JVC LT-20B60SU Service Manual

Lcd panel television interi art

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Instructions manual (33 pages)

Istruzioni (32 pages)

Instructions manual (32 pages)

Table of Contents

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- Block Diagram
- Circuit Diagrams
  - Main Pwb Circuit Diagram
  - Av Jack Pwb Circuit Diagram
  - Front Control Pwb Circuit Diagram
  - Led Pwb Circuit Diagram
  - Headphone Jack Pwb Circuit Diagram
- Pattern Diagrams
  - Main Pwb Pattern
  - Av Jack Pwb Pattern
  - Front Control Pwb Pattern
  - Led Pwb Pattern
  - Headphone Jack Pwb Pattern

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SERVICE MANUAL

2005

YA303

PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14

LCD PANEL TELEVISION

LT-20B60SU,

LT-20B60SJ

No.YA303

2005/8

Chapters

Table of Contents

Summary of Contents for JVC LT-20B60SU

Page 1: Table Of Contents
LCD PANEL TELEVISION YA303 2005 LT-20B60SU, LT-20B60SJ TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
Page 2 SPECIFICATION Items Contents Dimensions ( W × H × D ) 64.4cm × 48.1cm × 20.0cm [Included stand] 64.4cm × 41.6cm × 8.8cm [TV only] Mass 8.9kg [Included stand] 7.4kg [TV only] Power Input DC12V (TV) AC220 ~ 240V 50Hz (Adaptor) Power Consumption 50W (Standby: 3.0W) TV RF System...
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 purposes. For continued protection, no changes should be isolation check on the exposed metal parts of the cabinet made to the original design unless authorized in writing by (antenna terminals, video/audio input and output terminals,...
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 INSTALLATION 1.3.1 HEAT DISSIPATION 1.3.3 NOTES ON HANDLING If the heat dissipation vent behind this unit is blocked, cooling (1) WHEN TAKING UNIT OUT OF A PACKING CASE efficiency may deteriorate and temperature inside the unit will When taking the unit out of a packing case, do not grasp rise.
Page 6 HANDLING LCD PANEL 1.4.1 PRECAUTIONS FOR TRANSPORTATION 1.4.2 OPTICAL FILTER (ON THE FRONT OF THE LCD PANEL) When transporting the unit, pressure exerted on the internal LCD (1) Avoid placing the unit under direct sunlight over a panel due to improper handling (such as tossing and dropping) prolonged period of time.
Page 7: Specific Service Instructions
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS FEATURES T-V LINK OFF TIMER When you have a T-V LINK compatible VCR connected to the This function can set the TV to automatically turn off after a set EXT-2 Terminal on the TV,it is easier to set up the VCR and to time.
Page 8 TECHNICAL INFORMATION 2.3.1 LCD PANEL This unit uses the flat type panel LCD (Liquid Crystal Display) panel that occupies as little space as possible, instead of the conventional CRT (Cathode Ray Tube), as a display unit. Since the unit has the two polarizing filter that are at right angles to each other, the unit adopts "normally black" mode, where light does not pass through the polarizing filter and the screen is black when no voltage is applied to the liquid crystals.
