JVC AV-29W33 Schematic

SERVICE MANUAL

COLOR TELEVISION

AV-29WS3

BASIC CHASSIS

AV-29WS3

POWER

MUTING

SYSTEM

CINEMA

COLOUR SOUND

SURROUND

ECO

SENSOR

DISPLAY

I/II

TV/TEXT

TV/VIDEO

123

OFF

TIMER

456

PICTURE MODE

789

CHANNEL

RETURN+

SCAN

0-/

VOLUME

CHANNEL

TEXT

REVEAL

INDEX

HOLD

SIZE

SUBPAGE CANCEL

STORE MODE

RM-C1010

RM-C1010-1H

a SPECIFICATIONS ....................................................................................................................................2

a OPERATING INSTRUCTIONS (APPENDIX)

a SAFETY PRECAUTIONS ........................................................................................................................3

a FEATURES ..............................................................................................................................................4

a FUNCTIONS .............................................................................................................................................5

a SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................6

a SERVICE ADJUSTMENTS ....................................................................................................................14

a STANDARD CIRCUIT DIAGRAM (APPENDIX) .................................................................................. 2-1

a PARTS LIST ...........................................................................................................................................41

No. 52081 Dec. 2002

AV-29WS3

SPECIFICATIONS

Items Contents

Dimensions (W × H × D)

Mass 45kg

TV RF System B, G, I, D, K, K1, M

Color System TV Mode PAL / SECAM / NTSC3.58 / NTSC4.43

VIDEO Mode PAL / SECAM / NTSC3.58 / NTSC4.43

Stereo system A2/NICAM (B / G, I, D / K) System

Teletext system FLOF(Fastext), WST(World Standard Text)

Receiving Frequency VHF (VL) 46.25MHz – 140.25MHz (AS0 – S6)

VHF (VH) 147.25MHz – 423.25MHz (S7 – S36)

UHF 431.25MHz – 863.25MHz (S37 – CHINA 57)

CATV ● Cable TVs of Mid (X-Z, S1-S10)

Intermediate VIF Carrier 38.0MHz

Frequency 31.5MHz (6.5MHz)

SIF Carrier 32.0MHz (6.0MHz)

Color Sub Carrier PA L 4.43MHz

Frequency SECAM 4.40625MHz / 4.25MHz

NTSC 3.58MHz / 4.43MHz

Aerial Input Terminal 75Ø Unbalanced, coaxial

Power Input AC110V – AC240V, 50Hz / 60Hz

Power Consumption 175W

Picture Tube Visible size : 68cm measured diagonally

High Voltage 32.0kV +1kV/ – 1.5kV (at cut-off in service mode)

Speaker 6.5cm × 13cm Oval type ×2

Audio Output 7W + 7W

Video / Audio Input Video (1 / 3) 1V(p-p), 75Ø, RCA pin jack ×2

(1 / 2 / 3) Audio (1 / 2 / 3) 500mV(rms) (-4dBs), High impedance, RCA pin jack ×6

S-Video Mini DIN4-pin ×1 (Input 1 Over)

Component Input Y : 1V(p-p), positive (negative sync provided), 75Ø, RCA pin jack ×1 (Input 2)

Video / Audio Output Video 1V(p-p), 75Ø, RCA pin jack ×1

Audio 500mV(rms)(-4dBs), Low impedance (400Hz when modulated 100%), RCA pin jack ×2

Headphone Jack Stereo mini jack (φ3.5mm)

Remote Control Unit RM-C1010-1H (Battery size: AA/R06/UM-3 × 2)

81.2cm × 58.42cm × 51.8cm

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

32.5MHz (5.5MHz)

33.5MHz (4.5MHz)

(Max.)

/ 116W

(Avg.)

Y:1V(p-p), positive (negative sync provided), 75Ø

C:0.286V(p-p) (burst signal), 75Ø

CB/CR : 0.7V(p-p), 75Ø, RCA pin jack ×2

Design & specifications are subject to change without notice.

2No. 52081

SAFETY PRECAUTIONS

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

PLACE THIS PROBE ON EACH EXPOSED METAL PAR T

1500Ω 10W

0.15µF AC-TYPE

GOOD EARTH GROUND

1. The design of this product contains 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 identical 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 injury or property damage resulting therefrom.

3. Many electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can 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 same 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 (NEU-

TRAL) side ground or EARTH side ground when repairing.

Some model's power circuit is partly different in the GND. The difference 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 (NEUTRAL) side GND or EARTH side GND and never measure the LIVE side GND and ISOLATED (NEUTRAL) side GND or EARTH side GND at the same time with a measuring apparatus (oscilloscope etc.). 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 increase 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 determine the cause by visual inspection (incorrect installation, cracked 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 manufacturer of the complete product.

AV-29WS3

8. When service is required, observe the original lead dress. Extra precaution should be given to assure correct lead dress in the high voltage circuit area. Where a short circuit has occurred, those components that indicate evidence of overheating should be replaced. Always use the manufacturer's replacement components.

9. Isolation Check

(Safety for Electrical Shock Hazard)

After re-assembling the product, always perform an isolation check on the exposed metal parts of the cabinet (antenna terminals, video/ audio input and output terminals, Control knobs, metal cabinet, screw heads, earphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.

