JVC HV-34LH21 Manual de usuario

SERVICE MANUAL

2003/11

COLOUR TELEVISION

52200200311 HV-34LH21, HV-34LH21/E,

HV-34LH51/S, HV-34LH71/G

TABLE OF CONTENTS

1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2 SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33

BASIC CHASSIS

RM-C1350

[HV-34LH71]

RM-C1351

[HV-34LH21]

RM-C1353

[HV-34LH51]

1-10 (No.52200)

3.3 MEMORY IC REPLACEMENT

3.3.1 MEMORY IC

This TV use memory IC.

In the memory IC, there are memorized data for correctly

operating the video and deflection circuits.

When replacing memory IC, be sure to use IC written with the

initial values of data.

3.3.2 PROCEDURE FOR REPLACING MEMORY IC

(1) Power off

Switch the power off and disconnect the power cord from

the wall outlet.

(2) Replace the memory IC

Be sure to use a memory IC written with the initial data

values.

(3) Power on

Connect the power plug into the wall outlet and switch the

power on.

(4) Check and setting of SYSTEM CONSTANT SET

• It must not adjust without signal.

a) Press the [DISPLAY] key and the [PICTURE MODE]

key of the REMOTE CONTROL UNIT

simultaneously.

b) The SERVICE MENU screen of Fig. 1 will be

displayed.

c) While the SERVICE MENU is displayed, press the

[DISPLAY] key and [PICTURE MODE] key

simultaneously, and the SYSTEM CONSTANT SET

screen of Fig. 2 will be displayed.

d) Check the setting values of the SYSTEM

CONSTANT SETTING. If the value is different, select

the setting item with the [MENU /] key, and set

the correct value with the [MENU /] key.

e) Press the [OK] key to memorize the setting value.

f) Press the [DISPLAY] key, and return to the normal

screen.

(5) Receive channels setting

Refer to the OPERATING INSTRUCTIONS and set the

receive channels (channels preset) as described.

(6) User settings

Check the user setting values and if setting value is

different, set the correct value. For setting, refer to the

OPERATING INSTRUCTIONS.

(7) Setting of SERVICE MENU

Verify the setting items of the SERVICE MENU, and reset

where necessary. For setting, refer to the SERVICE

ADJUSTMENTS.

Fig.1

Fig.2

Fig.3

1. IF

3. AUDIO

5. VSM PRESET

7.PIP

9. SHIPPING(OFF)

2. V/C

4. DEF

6. STATUS

8. SURROUND

0. BUS FREE

SERVICE MENU

1-9 : SELECT DISP : EXIT

1. TEXT

SYSTEM CONTANT SET

DISP : EXIT-/+ : STORE

2. PIP

3. COLOUR AUTO

4. BLUE BACK MUTE

ZOOM

(ASPECT) key

DISPLAY key

PICTURE MODE

key

MENU key

(/& /)

Numbers keys

[RM-C1350]

OK key

SERVICE MENU

(No.52200)1-11

3.3.3 FACTORY SETTING VALUES

Setting item Setting value Setting item Setting value

MAIN POWER SW OFF SUB POWER SW ON

CHANNEL PR1 DISPLAY INDICATED

PRESET CHANNEL

See OPERATING INSTRUCTIONS.

VOLUME 10

MENU SETTING

Setting item Setting value Setting item Setting value

PICTURE SETTING SOUND

PICTURE MODE BRIGHT BASS Center

CONTRAST Center TREBLE Center

BRIGHT Center BALANCE Center

SHARP Center CINEMA SURROUND OFF

COLOUR Center AI VOLUME ON

WHITE BALANCE MID INSTALL

AI ECO SENSOR DISPLAY OFF LANGUAGE ENGLISH

PICTURE FEATURES EDIT PRESET CHANNEL ONLY

DIGITAL VNR AUTO OTHER : NON (SPACE)

Digi Pure AUTO AUTO PROGRAM GROUP-1 : HV-34LH21

PULL DOWN AUTO TELETEXT LANGUAGE GROUP-2 : Unused

COLOUR SYSTEM TV : Depends on PR/CH

EXT : AUTO GROUP-3 : HV-34LH21/E

GROUP-4 : HV-34LH51/S

ZOOM REGULAR HV-34LH71/G

PICTURE TILT Center GROUP-5 : Unused

FAVORITE CH SETTING PRO1 : RED

PRO2 : GREEN

PRO3 : YELLOW

PRO4 : BLUE

PICTIRE MODE : BRIGHT

DIGITAL VNR : AUTO

WHITE BALANCE : MID

Digi Pure : AUTO

PICTURE EFFRCT : OFF

FEATURES

SLEEP TIMER OFF

BLUE BACK ON

CHILD LOCK OFF (for all the channels)