Page 9 BASIC OPERATION OF SERVICE MODE 2.4.5 SERVICE MODE SETTING ITEMS 2.4.1 HOW TO ENTER THE SERVICE MODE Setting Setting items Contents (1) Press [INFORMATION] key and [MUTING] key on the menu remote control unit simultaneously to enter the SERVICE Adjust Group ---- MODE SCREEN.
Page 10: Disassembly
SECTION 3 DISASSEMBLY DISASSEMBLY PROCEDURE NOTE: • Make sure that the power cord is disconnected from the outlet. • Pay special attention not to break or damage the parts. • When removing each board, remove the connectors as required. • Taking notes of the connecting points (connector numbers) makes service procedure manageable. •...
Page 11 INVERTER UNIT INVERTER SHEELD COVER MAIN PWB LCD PANEL UNIT SCART BRACKET (X9) BACK COVER SOCKET DOOR HEADPHONE JACK PWB FRONT CONTROL HANG METAL SIDE AV DOOR HINGE COVER AV-JACK SPEAKER FRONT PANEL FOOT ASSEMBLY METAL HINGE BRACKET FOOT SUPORT (No.YA303)1-11...
Page 12 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 SETTINGS OF FACTORY SHIPMENT 3.2.1.1 BUTTON OPERATION 3.2.1.2...
Page 13 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 14: Adjustment
SECTION 4 ADJUSTMENT This service manual does not describe ADJUSTMENT. SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. 1-14 (No.YA303)
Page 15 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA303) Printed in Japan...
Page 16 ENGLISH DEUTSCH FRANÇAIS ITALIANO LT-20B60SU LCD PANEL TV INSTRUCTIONS LCD-TV-GERÄT BEDIENUNGSANLEITUNG PANNEAU LCD TELEVISEUR MANUEL D'INSTRUCTIONS TV A SCHERMO LCD ISTRUZIONI 50066101 ©2004 VICTOR COMPANY OF JAPAN, LIMITED 1004TKH-VT-VT...
Page 17 Contents For your safety Some “DOs” and “DON’Ts” for you...
Page 18 DON’T DON’T DON’T DON’T DON’T ** Cold cathode fluoresant lamp in LCD PANEL contains a small amount of mercury, please DON’T follow local ordinates or regulations for dis- posal. DON’T DON’T DON’T...
Page 19 WARNING • Fingers may be trapped under the TV causing injuries. Hold the TV at the bottom in the middle, and do not allow the stand to tilt up or down. • The TV may fall causing injuries. Hold the bottom of the stand with your hand and tilt the TV up and down.
Page 20: Important Information
Important Information Please take note EXCLUSION CLAUSE WARNING! NEVER LEAVE A Care and disposal STATIONARY IMAGE ON THE SCREEN...
Page 21 Remote Control Buttons...
Page 22: Control Panel Buttons
Control Panel Buttons 32:(5 /$03 ,1)5$5(' 5(&(,9(5 3($.(5 3($.(5 0(18 92/80( 352*5$0 '2:1 '2:1 92/80( 352*5$0 79$9 +($'3+21( 7$1'%<...
Page 23: Using The Stand
Using the stand How to remove the stand @HPW@ÃUC@ #ÃT8 @XT TU6I9...
Page 24 Installing TV on the wall...
Page 25: Before Switching On Your Tv
Preparation Before Switching on your TV Power connection 68Ãhqhƒ‡‚… ‚ÃQPX@S DIQV Ã98Ã !ÃW ‡r…€vhy Features Connections to the RF input socket 67G@ÃUWÃ WÃS@6SÃQ6I@G...
Page 26: How To Connect Other Devices
How to connect other devices Switching the TV ON/OFF To switch the TV on Inserting batteries in the remote control handset To switch the TV off NOTE: Remove the batteries from remote con- trol handset when it is not to be used for a long period.
Page 27 T-V Link Initial Settings First A.P.S. (Automatic Programming System) ÃÃWÃGvx 9PXIGP69Ã WÃ 3ÃW8S S6ITA@S...
Page 28: Operating The Tv
