JVC AV-21MS30 Service Manual
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JVC AV-21MS30 Service Manual

JVC AV-21MS30 Service Manual

Jvc flat colour television service manual
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SERVICE MANUAL
FLAT COLOUR TELEVISION
8
YA328
2005
EXIT
RM-C1286
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
AV-21MS30
TABLE OF CONTENTS
COPYRIGHT © 2005 Victor Company of Japan, Limited
/N
BASIC CHASSIS
CW2
No.YA328
2005/8

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  • Page 1 SERVICE MANUAL FLAT COLOUR TELEVISION YA328 2005 AV-21MS30 BASIC CHASSIS EXIT RM-C1286 TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Items Contents Dimensions (W 64.9cm 46.53cm 46.92cm Mass 23.5kg TV RF System B, G, I, D, K, M Colour System TV Mode PAL / SECAM / NTSC3.58 / NTSC4.43 Video Mode PAL / SECAM / NTSC3.58 / NTSC4.43 Stereo System A2 (B/G) / NICAM (B/G, I, D/K) Teletext system FLOF (Fastext)
  • Page 3 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES • New chassis design enables use of an interactive on-screen control. • Pure flat CRT produces fine textured picture in every detail. • Wide range voltage (110V ~ 240V) for AC power input. • With AUDIO/VIDEO/S-VIDEO/COMPONENT input terminals. •...
  • Page 4 MAIN CPU [MAIN PWB : IC701] PIN FUNCTION Pin name Function Pin name Function HP-R O Not used VssP2 CVBSO/PIP O CVBS / PIP output VssC4 O Not used V1.8C4 1.8V (Digital) FbiSo Flyback input/sandcastle output V3.3A3 3.3V Hout O Horizontal output VrefP_Sdac 3.3V (Positive) VssComb...
  • Page 5 SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER • Unplug the power cord. (1) Remove the 2 screws [A] , 7 screws [B] and 4 screws [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 6 FRONT CABINET PICTURE TUBE (x2) SPEAKER MAIN PWB (CRT SOCKET PWB) MAIN PWB (FRONT LED PWB) (x2) SPEAKER MAIN PWB (x7) (x2) REAR COVER (x4) Fig.1 (No.YA328)1-7...
  • Page 7 REPLACEMENT OF MEMORY IC 3.2.1 MEMORY IC This TV uses the following memory IC. Memory IC: IC702 on MAIN PWB SERVICE MENU The memory IC memorizes data for correctly operating the video and deflection circuits. When replacing the memory IC, be sure SERVICE MENU to use the same type IC written with the initial values of data.
  • Page 8 3.2.3 FACTORY SETTING VALUE SETTING OF SYSTEM CONSTANT SET Setting item Setting content Setting value MULTI TRIPLE THAI SYSTEM MULTI COMB TILT SUPER BASS SINGLE TEXT E/R/C/M/I LANGUAGE E/R/C/M/I STEREO MONO SOUND STEREO BILINGUAL BLUE BACK MUTE COLOUR AUTO ECO SENSOR SURROUND PICTURE BOOSTER COMPONENT...
  • Page 9 SETTING OF BASIC FUNCTIONS SERVICE MENU SETTING ITEMS Setting item Setting value Setting item Setting value POWER 1. IF 1. VCO 2. DELAY POINT SUB POWER 2. V/C 1. SCREEN VOLUME 2. CUTOFF(B/G) INPUT 3. WDR(R/G/B) COLOR SYSTEM 4. BRIGHT(TV/VDO 1/2/3) PICTURE MODE (VSM) BRIGHT 5.
  • 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 SECTION 4 ADJUSTMENT ADJUSTMENT PREPARATION (1) You can make the necessary adjustments for this unit with either the remote control unit or with the adjustment equipment and parts as given below. (2) Adjustment with the remote control unit is made on the basis of the initial setting values, however, the new setting values used for setting the screen to its optimum condition may differ from the initial settings.
  • Page 12 ADJUSTMENT LOCATIONS MAIN PWB ASS'Y (FRONT LED) CN10A MAIN PWB ASS'Y S804 S802 J808 J807 J806 J809 S805 S803 S801 FRONT POWER SW CN00A S901 CN00S POWER CORD IC702 DEG COIL IC701 YOKE J801 J802 J803 J804 CN00C CN00C CN00X TU001 UPPER : FOCUS 1.
  • Page 13 BASIC OPERATION IN SERVICE MENU Operate the SERVICE MENU with the remote control unit. 4.6.1 SERVICE MENU ITEMS With the SERVICE MENU, various settings (adjustments) can be made, and they are broadly classified in the following items of settings: 1. IF For entering/adjusting the setting values (adjustment values) of the IF circuit.
