JVC LT-19DA9BJ Service Manual
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JVC LT-19DA9BJ Service Manual

JVC LT-19DA9BJ Service Manual

Integrated digital terrestrial lcd television
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SERVICE MANUAL
INTEGRATED DIGITAL TERRESTRIAL LCD TELEVISION
3 S ERVICE MANUAL
YA683<Rev.001>
2009
LT-19DA1BJ
COPYRIGHT © 2009 Victor Company of Japan, Limited
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16
/AK

TABLE OF CONTENTS

COPYRIGHT © 2009 Victor Company of Japan, Limited
, LT-19DA1BU
/AK
No.YA683<Rev.001>
2009/3

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  • Page 1: Table Of Contents

    SERVICE MANUAL INTEGRATED DIGITAL TERRESTRIAL LCD TELEVISION YA683<Rev.001> 2009 3 S ERVICE MANUAL LT-19DA1BJ , LT-19DA1BU COPYRIGHT © 2009 Victor Company of Japan, Limited TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION Contents Items LT-19DA1BJ LT-19DA1BU Dimensions ( W × H × D ) 38.46 cm × 47.5 cm × 19.0 cm (With stand)] 34.53 cm × 47.5 cm × 9.45 cm (Without stand)] Mass 4.4 kg (With stand) 4.1 kg (Without stand) Power Input AC220V - AC240 V, 50 Hz Power Consumption...

  • Page 3: Precaution

    SECTION 1 PRECAUTION SAFETY PRECAUTIONS [EXCEPT FOR UK] (1) The design of this product contains special hardware, (6) Isolation Check (Safety for Electrical Shock Hazard) many circuits and components specially for safety After re-assembling the product, always perform an isola- purposes.
  • Page 4 SAFETY PRECAUTIONS [FOR UK] (1) The design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits.
  • Page 5 1.3.3 INSTALLATION REQUIREMENTS 1.3.4 INSTALLATION REQUIREMENTS Ensure that the minimal distance is maintained, as specified To ensure safety in an emergency such as an earthquake, and below, between the unit with and the surrounding walls, as well to prevent accidents, ensure that measures are taken to prevent as the floor etc.Install the unit on stable flooring or stands.Take the TV dropping or falling over.

  • Page 6: Specific Service Instructions

    This function can change the screen size according to the pictures can be displayed on your TV in their digital form. picture aspect ratio. MAIN DIFFERENCE LIST Contents Items LT-19DA9BJ LT-19DA9BU Teletext System (Digital) MHEG 5 UK profile EBU TEXT POWER CORD UK TYPE (3-pins)
  • Page 7 STANDARD NOTES FOR SERVICING 2.3.4 HOW TO REMOVE / INSTALL FLAT PACK-IC 2.3.1 CIRCUIT BOARD INDICATIONS 2.3.4.1 REMOVAL (1) The output pin of the 3 pin Regulator ICs is indicated as WITH HOT-AIR FLAT PACK-IC DESOLDERING MACHINE: shown. (1) Prepare the hot-air flat pack-IC desoldering machine, then apply hot air to the Flat Pack-IC (about 5 to 6 Top View Bottom View...
  • Page 8 WITH SOLDERING IRON: WITH IRON WIRE: (1) Using desoldering braid, remove the solder from all pins (1) Using desoldering braid, remove the solder from all pins of the flat pack-IC. When you use solder flux which is of the flat pack-IC. When you use solder flux which is applied to all pins of the flat pack-IC, you can remove it applied to all pins of the flat pack-IC, you can remove it easily.
  • Page 9 2.3.4.2 INSTALLATION 2.3.5 INSTRUCTIONS HANDLING SEMI- (1) Using desoldering braid, remove the solder from the foil of CONDUCTORS each pin of the flat pack-IC on the PWB so you can install Electrostatic breakdown of the semi-conductors may occur due a replacement flat pack-IC more easily. to a potential difference caused by electrostatic charge during (2) The mark on the flat pack-IC indicates pin 1.