Operating the TV You can operate your TV using both the re- mote control handset and onset buttons. Operating with the buttons on the Operating with Remote Control...
Page 29: Menu System
Menu System MAIN MENU Hint: The channel list numbers are assigned by the broad- Picture Menu casters. Because not all channels are broadcast free-to-air and stored by the receiver, the channel list numbers do not run continuously. The fifteenth channel in the list, for ex- ample, may not be channel number 15 but channel number...
Page 31 Note 1: At low signal level, the changings on the Noise Reduction function are not effective when there is menu on the screen. If the menu is removed, the effect of this function is seen. At normal broadcasting, Noise Reduction changings are effec- tive at once.
Page 32 Feature Menu Install Menu...
Page 33 Program Menu...
Page 34 Caution: Using “Delete” or “Insert” function rewrite the current chan- nel list in the Program menu. Therefore, the programme num- bers of some of channels will change. Source Menu...
Page 35: Other Features
6RXUFH 79 (;7 (;7 (;7 6 (;7 (;7 6 3& Other Features TV Status Picture Mode Sound Indicator Sleep Timer 0RQR 6WHUHR 'XDO , Mute Indicator 'XDO ,, Hyper Sound...
Page 36 No-Signal Detection (TV mode) Zoom Modes No-Signal and Out Of Range Detection (PC mode) No input signal detected Signal out of range Volume Bar EXT Modes...
Page 37: Main Menu In Pc Mode
PC Mode Installation $ÃQvÃHvvÃ9TˆiÃ8‚rp‡‚… Main Menu in PC mode 8ÃHrˆ 8Ã vp‡ˆ…rÃ ‚†v‡v‚ 8Ã vp‡ˆ…r T‚ˆq T‚ˆ…pr ÃÃ !#Ã‘Ã&%' C)Ã#'ÃxC“ÃÃÃW)Ã%ÃC“ PC Picture Position Menu...
Page 38 PC Picture Menu Sound in PC mode Sound Menu Source Menu 6RXUFH 3& (;7 (;7 (;7 6 (;7 (;7 6 3&...
Page 39 Teletext To Select Double Height Text To operate Teletext To Reveal “concealed” Information To Stop Automatic Page Change To select a page of Teletext To Select a Subcode Page To Select Index Page Searching for a teletext page while watching TV...
Page 40 Peripheral Equipment Connections To exit Teletext Via the Euroconnector Fastext and Toptext T-V Link compatible VCR RGB mode EXT-2 S Mode Via the RCA jacks...
Page 41 Via the ANT (aerial) socket NTSC Playback Camera and Camcorder Decoder Connect the decoder to the video recorder Connecting Headphones Connecting the PC TV and Video Recoder (VCR) To connect to S-Video input...
Page 42 Peripheral Equipment Connections $8',2 /5 (;7 9,'(2 ,1 & 69,'(2 ,1 '& ,1 $'$3725 3& ,1387 (;7 (;7 $17(11$ 3& $8',2 ,1...
Page 43: Antenna Connections
Antenna Connections 2XWGRRU $QWHQQD &RQQHFWLRQV CAÃh‡rh S‚ˆqÃ&$Ã‚u€Ãp‚h‘vhyÃphiyr rh…Ã‚sÃUW Ayh‡Ã"‚u€Ã‡vÃyrhqÃphiyr CAVCAÃh‡rh rh…Ã‚sÃUW S‚ˆqÃ&$‚u€Ãp‚h‘vhyÃphiyr Peripheral Equipment Connections V9DPÃÃDI WD9@PÃDI 2 8 7 17,1 &$0&25'(5...
Page 44: Pc Input Typical Display Modes
PC Input Typical Display Modes 5HVROXWLRQ )UHTXHQF\ 0RGH +RUL]RQWDO 9HUWLFDO +RU N+] 9HU +] ...
Page 45 PC Picture Tips Can not turn the TV on? Sound Can not turn the TV off? Care of the Screen Remote Control Colours of image on screen are abnormal No solution No Image on Display Screen...
Page 46: Specifications
Specifications Model Item LT-20B60SU Broadcasting Systems PAL SECAM BG, DK, I, L, Lp Channels and VHF (VL) : 46,25 MHz - 168,25 MHz Frequencies VHF (VH) : 175,25 MHz - 463,25 MHz UHF : 471,25 MHz - 863,25 MHz Cable TV : (S1-S20/ S21-S41)
