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JVC AV-32230 Service Manual

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SERVICE MANUAL

AV-32230
AV-32230
AV-32230
TV
RM-C306
RM-C305
[AV-32230]
[AV-32260]
CONTENTS
SPECIFICATIONS ....................................................................................................................................2
SAFETY PRECAUTIONS ........................................................................................................................3
FEATURES ..............................................................................................................................................5
MAIN DIFFERENCE LIST ........................................................................................................................6
HOW TO IDENTIFY MODELS ..................................................................................................................6
FUNCTIONS .............................................................................................................................................7
SPECIFIC SERVICE INSTRUCTIONS ....................................................................................................8
SERVICE ADJUSTMENTS ....................................................................................................................13
¤
STANDARD CIRCUIT DIAGRAM (APPENDIX) .................................................................................. 2-1
PARTS LIST ...........................................................................................................................................35
COPYRIGHT © 2001 VICTOR COMPANY OF JAPAN, LTD.
COLOR TELEVISION
/G
/H
/M
TV
AV-32260
AV-32260
AV-32260
AV-32230
AV-32260
BASIC CHASSIS
AC
/G
/H
/M
No. 51802
Feb. 2001

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Summary of Contents for JVC AV-32230

  • Page 1: Table Of Contents

    AV-32230 AV-32260 SERVICE MANUAL COLOR TELEVISION BASIC CHASSIS AV-32230 AV-32260 AV-32230 AV-32260 AV-32230 AV-32260 RM-C306 RM-C305 [AV-32230] [AV-32260] CONTENTS SPECIFICATIONS ............................2 SAFETY PRECAUTIONS ........................3 FEATURES ..............................5 MAIN DIFFERENCE LIST ........................6 HOW TO IDENTIFY MODELS ........................6 FUNCTIONS .............................7 SPECIFIC SERVICE INSTRUCTIONS ....................8 SERVICE ADJUSTMENTS ........................13...

  • Page 2: Specifications

    41.25MHz (4.5MHz) Color Sub Carrier 3.58MHz ················································································································································································································ Power Input 120V AC, 60Hz Power Consumption 133W [AV-32260], 128W [AV-32230] ················································································································································································································ Picture Tube 32” (80cm) Measured Diagonally High Voltage 31kV±1.3kV (at zero beam current) ················································································································································································································ 2” × 4-3/4” / 5 × 12cm Oval type × 2 Speaker 3W ×...

  • Page 3: Safety Precautions

    AV-32230 AV-32260 SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many circuits 10. Isolation Check and components specially for safety purposes. For continued pro- (Safety for Electrical Shock Hazard) tection, no changes should be made to the original design unless After re-assembling the product, always perform an isolation check authorized in writing by the manufacturer.

  • Page 4: Replacement Of Chip Component

    AV-32230 AV-32260 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 5: Features

    AV-32230 AV-32260 FEATURES • • Full-square CRT (cathode ray tube) reproduces fine textured pic- 3 LINE DIGITAL COMB FILTER circuit improved picture quality. • ture in every detail. Component input terminal for talking best advantage of Component • C bus control utilizes single chip ICs.

  • Page 6: Main Difference List

    A80LJF30X08-G M80JUA061X06 DEG. COIL QQW0086-001 CELD066-002JA HOW TO IDENTIFY MODELS • The difference between AV-32230 , AV-32230 and AV-32230 is in the PICTURE TUBE. As the result of the difference in PICTURE TUBE, the MAIN PWB also differ. Model AV-32230...

  • Page 7: Functions

    FRONT PANEL MENU CHANNEL VOLUME POWER ON TIMER INPUT3 OPERATE VIDEO AUDIO L/MONO R REMOTE CONTROL UNIT (RM-C305-1A) [AV-32260] (RM-C306-1A) [AV-32230] TV CATV TV CATV POWER POWER REAR PANEL CHANNEL ON/MOVE SOURCE FREEZE SWAP INPUT INPUT VIDEO STATUS VIDEO STATUS...