  • Page 14 4.6.3 SERVICE MENU FLOW CHART 1. IF SERVICE MENU SERVICE MENU IF SERVICE MENU 1. IF 2. V/C VCO (CW) ***** 3. AUDIO 4. DEF TOO HIGH 5. VSM W/B 6. STATUS 1. VCO ABOVE REFERENCE 7. PLUG & PLAY (ON) JUST REFERENCE 2.
  • Page 15 ADJUSTMENT PROCEDURE 4.7.1 B1 VOLTAGE Measuring Item Test point Adjustment part Description instrument B1 VOLTAGE Signal B1 (pin 1) (1) Receive a PAL black and white signal. check generator GND (pin 5) (2) Connect a DC voltmeter between B1 and GND [CN00X (between pins 1 and 5 of the connector CN00X).
  • Page 16 4.7.4 VIDEO CIRCUIT ADJUSTMENTS • 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 17 Measuring Item Test point Adjustment part Description instrument WHITE Signal [2. V/C] Note: • Set PICTURE MODE (VSM) to "BRIGHT". BALANCE generator 2. CUTOFF (B) (Low light) 2. CUTOFF (G) - COMPOSITE WHITE BALANCE - adjustment Remote (1) Receive a PAL black and white signal (colour off). control unit SCREEN VR (2) Select 2.
  • Page 18 Measuring Item Test point Adjustment part Description instrument SUB BRIGHT Remote [2. V/C] Notes: adjustment control unit 4. BRIGHT • Proceed to the following adjustment after having completed the WHITE BALANCE (Low light) and WHITE BALANCE (High light) adjustment. • Set PICTURE MODE (VSM) to "BRIGHT". (1) Receive a PAL broadcast.
  • Page 19 Measuring Item Test point Adjustment part Description instrument SUB COLOUR 2 Signal TP-47B [2. V/C] [Method of adjustment using measuring instrument] Notes: adjustment generator TP-E 6. COLOUR • Proceed to the following adjustment after having [CRT SOCKET completed the SUB CONTRAST adjustment. Oscilloscope PWB] •...
  • Page 20 Measuring Item Test point Adjustment part Description instrument SUB TINT 2 Signal TP-47B [2. V/C] [Method of adjustment using measuring instrument] adjustment generator TP-E 7. TINT Notes: [CRT SOCKET • Proceed to the following adjustment after having Oscilloscope PWB] completed the SUB CONTRAST adjustment. •...
  • Page 21 4.7.6 DEFLECTION CIRCUIT ADJUSTMENTS • 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 22 Measuring Item Test point Adjustment part Description instrument V. POSITION Signal [4. DEF] - PAL V. POSITION - adjustment generator 1. V-SHIFT (1) Receive a PAL circle pattern signal of vertical frequency 50Hz. Remote (2) Select 1. V-SHIFT. control unit (3) Set the initial setting value of 1.
  • Page 23 Measuring Item Test point Adjustment part Description instrument V.LINEARITY Signal [4. DEF] - PAL V. LINEARITY - adjustment generator 12. V-S. CR (1) Receive a PAL crosshatch signal. 13. V-LIN (2) Select 12. V-S.CR. Remote (3) Set the initial setting value of 12. V-S. CR. control unit (4) Select 13.
  • Page 24 COMPRESS : ON (16:9) Measuring Item Test point Adjustment part Description instrument V. HEIGHT Signal [4.DEF] - PAL V. HEIGHT - adjustment generator 14. V. ZOOM (1) Receive a PAL crosshatch signal of vertical 3. V-SIZE frequency 50Hz. Remote (2) Press the [MENU] key and select PICTURE. control unit (3) Select PICTURE FEATURES.
  • Page 25 VIDEO - 2 SET: COMPONENT Measuring Item Test point Adjustment part Description instrument H. POSITION Signal [4. DEF] (1) Receive a PAL circle pattern signal to VIDEO-2 adjustment generator 4. H-CENT component terminal. (2) Select VIDEO-2 SET from the MENU and set Remote VIDEO-2 SET to COMPONENT.
  • Page 26 4.7.8 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 27 STATIC CONVERGENCE ADJUSTMENT (1) Input a crosshatch signal. (2) Using 4-pole convergence magnets, overlap the red and blue lines in the centre of the screen (Fig.1) and turn them (FRONT VIEW) 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 28: Troubleshooting