(1) Dielectric Strength Test

The isolation between the AC primary circuit and all metal parts exposed to the user, particularly any exposed 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 appliance 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 generally found in the service trade.

(2) Leakage Current Check

Plug the AC line cord directly into the AC outlet (do not use a line isolation transformer during this check.). Using a "Leakage Current Tester", 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 current must not exceed 0.5mA 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 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 1500Ø 10W resistor paralleled by a 0.15µF AC-type capacitor between an exposed 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 measured must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5mA AC (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.).

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 10kØ 2W resistor to the anode button.

No. 52081 3

AV-29WS3

FEATURES

s New chassis design enables use of an interactive on-screen control. s Pure flat CRT produces fine textured picture in every detail. s Wide range voltage (110V ~ 240V) for AC power input. s With AUDIO/VIDEO/COMPONENT input terminals.

C bus control utilizes single chip ICs.

s I s By means of AUTO PROGRAM, the TV stations can be selected

automatically and the TV channels can also be rearranged automatically.

s Built-in DIGITAL ECO MODE (ECONOMY, ECOLOGY).

In accordance with the brightness in a room, the brightness and/or contrast of the picture can be adjusted automatically to make the optimum picture which is easy on the eye.

s Built-in OFF TIMER & RETURN +.

4No. 52081

FUNCTIONS

L/MONOVR

IN (VIDEO-3)

a FRONT PANEL

a REAR PANEL

COMPONENT

VIDEO-1

(

)

VIDEO-2

INPUT

OUTPUT

INPUT

AV-29WS3

OVER

MONO

RRC

MONO

a REMOTE CONTROL UNIT [RM-C1010-1H]

MUTING

SYSTEM

COLOUR SOUND

DISPLAY

I/II

TV/VIDEO

OFF

TIMER

PICTURE

MODE

CHANNEL

RETURN+

SCAN

CHANNEL

REVEAL

HOLD

SUBPAGE CANCEL

STORE MODE

POWER

CINEMA

SURROUND

ECO

SENSOR

TV/TEXT

123

456

789

0-/

VOLUME

TEXT

SIZE

INDEX

RM-C1010

No. 52081 5

AV-29WS3

SPECIFIC SERVICE INSTRUCTIONS

DISASSEMBLY PROCEDURE

CHECKING THE MAIN PW BOARD

REMOVING THE REAR COVER

1. Unplug the power supply cord.

2. Remove the 16 screws marked

3. Withdraw the Rear cover toward you.

as shown in Fig.1.

1. To check the back side of the Main PWB.

1) Pull out the chassis. (Refer to REMOVING THE CHASSIS).

2) Erect the chassis vertically so that you can easily check the back side of the Main PWB.

[CAUTION]

When reinstalling the rear cover, carefully push it inward after in-

•

serting the Main PWB into the rear cover groove.

REMOVING THE CHASSIS (CHASSIS BASE AND CONTROL BASE)

After removing the rear cover.

•

1. Slightly raise the both sides of the chassis by hand and remove the 2 claws marked ı under the chassis from the front cabinet as shown in Fig.1.

2. Withdraw the chassis backward.

(If necessary, take off the wire clamp, connector’s etc.)

When conducting a check with power supplied, be sure to confirm

that the CRT earth wire is connected to the CRT SOCKET PWB and the Main PWB.

REMOVING THE AV TERMINAL BOARD

After removing the rear cover.

•

1. Remove the 4 screws marked Ç as shown in Fig.1.

2. When you pull out the AV Terminal board in the direction of arrow marked Î as shown in Fig.1, it can be removed.

[CAUTION]

When erecting the chassis, be careful so that there will be no con-

•

tacting with other PW Board. Before turning on power, make sure that the CRT earth wire and

•

other connectors are properly connected. When repairing, connect the Deg. coil to the DEG. connector on the

•

Main PWB.

WIRE CLAMPING AND CABLE TYING

1. Be sure to clamp the wire.

2. Never remove the cable tie used for tying the wires together. Should it be inadvertently removed, be sure to tie the wires with a new cable tie.

REMOVING THE CONTROL BASE

After removing the rear cover and the chassis.

•

1. While pushing down the 2 claws marked ´ as shown in Fig. 2 and pull out the Control base in the direction of arrow marked Ï as shown in Fig. 2, the control base can be removed. (If necessary, take off the wire, connector’s etc.)

REMOVING THE SPEAKER

After removing the rear cover.

•

1. Remove the 2 screws marked ˝ as shown in Fig.1.

2. Withdraw the speaker backward.

3. Follow the same steps when removing the other hand speaker.

6No. 52081

Fig.2

CRT SOCKET PWB

FRONT CONTROL PWB (1/2)

FRONT CONTROL PWB (2/2)

MAIN PWB

CHASSIS BASE

CONTROL BASE

(×4)

(×16)

PICTURE TUBE

REAR COVER

CLAW B

AV TERMINAL BOARD

FRONT CABINET

CHASSIS BASE

(X2)

SPEAKER

CONTROL BASE

[FRONT SIDE]

AV-29WS3

Fig.1

No. 52081 7

AV-29WS3

REMOVING THE CRT

* Replacement of the CRT should be performed by 2 or more persons.

After removing the rear cover, chassis etc.,

•

1. Putting the CRT change table on soft cloth, the CRT change table

should also be covered with such soft cloth (shown in Fig. 3).