  • Page 10: Disassembly

    SECTION 3 DISASSEMBLY DISASSEMBLY FLOWCHART This flowchart indicates the disassembly steps for the cabinet Removal parts, and the CBA in order to gain access to item(s) to be ser- viced. When reassembling, follow the steps in reverse order. Step/ Remove/*Unhook/ Bend, route and dress the cables as they were.
  • Page 11 [4] Rear Cabinet (L-1) (S-4) (S-3) (S-4) (L-1) (L-1) (S-4) (L-1) (S-4) (L-1) (S-1) (S-4) [3] Stand Hinge [2] Stand Neck (S-2) [1] Stand Cover Fig. D1 (No.YA683<Rev.001>)1-11...
  • Page 12 [16] Front Cabinet [7] Digital Main (S-9) (S-10) Unit Connector IC Card OSU (S-9) [15] Speaker [6] Shield Box [14] LCD Module Assembly (S-8) (S-14) (S-5) [15] Speaker (S-6) (S-8) (S-7) (S-14) (S-5) [5] Jack PWB (S-8) [9] Main PWB FFC Shield [8] Shield(T) (S-11b)

  • Page 13: Adjustment

    SECTION 4 ADJUSTMENT GENERAL NOTE: “PWB” IS ABBREVIATION FOR PURITY CHECK MODE “CIRCUIT BOARD ASSEMBLY.” This mode cycles through full-screen displays of red, green, blue, NOTE: and white to check for non-active pixels. Electrical adjustments are required after replacing circuit (1) Enter the Service mode.
  • Page 14 VCOM ADJUSTMENT. WHITE BALANCE ADJUSTMENT The following adjustment normally are not attempted in the field. Test Point Adj. Point Only when replacing the LCD Panel then adjust as a preparation. PURPOSE: Screen To mix red, green and blue beams correctly for pure white. buttons SYMPTOM OF MISADJUSTMENT: M.
  • Page 15 HOW TO VERIFY THE PROTECT MODE HOW TO INITIALIZE THE LCD TELEVISION The Sub CPU always surveys the power supply circuit. If the ab- (1) Turn the power on. normal voltage is detected on the power supply circuit, a voltage (2) To enter the service mode.

  • Page 16: Troubleshooting

    SECTION 5 TROUBLESHOOTING FLOW CHART NO.1 The power cannot be turned on. See FLOW CHART No.2 <The fuse blows out.> Is the fuse (F601) normal? Check if there is any leak or short-circuiting on the primary circuit component, and service it if defective. (IC601, Q600, Q601, D611, D613, D614, D616, T601, R610) Is the AL +12V line voltage normal?
  • Page 17 FLOW CHART NO.6 INV+22V is not output. Check D990, C902 and their periphery circuit, and service it defective. FLOW CHART NO.7 AL+3.3V is not output. Is approximately 8V voltage supplied to the cathode Check D924, C917 and their periphery circuit, and of D924? service it if defective.
  • Page 18 FLOW CHART NO.10 LCD+13V is not output. See FLOW CHART No.9 Replace Q922. FLOW CHART NO.11 LCD-6.8V is not output. Replace Q908. FLOW CHART NO.12 LCD+3.3V is not output. Replace Q902. 1-18 (No.YA683<Rev.001>)
  • Page 19 FLOW CHART NO.13 +3.5V is not output. Check if there is any leak or short-circuit on the loaded circuit, and service it if defective. FLOW CHART NO.14 P-ON+3.3V is not output. Replace IC902. FLOW CHART NO.15 P-ON+9V is not output. Is approximately 10V voltage supplied to the base of Q906? Replace Q906.
  • Page 20 FLOW CHART NO.17 No operation is possible from the remote control unit. Check AL+3.3V line and service it if defective. Replace the RS301 (remote control receiver) or remote control unit. Check the line between Pin(1) of RS301 (remote control receiver) and Pin(4) of CN104A, and service it if defective.
  • Page 21 FLOW CHART NO.19 Picture does not appear normally. Check the line between Pin(20, 22) of CN103A and Are the DIF signals outputted to the Pin(20, 22) of CN103A? Pin(16, 17) of TU501, and TU501(Tuner Unit), and service it if defective. Replace Digital Main PWB Unit or LCD Module Assembly.
  • Page 22 Victor Company of Japan, Limited Display Division 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA683<Rev.001>) Printed in Japan...
  • Page 23 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 24 CONTENTS USING P.W. BOARD ..............................3-2 EXPLODED VIEW PARTS LIST ..........................3-3 EXPLODED VIEW ............................... 3-4 PRINTED WIRING BOARD PARTS LIST [LT-19DA1BJ/AK] ..................3-6 MAIN P.W. BOARD ASS'Y (FU-1ESA19688-1) ....................3-6 FUNCTION P.W. BOARD ASS'Y (FU-1ESA19688-2) ..................3-8 IR SENSOR P.W. BOARD ASS'Y (FU-1ESA19688-3) ..................3-8 JACK P.W.