    SECTION 5 TROUBLESHOOTING SELF CHECK FUNCTIONS 5.1.1 OUTLINE This model has self check functions given below. When an abnormality has been detected, the SUB POWER is turned off and POWER LED flashes to inform of the failure. An abnormality is detected by the signal input state of the control line connected to the microcomputer.
  • Page 29 SCHEMATIC DIAGRAMS FLAT COLOUR TELEVISION AV-21MS30 CD-ROM No.SML200508 BASIC CHASSIS EXIT RM-C1286 No.YA328 COPYRIGHT © 2005 Victor Company of Japan, Limited 2005/8...
  • Page 30 BLOCK DIAGRAM MAIN PWB IC701 MAIN MICRO COMPUTER/ IF VIDEO RGB SYNC DEF. PROCESS IC351 108,109 SCL1, SDA1 RGB OUT I 2 C IC702 127,128 SCL0, SDA0 MICRO MAIN MEMORY DIGITAL SIGNAL PROCESS COMPUTER TU001 98,99 TUNER REMOTE PORT KEY_IN CRT SOCKET PEAKING SCAN ROUT...
  • Page 31 MAIN PWB ASS'Y(4/4) CIRCUIT DIAGRAMS (CRT SOCKET) CN10T MAIN PWB CIRCUIT DIAGRAM (1/4), (2/4) MAIN PWB ASS'Y (2/4) (FRONT LED) SCW-1701A-H2 VIDEO-3 CN00C CN00T QGA2501F1-06 QJL001-065631 INPUT IC801 POWER LED R322 RPM7238-H5 IC302 D303 REMOTECON (RED) S9648 RECEIVER D808 J806 R323 LH22440-T16 QNN0281-003...
  • Page 32 MAIN PWB CIRCUIT DIAGRAM (3/4), (4/4) IC351 TDA6107AJF/N1 PROTECT P_ON/OFF RY901 QSK0061-002 F901 QMF51E2-4R0-S R597 D956 C966 100/16 VDRB- VA901 R910 R963 VDRB- R358 CN0PW QAF0060-621 C910 VDRA+ SK351 D595 QFZ9072-224 Q955 QRZ0107-152Z QNZ0536-001 VDRA+ S901 NECK R596 QSW0750-001 R964 NECK R359 AC110V-AC240V...
  • Page 33 PATTERN DIAGRAMS ( ) ) MAIN PWB PATTERN Q308 S805 R822 J806 J808 D808 R357 J807 IC801 L357 R824 D356 C807 IC302 D807 J809 R326 D355 R329 CN10A S801 S802 S803 R325 S804 CN00A L356 R961 SG351 CN0E1 D303 R628 R323 R318 R321...
  • Page 34 VOLTAGE CHARTS <MAIN PWB <MAIN PWB (FRONT LED)> (CRT SOCKET)> <MAIN PWB> MODE MODE MODE MODE MODE MODE DC ( V ) DC ( V ) DC ( V ) DC ( V ) DC ( V ) DC ( V ) PIN NO.
  • Page 35 WAVEFORMS -MAIN PWB- IC401-1 IC401-3 IC401-5 IC401-6 IC401-7 28Vp-p 48Vp-p 29Vp-p 0.7Vp-p 0.6Vp-p IC701-10 IC701-11 IC701-22 IC701-23 IC701-48 IC701-66 IC701-67 [0.2us/div] [0.2us/div] 2.6Vp-p 3.3Vp-p 1.0Vp-p 1.1Vp-p 1.9Vp-p 5.4Vp-p 3.3Vp-p IC701-74 IC701-85 IC701-86 IC701-87 1.4Vp-p 2.0Vp-p 1.4Vp-p 1.7Vp-p T522-2 T522-4 T522-6 T522-7 T522-8 T522-9...

