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JVC AV-21KT1BEF Service Manual
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JVC AV-21KT1BEF Service Manual

JVC AV-21KT1BEF Service Manual

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SERVICE MANUAL
2003
10
52134
AV-21KT1BEF
AV-21KT1BNF
AV-21KT1BPF
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
COLOUR TELEVISION
,
/A
,
/A
,
/A
TV
RM-C1100

TABLE OF CONTENTS

, AV-21KT1SEF
/B
, AV-21KT1SNF
/B
, AV-21KT1SPF
/B
,
,
/A
/B
,
,
/A
/B
,
/A
/B
No.52134
2003/10

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Summary of Contents for JVC AV-21KT1BEF

  • Page 1: Table Of Contents

    SERVICE MANUAL COLOUR TELEVISION 52134 2003 AV-21KT1BEF , AV-21KT1SEF AV-21KT1BNF , AV-21KT1SNF AV-21KT1BPF , AV-21KT1SPF RM-C1100 TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Content Item AV-21KT1BEF AV-21KT1BNF AV-21KT1BPF AV-21KT1SEF AV-21KT1SNF AV-21KT1SPF Dimensions ( W × H × D ) 61cm × 45cm × 48cm Mass 21kg TV RF System B/G, D/K, K1 B/G, L/L' Colour System TV Mode PAL / SECAM PAL / SECAM Video Mode PAL / SECAM / NTSC 3.58 /...

  • 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) : AV-1 / AV-2 (AV-2S) Pin No. Signal Designation Matching Value AV-1 AV-2 (AV-2S) 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...
  • Page 5 • 5 minutes after the broadcasting (closedown), the TV switches • Full function Teletext (Fastext, Toptext). itself automatically to stand-by mode. MAIN DIFFERENCE LIST Part Name [/A models] [/B models] Model name AV-21KT1BEF/A AV-21KT1BEF/B AV-21KT1BNF/A AV-21KT1BNF/B AV-21KT1BPF/A AV-21KT1BPF/B AV-21KT1SEF/A AV-21KT1SEF/B...

  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER 3.1.6 CHECKING THE PW BOARD (1) Unplug the power cord. • To check the back side of the PW Board. (2) Remove the 7 screws [A] as shown in the Fig. 1. (1) Pull out the PW Board.
  • Page 7 (X7) REAR COVER SPEAKER (X4) MAIN PWB (X4) (X1) (X2) HEADPHONE FRONT AV PWB FRONT CABINET Fig.1 (No.52134)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 REPLACEMENT OF MEMORY IC 3.3.1 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. 3.3.2 PROCEDURE FOR REPLACING MEMORY IC SERVICE MENU 1.
  • Page 10 SETTING OF THE LAST MEMORY FOR SHIPMENT 3.4.1 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 MODE STEREO AV-2 OUTPUT EFFECT PICTURE MENU INSTALL BRIGHTNESS...

  • Page 11: Adjustment

    SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION (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 12 BASIC OPERATION OF SERVICE MENU 4.5.4 HOW TO ENTER THE GEOMETRY MENU • This model is built-in GEOMETRY MENU for geometry 4.5.1 HOW TO ENTER SERVICE MENU adjustment. (1) Press the MENU key. (1) Enter the SERVICE MENU (2) MENU screen of (fig.1) will be displayed. (2) Press the [GREEN] key, geometry menu appears (Fig.3).
  • Page 13 4.5.5 ADJUSTMENT ITEM ADJUSTMENT ITEM DESCRIPTION HORIZONTAL POSITION OF OSD IF COARSE ADJUSTMENT IF FINE ADJUSTMENT IF COARSE ADJUSTMENT FOR L-PRIME IF FINE ADJUSTMENT FOR L-PRIME AUTOMATIC GAIN CONTROL VLIN VERTICAL LINEARITY RGBH RGB MODE HORIZONTAL SHIFT OFFSET VSOF VERTICAL SIZE OFFSET for 60Hz VPOF VERTICAL POSITION OFFSET for 60Hz HSOF...
  • Page 14 4.5.6 GEOMETRY MENU ADJUSTMENT ITEM DESCRIPTION VSIZ VERTICAL SIZE for 50Hz VPOS VERTICAL POSITION for 50Hz VSCO VERTICAL S-CORRECTION for 50Hz VCCO VERTICAL CORNER CORRECTION for 50Hz HSIZ HORIZONTAL SIZE for 50Hz HPOS HORIZONTAL POSITION for 50Hz HPIN HORIZONTAL PINCUSHION for 50Hz HCCO HORIZONTAL CORNER CORRECTION for 50H HTRP...
  • Page 15 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 16 4.6.3 IF ADJUSTMENT Measuring Item Test point Adjustment part Description instrument IF adjustment Remote IF 1 (1) Receive a PAL colour bar pattern. control unit IF 2 (2) Enter the SERVICE MENU. IF 3 (3) Select IF 1 with the [ / ] key IF 4 (4) Press [BLUE] key during IF 1 is highlighted, IF 1 and IF 2 values are adjusted automatically by software.
  • Page 17 Measuring Item Test point Adjustment part Description instrument RGB MODE Signal RGBH (1) Input R/G/B circle pattern signal via video input HORIZONTAL generator terminal. SHIFT (2) Press [AV] key on the remote control unit, force the adjustment Remote TV to RGB mode. control unit (3) Enter the SERVICE MENU.
  • Page 18 Measuring Item Test point Adjustment part Description instrument HORIZONTAL Signal HPOF (1) Receive a NTSC-M circle pattern signal of vertical POSITION generator frequency 60Hz. OFFSET (2) Enter the SERVICE MENU. adjustment Remote (3) Select HPOF with the [ / ] key. (60Hz) control unit (4) Adjust HPOF with the [ / ] key until the circle...
  • Page 19 Measuring Item Test point Adjustment part Description instrument HORIZONTAL Signal HPOS (1) Receive a PAL B/G circle pattern signal of vertical POSITION generator frequency 50Hz. OFFSET (2) Enter the GEOMETRY MENU. adjustment Remote (3) Select HPOS (Horizontal position) with the [ / ] (50Hz) control unit key.

  • Page 20: Troubleshooting

    SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. 1-20 (No.52134)
  • Page 21 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.52134) Printed in Japan...

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