JVC AV-21WM11/A Service Manual

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Page 1

SERVICE MANUAL

COLOUR TELEVISION

5218520038

AV-21WM11/A

BASIC CHASSIS

ECO

POWER

SENSOR

SYSTEM

PICTURE MODE

COLOUR

SOUND

TV/VIDEO

OFF

TIMER

CHANNEL

RETURN

0-/

SCAN

DISPLAY

MUTING

CHANNEL

VOLUME

REMOTE CONTROL UNIT RM-C364GY

TABLE OF CONTENTS

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

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

3 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

4 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

5 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28

No.52185

2003/8

Page 2

SPECIFICATION

Items Contents

Dimensions (W × H × D) 64.9cm × 46.6cm × 47.2cm Mass 24.6kg TV RF System B/G, I, D/K Colour System RF Mode PAL / SECAM

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

Receiving Frequency VHF Low 46.25MHz~140.25MHz

VHF High 147.25MHz~423.25MHz UHF 431.25MHz~863.25MHz CATV Mid: X-Z, S1-S10

Super: S11-S20 Hyper: S21-S41

Intermediate Frequency

Colour Sub Carrier Frequency PAL 4.43MHz

Power Input AC110V~AC240V, 50Hz / 60Hz Power Consumption 100W (Max) / 65W(Avg) Picture Tube Visible size: 51cm measured diagonally ( W : 41.6cm × H : 31.5cm) High Voltage 26.5kV±1.5kV (at zero beam current) Speaker 6.5cm × 13cm, Oval type × 2 Audio Power Output 3W (monaural) Aerial Input Terminal 75Ω unbalanced, coaxial Input Terminal Video 1V(p-p), 75Ω, RCA pin jack × 2 (Front / Rear)

Output Terminal Video 1V(p-p), 75Ω, RCA pin jack × 1

Headphone Jack 3.5mm mini jack Remote Control Unit RM-C364GY

VIF 38.0MHz SIF 32.5MHz(5.5MHz)

31.5MHz (6.5MHz)

32.0MHz (6.0MHz)

SECAM 4.40625MHz / 4.25MHz NTSC 3.58MHz / 4.43MHz

Audio 500mV(rms) (-4dBs), High impedance,

RCA pin jack × 2 (Front) / (Rear)

Audio 500mV(rms) (-4dBs), Low impedance, RCA pin jack × 1

(Battery size : AA / R6 / UM-3 × 2)

Design and specifications are subject to change without notice.

1-2 (No.52185)

Page 3

SECTION 1

PRECAUTION

1.1 SAFETY PRECAUTIONS

(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 (NEUTRAL) 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 appli ed to the picture tube must confo rm

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.

(7) Do not check high voltage by d rawing 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 gr ound frame and connecting the other end of the lead through a 10kΩ 2W resistor to the anode button.

(8) When service is required, obse rve 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.

a) 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.

b) Leakage Current Chec k

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 1000Ω per volt or more sensitivity in the following manner. Connect a 1500Ω 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 ac ross 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.).

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

0.15 F AC-TYPE

PLACE THIS PROBE

1500 10W

GOOD EARTH GROUND

ON EACH EXPOSED METAL PART

(No.52185)1-3

Page 4

SECTION 2

SPECIFIC SERVICE INSTRUCTIONS

2.1 FEATURES

• New chassis design enables use of an interactive on-screen control.

• Wide range voltage (110V~240V) AC power input.

• With AUDIO / VIDEO INPUT & OUTPUT terminal.

• MUTING button can reduce the audio level to zero instantly.

• Functional remote control to operate TV set (for channel select, volume control, power ON/OFF, etc.) from a distance.

C bus control utilizes single chip ICs for IF, V/C, DEF and VSM PRESET.

•I

• Built - in ECO MODE (ECONOMY, ECOLOGY) In accordance with the brightness in a room, the brightness and / of contrast of the picture can be adjusted automatically to make the optimum picture which is easy on the eye.

• Built - in ON TIMER, RETURN + & CHILD LOCK.

2.2 FUNCTIONS

 FRONT PANEL

MENU buttons

MENU button MENU - / + buttons

CHANNEL - / + buttons

VOLUME - / + buttons

ECO sensor

 REAR TERMINAL

AUDIO

VIDEO

CHANNEL

VOLUME

10 9 1 2 3

VIDEO

EXIT

AUDIO

ON TIMER

5 7

4 6

OUT

POWER

REMOTE CONTROL sensor

ON TIMER lamp

POWER lamp

MAIN POWER button

VIDEO / AUDIO terminal

HEADPHONE jack

AERIAL terminal

VIDEO INPUT terminal

AUDIO INPUT terminal

AUDIO OUTPUT terminal

VIDEO OUTPUT terminal

1-4 (No.52185)

