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JVC AV-28R47SK Service Manual

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SERVICE MANUAL
3
2004
YA061
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5
TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
COLOR TELEVISION
AV-28R47SK,
AV-32R47SK
1
2
3
4
5
6
7
8
9
0
AV
MENU
P
TV
OK
P
TV

TABLE OF CONTENTS

COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
BASIC CHASSIS
JW
No.YA061
2004/3

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Summary of Contents for JVC AV-28R47SK

  • Page 1: Table Of Contents

    SERVICE MANUAL COLOR TELEVISION YA061 2004 AV-28R47SK, AV-32R47SK BASIC CHASSIS MENU TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Contents Items AV-28R47SK AV-32R47SK Dimensions ( W × H × D ) 76.2cm × 52.8cm × 49.3cm 86.4cm × 58.7cm × 55.0cm Mass 39.0kg 53.0kg TV RF System CCIR ( I ) Colour System NTSC3.58 / NTSC4.43 (Only EXT mode)

  • Page 3: Precaution

    SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware and 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.

  • Page 4: Specific Service Instructions

    (Negative sync), 75Ω Used Used Used (P-P) COMMON GND Used Used Used (P-P= Peak to Peak, B-W= Blanking to white peak) [Pin assignment] 18 16 12 10 19 17 13 11 2.3 MAIN DIFFERENCE LIST Item AV-28R47SK AV-32R47SK PICTURE TILT 1-4 (No.YA061)
  • Page 5 TECHNINAL INFORMATION 2.4.1 MAIN MI-COM (CPU) PIN FUNCTION Pin name Function Pin name Function VssP2 -- GND 65 SVM O Scan velocity modulation VssC4 -- GND 66 FbiSo H pulse (Flyback pulse) V1.8C4 1.8V 67 Hout O H drive V3.3A3 3.3V 68 VssComb -- GND...

  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER 3.1.9 REMOVING THE CENTER SPEAKER (1) Unplug the power cord. • Remove the REAR COVER. (2) Remove the 13 screws [A] as shown in the Fig. 3. • Remove the CHASSIS. (3) Withdraw the REAR COVER toward you.
  • Page 7 FRONT CABINET MAIN SPEAKER CRT SOCKET FRONT CONTROL CENTER SPEAKER SPEAKER GRIL POWER & DEF PWB CLAW CHASSIS BASE CN810K SPACER CONTROL CN810F BASE CN810S AV JACK PWB AV TERMINAL BOARD CLAW MAIN PWB SIDE CONTROL JACK ASS'Y DOLBY PWB REAR COVER POWER CORD Fig.3...
  • Page 8 3.1.13 REMOVING THE CRT NOTE: 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 APPROX.
  • Page 9 INSTRUCTIONS and set the items as described. 7. SERVICE MENU setting FUNCTION UP/DOWN Verify what to set in the SERVICE MENU, and set whatever is necessary (Fig.1). Refer to the SERVICE ADJUSTMENT for setting. FUNCTION -/+ 3.2.2 SYSTEM CONSTANT SETTING Setting data Address AV-28R47SK AV-32R47SK (No.YA061)1-9...
  • Page 10 3.2.3 SETTINGS OF FACTORY SHIPMENT 3.2.3.1 BUTTON OPERATION 3.2.3.2 REMOTE CONTROL DIRECT OPERATION Setting item Setting position Setting item Setting position POWER CHANNEL CHANNEL VOLUME VOLUME ZOOM PANORAMIC SURROUND 3.2.3.3 REMOTE CONTROL MENU OPERATION (1) PICTURE (3) FEATURES Setting item Setting position Setting item Setting position...
  • Page 11 3.2.4 SERVICE MENU SETING ITEMS Setting item Setting value Setting item Setting value 1. IF 1. VCO 5. VSM PRESET BRIGHT/SOFT/STD COOL/WARM/NOMAL 2. DELAY POINT 1.BRIGHT 1. R DRIVE 2.CONT. 2. G DRIVE 3.COLOUR 3. B DRIVE 4.SHARP 5.HUE 2. V / C 1.SCREEN 6.VPS 2.CUTOFF R / G...
  • Page 12 REPLACEMENT OF CHIP COMPONENT 3.3.1 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. 3.3.2 SOLDERING IRON (1) Use a high insulation soldering iron with a thin pointed end of it.