2. While keeping the surface of CRT down, mount the TV set on the

CRT change table balanced will as shown in Fig. 4.

3. Remove 4 screws marked by arrows with a box type screwdriver as

shown in Fig. 4. Since the cabinet will drop when screws have been removed, be sure

•

to support the cabinet with hands.

4. After 4 screws have been removed, put the cabinet slowly on cloth

(At this time, be carefully so as not to damage the front surface of the cabinet) shown in Fig. 5. The CRT should be assembled according to the opposite sequence

•

of its dismounting steps.

* The CRT change table should preferably be smaller that the CRT sur-

face, and its height be about 35cm.

CRT CHANGE TABLE

CLOTH

CRT CHANGE TABLE

Fig. 3

CRT

APPROX. 35cm

BOX TYPE SCREW DRIVER

COATING OF SILICON GREASE FOR ELECTRICAL INSULATION ON THE CRT ANODE CAP SECTION.

Subsequent to replacement of the CRT and HV transformer or repair

•

of the anode cap, etc. by dismounting them, be sure to coat silicon grease for electrical insulation as shown in Fig. 6.

1. Wipe around the anode button with clean and dry cloth. (Fig. 6)

2. Coat silicon grease on the section around the anode button. At this

time, take care so that any silicon greases does not sticks to the anode button. (Fig. 7)

夝 Silicon grease product No. KS - 650N

CRT

Anode button

CABINET

Approx. 20mm (Do not coat grease on this section

Fig. 4

CRT

CRT CHANGE TABLE

Fig. 5

Silicon grease should be coated by 5mm or more from the outside diameter of anode cap.

Silicon grease

coating

Fig. 6

8No. 52081

Anode button (No sticking of silicon grease)

Coating position of silicon grease

Anode cap

Fig. 7

REPLACEMENT OF MEMORY IC

AV-29WS3

1. MEMORY IC

This TV uses the following memory IC.

Memory IC: IC1702 on MAIN PW Board

The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, be sure to use the same type IC written with the initial values of data. In other words, use the specific IC listed in “PRINTED WIRING BOARD PA RTS LIST”. For its mounting location, refer to “ADJUSTMENT LOCATIONS”.

2. PROCEDURE FOR REPLACING MEMORY IC

(1) Power off

Switch the power off and unplug the power cord from the wall outlet.

(2) Replacing the memory IC

Replace the memory IC with new one. Be sure to use the memory IC written with the initial data values.

(3) Power on

Plug the power cord into the wall outlet and switch the power on.

(4) Check and setting of SYSTEM CONSTANT SET:

1) Press the DISPLAY key and the PICTURE MODE key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed.(See Fig.1.)

2) In the SERVICE MENU, press the DISPLAY key and PICTURE MODE key simultaneously. Then, the SYSTEM CONSTANT SET screen will be displayed.(See Fig.2.)

3) Check whether the setting values of the SYSTEM CONSTANT SET are the same as those indicated in Table1. If the value is different, select the setting item with the MENU &/^ key, and set the correct value with the MENU

4) Press the DISPLAY key twice to return to the normal screen.

(5) Receive channel setting

Refer to the OPERATING INSTRUCTIONS and set the receive channels (channels preset).

*/T

key.

(6) User setting

Check the user setting values in Table 2, and if setting value is different, set the correct value. For setting, refer to the OPERATING INSTRUCTIONS.

(7) Setting of SERVICE MENU

Ver ify the setting for each setting item in the SERVICE MENU.(See Table 3.) If readjustment is necessary, perform adjustment referring to “SERVICE ADJUSTMENTS”.

