JVC AV-29BH11EES, AV-29BH11ENS, AV-29BH11EPS Service Manual

SERVICE MANUAL
COLOUR TELEVISION
AV-29BH11ENS
AV-29BH11EPS

AV-29BH11ENS AV-29BH11EPS AV-29BH11EES

AV-29BH11EES
SPECIFICATIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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SAFETY PRECAUTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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FEATURES・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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MAIN DIFFERENCE LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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SPECIFIC SERVICE INSTRUCTIONS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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SERVICE ADJUSTMENTS ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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PARTS LIST ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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OPERATING INSTRUCTIONSSTANDARD CIRCUIT DIAGRAM ・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・・
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No.52085
Sep. 2002
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V-29BH11ENS
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V-29BH11EPS V-29BH11EES

SPECIFICATIONS

Content
ITEM
Dimensions (WxHxD) 78.4 × 58.2 × 49.3 cm
Mass 46.2 kg
TV RF System B/G B/G, L B/G, D/K, K1
TV Mode PAL PAL / SECAM
Colour System
Teletext System Fastext / Toptext
Stereo System German + NICAM
Tuning System Frequenc y Synthesizer Tuning System
Number Of C H memory position 200 ch
Receiving Frequency
Intermediate Frequency
Colour Sub Carrier Frequency PAL (4.43MHz), SECAM (4.43MHz), NTSC (3.58MHz/4.43MHz)
Aerial Input Terminal 75 Ohm Unbalanced
Power Input AC 220 ~ 240V, 50Hz
Power Consumption 135W(Max.) <4W(Stand- by)
Picture Tube 68cm measured diagonally
High Voltage 28.55kV (in cut-off servic e mode)
Speaker ( 77 ×128 mm Oval type + Tweeter ) ×2
Audio Output 12W + 12W
Input
Output
Input Terminal
Remote Control Unit VE-30015781 (RM-C85) , Battery size:AAA/R03 x 2
Video Mode
VHF (VL) 46.25MHZ ~ 168.25MH z
VHF (VH) 175.25MHz ~ 463.25MHz
UHF 471.25MHz ~ 863.25MHz
CATV B/G : S1-S41 & S75-S79
VIF Carrier 38.9MHz
SIF Carrier
Video 1V(p-p), 75 Ohm
Audio (L/R) 500 mV(rms), H igh Impedance
Video 1 V(p-p), 75 O hm
Audio (L/R) 500 mV(rms), Low Impedanc e
Rear Side
Front Side AV 3 (Video/Audio)
Front Side
Rear Side
AV-29BH11ENS AV-29BH11EPS AV-29BH11EES
PAL / NTSC 3.58 / NTSC 4.43
32.4MHz (6.5MHz)
32.9MHz (6.0MHz)
33.4MHz (5.5MHz)
AV 1 (Video/Audio/RGB)
AV 2 (Video/Audio/S-VHS)
Headphone jack (Stereo mini jack 3.5∅)
AV 1 (Video/Audio)Output Terminal
AV 2 (Video/Audio) (Selected TV, AV1 or AV3)
PAL / SECAM / NTSC 3.58 / NTSC 4.43
B/G : S1-S41 & S75-S79 L : S1-S41&S75-S77
B/G : S1-S41 & S75-S79 D/K : S1-S41
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)
Pin No.
Signal Designation Matching Value AV 1 AV 2
1 AUDIO R output 500mV(r ms) (N ominal),Low impedanc e
2 AUDIO R input 500mV(r ms) (Nominal),High impedanc e
3 AUDIO L output 500mV(rms) (Nominal),Low impedance
4 AUDIO GND
V-29BH11ENS V-29BH11EPS V-29BH11EES
(TV OUT)
○○
(TV OUT)
○○
(TV/LINE OUT)
(TV/LINE OUT)
5 GND (B)
6 AUDIO L input 500mV(rms) (Nominal), High impedance
B-W, 75Ω○
7B input
FUNCTON SW
8
(SLOW SW)
9 GND (G)
10 - NC -
11 G input
12 - NC -
13 GND (R)
14 GND (YS)
15 R / C input
16 Ys input
17 GND(VIDEO output)
18 GND(VIDEO input)
19 VIDEO output
20 VIDEO / Y input
700mV
Low : 0-3V, High : 8-12V, High impedance
B-W
700mV
R : 700mV C : 300mV (
Low : 0 – 0.4, High : 1 - 3V, 75Ω○
1V
1V
, 75Ω○
B-W, 75Ω
P-P)
, 75Ω
S-W
(Negative going sync), 75Ω
S-W
(Negative going sync), 75Ω○
○○
○○
○○
○○
(R/C)
○○
○○
(TV)
(only C)
(TV/LINE OUT)
NC
NC
NC
NC
NC
21 COMMON GND
[
Pin assignment
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SAFETY PRECAUTIONS