Page 5

 REMOTE CONTROL UNIT

z RM-C364GY

1 2

3 4

5 6

7 8

ECO

SENSOR

COLOUR

TV/VIDEO

OFF

TIMER

CHANNEL

SCAN

DISPLAY

CHANNEL

SYSTEM

SOUND

123

456

789

RETURN+

REMOTE CONTROL UNIT RM-C364GY

POWER

PICTURE

MUTING

VOLUME

MODE

-/--

10 11

14 15

ECO sensor key

SOUND SYSTEM key

2 3

COLOUR SYSTEM key

TV/VIDEO key

OFF TIMER key

CHANNEL SCAN key

RETURN + key

DISPLAY key

CHANNEL - / + keys

POWER key PICTURE MODE key

Number (CH.) keys

12 13

- / - - key

MUTING key MENU keys

MENU / keys MENU - / + keys

VOLUME - / + keys

(No.52185)1-5

Page 6

SECTION 3

DISASSEMBLY

3.1 DISASSEMBLY PROCEDURE

3.1.1 REMOVING THE REAR COVER

(1) Unplug the power cord. (2) Remove the 9 screws [A] and 1 screw [B]. (3) Withdraw the REAR COVER toward you.

3.1.2 REMOVING THE MAIN PW BOARD

• Remove the REAR COVER. (1) Slightly raise the both side s of the MAIN PW BOARD by

hand and remove the MAIN PW BOARD from the FRONT CABINET.

(2) Withdraw the MAIN PW BOARD backward.

(If necessary, take off the wire clamp, connectors etc.)

3.1.3 REMOVING THE SPEAKER

• Remove the REAR COVER. (1) Remove the 4 screws [C]. (2) Follow the same steps when removing the other hand

SPEAKER.

3.1.4 CHECKING THE MAIN PW BOARD

• To check the back side of the PW BOARD. (1) Pull out the MAIN PW BOARD. (Refer to REMOVING THE

MAIN PW BOARD)

(2) Erect the PW BOARD vertically so that you can easily

check the back side of the PW BOARD.

CAUTION:

• When erecting the PW BOARD, be careful so that there will

be no contacting with other PW BOARD.

• Before turning on power, make sure that the CRT earth wire

and other connector are properly connected.

3.1.5 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.

1-6 (No.52185)

Page 7

SPEAKER

FRONT CABINET

(4)

SPEAKER

CRT SOCKET PWB

(Within MAIN PWB)

MAIN PWB

(4)

POWER CORD

REAR COVER

(9)

(No.52185)1-7

Page 8

3.2 MEMORY IC REPLACEMENT

3.2.1 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 the memory IC, be sure to use IC written with the initial values of data.

3.2.2 MEMORY IC REPLACEMENT PROCEDURE

(1) Power off

Switch the power off and disconnect the power plug from the wall outlet.

(2) Replace IC

Be sure to use 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 set SYSTEM CONSTANT SET

SERVICE MENU

1.IF 2.V/C

3.DEF 4.VSM PRESET

5.PRESET

6.SETUP TOUR OFF

1-6 : SELECT DISP : EXIT

************ **.*** *** ** **** ***

Fig.1

• It must not adjust without adjustment signals. a) Press the [DISPLAY] key and the [PICTURE MODE]

key of the REMOTE CONTROL UNIT simultaneously.

SYSTEM CONSTANT- I

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

displayed.

c) While the SERVICE MENU is displayed, again 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

SYSTEM CONSTANT SET 1

COLOUR : TRIPLE BILINGUAL : NO TUNER : MU ECO SENSOR LANGUAGE : E/C/M/I

: SELECT

- / + : OPERATE DISP : EXIT

the correct value with the [MENU - / +] key.

e) Press the [DISPLAY] key twice, and return to the

SYSTEM CONSTANT- II

normal screen.

(5) Receive channel of setting

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

(6) User Setting

Check the user setting value 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 ADJUSTMENT.

SYSTEM CONSTANT SET 2

B/B SOUND : OFF LOCK : 180 COLOUR AUTO QSS ALC : NO TEXT RATE

: SEL - / + : OPE DISP : EXIT

SYSTEM CONSTANT- III

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

: YES

: NO : MINT

: 20

DISPLAY key

- / + key

1-8 (No.52185)

ECO

SENSER

COLOUR

TV/VIDEO

OFF

TIMER

CHANNEL

SCAN

DISPLAY

SYSTEM

CHANNEL

SOUND

123

456

789

RETURN+

VOLUME

POWER

PICTURE

MODE

MUTING

PICTURE MODE key

NUMBERS key

-/--

MENU / key

(RM-C364GY)

SYSTEM CONSTANT SET 3

AMP TUNER : NO VNR TEXT TABLE : CYL VOLUME PWM : POS

: SEL - / + : OPE DISP : EXIT

: YES

Fig.2

Page 9

3.2.3 SYSTEM CONSTANT SETTING

Setting item Setting contents Setting value

COLOUR BILINGUAL TUNER ECO SENSOR LANGUAGE B/B SOUND LOCK COLOUR AUTO QSS ALC TEXT RATE AMP TUNER VNR TEXT TABLE

MULTI

YES

E/C/M/I

YES 10 20 ~ 230 240 250

YES

MINT

YES

10 20 40 80

YES

ARA

E/C

OFF

MQSS

CYL

PALTRIPLE

TRIPLE

YES

E/C/M/I

OFF

180

MINT

NO YES CYL

VOLUME PWM

POS

NEG

POS

3.2.4 FACTORY SETTING VALUE Setting item Setting value Setting item Setting value

SUB POWER ON CHANNEL PRESET Refer to OPERATING INSTRUCTION CHANNEL POSITION CHANNEL 1 ECO SENSOR OFF VOLUME About 10 VNR OFF TV/VIDEO TV AUTO SHUTOFF OFF COLOUR SYSTEM PAL ON TIMER PR1 0:00 SOUND SYSTEM B / G BLUE BACK OFF OFF TIMER 00 CHILD LOCK OFF PICTURE MODE (VSM) BRIGHT SETUP TOUR ON LANGUAGE ENGLISH