  • Page 25: Exploded View Parts List

    EXPLODED VIEW PARTS LIST  Ref.No. Part No. Part Name Description Local  FU-1EM023085 REAR CABINET  FU-1EM023353 FRONT CABINET  FU-UG190EB LCD PANEL UNIT FU-1EM222223A DECORATION PLATE FU-DSD0806XQ001 SPEAKER FU-DSD0806XQ001 SPEAKER FU-WAB0182K5002 POWER CORD LT-19DA1BJAK   FU-WAE0172LW006 POWER CORD LT-19DA1BUAK FU-1EM427137 REAR COVER...

  • Page 26: Exploded View

    EXPLODED VIEW 3-4(No.YA683<Rev.001>)
  • Page 27 SERIAL NO.LABEL RATING LABEL (No.YA683<Rev.001>)3-5...

  • Page 28: Printed Wiring Board Parts List [Lt-19Da1Bj/Ak]

    PRINTED WIRING BOARD PARTS LIST [LT-19DA1BJ/AK] MAIN P.W. BOARD ASS'Y (FU-1ESA19688-1) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D953 FU-QDTZ001SS133 SI DIODE D954 FU-QDTZ001SS133 SI DIODE FU-QPEL561L11AV PHOTO COUPLER IC601 D955 FU-QDTB00MTZJ39 ZENER DIODE IC801 FU-QSZBA0SMS017 IC...
  • Page 29 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C820 FU-CHD1JK30B392 C CAPACITOR 3900pF 50V K R739 FU-RRXAJR5Z0473 MG RESISTOR 47kΩ 1/10W J C822 FU-CE1JMASDL100 E CAPACITOR 10uF 50V M R740 FU-RRXAJR5Z0470 MG RESISTOR 470Ω...

  • Page 30: Function P.w. Board Ass'y (Fu-1Esa19688-2)

    Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R904 FU-RCX4JATZ0123 C RESISTOR 12kΩ 1/4W J JK725 FU-JXSJ020YUQ01 MINI JACK PC AUDIO IN FU-RRXAFR5H4701 MG RESISTOR 4.7kΩ 1/10W F JK751 FU-JXGJ210LY001 21P CONNECTOR SCART R906 R907...

  • Page 31: Inverter P.w. Board Ass'y (Fu-1Esa19502-1)

    INVERTER P.W. BOARD ASS'Y (FU-1ESA19502-1) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local L401B FU-LLC471KSF009 POWER INDUCTER FU-LTZ3PC0MS003 TRANS T401 Q401 FU-QQS002SA950F TRANSISTOR Q402 FU-NQS4KTC3199P TRANSISTOR Q403 FU-NQS4KTC3199P TRANSISTOR Q404 FU-NQS1KTA1267P TRANSISTOR Q405 FU-QQS02SC2120F TRANSISTOR JUNCTION P.W.

  • Page 32: Printed Wiring Board Parts List [Lt-19Da1Bu/Ak]

    PRINTED WIRING BOARD PARTS LIST [LT-19DA1BU/AK] MAIN P.W. BOARD ASS'Y (FU-1ESA19148-1) Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D953 FU-QDTZ001SS133 SI DIODE D954 FU-QDTZ001SS133 SI DIODE FU-QPEL561L11AV PHOTO COUPLER IC601 D955 FU-QDTB00MTZJ39 ZENER DIODE IC801 FU-QSZBA0SMS017 IC...
  • Page 33 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C820 FU-CHD1JK30B392 C CAPACITOR 3900pF 50V K R739 FU-RRXAJR5Z0473 MG RESISTOR 47kΩ 1/10W J C822 FU-CE1JMASDL100 E CAPACITOR 10uF 50V M R740 FU-RRXAJR5Z0470 MG RESISTOR 470Ω...

