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JVC AV-21RM4SE Service Manual

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SERVICE MANUAL
3
2005
YA080B
AV-20RM4SE, AV-21RM4SE,
AV-21RM4SN, AV-21RM4SP
The following items for the AV-20RM4SE, AV-21RM4SE, AV-21RM4SN and AV-21RM4SP were changed
partly.
Therefore, this service manual describes only the items which differ from those of the AV-20RM4SE, AV-
21RM4SE, AV-21RM4SN and AV-21RM4SP service manual.
For details other than those described in this manual, please refer to the AV-20RM4SE, AV-21RM4SE, AV-
21RM4SN and AV-21RM4SP service manual (No.52056, 2005/2).
DIFFERENCE LIST
PRINTED WIRING BOARD PARTS LIST
MAIN P.W. BOARD ASS'Y
Ref. No.
BEFORE
TU201
VE-30009637
COLOUR TELEVISION
Supplementary
Part No.
AFTER
VE-30033888
TUNER
COPYRIGHT © 2005 Victor Company of Japan, Limited
PART NAME
Non compatible
DESCRIPTION
No.YA080B
2005/3

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  • Page 1 Therefore, this service manual describes only the items which differ from those of the AV-20RM4SE, AV- 21RM4SE, AV-21RM4SN and AV-21RM4SP service manual. For details other than those described in this manual, please refer to the AV-20RM4SE, AV-21RM4SE, AV- 21RM4SN and AV-21RM4SP service manual (No.52056, 2005/2).
  • Page 2 SECTION 1 PRECAUTION Please refer to "AV-20RM4SE, AV-21RM4SE, AV-21RM4SN and AV-21RM4SP (No.YA080)" about this section. SECTION 2 SPECIFIC SERVICE INSTRUCTIONS Please refer to "AV-20RM4SE, AV-21RM4SE, AV-21RM4SN and AV-21RM4SP (No.YA080)" about this section. SECTION 3 DISASSEMBLY Please refer to "AV-20RM4SE, AV-21RM4SE, AV-21RM4SN and AV-21RM4SP (No.YA080)" about this section.
  • Page 3 [ ]/[ ] key JVCAK30/37 B23 FUNCTION SCP2 018 [ ]/[ ] key SEC2 017 00001101 00010010 00010010 00010010 00010010 00010010 00010010 > 0 3 76543210 Fig.2 SECTION 5 TROUBLESHOOTING Please refer to "AV-20RM4SE, AV-21RM4SE, AV-21RM4SN and AV-21RM4SP (No.YA080)" about this section. (No.YA080B)1-3...
  • Page 4 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.YA080B) Printed in Japan...

  • Page 5: Table Of Contents

    AV- 25BT6ENS AV- 25BT6ENB SERVICE MANUAL COLOUR TELEVISION AV25BT6ENS AV25BT6ENB CONTENTS ! SPECIFICATIONS ･････････････････ ･･････････ ･･･ ･･ ･･･ ･･････ ････ ･･････ ････ ･･････ 2 ･･･････ ･･････････ ･･････････ ･･ ･･･ ･･ ･･･ ･･ ････ ････ ･･ ････ ････ ･･ ･･ ･･･････ ･･････････ ･･････････ ･･ ･･･ ･･･････...

  • Page 6: Specifications

    AV-25BT6ENS AV-25BT6ENB SPECIFICATIONS Content ITEM AV-25BT 6EN S (Silver) AV-25BT 6EN B (Black) Dimensions ( WxHxD) 69 cm x 54 cm x 47 cm Weight 27 kg TV RF System TV Mode Colour System Video Mode PAL / NTSC 3.58 / NTSC 4.43 Teletext System Fastext / Toptext Stereo System...
  • Page 7 AV-25BT6ENS AV-25BT6ENB ■ ■ ■ ■ 21-pin Euro connector (SCART socket) : AV1 / AV 2 (P-P= Peak to Peak, S-W= Sync tip to white peak, B-W= Blanking to white peak) Signal Designation Matching Value AV-1 AV-2 No . ○ ○...

  • Page 8: Safety Precautions

    AV-25BT6ENS AV-25BT6ENB 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 9: Features

    AV-25BT6ENS AV-25BT6ENB 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. 11. APS (Automatic Programming System). 3.

  • Page 10: Specific Service Instructions

    AV-25BT6ENS AV-25BT6ENB SPECIFIC SERVICE INSTRUCTIONS DISASSEMBLY PROCEDURE REMOVING THE REAR COVER REMOVING THE SPEAKER " After removing the rear cover. 1. Remove the 8 screws marked A. 2. Remove the 2 screws marked B. 1. Remove the 4 screws marked D. 3.
  • Page 11 AV-25BT6ENS AV-25BT6ENB 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. 4.
  • Page 12 AV-25BT6ENS AV-25BT6ENB 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 13 AV-25BT6ENS AV-25BT6ENB 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 LANGUAGE ENGLISH MODE STEREO AV-2 OUTPUT...