SERVICE MENU

1. IF

3. DEF

5. PRESET

7. PLUG & PLAY (ON)

1-7 : SELECT DISPLAY : EXIT

******* **** ***** ***** **** **** *** ***

2. VC

4. VSM PRESET

6. A2NICAM

Fig. 1

SYSTEM CONSTANT-

SYSTEM CONSTANT SET 1

SYSTEM COMB TILT TEXT SUPER BASS LANGUAGE

>? : SEL -+ : OPE

SYSTEM CONSTANT-

SYSTEM CONSTANT SET 2

MSP BILINGUAL B / B SOUND TUNER COLOR AUTO

MULTI YES YES ERCMI YES E/R/C/M/I

DISP : EXIT

YES YES NO MU YES

NAME OF REMOTE CONTROL KEYS

MUTING

SYSTEM

CINEMA

SURROUND

I/II

123

456

789

RETURN+

TEXT

HOLD INDEX

STORE MODE

DISPLAY

PICTURE MODE

COLOUR SOUND

DISPLAY

TV/VIDEO

OFF

TIMER

PICTURE

MODE

CHANNEL

SCAN

CHANNEL

REVEAL

SUBPAGE CANCEL

0-/

VOLUME

POWER

ECO

SENSOR

TV/TEXT

SIZE

>? : SEL -+ : OPE

SYSTEM CONSTANT-

SYSTEM CONSTANT SET 3

LOCK 1 MHz

>? : SEL -+ : OPE

SYSTEM CONSTANT-

SYSTEM CONSTANT SET 4

3D SURROUND 3CH VOL/TONE AMP TUNER

>? : SEL -+ : OPE

500 KHz 250 KHz

156. 25 KHz

31.25 KHz

DISP : EXIT

: 040 : 040 : 040 : 030 : 030

DISP : EXIT

YES YES

DISP : EXIT

III

Fig. 2

No. 52081 9

AV-29WS3

SETTING OF SYSTEM CONSTANT SET

Setting item Setting content

SYSTEM

COMB

TILT

TEXT

SUPER BASS

LANGUAGE

MSP

BILINGUAL

B/B SOUND

TUNER

COLOR AUTO

LOCK 1MHz

500KHz

250KHz

MULTI TRIPLE PAL SINGLE VIET

YES NO

ERCMI ERAPU NO

YES NO

E/R/C/M/I E/R/C E/C

YES NO

MU MA

YES NO

000 240

Setting value

MULTI

YES

ERCMI

E/R/C/M/I

YES

040

156.25KHz

31.25KHz

3D SURROUND

3CH VOL/TONE

AMP TUNER

000 240

YES NO

Table 1

030

YES

10 No. 52081

USER SETTING VALUES

Setting item Setting value

SUB POWER ON

CHANNEL POSITION 1 POSITION

CHANNEL PRESET REFER TO OPERATING INSTRUCTIONS

VOLUME 15 ± 2

TV/VIDEO TV

VNR OFF

COMPRESS (16:9) OFF

AUTO SHUTOFF OFF

CHILD LOCK OFF

BLUE BACK ON

VIDEO-2 SET VIDEO

LANGUAGE ENG

AI VOLUME ON

ON SCREEN DISPLAY POSITION INDICATION

COLOR SYSTEM PAL

SOUND SYSTEM B/G

PICTURE MODE-VSM BRIGHT

OFF TIMER 00

ECO SENSOR OFF

BASS CENTER

TREBLE CENTER

BALANCE CENTER

CINEMA SURROUND OFF

STEREO MODE STEREO

AV-29WS3

Tab le 2

No. 52081 11

AV-29WS3

SERVICE MENU SETTING ITEMS

Service menu Setting item

1. IF 1. VCO

2. DELAY POINT

2. VC 1. CUTOFF(R/G)

2. DRIVE(R/G/B)

3. BRIGHT

4. CONT

5. COLOR

6. TINT

7. SHARP

8. YDELAY

9. AMP T. SHARP

3. DEF 1. VER. SLOPE

2. VER. HEIGHT

3. VER. POSITION

4. VER. SCURVE

5. HOR. POSITION

6. HOR. WIDTH

7. EW-PIN

8. EW-TRAPEZ

9. UP CORNER

10. DW CORNER

11. HOR. PARALL

12. HOR. BOW

13. V. ZOOM

4. VSM PRESET 1. TINT

(BRIGHT/STD/SOFT) 2. COLOR

Do not adjust

3. BRIGHT

4. PICTURE

5. DETAIL

Do not adjust

Service menu Setting item

5. PRESET 1. PSNS

Do not adjust

6. A2NICAM 1. ERROR LIMIT

Do not adjust

2. ACL

3. MUS

4. MAT

5. FCO

6. BPS

7. IFLH

8. VID

9. STM

10. AFCW

11. VSW

12. FFI

13. AGC

14. CL

15. AKB

16. HBL

17. BKS

18. READ STATUS

19. VNR

20. PEAK

21. IVG

22. WPL

23. SOFT CLIPPER

24. IF PLL OFFSET

25. OVERSHOOT

26. HCO

27. HP2

28. AI VOLUME ADN

31. CCCLOOP

2. A2 ID THR

3. SOUND SYSTEM

Table 3

12 No. 52081

PLUG & PLAY(ON)

Do not adjust

REPLACEMENT OF CHIP COMPONENT

CAUTIONS

1. Avoid heating for more than 3 seconds.

2. Do not rub the electrodes and the resist parts of the pattern.

3. When removing a chip part, melt the solder adequately.

4. Do not reuse a chip part after removing it.

SOLDERING IRON

1. Use a high insulation soldering iron with a thin pointed end of it.

2. A 30w soldering iron is recommended for easily removing parts.

REPLACEMENT STEPS

1. How to remove Chip parts

Resistors, capacitors, etc.

(1) As shown in the figure, push the part with tweezers and alter-

nately melt the solder at each end.

AV-29WS3

2. How to install Chip parts

Resistors, capacitors, etc.

(1) Apply solder to the pattern as indicated in the figure.

(2) Shift with tweezers and remove the chip part.

Transistors, diodes, variable resistors, etc.

(1) Apply extra solder to each lead.

SOLDER

(2) As shown in the figure, push the part with tweezers and alter-

nately melt the solder at each lead. Shift and remove the chip part.

SOLDER

(2) Grasp the chip part with tweezers and place it on the solder.

Then heat and melt the solder at both ends of the chip part.

Transistors, diodes, variable resistors, etc. (1) Apply solder to the pattern as indicated in the figure. (2) Grasp the chip part with tweezers and place it on the solder. (3) First solder lead A as indicated in the figure.

(4) Then solder leads B and C.

Note : After removing the part, remove remaining solder from the

pattern.

No. 52081 13

AV-29WS3

SERVICE ADJUSTMENTS

ADJUSTMENT PREPARATION

1. You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment equipment 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 the 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, capacitors, etc.