CHANNEL GUARD ALL CH : OFF

AUTO SHUT OFF OFF

VIDEO-3 SETTING COMPONENT

PIP / TWIN OFF Only

HV-34LH51/S

HV-34LH71/G

VIDEO SETTING VIDEO STATAS : VIDEO1

PICTURE MODE : BRIGHT

DIGITAL VNR: AUTO

WHITE BALANCE : MID

Digi Pure : AUTO

PICTURE EFFECT : OFF

SUB INPUT VIDEO1

1-12 (No.52200)

3.3.4 SYSTEM CONSTANT SETTING

3.3.5 SERVICE MENU SETTING ITEMS

Setting item HV-34LH21 / HV-29VH21 HV-34LH51 HV-34LH71

1. TEXT YES NO YES

2. PIP NO YES YES

3. COLOUR AUTO NO YES NO

4. BLUE BACK MUTE NO YES NO

Setting item Setting value Setting item Setting value

1. IF 1. VCO 5. VSM PRESET BRIGHT

STANDARD

SOFT

1. CONT

2. BRIGHT

3. SHARP

4. COLOUR

5. TINT

2. V / C 1. RGB BLK

2. CUTOFF R

3. CUTOFF G

4. CUTOFF B

5. WDR R

6. WDR G

7. WDR B

8. BRIGHT

9. CONTRAST

10. COLOUR

11. HUE

12. SHARP

13. SC ADJ.

14. TOP BLK

15. BTM BLK

16. YUV BRIGHT

17. YUV CONT

18. YUV COLU

19. YUV COLV

20. YUV YDEL

21. YUV UVDEL

22. YCDELM

COOL

WARM

NORMAL

6. WDR R

7. WDR G

8. WDR B (Do not adjust)

6. STATUS

(Do not adjust) 1. SOFT

7. PIP

[HV-34LH51/S, HV34LH71/G only]

1. HUE

2. SC ADJ

3. PIP HOR POS

4. PIP VER POS

5. YCDELS

8. SURROUND 1. CH CONFIG

2. MATRIX

3. REPRODUCT

4. CENTER MODE

5. SPATIAL EFF

6. VIRTUAL EFF

7. BASS EFFECT

8. HARM

9. HPF

10. LPF

11. AMP LIMIT

12. LEVEL ADJ

13. SWC

14. SW HPF

15. VOLUME

16. HYPER EFF

17. EFFECT MOD

18. HP GAIN

3. AUDIO 1. ERR LIMIT

2. A2 ID THR

3. SYSTEM

4. SUB BASS

5. SUB TREBLE

4. DEF 1. V-SHIFT

2. V-SIZE

3. H-CENT

4. H-SIZE

5. TRAPEZ

6. EW-PIN

7. COR-UP

8. COR-LO

9. COR-UP-S

10. COR-LO-S

11. HUE

12. BOW

13. V-S.CR

14. V-LIN

1-14 (No.52200)

SECTION 4

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) There are 2 ways of adjusting this TV : One is with the REMOTE CONTROL UNIT and the other is the conventional method

using adjustment parts and components.

(2) The 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.

(3) Make sure that connection is correctly made AC to AC power source.

(4) Turn on the power of the TV and measuring instruments for warning up for at least 30 minutes before starting adjustments.

(5) If the receive or input signal is not specified, use the most appropriate signal for adjustment.

(6) Never touch the parts (such as variable resistors, transformers and condensers) not shown in the adjustment items of this service

adjustment.

(7) Preparation for adjustment.

Unless otherwise specified in the adjustment items, preset the following functions with the REMOTE CONTROL UNIT.

