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JVC AV-21W33 Service Manual
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JVC AV-21W33 Service Manual

JVC AV-21W33 Service Manual

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SERVICE MANUAL

MUTING
POWER
COLOR
CINEMA
SYSTEM
SURROUND
ECO
DISPLAY
SENSOR
MENU
CLOSED
CAPTION
TV/VIDEO
1
2
3
OFF
TIMER
4
5
6
PICTURE
MODE
7
8
9
CHANNEL
RETURN+
100+
SCAN
0
CHANNEL
VOLUME
RM-C1019
TV
RM-C1019-1H
[AV-21W33
CONTENTS
SPECIFICATIONS ....................................................................................................................................2
a
OPERATING INSTRUCTIONS (APPENDIX)
SAFETY PRECAUTIONS .........................................................................................................................3
FEATURES ..............................................................................................................................................4
FUNCTIONS .............................................................................................................................................5
SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................6
SERVICE ADJUSTMENTS ....................................................................................................................14
STANDARD CIRCUIT DIAGRAM (APPENDIX) .................................................................................. 2-1
PARTS LIST ...........................................................................................................................................33
COPYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
COLOR TELEVISION
AV-21W33
AV-21W33B
MUTING
POWER
COLOR
CINEMA
SYSTEM BASS
SURROUND
ECO
DISPLAY
SENSOR
MENU
CLOSED
CAPTION
TV/VIDEO
1
2
3
OFF
TIMER
4
5
6
PICTURE
MODE
7
8
9
CHANNEL
RETURN+
100+
SCAN
0
CHANNEL
VOLUME
RM-C1018
TV
RM-C1018-1H
]
[AV-21W33B
]
/T
/T
/T
/T
AV-21W33
AV-21W33B
BASIC CHASSIS
CH
No. 52075
Nov. 2002

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Summary of Contents for JVC AV-21W33

  • Page 1: Table Of Contents

    AV-21W33 AV-21W33B SERVICE MANUAL COLOR TELEVISION BASIC CHASSIS AV-21W33 AV-21W33B MUTING POWER MUTING POWER COLOR CINEMA COLOR CINEMA SYSTEM SURROUND SYSTEM BASS SURROUND DISPLAY SENSOR DISPLAY SENSOR MENU MENU CLOSED CLOSED CAPTION CAPTION TV/VIDEO TV/VIDEO TIMER TIMER PICTURE PICTURE MODE...

  • Page 2: Specifications

    AV-21W33 AV-21W33B SPECIFICATIONS Contents Items AV-21W33 AV-21W33B Dimensions (W × H × D) 64.9cm × 46.55cm × 47.15cm 64.9cm × 47.8cm × 47.15cm Mass 22.5kg 24.8kg TV RF System Colour System TV Mode NTSC3.58 VIDEO Mode NTSC3.58 / NTSC4.43 / PAL...

  • Page 3: Safety Precautions

    AV-21W33 AV-21W33B SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many circuits 8. When service is required, observe the original lead dress. Extra and components specially for safety purposes. For continued pro- precaution should be given to assure correct lead dress in the high tection, no changes should be made to the original design unless voltage circuit area.

  • Page 4: Features

    AV-21W33 AV-21W33B FEATURES s New chassis design enables use of an interactive on-screen control. s Built-in DIGITAL ECO MODE (ECONOMY, ECOLOGY). s Pure flat CRT produces fine textured picture in every detail. In accordance with the brightness in a room, the brightness and/or s Wide range voltage (110V ~ 240V) for AC power input.

  • Page 5: Functions

    AV-21W33 AV-21W33B FUNCTIONS FRONT PANEL POWER MENU CHANNEL VOLUME L/MONO EXIT IN (VIDEO-3) REAR PANEL [AV-21W33 [AV-21W33B COMPONENT COMPONENT VIDEO-1 VIDEO-1 ( VIDEO-2 ) ( VIDEO-2 ) OUTPUT OUTPUT INPUT INPUT INPUT INPUT BASS SPEAKER MONO MONO MONO MONO REMOTE CONTROL UNIT...