(No.52185)1-9

Page 10

3.2.5 SERVICE MENU SETTING ITEMS Setting item Setting value Setting item Setting value

2. V/C 1.CUT OFF

2.DRIVE

3.BRIGHT

4.CONT.

5.COLOUR

6.TINT

7.SECAM BL ADJ.

8.SHARP (Do not adjust)

3. DEFLECTION 1. VER. POSITION

2. HOR. POSITION

3. VER. HEIGHT

4. VER. LINEARITY

5. VER. SCURVE

6. HOR. VCO ADJUST (Do not adjust)

4.VSM PRESET TINT COLOUR BRIGHT CONT. SHARP

5. PRESET Colour System

(Do not adjust)

Sound System

(Do not adjust)

1. C TRAP FIX

2. SHARP PEAK

3. ABL

4. GAMMA

5. Y. DELAY TIME

6. BLACK EXP START

7. C-BPF

8. CW / SCP

9. VIF DET LEVEL

11. IF AGC MIN

12. VIF AGC

13. VIF PMOD

19. VNR

20. RGB LIM

21. RGB LIMIT LEVEL

23. TEXT H. POSITION

24. READ DATA

10. SIF DET LEVEL

14. SIF BPF BW ADJUST

15. SIF TRAP FO ADJUST

16. SIF TRAP FO ADJUST 2

17. SIF -TRAP

18. SIF -BPF

22. SIF SW

3.3 REPLACEMENT OF IC301 (IF V/C DECODER)

• For the IC301(IF V/C DECODER) of this model, all data are written in the micro-co mputer. So, write the d ata in the micro -

computer in accordance with the following procedures before starting adjustment.

 PROCEDURES

(1) Turn the POWER OFF. (2) Replace the IC301 with a new one. (3) While pressing [MENU] button and [VOL+] button ON the FRONT CABINET simultaneously, turn the POWER ON. When the

POWER is turned ON, the data is written in the micro-computer immediately.

 LOCATIONS OF FRONT PANEL BUTTONS AND LAMPS

MENU buttons

MENU button MENU - / + buttons

lamp

buttons

CHANNEL

1 2 3

VOLUME

EXIT

ON TIMER

5 7

4 6

POWER

CHANNEL / +

VOLUME / + buttons

ECO sensor

REMOTE CONTROL sensor

ON TIMER lamp

POWER

MAIN POWER button

1-10 (No.52185)

Page 11

3.4 REPLACEMENT OF CHIP COMPONENT

3.4.1 CAUTIONS

(1) Avoid heating for more than 3 seconds. (2) Do not rub the electrodes and th e 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.

3.4.2 SOLDERING IRON

(1) Use a high insulation soldering iron with a thin pointed end of it. (2) A 30w soldering iron is recommended for easil y removing parts.

3.4.3 REPLACEMENT STEPS

1. How to remove Chip parts

2. How to install Chip parts

[Resistors, capacitors, etc.]

(1) As shown in the figu re, push the part with tweezers and

alternately melt the solder at each end.

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

[Transistors, diodes, variable resistors, etc.]

(1) Apply extra solder to each lead.

SOLDER

[Resistors, capacitors, 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. 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.

(2) As shown in the figu re, push the part with tweezers and

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

NOTE :

After removing the part, remove remaining solder from the pattern.

(4) Then solder leads B and C.

(No.52185)1-11

Page 12

SECTION 4

ADJUSTMENT

4.1 ADJUSTMENT PREPARATION

(1) There are 2 ways of adjusting this TV : One is with the REMOTE C ONTROL UNIT and the other i s 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.

Item Preset value

PICTURE MODE (VSM) STANDARD TINT / COLOUR / BRIGHT / CONT. / SHARP Center VNR OFF AI ECO SENSOR OFF BLUE BACK OFF OFF TIMER OFF AUTO SHUTOFF OFF

4.2 MEASURING INSTRUMENT AND FIXTURES

(1) DC voltmeter (or digital voltmeter) (2) Oscilloscope (3) Signal generator (Pattern generator : PAL / SECAM / NTSC) (4) Remote control unit

4.3 ADJUSTMENT ITEMS

• B1 POWER SUPPLY

• FOCUS ADJUSTMENT

• TUNER / IF CIRCUIT ADJUSTMENT

• VIDEO CIRCUIT ADJUSTMENT

• DEFLECTION CIRCUIT ADJUSTMENT

• VSM PRESET SETTING

• PURITY/ CONVERGENCE ADJUSTMENT

1-12 (No.52185)

Page 13

4.4 ADJUSTMENT LOCATIONS

TOP

MAIN PWB

F901

CRT SOCKET PWB

TP-47G/R

IC701

(SOLDER SIDE)

TP-47B

TP-E

CRT EARTH WIRE (BRAIDED ASS'Y)

FRONT

IC702 MEMORY IC

DEG

TU001

IC301

1Pin TP-91(B1) 2Pin NC 3Pin X-ray1 4Pin X-ray2

5Pin TP-E( )

HVT

UPPER:FOCUS LOWER:SCREEN

(No.52185)1-13

Page 14

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.

