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JVC AV-28KT1BUF/A Service Manual

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SERVICE MANUAL
9
2003
52137
AV-28KT1BUF
AV-28KT1SUF
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
COLOUR TELEVISION
TV
RM-C1100

TABLE OF CONTENTS

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No.52137
2003/9

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  Summary of Contents for JVC AV-28KT1BUF/A

  • Page 1: Table Of Contents

    SERVICE MANUAL COLOUR TELEVISION 52137 2003 AV-28KT1BUF AV-28KT1SUF RM-C1100 TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2: Ve-30017763 (Rm-C1100), (Aa/R06 Dry

    SPECIFICATION Items Contents Dimensions ( W × H × D ) 76cm × 57cm × 47.3cm Mass 33kg TV RF System B/G, D/K, L/L' Colour System TV Mode PAL / SECAM Video Mode PAL / SECAM / NTSC 3.58 / NTSC 4.43 Sound System NICAM / A2 (Germany system) Teletext System...
  • Page 3: Precaution

    SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware, (8) When service is required, observe the original lead dress. many circuits and components specially for safety Extra precaution should be given to assure correct lead purposes.
  • Page 4: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 21-pin Euro connector (SCART) : EXT-1 / EXT-2 Pin No. Signal Designation Matching Value EXT-1 EXT-2 AUDIO R output 500mV(rms) (Nominal), Low impedance Used Used AUDIO R input 500mV(rms) (Nominal), High impedance Used (R1) Used (R2) AUDIO L output 500mV(rms) (Nominal), Low impedance Used Used...
  • Page 5 VE-20121492 VE-20119985 BACK COVER VE-20121494 VE-20111863 BACK DOOR VE-20108124 VE-20120043 FUNCTION BUTTON VE-20091798 VE-20096498 POWER BUTTON VE-20111864 VE-20120046 JVC LOGO VE-40013592 VE-40013593 CARTON BOX VE-50038917 VE-50038907 DIFFERENCE LIST BY ELECTRONICS AV-28KT1BUF/A AV-28KT1BUF/B AV-28KT1BUF/C Part Name AV-28KT1SUF/A AV-28KT1SUF/B AV-28KT1SUF/C MAIN PWB...
  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDULE 3.1.1 REMOVING THE REAR COVER 3.1.9 CHECKING THE PW BOARD (1) Unplug the power cord. • To check the back side of the PW Board. (2) Remove the 8 screws [A] as shown in the Fig. 1. (1) Pull out the PW Board.
  • Page 7 REAR COVER MAIN PWB BASE BACK DOOR CRT SOCKET PWB SIDE CONTROL SPEAKER LED PWB POWER SWITCH PWB Fig.1 (No.52137)1-7...
  • Page 8 REPLACEMENT OF CHIP COMPONENT 3.2.1 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. 3.2.2 SOLDERING IRON (1) Use a high insulation soldering iron with a thin pointed end of it.
  • Page 9 SETTING OF THE LAST MEMORY FOR SHIPMENT 3.3.1 USER SETTING VALUES Setting Item Setting Value Setting Item Setting Value SOUND MENU FEATURE MENU BALANCE CENTER SLEEP TIMER BASS CENTER CHILD LOCK TREBLE CENTER LANGUAGE ENGLISH HYPER SOUND EXT-2 OUTPUT PICTURE MENU BLUE BACKGROUND BRIGHTNESS These adjust are automatically...
  • Page 10: Adjustment

    SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION Setting Item Setting value (1) You can make the necessary adjustments for this unit with BRIGHTNESS CENTER either the Remote Control Unit or with the adjustment tools CONTRAST and parts as given below. (2) Adjustment with the Remote Control Unit is made on the COLOUR basis of the initial setting values, however, the new setting SHARPNESS...
  • Page 11 BASIC OPERATION OF SERVICE MENU 4.5.1 HOW TO ENTER THE SERVICE MENU REMOTE CONTROL UNIT key NAME (1) Press the [INFORMATION] key and [MUTING] key simultaneously in the main menu, and the SERVICE MENU screen (Fig.1) will be displayed. SERVICE MENU MUTING key SERVICE ADJUST...
  • Page 12: Do Not Adjust

