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JVC AV-21B16 Service Manual

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SERVICE MANUAL
7
2006
YA415
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
COLOUR TELEVISION
AV-21B16
TABLE OF CONTENTS
COPYRIGHT © 2006 Victor Company of Japan, Limited
BASIC CHASSIS
CG4
No.YA415
2006/7

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  Summary of Contents for JVC AV-21B16

  • Page 1 COLOUR TELEVISION YA415 2006 AV-21B16 BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Items Contents Dimensions (W × H × D) 59.8 cm × 47.6 cm × 47.7 cm Mass 22 kg TV RF System B/G, I, D/K Colour System SECAM NTSC 3.58 / NTSC 4.43 Receiving VHF Low 46.25 MHz to 140.25 MHz Frequency VHF High 147.25 MHz to 423.25 MHz...
  • Page 3: 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 4 SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER • Unplug the power cord. (1) Remove the 6 screws [A], 1 screw [B] and 1 screw [C] 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 5 FRONT CABINET SPEAKER CRT SOCKET PWB (Within MAIN PWB) FRONT LED PWB (Within MAIN PWB) POWER CORD MAIN PWB SPEAKER REAR COVER Fig.1 1-6 (No.YA415)
  • Page 6 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 7 3.2.2 SETTINGS OF FACTORY SHIPMENT 3.2.3 SYSTEM CONSTANT SETTING 3.2.2.1 BUTTON OPERATION Setting item Setting value Setting item Setting position COLOUR TRIPLE POWER BILINGUAL CHANNEL TUNER VOLUME ECO SENSOR LANGUAGE E / C / M / I 3.2.2.2 REMOTE CONTROL DIRECT OPERATION B/B SOUND Setting item Setting position...
  • Page 8 3.2.4 SERVICE MENU SETTING ITEMS Setting item Setting value Setting item Setting value 2. V/C 1.CUT OFF 5. PRESET Colour System 1. C-TRAP FIX 2.DRIVE [Do not adjust] 2. SHARP PEAK 3.BRIGHT 3. ABL 4.CONT. 4. GAMMA 5.COLOUR 5. Y. DELAY TIME 6.TINT 6.
  • Page 9 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 10 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 11: 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.YA415)
  • Page 12 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 13 (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 14 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 15 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 16 [5. PRESET] The items in the following table, it is no requirement for adjustment.If values had changed by the miss operation, set the initial setting values in the following table. COLOUR SYSTEM (Do not adjust) Initial setting value (Fixed value) Setting item Variable range SECAM...
  • Page 17 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 18 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 19 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 20 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 21 MODEL SECAM NTSC3.58 NTSC4.43 (3) Adjust NTSC 3.58 COLOUR to bring the value of (A) in the voltage table. AV-21B16 +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 22 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-21B16 +6V (VDO) SECAM BLACK Signal [2. V/C] (1) Input a SECAM full field colour bar signal.
  • Page 23 4.8.6 VSM PRESET SETTING Measuring Item Test point Adjustment part Description instrument VSM PRESET Remote [4. VSM PRESET] (1) Select 4. VSM PRESET from the SERVICE MENU. control unit TINT (2) Set the PICTURE MODE to BRIGHT. COLOUR (3) Select < TINT >. BRIGHT (4) Set the initial setting value of <...
  • Page 24 4.8.7 PURITY AND CONVERGENCE PURITY ADJUSTMENT Note: The final adjustment of CONVERGENCE must be done after WEDGE DEFLECTION the FOCUS adjustment. (CONVERGENCE is changed by YOKE FOCUS adjustment.) When makes difference by FOCUS adjustment, should be reconfirming PURITY adjustment. (1) Demagnetize CRT with the demagnetizer. P / C (2) Loosen the retainer screw of the deflection yoke.
  • Page 25: Troubleshooting

    STATIC CONVERGENCE ADJUSTMENT (1) Input a crosshatch signal. (2) Using 4-pole convergence magnets, overlap the red and (FRONT VIEW) blue lines in the centre of the screen (Fig.1) and turn them to magenta (red/blue). (3) Using 6-pole convergence magnets, overlap the magenta (red/blue) and green lines in the centre of the screen and turn them to white.
  • Page 26: Block Diagram

