JVC D Series Service Manual
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JVC D Series Service Manual

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  • Page 2 SERVICE MANUAL COLOR TELEVISION YA073 2004 AV-27D305 AV-27D305 BASIC CHASSIS TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 3 SPECIFICATION Items Contents Dimensions (W × H × D) 75.2cm × 59.0cm × 53.1cm (29-5/8" × 23-1/4" × 23") Mass 32.2kg (70.8lbs) TV RF System CCIR (M) Color System NTSC Sound System BTSC (Multi Channel Sound) TV Receiving Channels VHF Low 02ch~06ch : 54MHz~88MHz and Frequency VHF High...

  • Page 4: 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 5: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES SMART SOUND V-CHIP Decreases high sound levels, giving a regulated sound level. Since the V-CHIP is built in, it can choose, view and listen to a healthy program. SMART CAPTION SMART CAPTION will appear when you press the MUTING MTS STEREO button, only on channels where the broadcast contains closed The voice multiplex function of the MTS system is built in.
  • Page 6 TECHNINAL INFORMATION 2.4.1 MAIN MI-COM (CPU) PIN FUNCTION Pin name I/O Function Pin name Function MTS_ADJ Not used 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 7: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE 3.1.1 REMOVING THE REAR COVER 3.1.4 CHECKING THE PW BOARD (1) Unplug the power plug. (1) Pull out the MAIN PWB (refer to REMOVING THE MAIN (2) Remove the 11 screws [A] (Fig.1). PWB). (3) Remove the 4 screws [B] (Fig.1). (2) Erect the MAIN PWB vertically with the HVT side facing (4) Then remove the REAR COVER toward you.
  • Page 8 FRONT CABINET CRT SOCKET PWB MAIN PWB PWB STOPPER REAR COVER POWER CORD Fig.1 (No.YA073)1-7...
  • Page 9 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 10 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 OFF TIMER VIDEO STATUS DYNAMIC GAME SOUND HYPER SURROND OFF 3.2.3.3 REMOTE CONTROL MENU OPERATION (1) PICTURE ADJUST...
  • Page 11 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 12: 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 13 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 CW TRANSF. IC421 R926 S401 1:X-RAY 2:GND V. CENTER SW 3:X-RAY DOWN IC851...
  • Page 14 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) 5.3L Y/C(LYC) 7.LOW LIGHT 8.HIGH LIGHT 9.VCO 11.I2C BUS 12.SYSTEM(SYS) SELECT BY EXIT BY EXIT OPERATE BY BRIGHT 1.V/C(S) 8.HIGH LIGHT 4 : 3 BRIGHT 2.DEF(D) 9.VCO 4 : 3...
  • Page 15 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 16 4.6.6 SERVICE MODE SETTING 1. V/C, 2. DEF 7. LOW LIGHT • Press [CH+] / [CH-] key The settings for LOW LIGHT is described in the WHITE For scrolling up/down the adjustment item. BALANCE page of ADJUSTMENT PROCEDURE. • Press [VOL+] / [VOL-] key NOTE: For scrolling up/down the data values.
  • Page 17 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 18 Initial setting value AV-27D305/R Variable Setting item RF / EXTERNAL (S / COMPOSITE) EXTERNAL (COMPONENT) range STANDARD THEATER STANDARD THEATER HIGH HIGH HIGH HIGH R CUT OFF 0 ~ 255 G CUT OFF 0 ~ 255 B CUT OFF 0 ~ 255 R DRIVE 0 ~ 127 B DRIVE...
  • Page 19 4.7.2 [2. DEF(D)] Initial setting value Variable AV-27D305/R AV-27D305/S Setting item range EXTERNAL EXTERNAL (S / COMPOSITE) (S / COMPOSITE) V FREQ 0 ~ 3 AFC GAIN 0 ~ 3 H POSI 0 ~ 31 H POSI+- -128 ~ +127 V PHASE 0 ~ 7 V PH+-...
  • Page 20 0 ~ 1 SYS19 VOL MUTE 0 ~ 1 SYS20 VCHIP 0 ~ 1 SYS21 VCHIP CA 0 ~ 1 SYS22 CCD 0 ~ 1 SYS23 HYPSCAN 0 ~ 1 SYS24 JVC LOGO 0 ~ 1 SYS25 PANORAMA 0 ~ 1 (No.YA073)1-19...
  • Page 21 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 22 4.8.4 DEFLECTION CIRCUIT Measuring Item Test point Adjustment part Description instrument V. SIZE / Signal [2.DEF(D)] (1) Receive the cross-hatch signal. V. POSITION generator D07 : V SIZE (2) Select 2.DEF(D) from the SERVICE MODE. (3) Select the < D07 >(V SIZE). Remote V.
  • Page 23 4.8.5 VIDEO CIRCUIT Measuring Item Test point Adjustment part Description instrument WHITE Signal [1.V/C (S)] (1) Receive the black and white signal ( color off ). 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 <...
  • Page 24 Measuring Item Test point Adjustment part Description instrument WHITE Signal [1.V/C (S)] (1) Receive the black-and-white signal (color off). BALANCE generator S14: R DRIVE (2) Select the 1.V/C (S) from the SERVICE MODE. (HIGH LIGHT) S15: B DRIVE (3) Set the initial setting value of < S14 > (R DRIVE) and Remote <...
  • Page 25 4.8.6 MTS CIRCUIT Measuring Item Test point Adjustment part Description instrument MTS INPUT Remote [3.SOUND (A)] (1) Receive the any broadcast. LEVEL control unit A01: IN LEVEL (2) Select the 3.SOUND (A) from the SERVICE MODE. (3) Select the < A01 > (IN LEVEL). (4) Set the intal setting value of the <...