4.2 MEASURING INSTRUMENT AND FIXTURES

(1) DC voltmeter (or digital voltmeter)

(2) HV voltmeter

(3) Oscilloscope

(4) Signal generator (Pattern generator : PAL / SECAM / NTSC)

(5) Remote control unit

4.3 ADJUSTMENT ITEMS

CHECK ITEMS

• B1 POWER SUPPLY check

• HIGH VOLTAGE check

TUNER / IF CURCUIT

• IF VCO check

FOCUS

• FOCUS adjustment

VSM PRESET SETTING

• VSM PRESET

VIDEO CIRCUIT

• WHITE BALANCE adjustment

• SUB BRIGHT adjustment

• SUB CONTRAST adjustment

• SUB COLOUR-1 adjustment

• SUB COLOUR-2 adjustment

• SUB HUE-1 adjustment

• SUB HUE-2 adjustment

• COLOUR DECODER VCO adjustment

DEFLECTION CIRCUIT

• V. POSITION adjustment

• V. SIZE adjustment

• H. POSITION adjustment

• H. SIZE adjustment

• SIDE-PIN adjustment

• TRAPEZIUM adjustment

• UPPER / LOWER CORNER PIN adjustment

• PARALLEL(TILT) adjustment

• BOW adjustment

• V. S-SHAPE CORRECTION & LINEARITY adjustment

AUDIO CIRCUIT

Item Preset value

PICTURE MODE (VSM) STANDARD

WHITE BALANCE MID

DIGITAL VNR AUTO

Digi Pure AUTO

BASS / TREBLE / BALANCE Center

CINEMA SURROUND OFF

ZOOM REGULAR

SLEEP TIMER OFF

(No.52200)1-15

4.4 ADJUSTMENT LOCATION

CN001

CN002

CN00B

UPPER:FOCUS1

FOCUS 2

LOWER:SCREEN

DEG

CN00G

CN00R

TP-47B

TP-E

(VR1)

YHC

(VR2)

TP-Y

XV COIL

CN003

CN004

CN005

MICOM / 100Hz

PWB

MAIN PWB

FRONT CONTROL PWB(1/2) FRONT CONTROL PWB(2/2)

POWER &DEF PWB

CRT SOCKET PWB

AV SW PWB

MEMORY IC

IC701

LF901

F901

C901

POWER IC101

TV/VIDEO EXIT

VOL UP

VOL DOWN

HEAD

POHONE

FRONT

MENU / OK

CH DOWN

CH UP

CRT

BRAIDED WIRE

TUNER

ANT- IN

IC001

MICON

IC301 1pin:B1(TP-91)

2pin:NC

3pin:X-RAY

4pin:X-RAY

5pin:GND( )

IN (VIDEO-4)

R L/MONO

VIDEO S-VIDEO

AUDIO

R4 L4 V4 S IN

SP-R

SP-L

DEG COIL

FRONT TOP

FRONT

CRT

PC MAGNET

(SOLDER SIDE)

POWER CORD

(R251)

1-16 (No.52200)

4.5 BASIC OPERATION OF SERVICE MENU

4.5.1 TOOL OF SERVICE MENU OPERATION

Operate the SERVICE MENU with the REMOTE CONTROL UNIT.

4.5.2 SERVICE MENU ITEMS

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

4.5.3 BASIC OPERATION OF SERVICE MENU

1. HOW TO ENTER THE SERVICE MENU

Press the [PICTURE MODE] key and the [DISPLAY] key of the

REMOTE CONTROL UNIT simultaneously, and the SERVICE

MENU screen of Fig. 1 will be displayed.

2. SELECTION OF SUB MENU SCREEN

Press one of [1] ~ [0] keys of the REMOTE CONTROL UNIT

and select the SERVICE MENU SCREEN (See Fig. 3), form

the SERVICE MENU.

1. IF

2. V/C

3. AUDIO

4. DEF

5. VSM PRESET

6. STATUS [Do not adjust]

7. PIP [HV-34LH51/S, HV-34LH71/G only]

8. SURROUND

9. SHIPPING(OFF)

0. BUS FREE

Fig.1

Fig.2

1.IF This mode adjusts the setting values of the IF circuit.

2.V/C This mode adjusts the setting values of the VIDEO circuit.

3.AUDIO This mode adjusts the setting values of the multiplicity AUDIO circuit.

4.DEF This mode adjusts the setting values of the DEFLECTION circuit for each aspect mode given below.