1. The design of this product cont ains special hardware, many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identic al to those 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 manufacturer's warranty and will further relieve the manufacturer of responsibility for personal injur y or property damage resulting theref rom.
3. Many electric al and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor c an the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special safety characteristics are identified in the parts list of Service manual. Electrical
components having such features are identified by shading on the schematics and by (!!!!) on the parts list in Service manual. The use of a substitute replacement which does not
have the s ame safety characteristics as the recommended replacement part shown in the parts list of Service manual may 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 repairing.
Some model's power circuit is partly different in the GND. The differenc e of the GND is shown by the LIVE side GND , the ISOLATED(NEUTRAL) side GND and EARTH side GND. Don't short between the LIVE side GND and ISOLATED(NEUT RAL) side GND or EARTH side GND and never measure with a measuring apparatus (oscillosc ope etc.) the LIVE side GND and ISOLATED(NEUTRAL) side GND or EARTH side GND at the same 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 (See ADJUSTMENT OF B1 POWER SUPPLY).
6. The high voltage applied to the picture tube must conform with that specified in Service manual. Excessive high voltage can cause an incr ease in X-Ray emission, arcing and possible component damage, therefore 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 det ermine the caus e by visual inspection (incorrect installation, cr acked or melted high voltage harness, poor soldering, etc.). To maintain the proper minimum level of soft X-Ray emission, components in the high voltage circuitry including the picture tube must be the exact replacements or alternatives approved by the manuf acturer of the complete product.
7. Do not check high voltage by drawing an arc. Use a high voltage meter or a high voltage probe with a VTVM. Discharge the picture tube before attempting meter connection, by connecting a clip lead to the ground frame and connecting the other end of the lead through a 10k 2W resistor to the anode button.
8. When service is required, obser ve the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. W here a short circuit has occurr ed, those components that indicate evidenc e of overheating should be replaced. Always us e the manufactur er's replacement components.
9. Isolation Check
(Safety for Electrical Shock Hazard)
After re-assembling the product, always perf orm an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/audio input and output terminals, Control knobs, metal c abinet, screwheads, earphone jack, c ontrol shafts, etc.) to be sure the product is safe to operate without danger of electr ic al sh oc k.
(1) Dielectr ic Strength Test
The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any expos ed metal part having a return path to the chassis should withstand a voltage of 3000V AC (r.m.s.) for a period of one second.
(. . . . Withstand a voltage of 1100V AC (r.m.s.) to an applianc e
rated up to 120V, and 3000V AC (r.m.s.) to an appliance rated 200V or more, for a period of one second.) This method of test requires a test equipment not gener ally found in the s ervice trade.
(2) Leakage Current Check
Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer dur ing this check.). Using a " Leakage Current T ester", measure the leakage current from each exposed metal part of the cabinet, particularly any exposed metal part having a return path to the chassis, to a known good earth ground (water pipe, etc.). Any leakage c urrent must not exceed
0.5mA AC (r.m.s.). However, in tr opical area, this must not exceed 0.2mA AC (r.m.s.).
"""" Alternate Check Method
Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Use an AC voltmeter having 1000 ohms per volt or more sensitivity in the following manner. Connect a 1500 10W resistor paralleled by a 0.15µF AC-type capacitor between an expos ed metal part and a known good earth ground (water pipe, etc.). Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Any voltage meas ured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). However, in tr opical area, this must not exc eed 0.3V AC (r.m.s.). This corresponds to 0.2mA AC (r.m.s.).
AC VOLTMETER (HAVING 1000 Ω/V, OR MORE SENSITIVITY)
0.15μF AC-TYPE
PLACE THIS PROBE
1500 Ω 10W
GOOD EARTH GROUND
ON EACH EXPOSED METAL PART
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FEATURES