  • Page 8: Specific Service Instructions

    AV-32230 AV-32260 SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY PROCEDURE REMOVING THE REAR COVER REMOVING THE SPEAKER 1. Unplug the power supply cord. • 2. Remove the 11 screws marked A as shown in Fig.1. After removing the rear cover. 3. Withdraw the REAR COVER toward you.
  • Page 9 AV-32230 AV-32260 FRONT CABINET PICTURE TUBE CRT SOCKET PWB SPEAKER (x2) FRONT AV INPUT PWB PIP PWB (Only for AV-32260 model) CLAW MAIN PWB STOPPER (x2) FRONT CONTROL PWB (x2) CLAW (x2) LF PWB REAR COVER AV SELECTOR D (x4)
  • Page 10 AV-32230 AV-32260 REMOVING THE CRT * Replacement of the CRT should be performed by 2 or more persons. • After removing the rear cover, chassis etc., CRT CHANGE TABLE 1. Putting the CRT change table on soft cloth, the CRT change table should also be covered with such soft cloth (shown in Fig.2).
  • Page 11 AV-32230 AV-32260 MEMORY IC REPLACEMENT 1. Memory IC This model use a memory IC. This memory IC stores data for proper operation of the video and deflection circuits. When replacing, be sure to use an IC containing this (initial value) data.
  • Page 12 AV-32230 AV-32260 TABLE 1 (System Constant setting) Setting value Setting item Setting content AV-32230 AV-32260 AV-27F802 AV-32F802 AV-36F802 AV-27F702 AV-32F702 AV-36D502 AV-32D502 AV-27D502 AV-36F702 AV-32230 AV-32260 MODEL AV-32D302 AV-36D302 AV-32D202 AV-36D202 AV-36230 AV-32230 AV-36260 AV-32260 AV-27260 PURITY V-CHIP CAN V-CHIP...

  • Page 13: Service Adjustments

    AV-32230 AV-32260 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 14 AV-32230 AV-32260 ADJUSTMENT LOCATIONS FRONT CONTROL PWB FRONT AV INPUT PWB POWER MENU FRONT FRONT LINE FILTER MAIN PWB CN006 FRONT CN007 FRONT IC702 IC701 CPU CN004 F901 Q511 125V 5A Heatsink R507 J601 CN005 TU001 TU001 UPPER : FOCUS...
  • Page 15 HIGH LIGHT ......This sets the setting values (adjustment values) of the WHITE BALANCE circuit. • RF AFC ........This is used when the RF AFC MODE is verfifed. [Do not adjust/Only for AV-32230 model] • RF AFC1 ........ This is used when the RF AFC1 MODE is verified. [Do not adjust/Only for AV-32260 model] •...
  • Page 16 LOW LIGHT MODE HIGH LEVEL REFERENCE LEVEL LOW LEVEL SYNC HIGH LIGHT MODE BRIGHT I2C BUS CTRL MODE RF AFC MODE (Only for AV-32230 model) [FIXED ON] [DO NOT ADJUST] HIGH LIGHT TOO HIGH GOOD TOO LOW RF AFC FINE...
  • Page 17 AV-32230 AV-32260 (4) Setting method SETTING ITEM 1) UP / DOWN key of the MENU Select the SETTING ITEM. 2) LEFT / RIGHT key of the MENU Setting (adjust) the SETTING VALUE of the SETTING ITEM. When the key is released the SETTING VALUE will be stored (memorized).