  • Page 14: Service Adjustments

    AV-25BT6ENS AV-25BT6ENB SERVICE ADJUSTMENTS ADJUSTMENT PREPARATION: 1. You can make the necessary adjustments for this unit with 6. Never touch any adjustment parts whic h are not specified in the either the Remote Control Unit or With the adju stment tools list for this adjustment - variable resistors, transformers, and par ts as given below.
  • Page 15 AV-25BT6ENS AV-25BT6ENB 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 SOUND PICTURE FEATURE INSTALL PROGRAM...
  • Page 16 AV-25BT6ENS AV-25BT6ENB ■ 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 AUTOMATIC GAIN CONT ROL Automatic ally VLIN VERTICAL LINEARITY...
  • Page 17 AV-25BT6ENS AV-25BT6ENB ■ ADJUSTMENT ITEM & INITIAL (Recommended) SETTING VALUE in the SERVICE MENU ADJUSTMENT DESCRIPTION INITIAL VALUE ITEM RECEPTION STANDARD OPTIONS 00001001 VIDEO OPTIONS 01101101 TV FEATURES 10001000 CHANNEL TABLES 00000000 TELETEXT OPTIONS 10010101 GEOM GEOMET RY OPTIONS 00000000 PIP PRESET CHANGE 00000000 "...
  • Page 18 AV-25BT6ENS AV-25BT6ENB 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. 3.
  • Page 19 AV-25BT6ENS AV-25BT6ENB ■ ■ ■ ■ 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. adjustment 4.
  • Page 20 AV-25BT6ENS AV-25BT6ENB Measuring Item Test point Ad justment part Description instruments VERTICAL Signal VPOF 1. Receive a NTSC-M circ le pattern of vertical frequency 60Hz. POSITION gener ator 2. Enter SERVICE MENU. OFFSET 3. Select VPOF with the FUNCTION ( / ) key. Ad justment Remote 4.
  • Page 21 AV-25BT6ENS AV-25BT6ENB ■ ■ ■ ■ 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. 2. Enter SERVICE MENU. adjustment Remote 3.
  • Page 22 AV-25BT6ENS AV-25BT6ENB Measuring Item Test point Ad justment part Description instrument VERTICAL Signal VCCO 1. Receive a PAL B/G cross-hatch pattern signal of vertical CORNER gener ator frequency 50Hz. CORRECTION 2. Enter GEOMETRY MENU. adjustment Remote 3. Select VCCO (Vertical s-correction) with the FUNCTION (50Hz) control unit ( / ) key.
  • Page 23 AV-25BT6ENS AV-25BT6ENB Measuring Item Test point Ad justment part Description instrument HORIZONTAL Signal HPIN 1. Receive a PAL B/G cross-hatch pattern signal of vertic al PINCUSHION gener ator frequency 50Hz. adjustment 2. Enter GEOMETRY MENU. (50Hz) Remote 3. Select HPIN(Horizontal pincushion) with the FUNCTION control unit ( / ) key.
  • Page 24 AV-25BT6ENS AV-25BT6ENB ■ ■ ■ ■ 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. (Low light) Remote 4.
  • Page 25 AV-25BT6ENS AV-25BT6ENB SCHEMATIC DIAGRAMS COLOUR TELEVISION AV-25BT6ENS AV-25BT6ENB CD-ROM No.SML200207 RM-C1100 CONTENTS NOTE ON USING CIRCUIT DIAGRAMS SEMICONDUCTOR SHAPES BLOCK DIAGRAM CIRCUIT DIAGRAMS PATTERN DIAGRAMS 2-21 No.52056 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. Jul. 2002...
  • Page 26 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB FRONT CONTROL PWB PATTERN AV-25BT6ENS, AV-25BT6ENB STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS Withstand voltage 1.SAFETY No indication :DC50[V] The components identified by the symbol and shading are Others :DC withstand voltage [V] critical for safety. For continued safety replace safety critical AC indicated components only with manufactures recommended parts.
  • Page 27 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB CRT SOCKET PWB PATTERN CONTENTS SEMICONDUCTOR SHAPES BLOCK DIAGRAM CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM CRT SOCKET PWB CIRCUIT DIAGRAM 2-17 HEADPHONE PWB CIRCUIT DIAGRAM 2-19 FRONT CONTROL PWB CIRCUIT DIAGRAM 2-20 PATTERN DIAGRAMS MAIN PWB PATTERN 2-21 CRT SOCKET PWB PATTERN 2-23...