7. Presetting before adjustment. Unless otherwise specified in the adjustment instructions, preset the following functions with the remote control unit.

User mode setting position

•

Setting item Setting value

PICTURE MODE(VSM) BRIGHT

VNR OFF

BASS, TREBLE, BALANCE CENTER

TINT, COLOR, BRIGHT, DETAIL CENTER

PICTURE MAXIMUM

MEASURING INSTRUMENT

1. DC voltmeter (or Digital voltmeter)

2. Oscilloscope

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

4. Remote control unit

ADJUSTMENT ITEMS

B1 POWER SUPPLY

•

FOCUS ADJUSTMENT

•

IF CIRCUIT ADJUSTMENTS

•

Adjustment of VCO (CW) Adjustment of DELAY POINT (AGC TAKE-OVER)

VC (VIDEO/CHROMA) CIRCUIT ADJUSTMENTS

•

Adjustment of WHITE BALANCE (Low light) Adjustment of WHITE BALANCE (High light) Adjustment of SUB BRIGHT Adjustment of SUB CONTRAST Adjustment of SUB COLORAdjustment of SUB COLORAdjustment of SUB TINTAdjustment of SUB TINT-

ΙΙ

ΙΙ ΙΙΙΙ

ΙΙ

ΙΙΙΙ

ΙΙ

ΙΙ ΙΙΙΙ

ΙΙ

ΙΙΙΙ

DEFLECTION CIRCUIT ADJUSTMENTS

•

Adjustment of V. SLOPE Adjustment of V. POSITION Adjustment of V. HEIGHT Adjustment of H. POSITION Adjustment of H. WIDTH Adjustment of SIDE PIN Adjustment of TRAPEZIUM Adjustment of V. S-CURVE Adjustment of CORNER Adjustment of H. PARALLEL Adjustment of H. BOW

VSM PRESET SETTING

•

PRESET SETTING

•

AUDIO ADJUSTMENT

•

PURITY ADJUSTMENT

•

CONVERGENCE ADJUSTMENTS

•

Adjustment of STATIC CONVERGENCE Adjustment of DYNAMIC CONVERGENCE

14 No. 52081

ADJUSTMENT LOCATIONS

TOP

CRT EARTH

(BRAIDED ASS'Y)

TP-47B

TP-47G

GND B1

UPPER : FOCUS (F1)

MIDDLE : FOCUS (F2)

IC702

CRT SOCKET PWB ASS’Y

(SOLDER SIDE)

FRONT

AV IN/OUT

HVT

MAIN PWB ASS’Y

FRONT CONTROL PWB ASS’Y(1/2) FRONT CONTROL PWB ASS’Y(2/2)

J304 J303 J302

S804

S805

S806 S802

S803S801

J801

CN003

CN002

CN00A

CN001

CN002

POWER SW.

S901

S801 : CH UP + S802 : CH DOWN – S803 : MENU S804 : TV/VIDEO S805 : VOL UP+ S806 : VOL DOWN –

LOWER : SCREEN

TU001

J804J801 J802 J803

IC701

CN001

DEG

TP-E

AV-29WS3

No. 52081 15

AV-29WS3

BASIC OPERATION IN SERVICE MENU

1. TOOL OF SERVICE MENU OPERATION

Operate the SERVICE MENU with the remote control unit.

2. SERVICE MENU ITEMS

With the SERVICE MENU,various settings (adjustments)can be made,and they are broadly classified in the following items of settings:

1.IF ......................................For entering/adjusting the setting values (adjustment values)of the IF circuit.

•

2.VC ....................................For entering/adjusting the setting values (adjustment values)of the VIDEO/CHROMA circuit.

•

3.DEF ..................................For entering/adjusting the setting values (adjustment values)of the DEFLECTION circuit.

•

4.VSM PRESET ..................For setting the values of STANDARD,SOFT and BRIGHT.

•

5.PRESET ........................... For setting the values of the preset.

•

6.A2NICAM .........................For entering/adjusting the setting values (adjustment values)of the multiplicity sound circuit.

•

7.PLUG & PLAY (ON) ......... This is not used for service.

•

3. BASIC OPERATION IN SERVICE MENU

(1) How to enter SERVICE MENU

Press the DISPLAY key and the PICTURE MODE key on the remote control unit simultaneously. The SERVICE MENU screen will be displayed. (See Fig. 1 on the next page.)

(2) Selection of SUB MENU SCREEN

Press one of the keys 1 to 7 on the remote control unit,and select the SUB MENU SCREEN from the SERVICE MENU. (See Fig.1 on the next page.)

(VSM:video status memory)

SERVICE MENU → SUB MENU 1. IF

2. VC

3. DEF

4. VSM PRESET

5. PRESET

6. A2NICAM

7. PLUG & PLAY (ON)

(3) Method of Setting

*Once the setting values are set,they are memorized automatically. *It must not adjust without inputting a signal.

1) 1. IF

[1.VCO ]

(a) 1 Key......................... Select 1. IF.

(b) 1 Key......................... Select 1. VCO.

Under normal conditions, no adjustment is required.

[2.DELAY POINT ]

(a) 1 Key......................... Select 1. IF.

(b) 2 Key......................... Select 2.DELAY POINT.

