JVC AV-27530/SC Service Manual
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JVC AV-27530/SC Service Manual

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SERVICE MANUAL
11
2005
YA050B
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
COLOR TELEVISION
AV-27530

TABLE OF CONTENTS

COPYRIGHT © 2005 Victor Company of Japan, Limited
/SC
BASIC CHASSIS
FE5
No.YA050B
2005/11

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  • Page 1: Table Of Contents

    SERVICE MANUAL COLOR TELEVISION YA050B 2005 AV-27530 BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Items Contents Dimensions (W × H × D) 65.4 cm × 59.3 cm × 49.4 cm (25-3/4" × 23-3/8" × 19-1/2") Mass 31.1 kg (68.5 Ibs) TV RF System CCIR (M) Color System NTSC Sound System BTSC (Multi Channel Sound) Teletext System Closed Caption (T1 - T4 / CC1 - CC4) TV Receiving Channels...

  • Page 3: Precaution

    SECTION 1 PRECAUTION SAFETY PRECAUTIONS (1) The design of this product contains special hardware, many (10) Isolation Check (Safety for Electrical Shock Hazard) circuits and components specially for safety purposes. For After re-assembling the product, always perform an isolation continued protection, no changes should be made to the original check on the exposed metal parts of the cabinet (antenna design unless authorized in writing by the manufacturer.

  • Page 4: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES VIDEO STATUS MTS STEREO Expression of a favorite screen can be chosen by the VIDEO The voice multiplex function of the MTS system is built in. STATUS function. (MTS = Multi channel Television Sound system) COMPONENT INPUT RETURN PLUS Since the component signal input terminal is equipped, it...
  • Page 5 TECHNICAL INFORMATION 2.3.1 MAIN MI-COM (CPU) PIN FUNCTION Pin name I/O Function Pin name Function A_MUTE O Audio muting [Muting : H] 29 YC_GND AFT1 AFT voltage for tuner (Tuning frequency control) 30 V1_IN Not used Key scan for front control [No signal : H] 31 ABCL Current for automatic beam (brightness)/contrast limit uP_DVss...