  • Page 28 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB BLOCK DIAGRAM SUB AMP SUBW TDA7261 STEREO SOUND MSP34X0D/G PLL/VST TUNER AUDIO AM P VIRTUAL DOLBY UV1315/16 TDA7269A MSP 3411G HP AMP TDA1308 MONO SE RVICE CONNECTOR VIDEO EEPROM PROCESSOR RGB AMP CONTROLLER STV2248C TDA610 8 ST92195 KEYPAD SENSOR...
  • Page 29 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM [1/6] 4.8V 1.9V 1.6V 1.8V 4.9V 4.9V MAIN PWB (1/6) VE-20101572 (AV-25BT6ENS, AV-25BT6ENB) 1.4V 1.4V 1.4V 1.6V 4.9V 4.9V 3.9V 4.9V IC501 40 3.9V 0.2V 1.8V 4.9V 4.9V IC501 41 0.9V 4.5V 1.6V...
  • Page 30 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB MAIN PWB CIRCUIT DIAGRAM [2/6] MAIN PWB (2/6) 1.1V 2.4V VE-20101572 (AV-25BT6ENS, AV-25BT6ENB) 2.4V 2.3V 4.8V 2.5V 3.9V 2.4V 2.4V -15.6V 15.3V 12.1V 2.2V 0.9V 1.9V 0.8V 5.5V -15.6V 3.8V 5.7V 7.9V 4.4V IC403 48 2.9V 12.1V 2.3V 15.1V...
  • Page 31 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB MAIN PWB CIRCUIT DIAGRAM [3/6] 4.9V 4.8V 7.9V 7.9V 7.9V 0.1V 0.1V 2.2V 3.3V MAIN PWB (3/6) VE-20101572 (AV-25BT6ENS, AV-25BT6ENB) No.52056 No.52056 2-10...
  • Page 32 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB MAIN PWB CIRCUIT DIAGRAM [4/6] MAIN PWB (4/6) VE-20101572 (AV-25BT6ENS, AV-25BT6ENB) 3.9V 3.9V 3.4V 12.6V 26.9V 12.6V 3.1V 12.6V 4.3V 3.3V 5.5V 26.3V 1.4V 1.2V IC601 2 IC601 5 IC601 6 IC601 7 5.5V 5.5V Q601 B 6.8V 1300 193V...
  • Page 33 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB MAIN PWB CIRCUIT DIAGRAM [5/6] 4.9V 12.2V 9.4V 4.9V 12.2V 7.9V 1.1V 107.5V 0.1V 281V 4.9V 12.5V 2.5V 2.5V 0.6V MAIN PWB (5/6) VE-20101572 12.2V (AV-25BT6ENS, AV-25BT6ENB) 12.5V 11.1V 4.9V 2.3V 0.1V No.52056 2-13 2-14 No.52056...
  • Page 34 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB MAIN PWB CIRCUIT DIAGRAM [6/6] 3.6V 3.7V 3.7V 3.7V 3.7V 3.7V 3.7V 3.7V 3.7V 6.8V 7.9V 6.1V 3.7V 3.7V 1.4V 1.4V 1.4V 1.4V 4.9V 3.7V 2.5V 3.7V 3.7V 3.2V 2.4V 2.4V 2.3V 1.7V 1.6V 4.9V 0.1V 0.1V 0.1V 0.1V...
  • Page 35 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB CRT SOCKET PWB CIRCUIT DIAGRAM IC900 8 IC900 9 IC900 7 3.8V CRT SOCKET PL902 2.5V 2.5V 2.5V 4.8V 132V 145V 133V 201V 195V -0.9V CRT SOCKET PWB VE-20094670 (AV-28BT8ENS, AV-28BT8ENB) (AV-28BT8EPS, AV-28BT8EPB) (AV-28BT8EES, AV-28BT8EEB) No.52056 No.52056 2-17 2-18...
  • Page 36 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB HEADPHONE PWB CIRCUIT DIAGRAM HEADPHONE PWB VE-20079493 (AV-25BT6ENS, AV-25BT6ENB) FRONT CONTROL PWB CIRCUIT DIAGRAM FRONT CONTROL PWB VE-20083646 (AV-25BT6ENS, AV-25BT6ENB) No.52056 2-19 2-20 No.52056...
  • Page 37 AV-25BT6ENS AV-25BT6ENS AV-25BT6ENB AV-25BT6ENB PATTERN DIAGRAMS MAIN PWB PATTERN FRONT No.52056 No.52056 2-21 2-22...
  • Page 38 VICTOR COMPANY OF JAPAN, LIMITED HOME AV NETWORK BUSINESS UNIT. 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan VP 0207 DP6060...
  • Page 39 AV-25BT6ENS AV-25BT6ENB PARTS LIST CONTENTS ! USING PW BOARD & REMOTE CONTROL UNIT ･･･････ ･････････････ ･･･････････････････ ･････････････ ･･ ! EXPLODED VIEW PARTS LIST ･･･････ ･････････････ ････････････ ･･･････ ･････････････ ･･･････････････････ ･･･ ! EXPLODED VIEW ･･･････ ･････････････ ････････････ ･･･････ ･････････････ ･･･････････････････ ･････････････ ････ ! PRINTED WIRING BOARD PARTS LIST [ AV-25BT6ENS / AV-25BT6ENB ] "...