5.VSM PRESET This mode adjusts the initial setting values of BRIGHT, STANDARD and SOFT. (VSM : Video Status Memory)

6.STATUS It is no requirement to adjustment. [Do not adjust]

7.PIP This mode adjusts the setting values of the PIP circuit. [HV-34LH51/S HV-34LH71/G only]

8.SURROUND This mode adjusts the setting values of the SURROUND circuit.

9.SHIPPING (OFF) This mode adjusts the setting values of the channel presettings.

If you turn the SHIPPING position set ON.

This setting becomes channel presetting automatically.

Also you turn the TV power off, this setting become OFF position automatically.

0.BUS FREE It is not requirement to adjustment.

1. IF

3. AUDIO

5. VSM PRESET

7.PIP

9. SHIPPING(OFF)

2. V/C

4. DEF

6. STATUS

8. SURROUND

0. BUS FREE

SERVICE MENU

1-9 : SELECT DISP : EXIT

ZOOM

(ASPECT) key

DISPLAY key

PICTURE MODE

key

MENU key

(/& /)

Numbers keys

[RM-C1350]

OK key

SERVICE MENU

(No.52200)1-17

3. SETTING METHOD

1.IF

[1. VCO] : It must not adjust without signal

(1) [1] key

Select 1.IF.

(2) [1] key

Select 1.VCO(CW).

Check the arrow position between the ABOVE REF. and BELOW REF.

(3) [DISPLAY] key

Return to the SERVICE MENU screen.

2.V/C, 3.AUDIO, 4.DEF, 5.VSM PRESET, 7.PIP AND 8.SURROUND.

(1) [2], [3], [4], [5], [7], [8] key

Select one from 2.V/C, 3.AUDIO, 4.DEF, 5.VSM PRESET, 7.PIP, 8.SURROUND.

(2) [MENU /] key

Select setting items.

(3) [MENU /] key

Set (adjust) the setting values of the setting items.

(4) MENU [OK] key

Memorize the setting value.

(Before storing the setting values in memory, do not press the CH, TV, POWER ON / OFF key. if you do, the values will not

be stored in memory.)

(5) [DISPLAY] key

Return to the SERVICE MENU screen.

6.STATUS, 9. SHIPPING(OFF) AND 0. BUS FREE.

It is not requirement to adjustment.

4. RELEASE OF SERVICE MENU

After completing the setting, return to the SERVICE MENU, then again press the [DISPLAY] key.

1-18 (No.52200)

4.5.4 SERVICE MENU FLOW CHART

Fig.3

1. IF

3. AUDIO

5. VSM PRESET

7.PIP

9. SHIPPING(OFF)

2. V/C

4. DEF

6. STATUS

8. SURROUND

0. BUS FREE

SERVICE MENU

1-9 : SELECT DISP : EXIT

1. VCO

IF SERVICE MENU

DISP : EXIT1-2 : SELECT

TOO HIGH

ABOVE REF

JUST REF

BELOW REF

TOO LOW

VCO(CW)

MHz

DISP : EXIT

1. RGB_BLK

V/C PAL

DISP : EXIT-/+ : STORE

1. ERR LIMIT

EEROR_RATE=

AUDIO

DISP : EXIT-/+ : STORE

1. V-SHIFT

( )

DEF REGULAR Hz

DISP : EXIT-/+ : STORE

1. CONT

VSM PRESET STD

DISP : EXIT-/+ : STORE

1. SOFT

STATUS

DISP : EXIT-/+ : STORE

1. HUE

PIP

DISP : EXIT-/+ : STORE

1. CH CONFIG

SURROUND SOUND SYSTEM

DISP : EXIT-/+ : STORE

SERVICE MENU

1. IF (CW)

1. RGB BLK

2. CUTOFF R

3. CUTOFF G

4. CUTOFF B

5. WDR R

6. WDR G

7. WDR B

8. BRIGHT

9. CONTRAST

10. COLOUR

11. HUE

BRIGHT

STANDARD

SOFT

12. SHARP

13. SC ADJ.

14. TOP BLK

15. BTM BLK

16. YUV BRIGHT

17. YUV CONT

18. YUV COLU

19. YUV COLV

20. YUV YDEL

21. YUV UVDEL

22. YCDELM

5. VSM PRESET

6. STATUS [Do not adjust]

7. PIP

[HV-34LH51/S HV-34LH71/G only]

