1 set ting should be checked or adjusted (See ADJUSTMENT OF B1 POWER SUPPLY).
6. The hi gh v ol ta ge app lie d t o th e pi c tu r e t u be mu s t c on for m w it h th at sp ecified in S ervice manual. E xcessive h igh vo lt age ca n
cause an increase in X-Ray emission, arcing and possible component damage, t herefore operation under excessive high voltage conditions should be kept to a minimum, or should be prevented. If severe arcing occurs, remove the AC power
immediately and determine the cause by visual inspection (incorrect in stallat ion, cr acke d or m elte d high voltage harness, p oor s o ld er i ng, etc.) . To m ai nt ai n the proper mi n im u m l e v el of sof t X- Ray em ission, c ompon ents i n the high voltage ci rcuitry including the pict ure tube must be t he exact r epl acements or
alternatives approved by the manufacturer of the complete product.
7. Do not chec k high voltage by drawing an arc. Use a high voltage meter or a high v oltag e pr obe wit h a VTVM . Di scha rge the picture tube before attempting meter connection, by c onnecting
a cl i p le ad to t h e gr ou nd f ra me a nd c onn ec ti n g t h e oth er end of t he le ad through a 10kΩ 2W resi s to r to the an od e butt on .
8. W hen s e r vic e is r equ ir e d, obser v e th e or i gi na l l ea d dr es s. E x tr a pr ecaut i on sh ould be give n t o ass ur e c or r ect l ead dres s in th e high voltag e cir cuit area. W her e a short ci rcui t has occu rr ed, th os e comp onent s tha t indi c a te evi de nc e of ov e r heat i ng shoul d
be replaced. Always use the manufacturer's replacement components.
9. Is olation Check
(Safety for Electr ical Shock Hazard)
After re-ass embling the product, always perform an isolat ion check on the exposed metal parts of the cabinet (antenna
terminals, video/audio input and output terminals, Control knobs, m etal c abi n et, sc r ewhead s, ea r ph one j ac k, c on tr ol s haf ts , et c. ) to be sure th e pr oduct is s af e to operate without d anger of el ectri c al shoc k.
(1) Diele ctric Stre ngth Test
The is o l ati on bet ween the AC pr im a ry c i rcu i t and all me t al part s exposed to the user, particularly any exposed metal part having a r etu rn pat h to the chas s is s ho ul d wi thst an d a v ol t age of 3 000 V A C (r.m.s.) for a perio d o f on e second.
( . . . . W iths tand a v o lt age of 110 0V A C ( r .m. s .) to an ap pl i anc e
r ate d up t o 12 0V, an d 3 000V AC ( r .m. s .) t o an appl i an c e r ated 200V or m ore , for a period of one s econd. ) This method of test requires a test equipment not generally found in the service trade.
(2) L eakage Curr ent Check
Plug the AC line c ord directly into the AC outlet (do not use a line isolation transf ormer during this check.). Using a "Leakage
Current Tester", measure the leakage current from each exposed metal part of the ca bine t, particu larly any e xpos ed metal part having a return path to the chassis, to a known good earth gr ou nd (w a ter pi pe, e tc .) . A n y l eak a ge c ur r en t m ust n ot e x c eed
0 .5m A AC (r.m.s. ). However, in tropical area, this must not exceed 0.2mA AC (r.m.s.).
"
" Alternate Check Method
""
Plug the AC line c ord directly into the AC outlet (do not use a line isolation tran sformer dur ing t his che ck.). Use an AC voltmeter
havi ng 100 0 ohms per volt or more sens itivity in the fo llowi ng m ann er . C on nec t a 1500 10W res ist or par a lleled by a 0 . 1 5µF
AC - ty pe c apa citor bet we en an ex po s ed met al pa rt and a known good earth gr oun d (wa ter pipe , etc.) . Meas ure th e A C voltage across the res istor with the AC voltmeter. Move the resistor connec ti on to each ex p osed met al par t, parti c ul ar l y any exposed
m etal p ar t hav i n g a r eturn pat h to t he c h as si s , an d m eas u r e the AC vol tage ac ro s s t he r es ist or . N o w , re v er se t h e pl u g i n th e A C outlet and repeat eac h measurement. Any voltage measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA A C (r.m.s.).
Howeve r, in tropica l are a, this mu st n ot exce ed 0 .3V AC ( r .m.s .). This c orrespo nds to 0.2mA A C (r.m.s .).
AC VOL TM ETE R (HAVING 1000 Ω /V, OR MORE SENSI TIVITY)
0.15μF AC-TYPE
PL ACE THI S PRO BE
1500 10W
G OOD E AR TH GR O UN D
ON EACH EX POSED MET AL PA RT
No.51959
3
A
V-2134EE
A
A
V-2124EE V-2104EE