  • Page 13: Adjustment

    SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION MEASURING INSTRUMENT AND FIXTURES (1) There are 2 ways of adjusting this TV : One is with the (1) DC voltmeter (or digital voltmeter) REMOTE CONTROL UNIT and the other is the (2) Oscilloscope conventional method using adjustment parts and (3) Signal generator components.
  • Page 14 SPEAKER DOLBY TUNER CN002 CN001 CN003 1 B1 AV JACK IC702 2 N.C. 3 X-ray 4 X-ray 5 GND CN009 MEMORY AV-28R47SK AV-32R47SK CRT SOCKET PWB (SOLDER SIDE) TP-47B FOCUS1 TP-47R FOCUS1 TP-E FOCUS2 SCREEN SCREEN TP-47G CN3009 CN3008 1-14 (No.YA061)
  • Page 15 BASIC OPERATION OF SERVICE MENU 4.6.1 TOOL OF SERVICE MENU OPERATION Operate the SERVICE MENU with the REMOTE CONTROL UNIT. 4.6.2 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 This mode adjusts the setting values of the IF circuit.
  • Page 16 4.6.4 SERVICE MENU FLOW CHART SERVICE MENU SERVICE MENU 1. IF 2. V/C 3. AUDIO 4. DEF 5. VSM PRESET 6. VPS 7. SHIPPING (OFF) 4. DEF 1.IF 1.VCO IF SERVICE MENU VCO (CW) ** , ** MHz 1. V-SHIFT FULL 50Hz TOO HIGH...
  • Page 17 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 displays on the screen in its optimum condition may differ from the initial setting value. (2) Do not change the initial setting values of the items not listed in “ADJUSTMENT PROCEDURE”.
  • Page 18 4.7.3 [4. DEF] Setting value Variable Setting item FULL PANORAMIC SUBTITLE 14:9 ZOOM REGULAR COMPRESS range 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 50Hz 60Hz 1.V-SHIFT -32~+31 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0 ±0 2.V-SLOPE -32~+31 ±0 ±0...
  • Page 19 ADJUSTMENT PROCEDURE 4.8.1 CHECK ITEM Measuring Item Test point Adjustment part Description instrument B1 POWER Signal X connector [2.V/C] (1) Receive the any broadcast. SUPPLY generator TP-91(B1) 12.RGB BLK (2) Select 2. V/C from the SERVICE MENU. check TP-E (3) Select < 12. RGB BLK >. DC voltmeter [POWER DEF (4) Press the [FUNCTION + ( )] key to find the cut off...
  • Page 20 Fig.1 FOCUS Signal FOCUS VR (1) Receive the crosshatch signal. [AV-28R47SK] generator [In HVT] (2) Set the ZOOM mode to FULL. (3) While looking at the screen, adjust the FOCUS VR to the vertical and horizontal lines will be clear and infine detail.
  • Page 21 4.8.3 DEFLECTION CIRCUIT There are 6 aspect modes ( 1.FULL, 2.PANORAMIC, 3.SUBTITLE, 4.14:9 ZOOM 5.REGULAR 6.COMPRESS) of the adjustment. Depending upon the kind of signals. NOTE : • At first the adjustment in 50Hz FULL mode should be done, then the data for the other aspect mode is corrected in the respective value at the same time.
  • Page 22 Measuring Item Test point Adjustment part Description instrument H. POSITION Signal [4.DEF] (1) Receive the circle pattern signal. generator 4.H-CENT (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. Remote (4) Select < 4.H-CENT >. control unit (5) Set the initial setting value of <...
  • Page 23 Measuring Item Test point Adjustment part Description instrument TRAPEZIUM Signal [4.DEF] (1) Receive the crosshatch signal. generator 6.TRAPEZ (2) Set the ZOOM mode to FULL. (3) Select 4.DEF from the SERVICE MENU. Remote (4) Select < 6.TRAPEZ >. control unit (5) Set the initial setting value of <...
  • Page 24 Measuring Item Test point Adjustment part Description instrument Signal [4.DEF] • In case where there is a bow-shaped distortion of generator 11.BOW images on the screen. (1) Receive the crosshatch signal. Remote (2) Set the ZOOM mode to FULL. control unit (3) Select 4.DEF from the SERVICE MENU.
  • Page 25 4.8.4 VIDEO CIRCUIT Measuring Item Test point Adjustment part Description instrument WHITE Signal [2. V/C] (1) Receive the black and white signal (colour off). (2) Set the ZOOM mode to FULL. BALANCE generator 2.CUTOFF R / G (3) Set the PICTURE mode to STD. 3.WDR R / G / B (4) Set the COLURTEMP.
  • Page 26 Measuring Item Test point Adjustment part Description instrument SUB COLOUR-2 Signal TP-47B [2.V/C] [Method of adjustment using measuring instrument] generator TP-E 6.COLOUR PAL COLOUR [CRT SOCKET (PAL/NTSC) (1) Receive the PAL full field colour bar signal (75% Oscilloscope PWB ] white).
  • Page 27 Measuring Item Test point Adjustment part Description instrument SUB HUE-2 Signal TP-47B [2.V/C] [Method of adjustment using measuring instrument] generator TP-E 7.HUE NTSC 3.58 HUE [CRT SOCKET (1) Input the NTSC 3.58MHz signal (full field colour Oscilloscope PWB] bar with 75% white) from the EXT terminal. (2) Set the ZOOM mode to FULL.

  • Page 28: Trouble Shooting

    SECTION 5 TROUBLE SHOOTING This service manual does not describe TROUBLE SHOOTING. 1-28 (No.YA061)
  • 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.YA061) Printed in Japan...

This manual is also suitable for:

Av-32r47sk