1.IF Adjustment of the IF circuits.

2.V/C Adjustment of the VIDEO circuit.

3.DEF Adjustment of the DEFLECTION circuit.

4.VSM PRESET Adjustment of the initial setting values of VSM condition as STANDARD, SOFT and BRIGHT. (VSM : Video Status Memory)

5.PRESET Adjustment of the RF circuit (Do not adjust).

6.SETUP TOUR OFF It should be able to select mode (LANGUAGE an d AUTO CH PRESET) [Should be OFF].

4.5.3 BASIC OPERATION IN SERVICE MENU (1) Enter to SERVICE MENU

Press the [DISPLAY] key and the [PICTURE MODE] key of the REMOTE CONTROL UNIT simultaneously. Then enter the SERVICE MENU mode as shown in Fig.1.

SERVICE MENU

1.IF 2.V/C

3.DEF 4.VSM PRESET

5.PRESET

6.SETUP TOUR OFF

1-6 : SELECT DISP : EXIT

************ **.*** *** ** **** ***

Fig.1

(2) Exit from SERVICE MENU

When complete the adjustment work, press the [DISPLAY] key to return to the SERVICE MENU. And then press the [DISPLAY] key again, return to the normal screen.

(3) Select from SERVICE MENU

In SERVICE MENU, press the number [1]~[6] keys of the remote control unit, to select any of the adjustment items.The colours which selected item characters are changed.

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

DISPLAY key

- / + key

ECO

SENSER

SYSTEM

COLOUR

TV/VIDEO

OFF

TIMER

CHANNEL

SCAN

DISPLAY

SOUND

RETURN

POWER

PICTURE

MODE

123

456

789

0-/

MUTING

PICTURE MODE key

NUMBERS key

MENU / key

1-14 (No.52185)

CHANNEL

VOLUME

(RM-C364GY)

Page 15

4.5.4 SERVICE MENU FLOW CHART

************ **.***

SERVICE MENU

1.IF 2.V/C

3.DEF 4.VSM PRESET

5.PRESET

6.SETUP TOUR OFF

1-6 : SELECT DISP : EXIT

************ **.***

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

6. SETUP TOUR OFF

ON / OFF

(By pressing [6] key)

SUB MENU 1. IF

1. VCO

2. DELAY POINT

1-2 : SELECT DISP : EXIT

SUB MENU 2. V/C

V/C PAL

1. CUTOFF (G) (B)

50Hz

/ : SELECT

- / + : OPERATE DISP : EXIT

(R)

* ** * ** * **

VCO (CW)

TOO HIGH ABOVE REFERENCE JUST REFERENCE BELOW REFERENCE TOO LOW AFT ADJUST VCO ADJUST FINE

DISP : EXIT

DELAY POINT UHF

AGC TAKE-OVER

- / + : OPERATE DISP : EXIT

***.**

MHz

*** (** *** (**

) )

SUB MENU 3. DEF

DEF PAL

1. VER. POSITION

50Hz

/ : SELECT

- / + : OPERATE DISP : EXIT

SUB MENU 4. VSM PRESET

BRIGHT TINT COLOUR BRIGHT

CONT.

SHARP

/ : SELECT

- / + : OPERATE DISP : EXIT

** ** ** ** **

SUB MENU 5. PRESET

PRESET PAL

1. C-TRAP FIX

50Hz B/G

/ : SELECT

- / + : OPERATE DISP : EXIT

(No.52185)1-15

Page 16

4.5.5 METHOD OF SETTING  1. IF

[1. VCO]

(1) [1] key Select 1. IF. (2) [1] key Select 1. VCO. (3) The VCO (CW) screen will be displayed a allow mark when the AFT voltage is at a certain level. (4) [DISPLAY] key As you press this key twice, you will return to the SERVICE MENU.

[2. DELAY POINT]

(1) [1] key Select 1. IF. (2) [2] key Select 2. DELAY POINT. (3) [MENU - / +] keys Set (adjust) the setting values of the setting items. (4) [DISPLAY] key When this is pressed twice, you will return to the SERVICE MENU.

NOTE:

When the setting value has been changed, the new value will be stored in memory immediately.

 2. V/C, 3. DEF and 4. VSM PRESET

(1) [2]~[4] keys Select one from 2. V/C, 3. DEF and 4. VSM PRESET. (2) [MENU /] keys Select setting items. (3) [MENU - / +] keys Adjust the values of the items. (4) [DISPLAY] key When this is pressed, return to the SERVICE MENU.

NOTE:

When the setting value has been changed, the new value will be stored in memory immediately.