  • Page 34: Function P.w. Board Ass'y (Fu-1Esa19148-2)

    Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R904 FU-RCX4JATZ0123 C RESISTOR 12kΩ 1/4W J JK725 FU-JXSJ020YUQ01 MINI JACK PC AUDIO IN FU-RRXAFR5H4701 MG RESISTOR 4.7kΩ 1/10W F JK751 FU-JXGJ210LY001 21P CONNECTOR SCART R906 R907...

  • Page 35: Inverter P.w. Board Ass'y (Fu-1Esa19502-1)

    INVERTER P.W. BOARD ASS'Y (FU-1ESA19502-1) REFER TO PARTS LIST IN PAGE 3-9 FOR THIS P.W. BOARD. JUNCTION P.W. BOARD ASS'Y (FU-1ESA19502-2) REFER TO PARTS LIST IN PAGE 3-9 FOR THIS P.W. BOARD. (No.YA683<Rev.001>)3-13...

  • Page 36: Packing

    PACKING Packing Tape Packing Tape Tape Packing Tape SERIAL NO.LABEL Packing Tape 3-14(No.YA683<Rev.001>)

  • Page 37: Packing Parts List

    PACKING PARTS LIST  Ref.No. Part No. Part Name Description Local ------------ CARTON Not supply ------------ TOP CUSHION Not supply ------------ BOTTOM CUSHION Not supply ------------ SET BAG Not supply ------------ STAND BAG Not supply ------------ WARRANTY CARD BT-54038-1L ------------ POLY BAG Not supply 235mmx365mm ...
  • Page 38 SCHEMATIC DIAGRAMS INTEGRATED DIGITAL TERRESTRIAL LCD TELEVISION LT-19DA1BJ , LT-19DA1BU DVD-ROM No.SML2008Q4 No.YA683<Rev.001> COPYRIGHT © 2009 Victor Company of Japan, Limited. 2009/3...
  • Page 39 LT-19DA1BJ LT-19DA1BU 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 40 CONTENTS WIRING DIAGRAM [TV CABLE] ..............2-4 WIRING DIAGRAM ..................2-5 SYSTEM CONTROL BLOCK DIAGRAM ............2-7 VIDEO BLOCK DIAGRAM ................2-9 AUDIO-1 BLOCK DIAGRAM..............2-11 AUDIO-2 BLOCK DIAGRAM..............2-13 DIGITAL SIGNAL PROCESS BLOCK DIAGRAM ........2-15 INVERTER BLOCK DIAGRAM ..............2-17 POWER SUPPLY BLOCK DIAGRAM ............2-19 CIRCUIT DIAGRAMS ................

  • Page 41: Using P.w. Board

    USING P.W. BOARD P.W.B ASS’Y name LT-19DA1BJ/AK LT-19DA1BU/AK FU-1ESA19688-1 MAIN P.W. BOARD FU-1ESA19148-1 FU-1ESA19688-2 FUNCTION P.W. BOARD FU-1ESA19148-2 FU-1ESA19688-3 IR SENSOR P.W. BOARD FU-1ESA19148-3 JACK P.W. BOARD FU-1ESA19688-4 FU-1ESA19148-4 FU-1ESA19502-1 INVERTER P.W. BOARD FU-1ESA19502-2 JUNCTION P.W. BOARD FU-1ESA19709 DIGITAL MAIN P.W. BOARD FU-1ESA19153 SEMICONDUCTOR SHAPES TRANSISTOR...

  • Page 42: Wiring Diagram [Tv Cable]

    WIRING DIAGRAM [TV CABLE] To LCD PANEL UNIT INVERTER PWB JACK PWB JUNCTION PWB CN401 CN11 CL403 CN403B To LCD PANEL UNIT CN403A DIGITAL MAIN PWB CN4501 CN4502 CN402 CN3601 CN3701 CN4503 CN3704 CN451 MAIN PWB To Speaker CN106 CN104A CN101A CN102A CN103A...

  • Page 43: Wiring Diagram

    WIRING DIAGRAMS SP451 CN4502 CN4501 SPEAKER STH-F GND 55 R-CH BACK BACK AC601 54 GND VEEG LIGHT LIGHT AC CORD TU501 TUNER UNIT 53 FRSB2(+) 52 FRSB2(-) BRSB2(+) CN3701 CN101A CL451 51 FRSB1(+) BRSB2(-) P-ON+5V 50 FRSB1(-) BRSB1(+) P-ON+5V 49 FRSB0(+) BRSB1(-) CN802 AL+3.3V...