(d) DISPLAY Key ............ When this is pressed twice, you will return to the SERVICE MENU.

2) 2. VC, 3. DEF, 4. VSM PRESET, 5. PRESET and 6. A2NICAM

(a) 2 ~6 Keys.................. Select one from 2. VC, 3. DEF, 4. VSM PRESET, 5. PRESET and 6. A2NICAM.

(b) MENU &/^ key........ Select setting items.

(d) DISPLAY Key ............ When this is pressed, you will return to the SERVICE MENU.

*/T

Key ........ Adjust the setting value.

*/T

Key ........ Adjust the setting values of the setting items.

•

Use the number keys on the remote control unit for setting of WHITE BALANCE.

•

For the setting, refer to each item concerned.

3) 7. PLUG & PLAY (ON)

This is not used for service.

(4) Release of SERVICE MENU

After completing the setting, return to the SERVICE MENU by pressing the DISPLAY key, then again press the DISPLAY key to return to the normal screen.

16 No. 52081

AV-29WS3

SERVICE MENU

1. IF

3. DEF

5. PRESET

7. PLUG & PLAY (ON)

1-7 : SELECT DISPLAY : EXIT

******* **** ***** ***** **** **** *** ***

2. VC

4. VSM PRESET

6. A2NICAM

SUB MENU 1. IF

1. VCO

2. DELAY POINT

1-2 : SELECT DISPLAY : EXIT

SUB MENU 2. VC

AUTO

V/C

1. CUTOFF

50 Hz

MENU 89: SELECT

(R) (G)

/+: OPERATE

** **

DISPLAY : EXIT

Setting item

1. CUTOFF (R/G)

2. DRIVE (R/G/B)

3. BRIGHT

4. CONT

5. COLOR

6. TINT

7. SHARP

8. YDELAY

9. AMP T.SHARP

VCO (CW)

TOO HIGH ABOVE REFERENCE BELOW REFERENCE TOO LOW

DELAY POINT UHF

AGC TAKE-OVER

/+: OPERATE

MHz

*****

DISPLAY : EXIT

SUB MENU 6. A2NICAM

1. ERROR LIMIT C AD BITS NICAM ERROR

MENU 89: SELECT

/+: OPERATE

DISPLAY : EXIT

Setting item

1. ERROR LIMIT

2. A2 ID THR

3. SOUND SYSTEM

SUB MENU 5. PRESET

PRESET 50Hz

1. PSNS

MENU 89: SELECT

/+: OPERATE

DISPLAY : EXIT

*****

******

PALB/G

MHzA2NICAM

****

1. PSNS

2. ACL

3. MUS

4. MAT

5. FCO

6. BPS

7. IFLH

8. VID

9. STM

SUB MENU 3. DEF

DEF

4 : 3

PAL

1. VER. SLOPE

50Hz

MENU 89: SELECT

/+: OPERATE

DISPLAY : EXIT

SUB MENU 4. VSM PRESET

STANDARD

TINT COLOR BRIGHT PICTURE DETAIL

MENU 89: SELECT

/+: OPERATE

Setting item

10. AFCW

11. VSW

12. FFI

13. AGC

14. CL

15. AKB

16. HBL

17. BKS

18. READ STATUS

19. VNR

** ** ** ** **

DISPLAY : EXIT

1. VER. SLOPE

2. VER. HEIGHT

3. VER. POSITION

4. VER. SCURVE

5. HOR. POSITION

6. HOR. WIDTH

BRIGHT / STD / SOFT

Setting item

1. TINT

2. COLOR

3. BRIGHT

PICTURE

5. DETAIL

20. PEAK

21. IVG

22. WPL

23. SOFT CLIPPER

24. IF PLL OFFSET

25. OVERSHOOT

26. HCO

27. HP2

28. AI VOLUME ADN

31. CCCLOOP

4 : 3 / 16 : 9

Setting item

7. EW-PIN

8. EW-TRAPEZ

9. UP CORNER

10. DW CORNER

11. HOR. PARALL

12. HOR. BOW

13. V. ZOOM

Fig. 1

No. 52081 17

AV-29WS3

ADJUSTMENTS

B1 POWER SUPPLY

Item

Measuring

instrument

Test point Adjustment part Description

Check of B1 POWER

Signal generator

SUPPLY

DC voltmeter

FOCUS ADJUSTMENT

Item

Adjustment of FOCUS

Measuring

instrument

Signal generator

B1 (pin 1) GND (pin 5) [CN00S connector

1. Receive a black and white signal.

2. Connect a DC voltmeter between B1 and GND (between pin 1 and 5 of the connector CN00S).

3. Make sure that the voltage is DC134.5 ± 2V.

in MAIN PWB]

Test point Adjustment part Description

FOCUS VR [In HVT]

Notes:

• Set PICTURE MODE (VSM) to “BRIGHT”.

• The final adjustment of CONVERGENCE must be done after the

FOCUS adjustment. (CONVERGENCE is changed by FOCUS adjustment.) When makes difference by FOCUS adjustment, should be reconfirming PURITY adjustment.

1. Receive a cross-hatch signal.

2. While looking at the screen centre, adjust the FOCUS VR so that the vertical and horizontal lines will be clear and in fine detail.