 6. SETUP TOUR

(1) By pressing the [6] key, you can change the ON or OFF (should be OFF).

(Should be OFF)

If it is ON, then you turn the TV power off, when you are turn the TV power on again.

The JVC's logo will be shown about 15 seconds automatically. (2) [MENU - / +] keys Select Language. (3) [MENU ] key Auto Search.

1-16 (No.52185)

Page 17

4.6 INITIAL SETTING VALUE OF SERVICE MENU

• 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.

• Do not change the initial Setting Values of the Setting (Adjustment) items not listed in "ADJUSTMENT PROCEDURE".  2. V/C

Setting item Variable range

1.CUT OFF RED -128 ~ +127 -50 ←←← GREEN -128 ~ +127 -50 ←←← BLUE -128 ~ +127 -50 ←←←

2.DRIVE RED -128 ~ +127 +0 ←←← BLUE -128 ~ +127 +0 ←←←

3.BRIGHT -128 ~ +127 +0 ←←←

4.CONT. -64 ~ +63 +0 ←←←

5.COLOUR -64 ~ +63 +0 ←←0

6.TINT TV -64 ~ +63 - - +0 0 VIDEO -64 ~ +63 - - +0 0

7.SECAM BL ADJ. -32 ~ +31 +0 ←←←

8.SHARP

(Do not adjust)

 3. DEFLECTION

1. VER. POSITION -04 ~ +03 -1 -3

2. HOR. POSITION -16 ~ +15 +3 +3

3. VER. HEIGHT -64 ~ +63 -35 +1

4. VER. LINEARITY -32 ~ +31 +15 -1

5. VER. SCURVE -32 ~ +31 -32 +0

6. HOR. VCO ADJUST

(Do not adjust)

TV -32 ~ +31 -5 (Fixed) ←←← VIDEO -32 ~ +31 +15 (Fixed) ←←←

Setting item Variable range

-64 ~ +63 +0 +0

PAL SECAM NTSC 3.58 NTSC 4.43

Initial setting value

fv : 50Hz fv : 60Hz

 4.VSM PRESET

Setting item

TINT +15 ←← COLOUR +15 ←← BRIGHT +15 ←← CONT. +30 +15 +11 SHARP +15 ← +12

BRIGHT STANDARD SOFT

Initial setting value

(No.52185)1-17

Page 18

 5. PRESET

The items in the following table, it is no requirement fo r adjustment.If values had changed by the miss operation, set the initial setting values in the following table.

z COLOUR SYSTEM (Do not adjust)

Setting item

1. C TRAP FIX 1111

2. SHARP PEAK 0000

3. ABL 1111

4. GAMMA 0000

5. Y. DELAY TIMETV 0223 VIDEO 0202

6. BLACK EXP START +3 +3 +3 +3

7. C-BPFTV 1100 VIDEO 1111

8. CW / SCP 0000

9. VIF DET LEVEL 0000

11. IF AGC MIN 0000

12. VIF AGC 0000

13. VIF PMOD 0000

19. VNR 15151515

20. RGB LIM 1111

21. RGB LIMIT LEVEL 2222

23. TEXT H. POSITION -3 -3 -3 -3

24. READ DATA ----

PAL SECAM NTSC 3.58 NTSC 4.43

Initial setting value (Fixed value)

z SOUND SYSTEM (Do not adjust)

Setting item

10. SIF DET LEVEL +0+0+0+0

14. SIF BPF BW ADJUST 0(-) 0(-) 0(-) 0(-)

15. SIF TRAP FO ADJUST 0(-) 0(-) 0(-) 0(-)

16. SIF TRAP FO ADJUST 2 0(-) 0(-) 0(-) 0(-)

17. SIF -TRAP 0000

18. SIF -BPF 0001

22. SIF SW 1110

B/G I D/K M

Initial setting value (Fixed value)

1-18 (No.52185)

Page 19

4.7 ADJUSTMENT PROCEDURE

4.7.1 CHECK ITEM

Item

B1 POWER SUPPLY check

Measuring

instrument

Signal generator

TP-91(B1) TP-E( )

DC voltmeter

4.7.2 TUNER / IF CIRCUIT

Test point Adjustment part Description

(1) Receive a whole black signal. (2) Connect a DC voltmeter to TP-91(B1) and TP-E ( ). (3) Make sure that the voltage is DC116.2V±2.0V.

Item

Measuring

instrument

IF VCO Signal

generator Remote

control unit

VCO (CW)

TOO HIGH ABOVE REFERENCE JUST REFERENCE BELOW REFERENCE TOO LOW AFT ADJUST VCO ADJUST FINE

DISP : EXIT

ADJUSTMENT AT THIS POINT IS USELESS

***.**

Test point Adjustment part Description

[1. IF]

1. VCO

• Please use signal generator which is correct proof about the sending frequency. (1) Receive a PAL full colour bar (210.25MHz) signal. (2) Select 1.IF. (3) Select < 1.VCO >. (4) Select VCO ADJUST.

