1. Manuals
  2. Brands
  3. JVC Manuals
  4. TV
  5. AV-2108WE/BSK
  6. Service manual

JVC AV-2108WE/BSK Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
SERVICE MANUAL
7
2006
YA386
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
COLOUR TELEVISION
AV-2108WE

TABLE OF CONTENTS

COPYRIGHT © 2006 Victor Company of Japan, Limited
/BSK
BASIC CHASSIS
CG4
No.YA386
2006/7

Advertisement

Table of Contents
loading

Related Manuals for JVC AV-2108WE/BSK

Summary of Contents for JVC AV-2108WE/BSK

  • Page 1: Table Of Contents

    SERVICE MANUAL COLOUR TELEVISION YA386 2006 AV-2108WE /BSK BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Items Contents Dimensions (W × H × D) 64.9 cm × 46.6 cm × 47.2 cm Mass 22 kg TV RF System B/G, I, D/K Colour System SECAM NTSC 3.58 / NTSC 4.43 (NTSC:EXT only). Receiving VHF Low 46.25 MHz to 140.25 MHz Frequency VHF High 147.25 MHz to 423.25 MHz...

  • 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 FEATURES PICTURE MODE CHILD LOCK This function can adjust the picture settings automatically. Use this function to prevent children from operating the TV There are BRIGHT, STANDARD and SOFT in the PICTURE without parental consent. MODE.

  • Page 5: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER • Unplug the power cord. (1) Remove the 9 screws [A], and 1 screw [B] as shown in Fig.1. (2) Withdraw the REAR COVER toward you. CAUTION: When reinstalling the rear cover, carefully push it inward after inserting the MAIN PWB into the REAR COVER groove.
  • Page 6 FRONT CABINET SPEAKER CRT SOCKET PWB MAIN PWB SPEAKER POWER CORD REAR COVER Fig.1 1-6 (No.YA386)
  • Page 7 MEMORY IC REPLACEMENT • This model uses the memory IC. • This memory IC stores data for proper operation of the video and drive circuits. • When replacing, be sure to use an IC containing this (initial value) data. 3.2.1 MEMORY IC REPLACEMENT PROCEDURE 1.
  • Page 8 Setting position Setting item BRIGHT STANDARD SOFT TINT COLOUR BRIGHT CONT. SHARP 3.2.3 SYSTEM CONSTANT SETTING Setting value Setting item AV-2108WE/BSK COLOUR TRIPLE BILINGUAL TUNER ECO SENSOR LANGUAGE E / R / U B/B SOUND LOCK COLOUR AUTO MINT TEXT RATE...
  • Page 9 (3) While pressing [MENU] button and [VOL+] button ON the FRONT CABINET simultaneously, turn the POWER ON. When the POWER is turned ON, the data is written in the micro-computer immediately. LOCATIONS OF FRONT PANEL BUTTONS [AV-2108WE/BSK] MENU VOLUME + POWER (No.YA386)1-9...
  • Page 10 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 11: 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 12: Main Pwb

    ADJUSTMENT LOCATIONS CRT SOCKET PWB (SOLDER SIDE) TP-47G/R TP-47B TP-E CRT EARTH WIRE (BRAIDED ASS'Y) FRONT F901 IC702 IC701 MEMORY IC IC301 TU001 MAIN PWB 1Pin TP-91(B1) UPPER:FOCUS 2Pin NC LOWER:SCREEN 3Pin X-ray1 4Pin X-ray2 5Pin TP-E( ) 1-12 (No.YA386)
  • Page 13 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 Adjustment of the IF circuits.
  • Page 14 (1) By pressing the [6] key, you can change the ON or OFF [should be OFF]. Should be OFF: If it is ON, when you turn off the power and turn on a power again, the JVC’s logo will be shown about 15 seconds automatically, and the SETUP TOUR starts.
  • Page 15 4.6.8 SERVICE MENU FLOW CHART SERVICE MENU 1. IF VCO (CW) ***.** TOO HIGH SERVICE MENU ABOVE REFERENCE 1.IF 2.V/C JUST REFERENCE 3.DEF 4.VSM PRESET BELOW REFERENCE 1. VCO 5.PRESET TOO LOW 6.SETUP TOUR OFF AFT ADJUST 2. DELAY POINT VCO ADJUST 1-6 : SELECT DISP : EXIT...
  • Page 16 INITIAL SETTING VALUE OF SERVICE MENU • Adjustment of the SERVICE MENU is made on the basis of the initial setting values ; however, the new setting values which set the screen in its optimum condition may differ from the initial setting. •...
  • Page 17 [5. PRESET] The values in the tollowing table are not reguired for adjustment. If these values are mistakenly adjusted, reset them by referring to the table below. COLOUR SYSTEM (Do not adjust) Initial setting value (Fixed value) Setting item Variable range SECAM NTSC 3.58 NTSC 4.43...
  • Page 18 ADJUSTMENT PROCEDURE 4.8.1 CHECK ITEM Measuring Item Test point Adjustment part Description instrument B1 VOLTAGE Signal TP-B1 : 1-pin (1) Receive a whole black signal. generator TP-E : 5-pin (2) Connect a DC voltmeter to 1-pin and 5-pin of S1 (S1 connector) connector.
  • Page 19 Measuring Item Test point Adjustment part Description instrument DELAY POINT Signal [1. IF] (1) Receive a black and white signal (colour off). (AGC) generator 2. DELAY POINT (2) Select 1. IF. (AGC TAKE-OVER) (3) Select < 2. DELAY POINT >. Remote (4) Set the setting values of the setting items as shown control unit...
  • Page 20 4.8.4 DEFLECTION CIRCUIT • There are 2 modes of adjustment (setting value) 50Hz mode and 60Hz mode, depending upon the kind of signals (vertical frequency 50Hz / 60Hz). • When adjusted in 50Hz mode and 60Hz mode will be automatically set. The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values.The setting values which adjust the screen to the optimum condition can be different from the initial setting values.
  • Page 21 4.8.5 VIDEO CIRCUIT The setting (adjustment) using the REMOTE CONTROL UNIT is made on the basis of the initial setting values. The setting values which adjust the screen to the optimum condition can be different from the initial setting values. Do not change the initial setting values of the setting items not listed in "ADJUSTMENT PROCEDURE".
  • Page 22 MODEL SECAM NTSC3.58 NTSC4.43 (3) Adjust NTSC 3.58 COLOUR to bring the value of (A) in the voltage table. AV-2108WE/BSK +12V +8V(VDO) NTSC 4.43 COLOUR (1) When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values.
  • Page 23 NTSC 4.43 TINT (1) When NTSC 3.58 is set, NTSC 4.43 will be automatically set at the respective values. Voltage setting (B) MODEL NTSC3.58 NTSC4.43 AV-2108WE/BSK +6V(VDO) SECAM BLACK Signal [2. V/C] (1) Input a SECAM full field colour bar signal. OFFSET generator 7.