FEATURES

"
New chassis design enables us e of an interactive on-screen control.
"
Wide range voltage (110V 240V) A C power input (AV-2104E E
" With AUDIO / VIDEO INPUT & OUTPUT terminal. "
MUTING but ton can reduce the audio level to zero instantly.
" Functional remote control to operate T V set (for channel select, volume control, power ON/OFF, etc. ) from a distanc e. "
I2C bus control utilizes single chip ICs for IF, V/C, DEF. VSM PRESET, PRESET & TURBO TIMER.
" By means of AUTO PROGRA M, the TV stations c an be s elected automatically and the TV channels can also be rearranged automatically. " Built-in AI ECO (EC ONOMY, ECOLOGY) sensor.
In ac cord anc e wi th t h e br ig htness i n a r oo m, t h e br ig htness and / of c on tr as t of the pic tur e c an be adjus ted autom at icall y to mak e the op ti mu m pi ct u re w hi ch is eas y on th e ey e.
"
Built-in ON TIMER, RET URN + & CH IL D LOCK.
SYSTEM BLOCK DIAGRAM
/SK
).
IC702
MEMORY
SCL2/SDA2
IC701
MICRO
COM PUTER
IC301
VIDEO/CHROMA
DECORDER
SCL1/SDA1
TU001
TUNER

HOW TO IDENTIFY MODELS

The difference betwe en the m odels with and w i thout “SK” at the end of the model number is given below .Plea se refer to the fo llowing list for ide ntifi cation of the models.
Alth ough the number of the main ci rcui t boa r ds a r e written differently, the m odels are the same from the view poi nt of c i r cuit.
!
Part N ame / Item
MANUAL No.
MAIN PW B
!
FRONT CABINET
Model Name
AV-2134EE/SK AV-2124EE/SK AV-2104EE/SK
AV-2134EE AV-2124EE AV-2104EE
No.51959 No.51858 No.51893 No.51857
SCG-1310A-H2 SCG-1311A-H2 SCG-1027A-H2 SCG-1293A-H2
SCG-1312A-H2 SCG-1306A-H2
LC11129-013A-HK GG10048- 008A-HK GG10129-011A-HK LC11129-005A-H GG10048- 009A-H
!
RATING LABLE
GG20014-007A-H GG20014-007A-H LC20377-015A-H GG20014- 005A-H
GG20014- 005A-H
LC20377-009B-H
GG10056- 042B-H GG10056-063A-H GG10044- 025A-H
PACKING CAS E
4
GG10056- 042A-H
No. 51959
A
A
A

FUNCTIONS

FRON T PANEL
[AV-2134EE/SK] [AV-2104EE/SK]
[AV-2124EE/SK]
MENU buttons
CHANNEL -/+ buttons
VO LUME -/+ butto ns
ECO sensor
REMOTE CONTROL sensor
ON TI MER lamp
PO WE R lam p
MAIN POWER button
A/V INPUT terminal
HEAD PHONE jack
V-2134EE V-2124EE V-2104EE
REAR TERMINAL
[AV-2124EE/SK]
② ③ ④⑤ ⑦⑧⑨①
ANT Terminal
VIDEO INPUT Terminal
VIDEO OUTPUT Terminal
AUDIO INPUT Terminal AUDIO OU T PUT Terminal
No. 51959
5
A
V-2134EE
A
A
V-2124EE V-2104EE
R E MOT E CONTROL UN I T( RM - C36 4 G Y )
ECO SENSOR key
SO UND SYSTE M key
COLOUR SYSTE M key TV/VIDEO key
OFF TIMER key
CHANNEL SCAN key RETURN+key
DISPLAY key
CHANNEL -/ key
POWER key
PI CTURE MODE key
Number (CH.) key ⑬ -/--key
MUTING key MENU key MENU ▲ /▼ key MENU - /+ key
VO LUME-/ key

MAIN DIFFEREN CE LIST

!
Part N ame / Item
MAIN PWB SC G-1310A-H2 SCG-1 311 A-H2 SC G-1312A-H2
!
POWER CORD QMPR340-165-K2 QMP40D0-200J5
!
FR ON T CA BIN ET L C11129-01 3A-H K GG1 00 48 -0 08A-HK GG 1 01 29 -0 11A -HK
!
REAR COVER GG10130- 005A-HK GG10049-002A-HK GG10130- 005A-HK PWB STOPPER CM48144 -002- H DEG COIL Q QW0124-001 QQW0125-001 POWER KNOB GG30019- 001B-H GG30005-001B-C GG30019- 001B-H
CONTROL KN OB GG20006- 001A-H GG20002-001B-C GG20006- 001A-H
!
RATING LABLE GG20014- 007A-H GG20014-007A-H LC20377-015A-H PACKING CASE GG10056- 042B-H GG10056-063A-H GG10044- 025A-H
Model Name
AV-2134EE/SK AV-2124EE/SK AV-2104EE/SK
6
No. 51959
A
A
A