    4.5.4 SERVICE MENU SCREEN SERVICE MENU SERVICE ADJUST... AK45JA*** OPTIONS... AK45JA*** ADJUST MENU ADJUST... SETTING ITEM No. SETTING VALUE 000~143 Do Not Adjust OPTIONS MENU OPTIONS.. ******** ******** ******** ******** ******** ******** ******** ******** ******** ******** SETTING ITEM No. SETTING VALUE 000~063 NOTE: Do not adjust the OPTIONS MENU.
  • Page 13 ADJUSTMENT ITEM adjustment No. adjustment part description White Point RED Not used White Point GREEN Not used Whit Point BLUE Not used AGC (Automatic Gain Control) IF-PLL Negative Not used IF-PLL Positive Not used Y-Delay Y-Delay SECAM Y-Delay NTSC Y-Delay OTHER Not used Vertical Position Offset Fixed...
  • Page 14 adjustment No. adjustment part description PANORAMIC HORZ_AMPL Not used 14:9 ZOOM VERT_POS Not used 14:9 ZOOM VERT_AMPL Not used 14:9 ZOOM VERT_SCOR Not used 14:9 ZOOM VERT_SSYM Not used 14:9 ZOOM TRAPEZE Not used 14:9 ZOOM CUSHION Not used 14:9 ZOOM HOR_COR_SYM Not used 14:9 ZOOM HOR_CORNER Not used...
  • Page 15 adjustment No. adjustment part description G2_WDR_REFERENCE Fixed POFS2 (RGB HORIZANTAL SHIFT) REFERENCE WDR RED COOL REFERENCE WDR GREEN COOL REFERENCE WDR BLUE COOL REFERENCE WDR RED WARM REFERENCE WDR GREEN WARM REFERENCE WDR BLUE WARM STANDARD MODE BRIGHTNESS STANDARD MODE COLOUR STANDARD MODE CONTRAST FULL VERT_POS (16:9 MODE) FULL VERT_AMPL...
  • Page 16 ADJUSTMENT PROCEDURE 4.6.1 FOCUS / SCREEN ADJUSTMENT Measuring Item Test point Adjustment part Description instrument FOCUS Signal FOCUS VR (1) Receive a PAL cross-hatch signal. adjustment generator [On the FBT] (2) Adjust FOCUS VR on the FBT as thin as possible. Remote control unit FOCUS VR...
  • Page 17 4.6.3 DEFLECTION CIRCUIT ADJUSTMENT Measuring Item Test point Adjustment part Description instrument VERTICAL Signal (1) Receive a PAL circle pattern signal. POSITION generator (2) Enter the SERVICE MENU. adjustment 110 (16:9 mode) (3) Select ADJUST MENU. Remote (4) Select 030. control unit (5) Adjust 030 to make A=B.
  • Page 18 Measuring Item Test point Adjustment part Description instrument HORIZONTAL Signal (1) Receive a PAL circle pattern signal. POSITION generator (2) Enter the SERVICE MENU. adjustment 118 (16:9 mode) (3) Select ADJUST MENU. Remote (4) Select 038. control unit (5) Adjust 038 to make C=D. (6) Check and readjust 038 item if the adjustment becomes improper after some other geometric adjustments are done.
  • Page 19 Measuring Item Test point Adjustment part Description instrument Signal (1) Receive a PAL cross-hatch signal. adjustment generator (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. Remote (4) Select 017. control unit (5) Adjust 017 till the vertical lines become straight. (6) Check and readjust 017 item if the adjustment becomes improper after some other geometric adjustments are done.
  • Page 20 Measuring Item Test point Adjustment part Description instrument CORNER Signal (1) Receive a PAL cross-hatch signal. adjustment generator (2) Enter the SERVICE MENU. (3) Select ADJUST MENU. Remote (4) Select 036. control unit 116 (16:9 mode) (5) Adjust 036 till vertical lines at the upper corners of the picture frame become vertical and parallel to 117 (16:9 mode) vertical corner sides of picture tube.
  • Page 21 Measuring Item Test point Adjustment part Description instrument NTSC Signal (1) Receive a NTSC cross-hatch signal. SIDE PIN generator (2) Enter the SERVICE MENU. adjustment (3) Select ADJUST MENU. Remote (4) Select 136. control unit (5) Adjust 136 till vertical lines close to the both sides of the picture frame become parallel to vertical sides of picture tube without any bending to left or to right Parallel...
  • Page 22 4.6.4 VIDEO CIRCUIT Measuring Item Test point Adjustment part Description instrument WHITE Signal (1) Receive a PAL black & white signal. BALANCE generator (2) Enter the SERVICE MENU. adjustment (3) Select ADJUST MENU. Remote (4) Select 023, 024 and 025 respectively. control unit (5) Adjust 023, 024 and 025 respectively, until the white part turns to pure white without any other colour.
  • Page 23: Troubleshooting

    SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. (No.52137)1-23...
  • Page 24 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.52137) Printed in Japan...