  • Page 24: Troubleshooting

    Make similar adjustment as same step as above. BRIGHT TINT COLOUR BRIGHT CONT. SHARP : SELECT - / + : OPREATE DISP : EXIT [4.VSM PRESET] [AV-2108WE/BSK] Initial setting value Setting Variable item range BRIGHT STANDARD SOFT TINT 0 - 30...
  • Page 25 Victor Company of Japan, Limited Display Category 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA386) Printed in Japan...
  • Page 26 SCHEMATIC DIAGRAMS COLOUR TELEVISION AV-2108WE /BSK CD-ROM No.SML200607 BASIC CHASSIS No.YA386 COPYRIGHT © 2006 Victor Company of Japan, Limited. 2006/7...

  • Page 27: Standard Circuit Diagram

    AV-2108WE /BSK STANDARD CIRCUIT DIAGRAM NOTE ON USING CIRCUIT DIAGRAMS 1.SAFETY Type No indication : Ceramic capacitor The components identified by the symbol and shading are : Metalized mylar capacitor critical for safety. For continued safety replace safety ciritical : Polypropylene capacitor components only with manufactures recommended parts.

  • Page 28: Circuit Diagrams

    MAIN PWB CIRCUIT DIAGRAM(2/2), CRT SOCKET PWB CIRCUIT DIAGRAM ........2-7 PATTERN DIAGRAMS .................2-9 MAIN PWB PATTERN ..........................2-9 VOLTAGE CHARTS ................... 2-11 WAVEFORMS .................... 2-12 USING P.W. BOARD PWB ASS'Y name AV-2108WE/BSK MAIN P.W. BOARD SCG-1525A-H2 CRT SOCKET P.W. BOARD SCG-3009A-H2 SEMICONDUCTOR SHAPES TRANSISTOR...