  • Page 6: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER 3.1.4 CHECKING THE MAIN PWB (1) Disconnect the power plug. To check the PW Board from back side. (2) Remove the 7 screws [A]. (1) Pull out the MAIN PWB (refer to REMOVING THE MAIN (3) Remove the 4 screws [B].
  • Page 7 FRONT CABINET CRT SOCKET PWB SPEAKER MAIN PWB PWB STOPPER REAR COVER POWER CORD Fig.1 (No.YA050B)1-7...
  • Page 8 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 3.2.2 SERVICE MODE SETTING ITEMS 1.
  • Page 9 3.2.3 SETTINGS OF FACTORY SHIPMENT 3.2.3.1 BUTTON OPERATION 3.2.3.2 REMOTE CONTROL DIRECT OPERATION Setting item Setting position Setting item Setting position POWER INPUT CHANNEL CH-02 CHANNEL CH-02 VOLUME VOLUME MUTING DISPLAY SLEEP TIMER VIDEO STATUS DYNAMIC 3.2.3.3 REMOTE CONTROL MENU OPERATION (1) PICTURE ADJUST (3) CLOCK / TIMERS Setting item...
  • 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 • DC voltmeter (or digital voltmeter) REMOTE CONTROL UNIT and the other is the • Oscilloscope conventional method using adjustment parts and •...
  • Page 12 ADJUSTMENT LOCATIONS CRT SOCKET PWB (Within MAIN PWB ASS'Y) TP-B CRT EARTH (BRAIDED ASS'Y) TP-E (SOLDER SIDE) FRONT MAIN PWB VOL+ VOL- MENU POWER POWER SPEAKER MEMORY IC702 F901 IC201 TP-E( T111 R926 CW TRANSF. IC421 S401 1:X-RAY V. CENTER SW 2:GND 3:X-RAY TP-91(B1)
  • Page 13 BASIC OPERATION OF SERVICE MODE SUB MENU 7.LOW LIGHT SERVICE MENU 1.V/C(S) 2.DEF(D) 3.SOUND(A) 4.OTHERS(F) 7.LOW LIGHT 8.HIGH LIGHT 9.VCO 11.I2C BUS SELECT BY EXIT BY EXIT OPERATE BY BRIGHT 1.V/C(S) 4 : 3 8.HIGH LIGHT BRIGHT 2.DEF(D) 9.VCO 4 : 3 TOO HIGH GOOD TOO LOW...
  • Page 14 4.6.1 TOOL OF SERVICE MODE OPERATION Operate the SERVICE MODE with the REMOTE CONTROL UNIT. 4.6.2 SERVICE MODE ITEMS In general, basic setting (adjustments) items or verifications are performed in the SERVICE MODE. 1. V/C (S) This sets the setting values of the VIDEO circuit. 2.
  • Page 15 4.6.6 SERVICE MODE SETTING 1. V/C, 2. DEF 7. LOW LIGHT • Press [CH+] / [CH-] key The settings for WHITE BALANCE(LOW LIGHT) control For scrolling up/down the adjustment item. circuit. • Press [VOL+] / [VOL-] key NOTE: For scrolling up/down the data values. The setting value will be stored automatically when release NOTE: the REMOTE CONTROL UNIT keys.
  • Page 16 INITIAL SETTING VALUE OF SERVICE MODE (1) Adjustment of the service menu is made on the basis of the initial setting values. however, the new setting values which displays on the screen in its optimum condition may differ from the initial setting value. (2) Do not change the initial setting values of the items not listed in "ADJUSTMENT PROCEDURE".
  • Page 17 4.7.2 [2. DEF(D)] Initial setting value Variable Setting item range EXTERNAL (S / COMPOSITE) AFC GAIN 000 - 003 H POSI 000 - 031 V SIZE 000 - 125 V S CORR 000 - 015 V LIN 000 - 015 H SIZE 000 - 063 WVMT TOP...
  • Page 18 ADJUSTMENT PROCEDURE 4.8.1 CHECK ITEM Measuring Item Test point Adjustment part Description instrument B1 POWER Signal R927 : TP-91 (1) Receive the black and white signal. (color off) SUPPLY generator HEAT SINK (2) Connect the DC voltmeter to the TP-E and TP-91 (IC421) : TP-E (R927).
  • Page 19 4.8.4 DEFLECTION CIRCUIT Measuring Item Test point Adjustment part Description instrument V. SIZE / Signal [2.DEF (D)] (1) Receive the crosshatch signal. V. POSITION generator D03: V SIZE (2) Select 2.DEF(D) from the SERVICE MODE. (3) Adjust V. CENTER SW to agree the vertical center Remote V.
  • Page 20 4.8.5 VIDEO CIRCUIT Measuring Item Test point Adjustment part Description instrument WHITE Signal [1.V/C (S)] (1) Receive the all black signal. BALANCE generator S01: BRIGHT (2) Select the 1.V/C (S) from the SERVICE MODE. (LOW LIGHT) S11: R CUTOFF (3) Confirm the initial setting value of < S11 > (R Remote S12: G CUTOFF CUTOFF), <...

  • Page 21: Troubleshooting

    Measuring Item Test point Adjustment part Description instrument Remote [1.V/C (S)] (1) Receive any broadcast. CONTRAST control unit S02: PICTURE (2) Select the 1.V/C (S) from the SERVICE MODE. (3) Select < S02 > (PICTURE). (4) Set the initial setting value of < S02 >. (5) If the contrast is not the best with the initial setting value, make fine adjustment of the <...
  • Page 22 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.YA050B) Printed in Japan...
  • Page 23 SCHEMATIC DIAGRAMS COLOR TELEVISION AV-27530 CD-ROM No.SML200511 BASIC CHASSIS COPYRIGHT © 2005 Victor Company of Japan, Limited. No.YA050B 2005/11...
  • Page 24 AV-27530 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 25 CRT SOCKET PWB CIRCUIT DIAGRAM ....................2-9 PATTERN DIAGRAMS ................2-11 MAIN PWB PATTERN ..........................2-11 CRT SOCKET PWB PATTERN ......................... 2-13 USING P.W. BOARD PWB ASS'Y name AV-27530/SC MAIN P.W. BOARD SFE-1039A-M2 CRT SOCKET P.W. BOARD SFE-3001A-M2 SEMICONDUCTOR SHAPES TRANSISTOR...