  • Page 40: Exploded View Parts List

    CHASSIS FRAME VE-20092523 REAR COVER (AV-25BT6ENS) VE-20101575 REAR COVER (AV-25BT6ENB) VE-20067720 AV TARMINAL BOARD VE-20067720 SCREW (2.9X9.5) (X4) VE-35004572 SCREW (4X20) (X8) VE-20102134 RATING LABEL (AV-25BT6ENS) VE-20102164 RATING LABEL (AV-25BT6ENB) VE-40009154 LOGO JVC (AV-25BT6ENS) VE-40009152 LOGO JVC (AV-25BT6ENB) No. 52056...

  • Page 41: Exploded View

    AV-25BT6ENS AV-25BT6ENB EXPLODED VIEW TR601 MAIN PWB FRONT CO NTROL PWB HEADPHONE PWB No. 52056...

  • Page 42: Printed Wiring Board Parts List

    AV-25BT5ENS AV-25BT5ENB PRINTED WIRING BOARD PARTS LIST [ AV-25BT6ENS / AV-25BT6ENB ] MAIN P.W. BOARD ASS’Y (VE-20101572) ! Symbol No. Part No. Part Name Description ! Symbol No. Part No. Part Name Description RESISTOR RESISTOR R102 VE-30012657 SMD RES. 1/16W 1K J R450 VE-30012702 SMD RES.
  • Page 43 AV-25BT5ENS AV-25BT5ENB ! Symbol No. Part No. Part Name Description ! Symbol No. Part No. Part Name Description RESISTOR CAPACITOR R668 VE-30000790 CF RES. 1/4W 6.8R J C164 VE-30012692 SMD RES. 1/16W 4.7K J R669 VE-30012510 SMD RES. 1/16W 100R J C165 VE-30000413 EL CAP.
  • Page 44 AV-25BT5ENS AV-25BT5ENB ! Symbol No. Part No. Part Name Description ! Symbol No. Part No. Part Name Description CAPACITOR CAPACITOR C544 VE-30000345 EL CAP. 10UF 50V M C835 VE-30012590 SMD CAP. 47NF 50V K C547 VE-30000345 EL CAP. 10UF 50V M C838 VE-30000407 EL CAP.
  • Page 45 AV-25BT5ENS AV-25BT5ENB ! Symbol No. Part No. Part Name Description ! Symbol No. Part No. Part Name Description DIODE OTHERS D610 VE-30001318 DIODE ! F801 VE-30001731 FUSE 2.5A D613 VE-30001318 DIODE ! TH800 VE-30001270 9 OHM D614 VE-30001285 DIODE ! TR801 VE-30002104 LINE FILTER D616...

  • Page 46: Crt Socket Pw Board Ass'y

    AV-25BT5ENS AV-25BT5ENB CRT SOCKET P.W. BOARD ASS’Y (VE-20094670) FRONT CONTROL P.W. BOARD ASS’Y (VE-20084570) ! Symbol No. Part No. Part Name Description ! Symbol No. Part No. Part Name Description RESISTOR RESISTOR R900 VE-30000788 CF RES. 1/4W 6.8M J VE-30000689 CF RES.

  • Page 47: Packing / Packing Parts List

    AV-25BT6ENS AV-25BT6ENB PACKING PACKING PARTS LIST ! Ref.No. Part No. Part Name Description VE-50028494 CARTON BOX (AV-25BT6ENS) VE-50028507 CARTON BOX (AV-25BT6ENB) VE-20004294 CUSHION ASS’Y VE-50026637 POLY BAG (1250*1000) VE-70000587 POLY BAG VE-30017763 REMOTE CONTROL UNIT (RM-C1100) VE-50028493 INST BOOK BT-54013-2TK WARRANTY CARD VE-20102134 LABEL...
  • Page 48 AV-25BT6ENS AV-25BT6ENB Memo No. 52056...
  • Page 49 AV-25BT6ENS AV-25BT6ENB Memo No. 52056...
  • Page 50 VICT OR COMPANY OF J APAN, LIMIT ED HOME AV NETWORK BU SINESS UNIT 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama, Kanagawa-prefecture, 221-8528, Japan VP 0207 DP208051...

This manual is also suitable for:

Av-20rm4seAv-21rm4snAv-21rm4sp

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