  • Page 29: Block Diagram

    BLOCK DIAGRAM MAIN PWB POWER LED STB_PW IC703 5V REG.& RESET TIMER LED SF102 TU001 Q102 LED(TIM) IF AMP SAW FILTER TUNER REMOCON REMOCON RECEIVER SCL/SDA HEADPHONE IC651 SPEAKER L AUDIO AMP AUDIO OUT SCL/SDA SCL/SDA SPEAKER R IC701 IC702 CRT SOCKET PWB MEMORY RGB/YS...
  • Page 30 CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/2) SHEET1 SPEAKER D704 R773 R772 IC704 GP1UE281QKVF S702 S704 S705 S701 S703 R721 R727 R731 R730 R726 C719 4.7k C727 4.7k 1/50 R703 .1/16 D701 C721 R749 Q708 R736 .033 4.7k Q709 Q710 CN0S3 CN0S4 CN0S5...
  • Page 31 MAIN PWB CIRCUIT DIAGRAM, CRT SOCKET PWB CIRCUIT DIAGRAM (2/2) SHEET 2 MAIN PWB(1/2) SHEET 1 AC110V-AC120V 50H/z/60Hz CN0PW TP-47B SK351 R365 QNZ0536-002 VA901 R362 2WOM Y973 Y972 1.5k 1/2W A51MBA11X05AN40 Q353 2SC4212/Z1/ S901 B-OUT QRZ0111-152 Y961 Q961 F901 BW10 R353 C356 C901...
  • Page 32 MAIN PWB, CRT SOCKET PWB PATTERN R573 Y001 C925 D921 Y002 R574 R983 C993 D925 J002 R575 W543 C842 C008 R9 35 C571 R802 R982 Q804 CN0S2 W012 C926 W023 R807 R004 R815 C924 C942 R003 C981 W436 R811 C010 FRONT R929 R002...
  • Page 33 VOLTAGE CHARTS <MAIN PWB> <CRT SOCKET PWB> MODE MODE MODE MODE DC ( V ) DC ( V ) DC ( V ) DC ( V ) PIN NO. PIN NO. PIN NO. PIN NO. IC301 Q653 Q351 15.1 125.8 15.2 Q702 Q352...
  • Page 34 WAVEFORMS -MAIN PWB- (SHEET1) IC301-10 IC301-11 IC301-12 IC301-14 IC301-36 IC301-40 IC301-42 (1µs) (1µs) 3.5 Vp-p 3.5 Vp-p 4.0 Vp-p 0.35 Vp-p 3.0 Vp-p 0.5 Vp-p 2.5 Vp-p IC301-46 IC701-27 IC701-35 5.0 Vp-p 5.0 Vp-p 2.5 Vp-p (SHEET2) IC421-1 IC421-3 IC421-5 IC421-6 Q521-C Q521-B...
  • Page 35 Victor Company of Japan, Limited Display Category 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama-city, kanagawa-prefecture, 221-8528, Japan (No.YA386) Printed in Japan...

  • Page 36: Parts List

    PARTS LIST CAUTION The parts identified by the symbol are important for the safety . Whenever replacing these parts, be sure to use specified ones to secure the  safety. The parts not indicated in this Parts List and those which are filled with lines --- in the Parts No. columns will not be supplied. P.W.
  • Page 37 CONTENTS USING P.W. BOARD & REMOTE CONTROL UNIT ....................3-3 EXPLODED VIEW PARTS LIST -1 ..........................3-3 EXPLODED VIEW -1 ..............................3-4 PRINTED WIRING BOARD PARTS LIST ........................3-5 MAIN P.W. BOARD ASS'Y (SCG-1525A-H2) ....................3-5 CRT SOCKET P.W. BOARD ASS'Y (SCG-3009A-H2) ..................3-7 REMOTE CONTROL UNIT PARTS LIST (RM-C360GY-1H) ..................

  • Page 38: Using P.w. Board & Remote Control Unit

    USING P.W. BOARD & REMOTE CONTROL UNIT P.W.B ASS'Y AV-2108WE/BSK MAIN P.W.B SCG-1525A-H2 CRT SOCKET P.W.B SCG-3009A-H2 REMOTE CONTROL UNIT RM-C360GY-1H EXPLODED VIEW PARTS LIST -1  Ref.No. Part No. Part Name Description Local  V01 A51MBA11X05AN40 PICTURE TUBE(ITC) Inc.DEF YOKE, PC MAGNET ...

  • Page 39: Exploded View -1

    EXPLODED VIEW -1 CRT SOCKET PWB T522 MAIN PWB RATING LABEL 3-4(No.YA386)

  • Page 40: Printed Wiring Board Parts List

    PRINTED WIRING BOARD PARTS LIST MAIN P.W. BOARD ASS'Y (SCG-1525A-H2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C008 QETN1HM-475Z E CAPACITOR 4.7uF 50V M C103 QETN1EM-476Z E CAPACITOR 47uF 25V M IC301 NN5198K C104...
  • Page 41 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C705 QETN1CM-477Z E CAPACITOR 470uF 16V M R374 NRSA63J-682X MG RESISTOR 6.8kΩ 1/16W J C706 NCB31HK-104X C CAPACITOR 0.1uF 50V K R401 NRSA02J-103X MG RESISTOR 10kΩ...

  • Page 42: Crt Socket P.w. Board Ass'y (Scg-3009A-H2)

    CRT SOCKET P.W. BOARD ASS'Y (SCG-3009A-H2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R748 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R749 NRSA63J-472X MG RESISTOR 4.7kΩ 1/16W J Q351 2SC4212/Z1/ TRANSISTOR R771 NRSA63J-0R0X MG RESISTOR 0Ω...

  • Page 43: Remote Control Unit Parts List (Rm-C360Gy-1H)

    REMOTE CONTROL UNIT PARTS LIST (RM-C360GY-1H)  Ref No. Part No. Part Name Description Local R25-8567 BATTERY COVER PACKING PACKING PARTS LIST  Ref.No. Part No. Part Name Description Local GG10323-018A PACKING CASE GG10188-006A CUSHION ASS'Y 4pcs in 1set GG30097-003A-H POLY BAG GG30096-001A-H POLY BAG...

Table of Contents