3. Make sure that the picture is in focus even when the screen gets darkened.

IF CIRCUIT ADJUSTMENTS

Item

Adjustment of VCO (CW)

Adjustment of DELAY POINT (AGC TAKE-OVER)

(AGC TAKE-OVER)

Measuring

instrument

Remote control unit

VCO (CW)

TOO HIGH ABOVE REFERENCE BELOW REFERENCE TOO LOW

Remote control unit

Setting Initial setting value

(Adjustment time) NTSC 3.58 OTHERS

DELAY POINT

Test point Adjustment part Description

. MHz

DISPLAY : EXIT

VCO (CW)

YELLOW

DELAY POINT

2630

Note:

• Under normal conditions, no adjustment is required.

1. Select 1. IF from the SERVICE MENU.

2. Select 1. VCO by pressing the 1 key on the remote control unit.

3. Receive a broadcast signal.

4. Check the characters color of the BELOW REFERENCE displayed to yellow.

5. Press the DISPLAY key three times to return to normal screen.

1. Receive a black and white broadcast signal (color off).

2. Select 1. IF from the SERVICE MENU.

3. Select 2. DELAY POINT by pressing the 2 key on the remote con- trol unit.

4. Adjust the MENU

*/T

key in order to eliminate any noise or beat from the image. Any increase above the initial value produces noise and any decrease below it produces beat.

5. Press the DISPLAY key three times to return to the normal screen.

6. Turn to other channels and make sure that there are no irregularities.

18 No. 52081

AV-29WS3

VC (VIDEO/CHROMA) CIRCUIT ADJUSTMENTS

The setting (adjustment) using the remote control unit is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values.

Do not change the initial setting values of the setting (adjustment) items not listed in “ADJUSTMENT”.

•

[SUB MENU 2. VC] : Do not adjust.

Setting (Adjustment)

item

Variable range

PAL SECAM NTSC3.58 NTSC4.43 COMPONENT(V–2)

1 CUT-OFF (R/G) -32 – +31 0/0 -2/+14

2 DRIVE (R/G/B) -32 – +31 0/0/0

3 BRIGHT (TV/V-1/V-2/V-3) -32 – +31 -13/0/0/+1 —/—/-1/—

4 CONT -32 – +31 -10

5 COLOR -32 – +31 -4 -13 -11 +1 0

6 TINT (TV/VIDEO) -32 – +31 — — -15/+2 —/+1 —

7 SHARP (TV/VIDEO) -32 – +31 -28/-17 —/0

8Y DELAY (TV/VIDEO/S-VHS) -8 – +7 -7/+1/0 -7/+1/+1 0/+1/+1 0/0/+1 —/+1/—

9 AMP T. SHARP -32 – +31 0

Initial setting value

Item

Adjustment of WHITE BALANCE (Low light)

H.LINE OFF

H.LINE ON

R. LEVEL (

Measuring

instrument

Test point Adjustment part Description

Signal generator

Remote control unit

MENU : SELECT

MENU -/+: OPERATE

REMOTE CONTROL UNIT

12 3

)

1. CUTOFF

50 Hz

V/C

(R) (G)

1. CUTOFF (R) CUTOFF (G)

SCREEN VR [In HVT]

PAL

** **

DISPLAY : EXIT

G. LEVEL (8)

Note:

• Set PICTURE MODE (VSM) to “BRIGHT”.

1. Receive a PAL black and white signal (color off).

2. Select 2. VC from the SERVICE MENU.

3. Select 1. CUTOFF (R) and (G) with MENU &/^ key, and set each

value to initial setting value with the 4 and 7 keys, or 5 and 8 keys on the remote control unit.

4. Press the 1 key on the remote control unit to produce a single hori- zontal line.

5. Tu rn the SCREEN VR fully counterclockwise, then slowly turn it clockwise to where a red, blue or green color is faintly visible.

6. Use the keys 4 and 7 or 5 and 8 on the remote control unit and adjust the other 2 colors to where the single horizontal line appears white.

7. Tu rn the SCREEN VR to where the single horizontal line glows faintly.

8. Press the 2 key to return to 1. CUTOFF screen.

9. Press the DISPLAY key twice to return to the normal screen.

Setting (Adjustment) Variable Initial setting

Item range value

1. CUT OFF

R –32 — +31 0

G –32 — +31 0

R. LEVEL (

789

)

G. LEVEL (

)

No. 52081 19

AV-29WS3

Item

Adjustment of WHITE BALANCE (High light)

R. DRIVE (

Measuring

instrument

Signal generator

Test point Adjustment part Description

2. DRIVE (R) DRIVE (G) DRIVE (B)

Remote control unit

V/C

2. DRIVE

50 Hz

MENU 89: SELECT

(R) (G) (B)

/+: OPERATE

PAL

** ** **

DISPLAY : EXIT

REMOTE CONTROL UNIT

12 3

) B. DRIVE (8)

G. DRIVE (8)

Notes:

• Proceed to the following adjustment after having completed the adjustment of LOW LIGHT WHITE BALANCE.

• Set PICTURE MODE (VSM) to “BRIGHT”.

1. Receive a PAL black and white signal (color off).

2. Select 2. VC from the SERVICE MENU.

3. Select 2. DRIVE (R), (G) and (B) with MENU &/^ key, and set

each value to initial setting value with the 4 to 9 keys on the remote control unit.