  • Page 44: System Control Block Diagram

    SYSTEM CONTROL BLOCK DIAGRAM IC4513 (MAIN MICRO CONTROLLER) RS301 CN3601 CN104A CN106 CN201 CN202 CN301 TO VIDEO REMOTE BLOCK REMOTE REMOTE REMOTE SENSOR DIAGRAM P-ON-H1 P-ON-H1 P-ON-H1 P-ON-H2 LED1 LED1 +3.3V KEY-IN1 KEY-IN1 D303 CN3701 CN101A STANDBY AF12 LED1 P-ON-H1 TO POWER AE12 KEY SWITCH...

  • Page 45: Video Block Diagram

    VIDEO BLOCK DIAGRAM VIDEO SIGNAL AUDIO SIGNAL TU501 (TUNER UNIT) IC3824 (DEMODULATOR) TO DIGITAL CN103A CN3704 SIGNAL DIF-OUT1 17 DIF-OUT1 TS-DATA PROCESS MPEG2-TS DEMODULATOR BLOCK DIF-OUT2 16 DIF-OUT2 INTERFACES DIAGRAM IF-AGC 15 IF-AGC 2 IF-AGC TO SYSTEM CONTROL BLOCK Q505 DIAGRAM VIDEO-OUT 6 BUFFER...

  • Page 46: Audio-1 Block Diagram

    AUDIO-1 BLOCK DIAGRAM AUDIO SIGNAL IC3825 CN11 CN107 JK14 (AUDIO A/D CONVERTER) COMP-AUDIO(L) COMPONENT AUDIO(L)-IN COMP-AUDIO(R) CN103A CN3704 BCLK (L-CH) JK15 AUDIO(L) LRCLK DIGITAL COMPONENT ACLK SIGNAL AUDIO(R) (R-CH) AUDIO(R)-IN CONVERTER PROCESS INPUT0 AUX-ADATA BLOCK INPUT1 ADATA1 DIAGRAM JACK PWB INPUT2 IC850 (INPUT SELECT)

  • Page 47: Audio-2 Block Diagram

    AUDIO-2 BLOCK DIAGRAM AUDIO SIGNAL CN802 CL802 IC802 SP802 (AUDIO D/A CONVERTER) IC801 (AUDIO AMP) SP(L) 1 SPEAKER SP-GND 2 L-CH CN3701 CN101A LRCLK (L-CH) DIGITAL LRCLK (L-CH) BCLK SIGNAL BCLK PROCESS ADATA CONVERTER ADATA (R-CH) BLOCK ACLK DIAGRAM MUTE ACLK /STANDBY VOLUME...

  • Page 48: Digital Signal Process Block Diagram

    DIGITAL SIGNAL PROCESS BLOCK DIAGRAM VIDEO SIGNAL AUDIO SIGNAL LCD PANEL UNIT IC4513 (DIGITAL SIGNAL PROCESS) IC4201(LCD DRIVE) DIGITAL MAIN PWB CN4501 BRSB2(+) TU-CVBS BRSB2(-) BRSB1(+) COMP-Y BRSB1(-) COMP-Pb BRSB0(+) COMP-Pr AF20 BRSB0(-) AE20 BRSG2(+) TO VIDEO VIDEO BLOCK AD19 BRSG2(-) S-VIDEO-Y DIAGRAM...

  • Page 49: Inverter Block Diagram

    INVERTER BLOCK DIAGRAM INVERTER PWB JUNCTION CN401 BACK LIGHT Q411 CL403 CN403A CN403B TO POWER OVER CURRENT FEEDBACK FEEDBACK SUPPLY T401 PROTECTOR BLOCK INV+22V INV+22V Q406 DIAGRAM +35V +35V SW+22V (CN105A) Q401 CURRENT CONTROL Q402 Q408 SWITCH TO SYSTEM CL403 CN403A CN403B CONTROL...

  • Page 50: Power Supply Block Diagram

    POWER SUPPLY BLOCK DIAGRAM CAUTION ! CAUTION ! NOTE: Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. For continued protection against fire hazard, The voltage for parts in hot circuit is measured using If Main Fuse (F601) is blown , check to see that all components in the power supply replace only with the same type fuse.