  • 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: Table Of Contents

    CONTENTS USING P.W. BOARD & REMOTE CONTROL UNIT ....................3-3 EXPLODED VIEW PARTS LIST -1 ..........................3-3 EXPLODED VIEW -1 ..............................3-3 EXPLODED VIEW PARTS LIST -2 ..........................3-4 EXPLODED VIEW -2 ..............................3-5 PRINTED WIRING BOARD PARTS LIST ........................3-6 MAIN P.W.

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

    USING P.W. BOARD & REMOTE CONTROL UNIT P.W.B ASS'Y AV-21MS30/N MAIN P.W.B SCW-1772A-H2 REMOTE CONTROL UNIT RM-C1286-1H EXPLODED VIEW PARTS LIST -1  Ref.No. Part No. Part Name Description Local GG10341-001B-H SP PANEL (x2) GG10340-001B-H FRONT FRAME TOP GG10340-002B-H FRONT FRAME BOT...

  • Page 39: Exploded View Parts List -2

    EXPLODED VIEW PARTS LIST -2  Ref.No. Part No. Part Name Description Local  V01 A51QDX993X PICTURE TUBE  DY01 QQD0109-001 DEF YOKE  L01 QQW0146-001 DEG COIL  T522 QQH0188-001 FB TRANSF QYSBSBG4016Z TAP SCREW M4 x 16mm(x2) QYSBSFG4016ZA TAP SCREW M4 x 16mm(x7) QYSBSF3010ZA...

  • Page 40: Exploded View -2

    EXPLODED VIEW -2 FRONT CABINET DY01 MAIN PWB (CRT SOCKET PWB) T522 MAIN PWB (FRONT LED PWB) MAIN PWB (No.YA328)3-5...

  • Page 41: Printed Wiring Board Parts List

    PRINTED WIRING BOARD PARTS LIST MAIN P.W. BOARD ASS'Y (SCW-1772A-H2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D707 MA111-X SI DIODE D708 MA111-X SI DIODE IC302 S9648 PHOTO CONDUCTOR D709 MA111-X SI DIODE IC351 TDA6107AJF/N1...
  • Page 42 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C532 QETN2EM-106Z E CAPACITOR 10uF 250V M C764 NCB31CK-104X C CAPACITOR 0.1uF 16V K C551 QCB32HK-561Z C CAPACITOR 560pF 500V K C765 QETN1CM-107Z E CAPACITOR 100uF 16V M C552 QCB32HK-561Z...
  • Page 43 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R316 NRSA63J-0R0X MG RESISTOR 0 1/16W J R707 NRSA63J-223X MG RESISTOR 22k 1/16W J R317 NRSA63J-0R0X MG RESISTOR 0 1/16W J R708 NRSA63J-103X MG RESISTOR 10k 1/16W J R324 NRSA63J-0R0X...
  • Page 44 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R821 NRSA63J-471X MG RESISTOR 470 1/16W J K953 QQR1113-001Z FERRITE BEADS R822 NRSA63J-102X MG RESISTOR 1k 1/16W J K955 QQR1113-001Z FERRITE BEADS R823 QRE121J-470Y C RESISTOR 47 1/2W J LC801...

  • Page 45: Premote Control Unit Parts List (Rm-C1286-1H)

    PREMOTE CONTROL UNIT PARTS LIST (RM-C1286-1H)  Ref No. Part No. Part Name Description Local R25-8566 BATTERY COVER PACKING PACKING PARTS LIST  Ref.No. Part No. Part Name Description Local GG10285-002A-H PACKING CASE GG10342-001B-H CUSHION ASS'Y 4pcs in 1set GG30097-003A-H POLY BAG GG30096-001A-H POLY BAG...

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Av-21ms30/n

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