  • Page 26: Troubleshooting

    SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. (No.YA073)1-25...
  • Page 27 JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. www.jvcservice.com(US Only) JVC CANADA INC. Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 (416)293-1311 (No.YA073) Printed in Japan...

  • Page 28: 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 29: Exploded View Parts List

    EXPLODED VIEW PARTS LIST -1  Ref.No. Part No. Part Name Description Local  GQ30025-002A-A CONTROL KNOB  LC30191-004A-A REMOCON LENS  GQ30026-002A-A POWER KNOB CM48006-007-C JVC MARK  100 GQ10018-004A-A FRONT CABINET ASSY Inc.No.101  101 GQ30024-002A-A DOOR EXPLODED VIEW -1 3-2(No.YA073)
  • Page 30 EXPLODED VIEW PARTS LIST -2  Ref.No. Part No. Part Name Description Local  V01 A68ADT25X01 Inc.DEF YOKE/PC MAGNET AV-27D305/R  V01 A68QDN891X001 Inc.DEF YOKE/PC MAGNET AV-27D305/S  L01 CE41329-00DJB DEG COIL  T1521 QQH0129-001 FB TRANSF CHGB0016-0C BRAIDED ASSY CHGB0015-0B BRAIDED ASSY QAS0054-001...
  • Page 31 EXPLODED VIEW -2 CRT SOCKET PWB (Within MAIN PWB) T1521 (x4) (x11) 3-4(No.YA073)
  • Page 32 PRINTED WIRING BOARD PARTS LIST [AV-27D305 MAIN P.W. BOARD ASS'Y (SFE-1044A-M2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D1687 MTZJ9.1C-T2 Z DIODE D1688 MTZJ9.1C-T2 Z DIODE IC1101 M52342FP-X D1705 1SS133-T2 DIODE IC1201 TM8812CSDNG5DB9 IC(MCU) D1751...
  • Page 33 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C1272 NCB31HK-103X C CAPACITOR 0.01uF 50V K C1656 NCB31HK-473X C CAPACITOR 0.047uF 50V K C1273 NCB31HK-103X C CAPACITOR 0.01uF 50V K C1657 QETN1HM-335Z E CAPACITOR 3.3uF 50V M C1274 NDC31HJ-181X...
  • Page 34 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R1003 NRSA63J-221X MG RESISTOR 220Ω 1/16W J R1356 NRSA63J-123X MG RESISTOR 12kΩ 1/16W J R1004 NRSA63J-221X MG RESISTOR 220Ω 1/16W J R1359 NRSA63J-103X MG RESISTOR 10kΩ...
  • Page 35 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R1692 NRSA63J-823X MG RESISTOR 82kΩ 1/16W J R1928 QRE121J-272Y C RESISTOR 2.7kΩ 1/2W J R1701 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J R1929 QRE121J-223Y C RESISTOR 22kΩ...
  • Page 36 PRINTED WIRING BOARD PARTS LIST [AV-27D305 MAIN P.W. BOARD ASS'Y (SFE-1041A-M2) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D1687 MTZJ9.1C-T2 Z DIODE D1688 MTZJ9.1C-T2 Z DIODE IC1101 M52342FP-X D1705 1SS133-T2 DIODE IC1201 TM8812CSDNG5DB9 IC(MCU) D1751...
  • Page 37 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C1272 NCB31HK-103X C CAPACITOR 0.01uF 50V K C1656 NCB31HK-473X C CAPACITOR 0.047uF 50V K C1273 NCB31HK-103X C CAPACITOR 0.01uF 50V K C1657 QETN1HM-335Z E CAPACITOR 3.3uF 50V M C1274 NDC31HJ-181X...
  • Page 38 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R1003 NRSA63J-221X MG RESISTOR 220Ω 1/16W J R1356 NRSA63J-123X MG RESISTOR 12kΩ 1/16W J R1004 NRSA63J-221X MG RESISTOR 220Ω 1/16W J R1359 NRSA63J-103X MG RESISTOR 10kΩ...
  • Page 39 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R1692 NRSA63J-823X MG RESISTOR 82kΩ 1/16W J R1928 QRE121J-272Y C RESISTOR 2.7kΩ 1/2W J R1701 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J R1929 QRE121J-223Y C RESISTOR 22kΩ...