V-29BH11ENS V-29BH11EPS V-29BH11EES
1. It is a remote c ontrolled color television.
2. 200 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 s ystem.
5. It has two Euroconnector s ockets f or external device (such as video recorder, video games, audio set, etc.)
6. Front AV Input available.
7. Stereo s ound systems (German + Nic am) are available.
8. Full function T eletext (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 T V switches itself automatically to stand-by mode.

MAIN DIFFERENCE LIST

MODEL No.
Parts Name
MAIN PWB VE-20101060 VE-20101082 VE-20101061
LABEL
AV-29BH11ENS AV-29BH11EPS AV-29BH11EES
VE-20102005 VE-20101990 (Only ITA)
VE-20101971
VE-20101987 VE-20101985 (Only POL)
F CARTON BOX
INST BOOK VE-50028435 VE-50028433 VE-50028434
VE-50028449 VE-50028445 (Only ITA)
VE-50028438
VE-50028443 VE-50028442 (Only POL)
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SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE
REMOVING THE REAR COVER
1. Remove the 8 screws marked A.
2. Remove the 4 screws marked B.
3. W ithdraw the rear c over toward you.
REMOVING THE MAIN PWB
" Removing the rear cover.
1. Slightly raise the both sides of the chassis by hand and withdraw MAIN PWB back ward.
[CAUTIONS]
If necessary, take off the wire clamp, connectors etc. Be careful enough when developing a main chassis.
REMOVING THE FRONT AV & HEADPHONE BOARD ASS’Y
" Removing the rear cover. " Removing the MAIN PWB.
1. Remove the 2 screws marked C, and remove the FRONT AV &
HEADPHONE BOARD ASS’Y.
REMOVING THE FRONT CONTROL PWB
"
Removing the rear cover.
" Removing the MAIN PWB.
1. Remove the 3 screws marked D, and remove the FRONT
CONTROL PWB.
CHECKING THE PW BOARD
To check the back side of the PW Board.
1) Pull out the PW Board. (Refer to REMOVING THE MAIN PWB).
2) Erect the PW Board vertically so that you can easily check the back side of the PW Board.
[CAUTION]
" When er ecting the PW Board, be careful so that there will be no
contac ting with other PW Boar d.
" Before turning on power, make sure that the wire connector is
properly connected.
" When conducting a check with power supplied, be sure to confirm
that the CRT EARTH WIRE (BRAIDED ASS’Y) is connected to the CRT SOCKET PW board.
WIRE CLAMPING AND CABLE TYING
1. Be sure t o clamp the wire.
2. Never remove the cable tie us ed for tying the wires together. Should it be inadvertently removed, be sure to tie the wires with a new cable tie.
REMOVING THE WOOFER and TWEETER
" Removing the rear cover.
1. Remove the 4 screws marked E, and remove the WOOFER.
2. Remove the 2 screws marked F, and remove the TW EETER.
3. Remove an opposite side similarly.
REMOVING THE MAIN SWITCH
" Removing the rear cover. " Removing MAIN PW B.
1. Remove the 2 screws marked G, and remove the MAIN SWITCH.
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