  • Page 18: Initial Setting Value Of Service Menu

    AV-32230 AV-32260 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.
  • Page 19 AV-32230 AV-32260 Setting (Adjustment) item Variable range Initial setting value Remark R Y GAIN 000 / 001 CMP R Y GA 000 / 001 G Y PHASE 000 / 001 CMP G Y PH 000 / 001 CD MATRIX 000 — 003 CMP CD MAT 000 —...
  • Page 20 AV-32230 AV-32260 Setting (Adjustment) item Variable range Initial setting value Remark H EHT 000 — 007 BTM PIN 000 — 031 V BLK LOW 000 — 003 V BLK UP 000 — 003 CAPTION IN 000 / 001 H BLK...
  • Page 21 AV-32230 AV-32260 • SOUND MODE Setting (Adjustment) item Variable range Initial setting value Remark NOISE DET. 000 / 001 IN LEVEL 000 — 063 FH MONITOR 000 / 001 STEREO VCO 000 — 063 PILOT CAN. 000 / 001 FILTER 000 —...
  • Page 22 AV-32230 AV-32260 • OTHERS MODE Setting (Adjustment) item Variable range Initial setting value Remark OSD POS. 000 — 007 CCD POS. 000 — 015 EOSEL 000 / 001 MENU COLOR 000 — –030 –010 MENU PICT. 000 — –030 –010 MENU BRI.
  • Page 23 Variable range Initial setting value Remark R DRIVE 0 — 127 B DRIVE 0 — 127 • RF AFC MODE [Only for AV-32230 model] Setting (Adjustment) item Variable range Initial setting value Remark RF AFC ON / OFF DO NOT ADJUST ±...
  • Page 24 AV-32230 AV-32260 ADJUSTMENTS B1 POWER SUPPLY Measuring Item Test point Adjustment part Description instrument Check of DC Voltmeter R507 C504 1. Receive a black-and-white signal. side (B1) 2. Connect the DC Voltmeter to R507 C504 side (B1) and Q511 heatsink...
  • Page 25 AV-32230 AV-32260 ADJUSTMENT OF WHITE BALANCE Measuring Item Test point Adjustment part Description instrument WHITE Signal No.1 BRIGHT Note : BALANCE generator Set VIDEO STATUS to “STANDARD”. (Low Light) R CUTOFF Adjustment G CUTOFF 1. Receive a black-and-white signal.(Color off) B CUTOFF 2.
  • Page 26 AV-32230 AV-32260 Measuring Item Test point Adjustment part Description instrument No.8 P R DR Notes: Signal HIGH LIGHT generator No.10 P B DR • Proceed to the following this adjustment after having completed the adjustments of LOW LIGHT WHITE BALANCE and HIGH LIGHT WHITE WHITE BALANCE for the main picture.
  • Page 27 AV-32230 AV-32260 ADJUSTMENT OF DEFLECTION Measuring Item Test point Adjustment part Description instrument V CENTER and Signal No.68 V CENTER Note: generator No.78 TRAPEZ Proceed to the following this adjustment after having completed the TRAPEZIUM Adjustment adjustments of SUB BRIGHT and SUB CONTRAST.
  • Page 28 AV-32230 AV-32260 Measuring Item Test point Adjustment part Description instrument SIDE PIN and Signal No.76 SIDE PIN Note: generator No.82 TOP PIN Proceed to the following this adjustment after having completed the CORNER PIN Adjsutment No.84 BTM PIN adjustments of FOCUS, SUB BRIGHT, SUB CONTRAST, V CENTER, TRAPEZIUM, V-SIZE and V-LINEARITY.
  • Page 29 3. Set the initial setting value of the No.3. COLOR with the LEFT/RIGHT key of the remote control unit. A (Vw- AV-32260 , AV-32230 4. Connect the oscilloscope between TP-B and TP-E. AV-32260 , AV-32230 5. Adjust COLOR and bring the value of (A) in the illustration to the...
  • Page 30 AV-32230 AV-32260 ADJUSTMENT OF MTS CIRCUIT Measuring Item Test point Adjustment part Description instrument No.2 IN LEVEL 1. Select the No.2 IN LEVEL of the SOUND MODE. MTS INPUT LEVEL 2. Verify that the No.2 IN LEVEL is set at its initial setting value.
  • Page 31 AV-32230 AV-32260 ADJUSTMENTS OF PURITY AND CONVERGENCE 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 PURITY ADJUSTMENT 1.
  • Page 32 AV-32230 AV-32260 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). (FRONT VIEW) 3. Using 6-pole convergence magnets, overlap the magenta(red/blue) and green lines in the center of the screen and turn them to white.
  • Page 33 AV-32230 AV-32260 HOW TO CHECK THE HIGH VOLTAGE HOLD DOWN CIRCUIT 1. HIGH VOLTAGE HOLD DOWN CIRCUIT After repairing the high voltage hold down circuit shown in Fig. 1. This circuit shall be checked to operate correctly. 2. CHECKING OF THE HIGH VOLTAGE HOLD DOWN CIRCUIT (1) Turn the POWER SW ON.
  • Page 34 AV-32230 AV-32260 SELF CHECK FUNCTIONS 1. Outline This model has self check functions given below. When a malfunction has been detected, the POWER is turned off and the LED flashes to inform of the failure . The malfunction is detected by the signal input state of the control line connected to the microcomputer.

  • Page 35: Parts List

    JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. Head office : 1700 Valley Road, Wayne, New Jersey 07470 (973)315-5000 East Coast : 10 New Maple Avenue, Pine Brook, New Jersey 07058 (973)396-1000 Midwest 705 Enterprise St. Aurora, Illinois 60504...

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Av-32260

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