JVC AV-21BF11ENS Service Manual
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JVC AV-21BF11ENS Service Manual

JVC AV-21BF11ENS Service Manual

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SERVICE MANUAL
CONTENTS
! SPECIFICATIONS ･････････････････ ･･･
･･･････ ･･････････ ･･･ 2
･･･････ ･･････････ ･･･
･･･････ ･･････････ ･･･
! SAFETY PRECAUTIONS ･･･････ ･･･････
! FEATURES ･･･ ･･ ･････････････････････
･･･ ･･ ･･････････ ････････ ･･･ 5
･･･ ･･ ･････････････････････
･･･ ･･ ･･････････ ････････ ･･･
! MAIN DIFFERENCE LIST ･････････････ ･
1
COLOUR TELEVISION
AV-21BF11EES
AV-21BF11EPS
AV-21BF11EJS
･････････ ･････4
･･･････ ･･･････
･････････ ･････
･･･ ･･･････････ 5
･････････････ ･
･･･ ･･･････････
CO PYRIGHT © 2002 VICTOR COMPANY OF JAPAN, LTD.
! SERVICE ADJUSTMENTS･･･ ････ ･････
! PARTS LIST ･･･ ････ ････ ･･ ････ ････ ･･
･･ ･ ･･ ････ ････ ･･ ････ ････ 21
･･ ･ ･･ ････ ････ ･･ ････ ････
･･･ ････ ････ ･･ ････ ････ ･･
★ OPERATING INSTRUCTIONS
★ STANDARD CIRCUIT DIAGRAM ･･ ･･･ ･･
AV- 21BF11ENS
･･ ･ ･ 6
･･･ ･
･･ ･ ･
･･ ･･･ ････ ･･ ･ 11
･･･ ････ ･････
･･ ･･･ ････ ･･ ･
･･･ ････ 2-1
･･ ･･･ ･･
･･･ ････
No.52055
Jul. 2002

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Summary of Contents for JVC AV-21BF11ENS

  • Page 1: Table Of Contents

    AV- 21BF11ENS AV- 21BF11EES AV- 21BF11EPS AV- 21BF11EJS SERVICE MANUAL COLOUR TELEVISION AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS CONTENTS ! SPECIFICATIONS ･････････････････ ･･･ ･･･････ ･･････････ ･･･ 2 ! SPECIFIC SERVICE INSTRUCTIONS ･･･ ･ ･･ ･ ･ 6 ･･･････ ･･････････ ･･･ ･･･････ ･･････････ ･･･...

  • Page 2: Specifications

    AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS SPECIFICATIONS Content Item AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS Dimensions ( W× × × × H× × × × D ) 600mm× 448mm×476mm Mass 22.2kg TV RF System B/G , D/K , K1 B/G , L/L’ I/I’ Colour System...
  • Page 3 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS ■ ■ ■ ■ 21-pin Euro connector (SCART socket) : AV-1 / AV-2 (P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak) Pin No. Signal Designation Matching Value AV-1 AV-2 2 2 2...

  • Page 4: Safety Precautions

    AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS SAFETY PRECAUTIONS 1. The design of this product contains special hardware, many 9. Isolation Check circuits and components specially for safety purposes. For (Safety for Electrical Shock Hazard) continued protection, no changes should be made to the original After re-ass embling the product, always perform an isolation design unless authorized in writing by the manufacturer.

  • Page 5: Features

    AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS FEATURES 1. It is a remote controlled color television. 9. It is possible to connec t headphone. 2. 100 programs from VHF, UHF bands or cable channels can be 10. Direct channel acc ess. pres et.