SPECIFI C SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE
REMO VI NG THE REAR CO VE R
1. Unplu g t he po we r plug.
####
!!!!
.
and a
2. As sh own in f igur e, rem ove t he 7 screws marked
sc rew marked "
3. Withdraw the rear cover toward you.
".
""
REMO VI NG THE MAIN PW BO ARD
" After removin g t he rear cover.
1. Slight ly raise the both sides of the MAIN PW Board by hand and remov e the PWB stopper of MA IN PW Board.(only AV-
/SK
2104EE
2. Withdraw the MAIN PW Board backward. ( If nec ess ar y , tak e off the w ire c l am p, c onn ec t or s etc . )
)
REMO VI NG THE SP EAKE R
"
After re moving the rear co v er.
1. As shown in figure, remove the 2 screws marked
2. Follow the same steps when removing the other hand speak er.
V-2134EE V-2124EE V-2104EE
CHECKING TH E MAIN PW BOARD
1. To check the back side of the PW Board.
1) Pull out the MAIN PW Board. (Refer to REMOVING THE MAIN PW Board)
2) Er ect th e PW Boar d ve rt icall y so t h at y ou ca n easi l y check th e back side of the PW Board.
[CAUTION]
" When erecting the PW Board, be careful so that there will be no
contac ting with o ther PW Board.
" Before turning on power, make sure that the CRT earth wire and
other connector are properly c onnected.
WIRE CL AMPING AND CABLE TYING
1. Be sure to clamp the wire.
2. Never remove the c able tie used for tying the wires together. Should it be inadvertently removed, be sure to tie the wires with a
new cable tie.
No. 51959
7
A
V-2134EE
A
A
V-2124EE V-2104EE
FRONT CABI.
SPEAKER
C
CRT SOCK ET
PWB
MAIN PWB
(×××× 2)
SPEAKER
POWER
CORD
××××
(
2)
C
PW B STOP PER
[ On ly AV -2 10 4EE /SK ]
REAR
COVER
B
(×××× 1)
A
(××××7)
8
No. 51959
A
A
A
DISASSEMBLY PROCEDURE
REMO VI NG THE REAR CO VE R
4. Unplu g t he po we r plug.
%.
%%
!!!!
and a
5. As sh own in f igur e, rem ove t he 5 screws marked
sc rew marked "
6. Rem ov e the b ack bo ar d an d r e mo v e the pow er c ord fro m t h e rear c over.
7. Withdraw the rear cover toward you.
"and a screw marked $$$$.
""
REMO VI NG THE MAIN PW BO ARD
" After removin g t he rear cover.
3. Slight ly raise the both sides of the MAIN PW Board by hand and remove the PWB stopper of MAIN PW Board.
4. Withdraw the MAIN PW Board backward. ( If nec ess ar y , tak e off the w ire c l am p, c onn ec t or s etc . )
REMO VI NG THE SP EAKE R
" After removin g t he rear cover.
3. As shown in figure, remove the 2 screws marked %
V-2134EE V-2124EE V-2104EE
CHECKING TH E MAIN PW BOARD
2. To check the back side of the PW Board.
3) Pull out the MAIN PW Board. (Refer to REMOVING THE MAIN PW Board)
4) Er ect th e PW Boar d ve rt icall y so t h at y ou ca n easi l y check th e back side of the PW Board.
[CAUTION]
" When erecting the PW Board, be careful so that there will be no
contac ting with o ther PW Board.
" Before turning on power, make sure that the CRT earth wire and
other connector are properly c onnected.
WIRE CL AMPING AND CABLE TYING
3. Be sure to clamp the wire.
4. Never remove the c able tie used for tying the wires together. Should it be inadvertently removed, be sure to tie the wires with a
new cable tie.
No. 51959
9
A
V-2134EE
A
A
V-2124EE V-2104EE
FRONT CABI.
CRT SOCK ET
PWB
SPEAKER
REAR
COVER
MAIN PWB
HVT
D
××××
(
2)
PW B STOP PER
C
B
BACK BOARD
A
(××××5)
POWER
CORD
10
No. 51959
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