  • Page 51: Circuit Diagrams

    CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/3) MAIN PWB ASS'Y(1/3) MAIN PWB(3/3) FU-1ESA19688-1[LT-19DA1BJ/AK] FU-1ESA19148-1[LT-19DA1BU/AK] DIGITAL MAIN PWB (2/6) CN3701 MAIN PWB(3/3) MAIN PWB(2/3) MAIN PWB(2/3) MAIN PWB(3/3) FUNCTION PWB CN201 DIGITAL MAIN PWB (5/6) CN3704 A8CN8SCM1_12/15_1/3_0.0 (No.YA683<Rev.001>)2-21 2-22(No.YA683<Rev.001>)

  • Page 52: Main (2/3) And Jack Pwb Circuit Diagram

    MAIN (2/3) AND JACK PWB CIRCUIT DIAGRAM MAIN PWB(1/3) MAIN PWB(3/3) MAIN PWB(1/3) DIGITAL MAIN PWB(2/6) CN4503 MAIN PWB(1/3) JACK PWB ASS'Y MAIN PWB ASS'Y(2/3) FU-1ESA19688-4[LT-19DA1BJ/AK] FU-1ESA19688-1[LT-19DA1BJ/AK] FU-1ESA19148-4[LT-19DA1BU/AK] FU-1ESA19148-1[LT-19DA1BU/AK] A8CN8SCM2_1215_2/3_0.0 (No.YA683<Rev.001>)2-23 2-24(No.YA683<Rev.001>)
  • Page 53 MAIN PWB CIRCUIT DIAGRAM (3/3) MAIN PWB ASS'Y(3/3) FU-1ESA19688-1[LT-19DA1BJ/AK] FU-1ESA19148-1[LT-19DA1BU/AK] CAUTION ! Fixed voltage (or Auto voltage selectable) power supply circuit is used in this unit. CAUTION ! NOTE: If Main Fuse (F601) is blown , check to see that all components in the power supply For continued protection against fire hazard, The voltage for parts in hot circuit is measured using circuit are not defective before you connect the AC plug to the AC power supply.

  • Page 54: Inverter And Junction Pwb Circuit Diagram

    INVERTER AND JUNCTION PWB CIRCUIT DIAGRAM INVERTER PWB ASS'Y FU-1ESA19502-1 PANEL UNIT MAIN PWB(3/3) CN105A JUNCTION PWB ASS'Y FU-1ESA19502-2 A8CN8SCINV_1215_1/1_0.0 (No.YA683<Rev.001>)2-27 2-28(No.YA683<Rev.001>)

  • Page 55: Function Pwb Circuit Diagram

    FUNCTION PWB CIRCUIT DIAGRAM IR SENSOR PWB MAIN PWB(1/3) CN301 CN106 FUNCTION PWB ASS'Y FU-1ESA19688-2[LT-19DA1BJ/AK] FU-1ESA19148-2[LT-19DA1BU/AK] A8CN8SCF_1215_1/1_0.0 (No.YA683<Rev.001>)2-29 2-30(No.YA683<Rev.001>)

  • Page 56: Ir Sensor Pwb Circuit Diagram

    IR SENSOR PWB CIRCUIT DIAGRAM IR SENSOR PWB ASS'Y FU-1ESA19688-3[LT-19DA1BJ/AK] FU-1ESA19148-3[LT-19DA1BU/AK] FUNCTION PWB CN202 A8CN8SCIR_1215_1/1_0.0 (No.YA683<Rev.001>)2-31 2-32(No.YA683<Rev.001>)