  • Page 6: Specific Service Instructions

    AV-21W33 AV-21W33B SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY PROCEDURE REMOVING THE TWIN PORT BASS BLASTER UNIT [AV-21W33B only] 1. Unplug the power supply cord. 2. Disconnect the Twin Port Bass Blaster Unit’s cord from the rear of the TV set. 3. Remove the Twin Bass Blaster Unit by pulling it upwards.
  • Page 7 AV-21W33 AV-21W33B PICTURE TUBE FRONT CABINET (X2) SPEAKER MAIN PWB (CRT SOCKET PWB) MAIN PWB PB STOPPER (For AV-21W33B only) SPEAKER (X2) TWIN PORT BASS BLASTER UNIT (For AV-21W33B only) REAR COVER (X9) B (X4) Fig.1 No. 52075...
  • Page 8 AV-21W33 AV-21W33B REMOVING THE CRT CRT CHANGE TABLE * 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.

  • Page 9: Replacement Of Memory Ic

    AV-21W33 AV-21W33B REPLACEMENT OF MEMORY IC 1. MEMORY IC (6) User setting This TV uses the following memory IC. Check the user setting values in Table 2, and if setting value is Memory IC: IC1702 on MAIN PW Board different, set the correct value.
  • Page 10 AV-21W33 AV-21W33B SETTING OF SYSTEM CONSTANT SET Setting value Setting item Setting content AV-21W33 AV-21W33B NTSC TRIPLE COLOR SYSTEM NTSC COMB TILT SUPER BASS E/S/P LANGUAGE B/B SOUND TUNER COLOR AUTO LOCK LONG WAIT SHORT WAIT 3D SURROUND 3CH VOL/TONE...
  • Page 11 AV-21W33 AV-21W33B USER SETTING VALUES Setting item Setting value SUB POWER CHANNEL POSITION CH-02 CHANNEL PRESET REFER TO OPERATING INSTRUCTIONS VOLUME 15 ± 2 TV/VIDEO COMPRESS (16:9) AUTO SHUTOFF CHILD LOCK BLUE BACK VIDEO-2 SET VIDEO LANGUAGE SURROUND AI VOLUME...
  • Page 12 AV-21W33 AV-21W33B SERVICE MENU SETTING ITEMS Service menu Setting item Service menu Setting item 1. IF 1. VCO 5. PRESET 1. PSNS 2. DELAY POINT 2. ACL Do not adjust 3. MUS 4. MAT 2. VC 1. CUTOFF(R/G) 5. FCO 2.
  • Page 13 AV-21W33 AV-21W33B 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.

  • Page 14: Service Adjustments

    AV-21W33 AV-21W33B 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.
  • Page 15 AV-21W33 AV-21W33B ADJUSTMENT LOCATIONS MAIN PWB ASS'Y S783 S781 J773 J772 J771 J770 S784 S782 S780 FRONT S780 : MENU POWER SW S781 : CH– S782 : CH+ S783 : VOL– S901 CN001 S784 : VOL+ IC702 IC701 (J774: AV-21W33B...
  • Page 16 AV-21W33 AV-21W33B 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: •...
  • Page 17 AV-21W33 AV-21W33B SERVICE MENU SUB MENU 1. IF SERVICE MENU 1. IF 2. VC VCO (CW) ***** 3. DEF 4. VSM PRESET TOO HIGH 5. PRESET 6. AUDIO 1. VCO ABOVE REFERENCE 7. PLUG & PLAY (ON) BELOW REFERENCE 2. DELAY POINT...