4. Use the keys 4 to 9 to produce a white screen.

5. Press the DISPLAY key twice to return to the normal screen.

Setting (Adjustment) Variable Initial setting

Item range value

R –32 — +31 0

2. DRIVE G –32 — +31 0

B –32 — +31 0

R. DRIVE (

Adjustment of SUB BRIGHT

Adjustment of SUB CONTRAST

789

)

Remote control unit

B. DRIVE (

G.DRIVE (

3. BRIGHT

4. CONT

)

Notes:

• Proceed to the following adjustment after having completed the adjustments of LOW LIGHT WHITE BALANCE and HIGH LIGHT WHITE BALANCE.

• Set PICTURE MODE (VSM) to “BRIGHT”.

1. Receive a broadcast.

2. Select 2. VC from the SERVICE MENU.

3. Select 3. BRIGHT with the MENU &/^ key.

4. Set the initial setting value with the MENU

*/T

key.

5. If the brightness is not best with the initial setting value, make fine

adjustment until you get the best brightness.

6. Press the DISPLAY key twice to return to the normal screen.

Notes:

• Proceed to the following adjustment after having completed the adjustment of SUB BRIGHT.

• Set PICTURE MODE (VSM) to “BRIGHT”.

1. Receive a broadcast.

2. Select 2. VC from the SERVICE MENU.

3. Select 4. CONT with the MENU &/^ key.

4. Set the initial setting value with the MENU

5. If the contrast is not best with the initial setting value, make fine

6. Press the DISPLAY key twice to return to the normal screen.

20 No. 52081

adjustment until you get the best contrast.

*/T

key.

AV-29WS3

Item

Adjustment of SUB COLOR-I

Measuring

instrument

Remote control unit

Test point Adjustment part Description

5. COLOR

[Method of adjustment without measuring instrument]

Notes:

• Proceed to the following adjustment after having completed the adjustment of SUB CONT.

• Set PICTURE MODE (VSM) to “BRIGHT”.

– PAL COLOR –

1. Receive a PAL broadcast.

2. Select 2. VC from the SERVICE MENU.

3. Select 5. COLOR with the MENU &/^ key.

4. Set the initial setting value for PAL COLOR with the MENU

5. If the color is not best with the initial setting value, make fine adjust-

ment until you get the best color.

6. Press the DISPLAY key twice to return to the normal screen.

– SECAM COLOR –

7. Receive a SECAM broadcast.

8. Press the COLOR SYSTEM button on the remote control unit to

select the SECAM color system.

9. Make fine adjustment of SECAM COLOR in the same way as for

“PAL COLOR”.

– NTSC 3.58 COLOR –

10. Receive a NTSC 3.58MHz broadcast.

11. Press the COLOR SYSTEM button on the remote control unit to

select the NTSC 3.58 color system.

12. Make similar fine adjustment of NTSC 3.58 COLOR in the same

way as for “PAL COLOR”.

– NTSC 4.43 COLOR –

When adjustment is done for NTSC 3.58 COLOR, appropriate values are automatically set for NTSC 4.43 COLOR.

*/T

key.

Adjustment of SUB COLOR-II

Signal generator

Oscilloscope

Remote control unit

TP-47G TP-E (H) [CRT SOCKET PWB]

5. COLOR [Method of adjustment using measuring instrument]

Notes:

• Proceed to the following adjustment after having completed the adjustment of SUB CONT.

• Set PICTURE MODE (VSM) to “BRIGHT”.

– PAL COLOR –

1. Receive a PAL color bar signal (full field color bar 75% white).

2. Select 2. VC from the SERVICE MENU.

3. Select 5. COLOR with the MENU &/^ key.

Set the initial setting value of PAL COLOR with the MENU */Tkey.

5. Connect the oscilloscope between TP-47G and TP-E.

Adjust PAL COLOR to set the value (A) in the figure to +14V (V

W-G

– SECAM COLOR –

7. Receive a SECAM color bar signal (full field color bar 75% white).

8. Press the COLOR SYSTEM button on the remote control unit to

select the SECAM color system.

(A)

(–) 0V (+)

Set the initial setting value of SECAM COLOR with the MENU */Tkey.

10. Adjust SECAM COLOR to set the value (A) in the figure to -6V

(VW-G).

– NTSC 3.58 COLOR –

11. Receive a NTSC 3.58 color bar signal (full field color bar 75% white).

12. Press the COLOR SYSTEM button on the remote control unit to

select the NTSC 3.58 color system.

13.

Set the initial setting value of NTSC 3.58 COLOR with the MENU */ Tkey.

14. Adjust NTSC 3.58 COLOR to set the value (A) in the figure to +3V

(VW-G).

– NTSC 4.43 COLOR –

When adjustment is done for NTSC 3.58 COLOR, appropriate values are automatically set for NTSC 4.43 COLOR.

No. 52081 21

+ 47 hidden pages

JVC AV-29W33 Schematic

Specifications and Main Features

Frequently Asked Questions

User Manual

AV-29WS3

CONTENTS

SPECIFICATIONS

SAFETY PRECAUTIONS

FEATURES

FUNCTIONS

SPECIFIC SERVICE INSTRUCTIONS

SERVICE ADJUSTMENTS