  • Page 57: Digital Main Pwb Circuit Diagram

    DIGITAL MAIN PWB CIRCUIT DIAGRAM (1/6) DIGITAL MAIN PWB ASS'Y(1/6) This schematic is only for reference. Avoid replacing individual parts. FU-1ESA19709[LT-19DA1BJ/AK], FU-1ESA19153[LT-19DA1BU/AK] Relpace the entire PWB ASS'Y only. OPEN DIGITAL MAIN PWB(6/6) DIGITAL MAIN PWB(3/6) LCD PANEL UNIT LCD PANEL UNIT DIGITAL MAIN PWB(3/6) DIGITAL MAIN PWB(6/6) 1 NOTE:...
  • Page 58 DIGITAL MAIN PWB CIRCUIT DIAGRAM (2/6) This schematic is only for reference. Avoid replacing individual parts. Relpace the entire PWB ASS'Y only. DIGITAL MAIN PWB(3/6) DIGITAL MAIN PWB(3/6) MAIN PWB(1/3) CN101A DIGITAL MAIN PWB(6/6) MAIN PWB(2/3) CN102A DIGITAL MAIN PWB(5/6) DIGITAL MAIN PWB ASS'Y(2/6) FU-1ESA19709[LT-19DA1BJ/AK] FU-1ESA19153[LT-19DA1BU/AK]...
  • Page 59 DIGITAL MAIN PWB CIRCUIT DIAGRAM (3/6) This schematic is only for reference. Avoid replacing individual parts. Relpace the entire PWB ASS'Y only. DIGITAL MAIN PWB(2/6) DIGITAL MAIN PWB(1/6) DIGITAL MAIN PWB(6/6) DIGITAL MAIN PWB(2/6) DIGITAL MAIN PWB(1/6) DIGITAL MAIN PWB(5/6) DIGITAL MAIN PWB(6/6) DIGITAL MAIN PWB(4/6) DIGITAL MAIN PWB(2/6)
  • Page 60 DIGITAL MAIN PWB CIRCUIT DIAGRAM (4/6) This schematic is only for reference. Avoid replacing individual parts. Relpace the entire PWB ASS'Y only. DIGITAL MAIN PWB(6/6) DIGITAL MAIN PWB(3/6) HDMI CONNECTOR-1 DIGITAL MAIN PWB(6/6) CI CARD SLOT DIGITAL MAIN PWB ASS'Y(4/6) FU-1ESA19709[LT-19DA1BJ/AK] FU-1ESA19153[LT-19DA1BU/AK] DIGITAL MAIN PWB(5/6)
  • Page 61 DIGITAL MAIN PWB CIRCUIT DIAGRAM (5/6) DIGITAL MAIN PWB ASS'Y(5/6) This schematic is only for reference. Avoid replacing individual parts. FU-1ESA19709[LT-19DA1BJ/AK], FU-1ESA19153[LT-19DA1BU/AK] Relpace the entire PWB ASS'Y only. DIGITAL MAIN PWB(2/6) DIGITAL MAIN PWB(6/6) DIGITAL MAIN PWB(2/6) DIGITAL MAIN PWB(3/6) DIGITAL MAIN PWB(3/6) MAIN PWB(1/3) CN103A...
  • Page 62 DIGITAL MAIN PWB CIRCUIT DIAGRAM (6/6) This schematic is only for reference. Avoid replacing individual parts. Relpace the entire PWB ASS'Y only. DIGITAL MAIN PWB ASS'Y(6/6) FU-1ESA19709[LT-19DA1BJ/AK], FU-1ESA19153[LT-19DA1BU/AK] DIGITAL MAIN PWB(4/6) DIGITAL MAIN PWB(1/6) DIGITAL MAIN PWB(3/6) MAIN PWB(3/3) CN104A DIGITAL MAIN PWB(2/6) DIGITAL MAIN PWB(3/6) DIGITAL MAIN PWB(4/6)

  • Page 63: Pattern Diagrams

    PATTERN DIAGRAMS MAIN PWB PATTERN (No.YA683<Rev.001>)2-45 2-46(No.YA683<Rev.001>)

  • Page 64: Inverter Pwb Pattern

    INVERTER PWB PATTERN FUNCTION PWB PATTERN JACK PWB PATTERN FRONT JUNCTION PWB PATTERN IR SENSOR PWB PATTERN (No.YA683<Rev.001>)2-47 2-48(No.YA683<Rev.001>)

  • Page 65: Waveforms

    WAVEFORMS WF1 ~ WF7 = Waveforms to be observed at Waveform check points. (Shown in Schematic Diagram.) Input: PAL Color Bar Signal (with 1kHz Audio Signal) Pin 14 of IC801 Pin 1 of CN102A Pin 5 of CN102A VIDEO VIDEO 0.2V 0.2V 20µs...
  • Page 66 Victor Company of Japan, Limited Display Division 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA683<Rev.001>) Printed in Japan...

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Lt-19da9buLt-19da1bj/akLt-19da1bu/ak

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