  • Page 6: Specific Service Instructions

    AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY PROCEDURE CHECKING THE PW BOARD REMOVING THE REAR COVER To check the back side of the PW Board. 1. Unplug the power c ord. 1) Pull out the PW Board. (Refer to REMOVING THE MAIN 2.
  • Page 7 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS (×6) REAR COVER (×1) MAIN PWB SPEAKER (×2) (×1) FRONT AV & HEADPHONE PWB FRONT CABINET Fig. 1 No.52055...
  • Page 8 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS 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 c hip part, melt the s older adequately.
  • Page 9 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS MEMORY IC REPLACEMENT 1. Memory IC This model use a memory IC. SERVICE MENU This memory IC stores data for proper operation of the video and deflection circuits. When replacing, be s ure to use an IC containing this (initial value) data.
  • Page 10 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS SETTING OF THE LAST MEMORY FOR SHIPMENT ■ ■ ■ ■ USER SETTING VALUES Setting Item Setting Value Setting Item Setting Value SOUND MENU FEATURE MENU BALANCE CENTER SLEEP TIMER ↑ BASS CHILD LOCK ↑ TREBLE...

  • Page 11: Service Adjustments

    AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS SERVICE ADJUSTMENTS ADJUSTMENT PREPARATION 1. You can make the necessary adjustments for this unit with 6. Never touc h any adjustment parts which are not spec ified in the either the Rem ote Control Unit or with the adjustment tools list for this adjustment - variable res istors, transformers, and par ts as given below.
  • Page 12 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS BASIC OPERATION SERVICE MENU ■ ■ ■ ■ HOW TO ENTER THE SERVICE MENU 1) Press the MENU key. REMOTE CONTROL UNIT key NAME 2) MENU sc reen of fig.1 will be displayed MENU SCREEN MENU...
  • Page 13 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS ■ ADJUSTMENT ITEM & INITIAL (Recommended) SETTING VALUE in the SERVICE MENU ADJUSTMENT DESCRIPTION INITIAL VALUE ITEM HORIZONTAL POSITION OF OSD IF COARSE ADJUSTMENT IF FINE ADJUSTMENT IF COARSE ADJUSTMENT FOR L-PRIME IF FINE ADJUSTMENT FOR L-PRIME...
  • Page 14 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS ■ ADJUSTMENT ITEM & INITIAL (Recommended) SETTING VALUE in the SERVICE MENU ADJUSTMENT DESCRIPTION INITIAL VALUE ITEM PERIPHERAL OPTIONS 01110101 RECEPTION STANDARD OPTIONS 00001001 (EN) 01001001 (EP) 00011001 (EE) 00100001 (EJ) VIDEO OPTIONS 01101101 (EN) 11101101 (EP/EE/EJ)
  • Page 15 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS ADJUSTMENTS ■ ■ ■ ■ SCREEN ADJUSTMENT Measuring Item Test point Ad justment part Description instrument SCREEN Remote SCREEN VR 1. Enter SERVICE MENU. adjustment control unit [On the FBT] 2. Press YELLOW key to disable vertic al s can.
  • Page 16 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS ■ ■ ■ ■ AGC AUTOMATICALLY ADJUSTMENT Measuring Item Test point Ad justment part Description instrument Remote 1. Enter SERVICE MENU. AUTOMATIC- control unit 2. Receive a 60dBμV RF signal level. AL LY 3. Select AGC with the FUNCTION ( / ) key.
  • Page 17 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS Measuring Item Test point Ad justment part Description instruments VERTICAL Signal VSOF 1. Receive a NTSC-M cross-hatch pattern of vertic al frequency SIZ E OFFSET gener ator 60Hz. adjustment 2. Enter SERVICE MENU. (60Hz) Remote 3. Select VSOF(Vertical size) with the FUNCTION ( / ) key.
  • Page 18 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS ■ ■ ■ ■ GEOMETRY MENU ADJUSTMENT Measuring Item Test point Ad justment part Description instruments VERTICAL Signal VSIZ 1. Receive a PAL B/G cross-hatch pattern of vertical frequenc y SIZ E gener ator 50Hz. adjustment 2.
  • Page 19 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS ■ ■ ■ ■ WHITE BALANCE ADJUSTMENT Measuring Item Test point Ad justment part Description instrument WHITE Signal 1. Receive a black & white signal (colour off). BALANCE gener ator 2. Enter SERVICE MENU. adjustment 3. Select WR / WG / WB with the ( / ) key, res pectively.
  • Page 20 AV-21BF11ENS AV-21BF11EES AV-21BF11EPS AV-21BF11EJS [MEMO] No. 52055...

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