  • Page 26: Block Diagram

    BLOCK DIAGRAM IC851 AV SW TU001 IC101 V. OUT TUNER IF DET IC251 Y/C SEP A. OUT INPUT 1 L1/R1 L3/R3 Y/V2 Y, R-Y, B-Y L2/R2 INPUT 2 COMPONENT VIDEO COMP_IN MTS D L3/R3 INPUT 3 AUDIO OUT L/R AUDIO IC201 R/G/B CUTOFF/...
  • Page 27 CRT SOCKET PWB Q301 R/G/B Q321 RGB OUT IC651 MTS DECODE/AUDIO CONTROL TONE VOLUME SURROUND CONTROL CONTROL MTS DECODE MAIN CPU/CLOSED CAPTION DECODE/ VIDEO PROCESS/RGB PROCESS/ SYNC. SEP/DEF PROCESS GENERATE SPEAKER L MICOM CLOSED IC602 CAPTION DECODER AUDIO OUT SPEAKER R IC702 HORIZONTAL MEMORY...

  • Page 28: Circuit Diagrams

    CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/2) SHEET1 SDA0 BBE_SW SDA0 SCL0 SCL0 COM_IN C665 C662 C667 C668 1/50 3.3/50 33/50 C666 C664 C661 C659 C652 C651 C663 D661 1/50 C861 1/50 10/50 .47/50 R652 100/10 1/50 47/25 C858 0.01 D803 R655 R653...
  • Page 29 MODE MODE MODE NOTE : Refer to the part list for the part number of IC702. DC ( V ) DC ( V ) DC ( V ) PIN NO. PIN NO. PIN NO. IC101 IC651 Q131 11.6 BBE_SW 5V_STB C610 Y602 C608...
  • Page 30 MAIN PWB CIRCUIT DIAGRAM (2/2) SHEET 2 MAIN PWB(1/2) SHEET 1 CN0PW R991 2.7M V-OUT F901 VA901 C901 T901 LF901 D921 D922 STBVCC C921 D923 D924 C902 C922 Q921 D933 D925 R921 R922 MAIN_PW RY901 R923 CNDEG TH901 C904 .001 D901 C999 C998...
  • Page 31 IC421 R403 C408 C406 R404 .001 R406 R405 C405 D402 K401 C413 C409 C403 C407 R402 R407 R408 4.7K R413 C404 C410 .0022 R412 R411 R414 D401 R415 C412 C411 2200 R416 S401 R409 R410 C526 R541 R524 .082 220K R525 D521 180K...

  • Page 32: Crt Socket Pwb Circuit Diagram

    CRT SOCKET PWB CIRCUIT DIAGRAM SHEET 3 L341 R323 1.5K R303 R302 R322 1.5K R311 R301 R321 Q301 Q321 C322 C302 270p 330p C321 C301 R306 R305 R326 R325 R324 R304 3.3K 3.3K CN30T GND-T MAIN PWB(1/2) CN00T SHEET 1 D334 R335 3.9K...
  • Page 33 SK351 TP-G TP-B SK351 R313 1.5K R312 SK351 R311 Q311 Y343 C312 270p C311 R315 R316 GND-U CN30SC C343 .001 R314 3.3K CN0E1 TP-E MODE DC ( V ) PIN NO. Q301 168.9 Q311 165.8 Q321 166.4 Q331 -0.7 OCKET PWB ASS'Y Q301-C Q311-C Q321-C...