  • Page 40: Packing Parts List

    REMOTE CONTROL UNIT PARTS LIST (RM-C1259G-1H)  Ref.No. Part No. Part Name Description Local UR77EC0603B BATTERY COVER PACKING PACKING PARTS LIST  Ref.No. Part No. Part Name Description Local GQ10009-007C-A PACKING CASE GQ10019-001B-A CUSHION ASSY 4pcs in 1set CP30055-001-A TOP COVER CP30056-008-A POLY BAG QPA02503505...
  • Page 41 SCHEMATIC DIAGRAMS COLOR TELEVISION YA073 2004 AV-27D305 AV-27D305 BASIC CHASSIS CD-ROM No.SML200403 COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED No.YA073 2004/3...

  • Page 42: Standard Circuit Diagram

    AV-27D305 AV-27D305 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 43: Block Diagram

    CONTENTS SEMICONDUCTOR SHAPES ..............2-2 BLOCK DIAGRAM ..................2-3 CIRCUIT DIAGRAMS ..................2-5 MAIN PWB CIRCUIT DIAGRAM ........................ 2-5 PATTERN DIAGRAMS ................2-9 MAIN PWB PATTERN ..........................2-9 CHANNEL CHART (US) ................2-11 CHANNEL CHART (CA) ................2-12 SEMICONDUCTOR SHAPES TRANSISTOR BOTTOM VIEW FRONT VIEW TOP VIEW CHIP TR...