MHz

(5) Press [MENU - / +] keys until the colour of the

characters TOO HIGH changes blue to yellow. Then gradually press the [MENU - / +] keys until the TOO

YELLOW

LOW changes yellow. At this time, confirm that the value of VCO ADJUST is near +00.

***(** ***(**

)

(6) Select AFT ADJUST. (7) Press [MENU - / +] keys until the characters JUST

REFERENCE changes blue to yellow.

(8) Press the [DISPLAY] key three times to return to

normal screen.

TOO HIGH

ABOVE REFERENCE

JUST REFERENCE

BELOW REFERENCE

TOO LOW

ADJUSTMENT POINT

(No.52185)1-19

Page 20

Item

DELAY POINT (AGC)

Measuring

instrument

Test point Adjustment part Description

Signal generator

Remote control unit

DELAY POINT UHF

AGC TAKE-OVER **

- / + : OPERATE DISP : EXIT

[1. IF]

2. DELAY POINT (AGC TAKE-OVER)

(1) Receive a black and white signal (colour off). (2) Select 1. IF. (3) Select < 2. DELAY POINT >. (4) Set the setting values of the settin g items as shown

bellow table.

(5) Then adjust the [MENU - / +] keys until video noise

disappears.

(6) Turn to other channels and make sure that there are

no irregularities.

Setting Item

DELAY POINT (AGC TAKE-OVER)

NTSC3.58

OTHER

4.7.3 FOCUS

Item

Measuring

instrument

FOCUS Signal

generator

Variable range

0 127

Initial setting value

Test point Adjustment part Description

FOCUS VR [In HVT]

(1) Receive a cross-hatch signal. (2) While watching the screen, adjust the FOCUS VR to

make the vertical and horizontal lines as fine and sharp as possible.

(3) Make sure that when the screen is darkened, the

lines remain in good focus.

1-20 (No.52185)

Page 21

4.7.4 DEFLECTION CIRCUIT

• There are 2 modes of adjustment (setting value) 50Hz mode and 60Hz mode, depending upon the kind of signals (vertical frequency 50Hz / 60Hz).

• When adjusted in 50Hz mode and 60Hz mo de will be automatically set.

The setting (adjustment) using the REMOTE CONTROL UNIT is ma de 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.

• Make sure that the adjustment is properly done on the screen of 60Hz mode.

NOTE:

• Adjust to make both 50Hz & 60Hz are the same v. size and fine straight line.

• When adjust again, adjust 50Hz mode first.

• When adjust in 60Hz mode, only 60Hz mode is adjust.

Item

VERTICAL HEIGHT & POSITION

Measuring

instrument

Signal generator

Remote control unit

Test point Adjustment part Description

[3. DEF]

1. VER. POSITION

3. VER. HEIGHT

(1) Receive a circle pattern signal. (2) Select 3. DEF. (3) Select <1. VER. POSITION >. (4) Set the initial setting value. (5) Adjust V and V' to be equal as shown in Fig.2. (6) Receive a cross-hatch signal. (7) Select <3. VER. HEIGHT >. (8) Set the initial setting value. (9) As shown in Fig.1, adjust to make the vertical screen

Screen size

92%

Picture size 100%

size 92% of the picture size.

HORIZONTAL POSITION

VERTICAL LINEARITY & S-CURVE CORRECT

Signal generator

Remote control unit

Signal generator

Remote control unit

Fig.1

Fig.2

[3. DEF]

2. HOR. POSITION

[3. DEF]

4. VER. LIN.

5. VER. SCURVE

TOP

CENTER

(1) Receive a circle pattern signal. (2) Select 3. DEF. (3) Select < 2. HOR. POSITION >. (4) Set the initial setting value. (5) Adjust H and H" to be equal as shown in Fig.2 .

• When the vertical linearity has been deteriorated remarkably, perform the following steps. (1) Receive a cross-hatch signal. (2) Select 3. DEF. (3) Select < 4. VER. LIN. >. (4) Set the initial setting value. (5) Select < 5. VER. SCURVE >. (6) Set the initial setting value. (7) Adjust < 4. VER. LIN. > and < 5. VER. SCURVE > so

that the spaces of each line as shown in Fig.3 on TOP, CENTER and BOTTOM become uniform.

Fig.3

BOTTOM

(No.52185)1-21

Page 22

4.7.5 VIDEO CIRCUIT 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 items not listed in "ADJUSTMENT PROCEDURE".

Item

WHITE BALANCE (LOW LIGHT)

Measuring

instrument

Signal generator

Remote control unit

Test point Adjustment part Description

[2.V/C]

1. CUT OFF (R)

1. CUT OFF (G)

1. CUT OFF (B) SCREEN VR

[IN HVT]

(1) Receive a black and white signal (colour off). (2) Select 2. V/C. (3) Select < 1. CUT OFF >. (4) Set each value to initial setting value with [4]~[9]

keys.

(5) Press the [1] key to show the single horizontal line on

screen.

(6) Turn the SCREEN VR fully counter-clockwise, then

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

slowly turn it clockwise to where one of a red, blue or green colour is faintly visible.