8. SURROUND

2. V/C

3. AUDIO [Do not adjust]

4. DEF

1. ERR LIMIT

2. A2 ID THR

3. SYSTEM

4. SUB BASS

5. SUB TREBLE

1. V-SHIFT

2. V-SIZE

3. H-CENT

4. H-SIZE

5. TRAPEZ

6. EW-PIN

7. COR-UP

8. COR-LO

9. COR-UP-S

10. COR-LO-S

11. HUE

12. BOW

13. V-S.CR

14. V-LIN

1. CONT

2. BRIGHT

3. SHARP

4. COLOUR

5. TINT

6. WDR R

7. WDR G

8. WDR B

PICTURE MODE

COOL

WARM

NORMAL

COLOUR TEMP

1. HUE

2. SC ADJ

3. PIP HOR POS

4. PIP VER POS

5. YCDELS

1. CH CONFIG

2. MATRIX

3. REPRODUCT

4. CENTER MODE

5. SPATIAL EFF

6. VIRTUAL EFF

7. BASS EFFECT

8. HARM

9. HPF

10. LPF

11. AMP LIMIT

12. LEVEL ADJ

13. SWC

14. SW HPF

15. VOLUME

16. HYPER EFF

17. EFFECT MOD

18. HP GAIN

(No.52200)1-19

4.6 INITIAL SETTING VALUE OF SERVICE MENU

(1) Adjustment of the SERVICE MENU is made on the basis of the initial setting values:however, the new setting values which set

the screen in its optimum condition may differ from the initial setting value.

(2) Do not change the initial setting values of the setting items not listed in "ADJUSTMENT PROCEDURE".

(3) "---" is impossible to adjust.

[2. V/C]

Setting item Variable range

Initial setting value

RF / Composite Video / S-Video Component video

PAL SECAM NTSC 3.58 NTSC 4.43 50Hz-i 60Hz-i 60Hz-p

1. RGB BLK --- --- --- --- --- --- --- ---

2. CUTOFF R 0000~0255 130 130 130 130 5 5 0

3. CUTOFF G 0000~0255 130 130 130 130 -8 -8 0

4. CUTOFF B 0000~0255 150 150 150 150 0 0 0

5. WDR R 0000~0255 160 160 160 160 0 0 0

6. WDR G 0000~0255 160 160 160 160 0 0 0

7. WDR B 0000~0255 150 150 150 150 0 0 0

8. BRIGHT RF -128~0127 -50 -50 -50 -50 --- --- ---

VIDEO 222233-7

9. CONTRAST RF 0000~0063 42 42 42 42 --- --- ---

VIDEO 7777---------

10. COLOUR RF 0000~0063 48 55 30 6 --- --- ---

VIDEO -3000-8410

11. HUE RF -064~0063 --- --- 2 1 --- --- ---

VIDEO --- --- 0 0 --- --- ---

12. SHARP RF -015~0015 -5 -5 -5 -5 0 0 0

VIDEO 0000000

13. SC ADJ 0000~0063 18 18 18 18 --- --- ---

14. TOP BLK 0000~0255 35 35 46 46 35 46 46

15. BTM BLK -127~0511 -15 -15 -37 -37 -15 -37 -37

16. YUV BRIGHT -064~0063 --- --- --- --- -4 -4 -4

17. YUV CONT 0000~0063 --- --- --- --- 57 57 57

18. YUV COLU 0000~0063 --- --- --- --- 50 60 -10

19. YUV COLV 0000~0063 --- --- --- --- 60 55 0

20. YUV YDEL 0000~0127 --- --- --- --- 60 50 36

21. YUV UVDEL 0000~0127 --- --- --- --- 49 49 36

22.TCDELMRF 0000~01272000---------

VIDEO 0000---------

Setting item Variable range

Initial setting value

Compress (16:9)

RF/ Composite Video / S-Video Component video

PAL SECAM NTSC 3.58 NTSC 4.43 50Hz-i 60Hz-i 60Hz-p

8. BRIGHT RF -128~0127 0 0 0 0 0 0 0

VIDEO 0 0 0 0 0 0 0

9. CONTRAST RF 0000~0063 -4 -4 -4 -4 --- --- ---

VIDEO -4 -4 -4 -4 --- --- ---

10. COLOUR RF 0000~0063 0 0 0 0 --- --- ---

VIDEO 0 0 0 0 0 0 0

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