    BLOCK DIAGRAM MAIN PWB(1/3, 2/3) 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 MAIN PWB(3/3) MEMORY...
  • Page 27: Circuit Diagrams

    CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/3) SHEET1 D704 R772 S705 POWER LED(GREEN) IC704 ON TIMER LED(RED) SPEAKER S702 S704 S701 S703 Q708 R727 R731 R730 R771 R726 4.7k 4.7k Q710 CN0S5 C721 R736 C738 .033 CN10A R737 R796 Y658 R728 100k J005...
  • Page 28 MAIN PWB CIRCUIT DIAGRAM (2/3)(3/3) SHEET 2 MAIN PWB(1/3) SHEET 1 AC110V-AC240V 50Hz/60Hz CN0PW SK351 R365 VA901 TP-47B Y973 Y972 L353 Q353 R362 S901 Y961 Q961 F901 R353 C901 T3.15AL C356 390p R359 IC421 R368 R356 1.8k R961 R962 R348 LF901 R963 R965...
  • Page 29 PATTERN DIAGRAMS MAIN PWB PATTERN R573 Y001 C925 D921 Y002 R574 R983 C993 D925 J002 W543 R575 C842 C008 R9 35 C571 R802 R982 Q804 CN0S2 C926 W012 W023 R807 R004 R815 C924 C942 R003 C981 W436 R811 C010 FRONT R929 R002 C011...
  • Page 30 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 Q651 Q351 125.8 Q652 Q352 123.3 Q653...
  • Page 31 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 2.5 Vp-p 5.0 Vp-p 5.0 Vp-p (SHEET2) IC421-1 IC421-3 IC421-5 IC421-6 Q521-C Q521-B...
  • Page 32: Table Of Contents

    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-1546A-H2) ....................3-5 REMOTE CONTROL UNIT PARTS LIST (RM-C360GY-1H) ..................3-8 PACKING ..................................
  • Page 33: Using P.w. Board & Remote Control Unit

    USING P.W. BOARD & REMOTE CONTROL UNIT P.W.B ASS'Y AV-21B16 MAIN P.W.B SCG-1546A-H2 REMOTE CONTROL UNIT RM-C360GY-1H EXPLODED VIEW PARTS LIST -1  Ref.No. Part No. Part Name Description Local  V01 A51MBA11X05AN05 PICTURE TUBE(ITC) Inc.DEF YOKE, PC MAGNET  L01...
  • Page 34: Exploded View -1

    EXPLODED VIEW -1 CRT SOCKET PWB (Within MAIN PWB) FRONT LED PWB T522 (Within MAIN PWB) MAIN PWB RATING LABEL 3-4(No.YA415)
  • Page 35: Printed Wiring Board Parts List

    PRINTED WIRING BOARD PARTS LIST MAIN P.W. BOARD ASS'Y (SCG-1546A-H2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C005 QFVF1HJ-104Z MF CAPACITOR 0.1uF 50V J C008 QETN1HM-475Z E CAPACITOR 4.7uF 50V M IC301 NN5198K C103...
  • Page 36 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C657 QETN1EM-107Z E CAPACITOR 100uF 25V M R322 NRSA63J-272X MG RESISTOR 2.7kΩ 1/16W J C658 QETN1EM-227Z E CAPACITOR 220uF 25V M R323 NRSA63J-103X MG RESISTOR 10kΩ...
  • Page 37 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R711 NRSA63J-472X MG RESISTOR 4.7kΩ 1/16W J K943 QQR1113-001Z FERRITE BEADS R712 NRSA63J-472X MG RESISTOR 4.7kΩ 1/16W J QQR0527-002 LINE FILTER LF901 R713 NRSA63J-472X MG RESISTOR 4.7kΩ...
  • Page 38: 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 GG10285-012A-H PACKING CASE GG10422-001A-H CUSHION ASS'Y 5pcs in 1set GG30097-003A-H POLY BAG GG30096-001A-H POLY BAG...