  • Page 44: S-Video Input

    BLOCK DIAGRAM IC851 AV SW TU001 IC101 V. OUT TUNER IF / DET IC251 Y/C SEP A. OUT INPUT 1 L1/R1 IC641 L3/R3 Y/V2 L2/R2 Y, R-Y, B-Y INPUT 2 COMPONENT VIDEO COMP_IN MTS DECODE L3/R3 INPUT 3 AUDIO OUT L/R AUDIO MAIN CPU/CLOS IC201...
  • Page 45 CRT SOCKET PWB Q301 R/G/B Q321 RGB OUT MTS DECODE/AUDIO CONTROL VOLUME TONE SURROUND CONTROL CONTROL U/CLOSED CAPTION DECODE/ ROCESS/RGB PROCESS/ EP/DEF PROCESS ERATE SPEAKER L MICOM OSED IC602 IC601 PTION CODER AUDIO OUT SPEAKER R IC702 MEMORY _OUT YOKE IC421 VERT OUT Q521...
  • Page 46 CIRCUIT DIAGRAMS IC101-22 IC201-6 IC201-7 IC201-13 IC201-14 IC201-18 MAIN PWB CIRCUIT DIAGRAM (1/2) SHEET1 15 Vp-p 4.3 Vp-p 3.9 Vp-p 5 Vp-p 5 Vp-p S751 S752 S753 S754 QSW0619-003Z QSW0619-003Z QSW0619-003Z QSW0619-003Z Q751 R756 1.2k D751 R751 R752 R753 R754 LG22440 1.5k 2.7k...
  • Page 47 C201-18 IC201-26 IC201-28 IC201-37 IC201-39 IC201-40 IC-201-41 2 Vp-p 0.4 Vp-p 0.7 Vp-p 0.47 Vp-p 3.5 Vp-p 3 Vp-p 3.5 Vp-p MODE MODE MODE MODE DC ( V ) DC ( V ) DC ( V ) DC ( V ) J007 J006 J005...
  • Page 48 MAIN PWB CIRCUIT DIAGRAM (2/2) SHEET 2 IC421-1 IC421-3 IC421-5 IC421-6 1.3 Vp-p 4.2 Vp-p 50 Vp-p 34 Vp-p Q301-C Q311-C Q321-C 120Vp-p 120 Vp-p 110 Vp-p Q501-C Q501-B Q521-B Q521-C T521-2 T521-3 T521-4 T521-5 T521-7 200 Vp-p 0.8 Vp-p 3 Vp-p 1200 Vp-p 8 Vp-p...
  • Page 49 MODE DC ( V ) PIN NO. IC 421 27.6 CRT SOCKET PWB ASS'Y SK351 A68ADT25X01 [AV-27D305/R] A68QDN891X001 [AV-27D305/S] SFE-1041A-M2 [AV-27D305/S] QNZ0537-001 15.8 R302 SFE-1044A-M2 [AV-27D305/R] R303 2WOMR 28.6 1.5k1/2W Q301 IC 901 2SC4075/DE/YA11 R301 C302 330p5% C301 R305 R306 32.2 R304 3.3k...
  • Page 50 PATTERN DIAGRAMS MAIN PWB PATTERN R903 Y855 Y854 R902 C909 W920 R907 R831 R802 J002 D903 D902 R908 R006 R906 J004 W919 R803 R833 R005 C910 Y686 J003 D684 C683 C833 D833 R691 Y856 C831 C007 W802 Y685 D906 C907 C832 Q681 W801...
  • Page 51 FRONT R534 R533 TU001 D522 R006 R532 R005 R526 R938 R531 C001 D526 C007 R003 R939 C004 R004 C006 W508 D832 C003 R541 R936 C531 C002 T521 C005 D932 D521 R528 Y101 C526 C102 R105 C101 C525 Q101 R008 C528 C104 CF001 W504...
  • Page 52 CHANNEL CHART (US) MODE CHANNEL MODE CHANNEL TUNER TUNER BAND BAND BAND BAND CATV REAL DISP. CATV REAL DISP. W+35 W+36 W+37 W+38 W+39 W+40 W+41 W+42 W+43 W+44 W+45 W+46 W+47 W+48 W+49 W+50 W+51 W+52 W+53 W+54 W+55 W+56 W+57 W+58...
  • Page 53 CHANNEL CHART (CA) MODE CHANNEL MODE CHANNEL TUNER TUNER BAND BAND BAND BAND CATV REAL DISP. CATV REAL DISP. W+35 W+36 W+37 W+38 W+39 W+40 W+41 W+42 W+43 W+44 W+45 W+46 W+47 W+48 W+49 W+50 W+51 W+52 W+53 W+54 W+55 W+56 W+57 W+58...
  • Page 54 JVC SERVICE & ENGINEERING COMPANY OF AMERICA DIVISION OF JVC AMERICAS CORP. www.jvcservice.com(US Only) JVC CANADA INC. Head office : 21 Finchdene Square Scarborough, Ontario M1X 1A7 (416)293-1311 (No.YA073) Printed in Japan...

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