(7) Use [4]~[9] keys and adjust the other 2 colours which

CUTOFF OFF

(H.LINE OFF)

CUTOFF ON

(H.LINE ON)

R. CUTOFF( )

WHITE BALANCE (HIGH LIGHT)

R G B

Signal generator

Remote control unit

123

456

789

G.CUTOFF( )

B. CUTOFF( )

G.CUTOFF( )

[2.V/C]

2. DRIVE (R)

2. DRIVE (B)

except the appeared colour to where the single horizontal line appears white.

(8) Turn the SCREEN VR to where the single horizontal

line glows faintly.

(9) Press the [2] key to turn off the single horizontal line.

(10) Press the [DISPLAY] key twice to return to the

normal screen.

Setting item

1.CUT OFF

Variable

range

-128 +127

Initial setting

value

-50

(1) Receive a black and white signal (colour off). (2) Select 2. V/C. (3) Select < 2. DRIVE >. (4) Set each value to initial setting value with [4] and [7]

or [6] and [9] keys.

(5) Use the [4] and [7] or [6] and [9] keys to produce a

KEY ASSIGNMENT OF REMOTE CONTROL UNIT

white screen.

(6) Press the [DISPLAY] key twice to return to the nomal

screen.

R. DRIVE( )

SUB BRIGHT Remote

control unit

1-22 (No.52185)

123

456

789

R B

B. DRIVE( )

B. DRIVE( )R. DRIVE( )

[2. V/C]

3. BRIGHT

Setting item

2.DRIVE

Variable

range

-128 +127

Initial setting

value

(1) Receive any broadcast. (2) Select 2. V/C. (3) Select < 3. BRIGHT > . (4) Set the initial setting value. (5) If the brightness is not the best wi th the initial set

value, make fine adjustment until you get the best brightness.

Page 23

Item

SUB CONTRAST

Measuring

instrument

Remote control unit

SUB COLOUR-1 Remote

control unit

SUB COLOUR-2 Signal

generator Oscilloscope Remote

control unit

Test point Adjustment part Description

[2. V/C]

4. CONT.

(1) Receive any broadcast. (2) Select 2. V/C. (3) Select < 4. CONT >. (4) Set the initial setting value. (5) If the contrast is not the best with the initial set value,

make fine adjustment until you get the best contrast.

[2. V/C]

5. COLOUR (PAL/SECAM/NTSC)

[Method of adjustment without measuring instrument] PAL COLOUR :

(1) Receive a PAL broadcast. (2) Select 2. V/C. (3) Select < 5. COLOUR >. (4) Set the initial setting value for PAL COLOUR. (5) If the colour is not the best with the initial set value,

make fine adjustment until you get the best colour.

SECAM COLOUR :

(1) Receive a SECAM broadcast. (2) Make fine adjustment of SECAM COLOUR as

previously.

NTSC 3.58 COLOUR :

(1) Recsive a NTSC 3.58MHz broadcast. (2) Make similar fine adjustment of NTSC 3.58

COLOUR as previously.

NTSC 4.43 COLOUR :

(1) When NTSC 3.58 adjustment comple ted, NTSC

4.43 will be automatically set at the respective values.

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

[2. V/C]

5. COLOUR (PAL/SECAM/NTSC)

[Method of adjustment using measuring instrument] PAL COLOUR :

(1) Receive a PAL full field colour bar signal (75%

white). (2) Select 2. V/C. (3) Select < 5. COLOUR > . (4) Set the initial setting value of PAL COLOUR. (5) Connect the oscilloscope between TP-47G/R and

TP-E ( ). (6) Adjust PAL COLOUR to bring the value of (A) in

the illustration to +9V(W-G).

SECAM COLOUR :

(1) Receive a SECAM full field colour bar signal (75%

white). (2) Set the initial setting value of SECAM COLOUR . (3) Adjust SECAM COLOUR to bring the value of (A)

in the illustration to +6V(W-G).

(A)

(+)

NTSC 3.58 COLOUR :

(1) Receive a NTSC 3.58 fu ll field colour bar signal

(75% white). (2) Set the initial setting value of NTSC 3.58

COLOUR. (3) Adjust NTSC 3.58 COLOUR to bring the value of

(A) in the illustration to +8V(W-G).

NTSC 4.43 COLOUR :

(1) When NTSC 3.58 is set, NTSC 4.43 will be

automatically set at the respective values.

(No.52185)1-23

Page 24

Item

SUB TINT-1 Signal

SUB TINT-2 Signal

Measuring

instrument

generator Remote

control unit

generator Oscilloscope Remote

control unit

Test point Adjustment part Description

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

[2. V/C]

6. TINT

[2. V/C]

6. TINT

[Method of adjustment without measuring instrument] NTSC 3.58 TINT :

(1) Receive a NTSC 3.5 8 full field colour bar signal

(75% white). (2) Select 2. V/C. (3) Select < 6. TINT >. (4) Set the initial setting value of NTSC 3.58. (5) If you cannot get the best tint with the initial setting

value, make fine adjustment until you get the best

tint.

NTSC 4.43 TINT :

(1) When NTSC 3.58 is set, NTSC 4.43 will be

automatically set at the respective values.