  • Page 34: Pattern Diagrams

    PATTERN DIAGRAMS MAIN PWB PATTERN R903 D903 Y855 Y854 R902 C909 D902 W468 R831 R907 R802 J002 R906 R908 J004 R803 R833 W460 C910 J003 R691 C683 C833 Y686 K922 C686 D832 W111 C831 J001 Y856 T921 Y852 W106 Q851 W446 R685 R863...
  • Page 35 R534 R533 R831 R006 TU001 D522 R005 R532 C001 C531 Y685 R531 D833 R939 C833 R526 C007 R003 D526 C004 C832 D832 C006 D524 R004 C003 R938 D831 R541 C002 R936 T521 R528 D521 D932 W435 C526 C005 Y101 C102 R105 C101 C525...

  • Page 36: Crt Socket Pwb Pattern

    CRT SOCKET PWB PATTERN W353 R313 R306 R305 R316 R316 R315 R315 Q311 Q301 Y343 R303 R301 C311 C311 R301 R311 C301 R333 SK351 C342 D334 Y341 R334 TP-E R325 R325 R322 C322 2-13(No.YA050B)
  • Page 37 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY VIDEO DISPLAY CATEGORY 12, 3-chome, Moriya-cho, kanagawa-ku, Yokohama-city, kanagawa-prefecture, 221-8528, Japan (No.YA050B) Printed in Japan...
  • Page 38 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 39  L01 QQW0120-001 DEG COIL  T521 QQH0175-001 FB TRANSF LC30271-001A-A PUSH KNOB LC30191-001C-A REMOCON LENS LC30376-001A-A POWER KNOB CM48006-006-C JVC MARK QZW0095-001 WIRE CLAMP WJY0013-011A-E BRAIDED ASSY  QAS0054-001 SPEAKER SP01/SP02(x2) QYSBSB4012ZA TAP SCREW M4 x 12mm(x4) CM48144-001-A PB STOPPER ...
  • Page 40 EXPLODED VIEW T521 (No.YA050B)3-3...
  • Page 41 PRINTED WIRING BOARD PARTS LIST Ref No. MAIN P.W. BOARD ASS'Y (SFE-1039A-M2) Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D832 MTZJ9.1C-T2 Z DIODE D833 MTZJ9.1C-T2 Z DIODE IC101 M52342FP-X D834 MTZJ9.1C-T2 Z DIODE IC201 TM8812CPDNG4N35 IC(MCU) D901...
  • Page 42 Ref No. Ref No. Part No. Part Name Description Local Part No. Part Name Description Local C401 QFVF1HJ-474Z MF CAPACITOR 0.47uF 50V J C709 NDC31HJ-220X C CAPACITOR 22pF 50V J C402 NCB31HK-102X C CAPACITOR 1000pF 50V K C711 QETN1EM-476Z E CAPACITOR 47uF 25V M C403 QENC1CM-106Z...
  • Page 43 Ref No. Ref No. Part No. Part Name Description Local Part No. Part Name Description Local R215 NRSA63J-562X MG RESISTOR 5.6kΩ 1/16W J R627 NRSA63J-101X MG RESISTOR 100Ω 1/16W J R216 NRSA63J-562X MG RESISTOR 5.6kΩ 1/16W J R631 QRX029J-3R3 MF RESISTOR 3.3Ω...
  • Page 44 Ref No. Ref No. Part No. Part Name Description Local Part No. Part Name Description Local R851 NRSA63J-101X MG RESISTOR 100Ω 1/16W J K255 QQR0621-002Z FERRITE BEADS R852 NRSA63J-101X MG RESISTOR 100Ω 1/16W J K401 QQR0582-001Z FERRITE BEADS R853 NRSA63J-101X MG RESISTOR 100Ω...
  • Page 45 PACKING PACKING PARTS LIST  Ref.No. Part No. Part Name Description Local CP11499-C15-A PACKING CASE LC10083-002B-A CUSHION ASSY (x4) CP30055-001-A TOP COVER QPA02503505 POLY BAG 25cm x 35cm RM-C203-1C REMOCON ------------ LITHIUM BATTERY R6P/AA ------------ WARRANTY CARD BT-52006-2Q  LCT1531-001A-A INST BOOK English/French BT-51034-2Q...

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