  • Page 18: Focus Adjustment

    AV-21W33 AV-21W33B ADJUSTMENTS B1 POWER SUPPLY Measuring Item Test point Adjustment part Description instrument Check of Signal B1 (pin 1) 1. Receive a black and white signal. generator GND (pin 5) 2. Connect a DC voltmeter between B1 and GND...
  • Page 19 AV-21W33 AV-21W33B 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.
  • Page 20 AV-21W33 AV-21W33B Measuring Item Test point Adjustment part Description instrument Signal 2. DRIVE (R) Notes: Adjustment of WHITE generator DRIVE (G) • Proceed to the following adjustment after having completed the ad- BALANCE DRIVE (B) justment of LOW LIGHT WHITE BALANCE.
  • Page 21 AV-21W33 AV-21W33B Measuring Item Test point Adjustment part Description instrument Remote 5. COLOR [Method of adjustment without measuring instrument] Adjustment control unit Notes: • Proceed to the following adjustment after having completed the ad- COLOR-I justment of SUB CONT. • Set PICTURE MODE (VSM) to “BRIGHT”.
  • Page 22 AV-21W33 AV-21W33B Measuring Item Test point Adjustment part Description instrument Adjustment Signal 6. TINT [Method of adjustment without measuring instrument] generator Notes: SUB TINT-I • Proceed to the following adjustment after having completed the ad- Remote justment of SUB CONT.
  • Page 23 AV-21W33 AV-21W33B DEFLECTION 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.
  • Page 24 AV-21W33 AV-21W33B Measuring Item Test point Adjustment part Description instrument Adjustment 2. VER. HEIGHT 9. Receive a PAL cross-hatch signal. Signal 10. Select 2. VER. HEIGHT with the MENU &/^ key. 13. V. ZOOM generator V. HEIGHT 11. Set the initial setting value of 2. VER. HEIGHT with the MENU */Tkey.
  • Page 25 AV-21W33 AV-21W33B [COMPRESS (16 : 9) : ON, fv: 50Hz mode ] Measuring Item Test point Adjustment part Description instrument Adjustment Signal 13. V. ZOOM 1. Receive a PAL cross-hatch signal of vertical frequency 50Hz. generator 2. VER. HEIGHT 2. Select COMPRESS from the MENU and set COMPRESS to ON.
  • Page 26 AV-21W33 AV-21W33B Measuring Item Test point Adjustment part Description instrument 6. Select 3. VER. POSITION with the MENU &/^ key. Adjustment Signal 3. VER. POSITION generator 7. Set the initial setting value of 3. VER. POSITION with the MENU */Tkey.
  • Page 27 AV-21W33 AV-21W33B Measuring Item Test point Adjustment part Description instrument Adjustment 4. VER. SCURVE 19. Receive a NTSC cross-hatch signal. Signal 20 Select 4. VER. SCURVE with the MENU &/^ key. generator V.S-CURVE 21. Set the initial setting value of 4. VER. SCURVE with the MENU */Tkey.
  • Page 28 AV-21W33 AV-21W33B [VIDEO - 2 SET : COMPONENT, fv: 50/60Hz mode] Measuring Item Test point Adjustment part Description instrument Adjustment 5. HOR. POSITION 1. Receive a PAL circle pattern signal to VIDEO-2 terminal. Signal 2. Select VIDEO-2 SET from the MENU and set VIDEO-2 SET to generator H.

  • Page 29: Audio Adjustment

    0 – F SOFT CLIPPER 0 – 3 IF PLL OFFSET 0 – 63 OVERSHOOT 0 – 3 AI VOLUME 00/01/10/11 SUB BASS 3D (AV-21W33 only) –3 – +3 – SUB TREBLE 3D (AV-21W33 only) –3 – +3 –2 –...

  • Page 30: Purity Adjustment

    AV-21W33 AV-21W33B PURITY ADJUSTMENT Note: 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 WEDGE DEFLECTION reconfirming PURITY adjustment. YOKE 1. Demagnetize CRT with the demagnetizer.
  • Page 31 AV-21W33 AV-21W33B CONVERGENCE ADJUSTMENTS 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. 4) and turn them to magenta (red/blue). 3. Using 6-pole convergence magnets, overlap the magenta(red/blue) (FRONT VIEW) and green lines in the center of the screen and turn them to white.
  • Page 32 AV-21W33 AV-21W33B SELF-CHECK FUNCTIONS 1. Outline This model has self-check functions given below.When an abnormality has been detected,the SUB POWER is turned off and both ECO and ON TIMER LEDs flash to inform of the failure.An abnormality is detected by the signal input state of the control line connected to the microcomputer.

  • Page 33: Parts List

    VICTOR COMPANY OF JAPAN, LIMITED HOME AV NETWORK BUSINESS UNIT. 12,3-chome,Moriya-cho,Kanagawa-ku,Yokohama,Kanagawa-prefecture,221-8528,Japan AV21W33T-H Printed in Japan AV21W33BT-H 0211 WPC...

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