[Method of adjustment using measuring instru ment] NTSC 3.58 TINT :

(1) Receive a NTSC 3.5 8 full field colour bar signal

(75% white). (2) Select 2. V/C. (3) Select < 6. TINT >. (4) Set the initial setting value of NTSC 3.58. (5) Connect the oscilloscope between TP-47G/R and

TP-E. ( ). (6) Adjust NTSC 3.58 TINT to bring the value of (B) in

the illustration +6V(W-C).

NTSC 4.43 TINT :

(1) When NTSC 3.58 is set, NTSC 4.43 will be

automatically set at the respective values.

SECAM BLACK OFFSET

Signal generator

Remote control unit

(-)

(B)

(+)

[2. V/C]

7. SECAM BL ADJUST

(1) Input a SECAM full field colour bar signal. (2) Select 2. V/C. (3) Select < 7. SECAM BL ADJUST >. (4) Set the initial setting value. (5) Switch the [1] key (colour OFF) and [2] key (colour

ON) and make sure that there is no colour on the black and white screen.

(6) If the black and white screen is not best with the

initial setting value, make fine adjustment until you get the best black and white screen.

(7) While watching the screen, adjust the value to be the

same colour between ON & OFF by [1] or [2] key.

(8) Press the [DISPLAY] key twice to return to the

normal screen.

1-24 (No.52185)

Page 25

4.7.6 VSM PRESET SETTING

VSM PRESET

Item

Measuring

instrument

VSM PRESET Remote

control unit

Test point Adjustment part Description

[4. VSM PRESET] TINT COLOUR BRIGHT CONT. SHARP

(1) Select 4. VSM PRESET. (2) Select BRIGHT with the [PICTURE MODE] key. (3) Adjust to bring the set values of TINT~SHARP to the

values shown in the below table.

(4) Respectively select the VSM PRESET mode for

SOFT and STANDARD, and make similar adjustment as in 3 above.

BRIGHT

TINT ** COLOUR ** BRIGHT **

CONT. SHARP **

/ : SELECT

- / + : OPREATE DISP : EXIT

VSM PRESET

Setting item

TINT

COLOUR

BRIGHT

CONT.

SHARP

BRIGHT

+15

+30

+15

STANDARD SOFT

+15

+11

+12

(No.52185)1-25

Page 26

4.7.7 PURITY AND CONVERGENCE  PURITY ADJUSTMENT

(1) Demagnetize CRT with the demagnetizer.

(2) Loosen the retainer screw of the deflec tion yoke.

(3) Remove the wedges.

(4) Input a green raster signal from the signal generator, and

turn the screen to green raster.

(5) Move the deflection yoke backward.

(6) Bring the long lug of the purity magnets on the short lug and

position them horizontally. (Fig.2)

(7) Adjust the gap between two lugs so that the GREEN

RASTER will come into the center of the screen. (Fig.3)

WEDGE

CRT

P/C MAGNETS

P : PURITY MAGNET 4 : 4 POLES (convergence magnets) 6 : 6 POLES (convergence magnets)

DEFLECTION

YOKE

P / C

MAGNETS

Fig.1

(8) Move the deflection yoke forward, and fix the position of the

deflection yoke so that the whole screen will become green.

(9) Insert the wedge to the top side of the deflection yoke so that

it will not move.

(10) Input a crosshatch signal.

(11) Verify that the screen is horizontal.

(12) Input red and blue ra ste r signal s, and make sure that puri ty

is properly adjusted.

Long lug

Short lug

(FRONT VIEW)

PURITY MAGNETS

Bring the long lug over the short lug and position them horizontally.

Fig.2

GREEN RASTER

CENTER

Fig.3

1-26 (No.52185)

Page 27

 STATIC CONVERGENCE ADJUSTMENT

(1) Input a crosshatch signal.

(2) Using 4-pole convergence magnets, overlap the red and

blue lines in the center of the screen (Fig.1) and turn them to magenta (red/blue).

(3) Using 6-pole convergence magnets, overla p the magenta

(red/blue) and green lines in the center of the screen and turn them to white.

(4) Repeat 2 and 3 above, and make best convergence.

 DYNAMIC CONVERGENCE ADJUSTMENT

(1) Move the deflection yoke up and down and overlap the lines

in the periphery. (Fig. 2)

(FRONT VIEW)

BLUE

RED

Fig.1

GREEN

BLUE

RED

(2) Move the deflection yoke left to right and overlap the lines in

the periphery. (Fig. 3)

(3) Repeat 1 and 2 above, and make best convergence.

• After adjustment, fix the wedge at the original position. Fasten the retainer screw of the deflection yoke. Fix the 6 magnets with glue.

GREEN

RED

(FRONT VIEW)

GREEN

RED

BLUE

GREEN RED

Fig.2

BLUE

Fig.3

GREEN

RED

GREEN

BLUE

RED GREEN BLUE

BLUE GREEN RED

(No.52185)1-27

Page 28

SECTION 5

TROUBLESHOOTING

This service manual does not describe TROUBLESHOOTING.

1-28 (No.52185)

Page 29

VICTOR COMPANY OF JAPAN, LIMITED

AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama, kanagawa-prefecture, 221-8528, Japan

(No.52185)

Printed in Japan

WPC