Page 47: 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 48: Exploded View Parts List
EXPLODED VIEW ............................... 3-3 PRINTED WIRING BOARD PARTS LIST ........................3-4 PACKING ................................... 3-10 PACKING PARTS LIST ............................. 3-10 USING P.W. BOARD & REMOTE CONTROL UNIT P.W.B ASS'Y LT-20B60SJ LT-20B60SU ← MAIN P.W.B VE-20191734 ← FRONT CONTROL P.W.B VE-20174624 ←...
Page 49: Exploded View
EXPLODED VIEW (X9) (X4) (X4) (X2) (X6) (X4) (X5) (No.YA303)3-3...
Page 50: Printed Wiring Board Parts List
PRINTED WIRING BOARD PARTS LIST Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local D107 VE-30007169 DIODE D108 VE-30025773 Z DIODE IC10 VE-30001670 PREAMPLIFIER TFMS5360 D109 VE-30025773 Z DIODE IC100 VE-30020865 IC D111 VE-30007169 DIODE IC101 VE-30032066 IC...
Page 51 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C138 VE-30000371 CAPACITOR EL 22uF 50V M C409 VE-30000345 E CAPACITOR 10uF 50V M C139 VE-30000371 CAPACITOR EL 22uF 50V M C410 VE-30012590 CAPACITOR 47nF 50V K C146 VE-30000109 CAPACITOR MKT...
Page 52 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local C707 VE-30012589 CAPACITOR 4.7nF 50V K C794 VE-30012582 CAPACITOR 10nF 50V K R C708 VE-30016654 CAPACITOR 100nF 16V K R C795 VE-30012581 CAPACITOR 1nF 50V K R C709 VE-30000315 CAPACITOR 220nF 25V Z...
Page 53 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R105 VE-30012641 RESISTOR 1/16W 10K J R321 VE-30012692 RESISTOR 1/16W 4.7K J R105 VE-30000712 RESISTOR CF 1/4W 470R J R322 VE-30012695 RESISTOR 1/16W 470R J R106 VE-30012641 RESISTOR 1/16W 10K J...
Page 54 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R416 VE-30018254 RESISTOR SARRAY 1/16W 10R J R707 VE-30012685 RESISTOR 1/16W 33K J R417 VE-30018254 RESISTOR SARRAY 1/16W 10R J R708 VE-30012715 RESISTOR 1/16W 82K J R425 VE-30012695 RESISTOR 1/16W 470R J...
Page 55 Ref No. Part No. Part Name Description Local Ref No. Part No. Part Name Description Local R931 VE-30012641 RESISTOR 1/16W 10K J VE-30040411 CNAS 4P/300 FLT W/C+FER UL2547AWG24 R933 VE-30012510 RESISTOR 1/16W 100R J PL100 VE-30030582 CONN MALE 6P MOLEX VERTICAL R934 VE-30012510 RESISTOR 1/16W 100R J...
Page 56: Packing Parts List
PACKING PACKING PARTS LIST  Ref.No. Part No. Part Name Description Local VE-50067837 CARTON BOX LT-20B60SJ VE-50066088 CARTON BOX LT-20B60SU VE-20177761 SNOW BOX (FRONT) VE-20177954 SNOW BOX (BACK) VE-30039453 REMOTE CONTROL UNIT (RM-C1861)  VE-30029332 AC ADAPTOR DC12V 6A VE-30002375...
Page 58 LT-20B60SJ, LT-20B60SU 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 59 AV JACK PWB PATTERN ........................2-25 FRONT CONTROL PWB PATTERN ......................2-25 LED PWB PATTERN ..........................2-26 HEADPHONE JACK PWB PATTERN ....................... 2-26 USING P.W. BOARD P.W.B ASS’Y name LT-20B60SJ LT-20B60SU MAIN P.W. BOARD VE-20191734 FRONT CONTROL P.W. BOARD VE-20174624 AV JACK P.W. BOARD VE-20214362 HEADPHONE JACK P.W.
Page 60: Block Diagram
BLOCK DIAGRAM TFT-LCD PANEL SIDE AV S-VIDEO IN SDRAM CVBS IN 2MX32bits Audio Amplifier LVDS TDA3002D2 DS90C385MTD MST9883C S-VIDEO CVBS MAIN OUT LR IN LR R (0-7) B (0-7) G (0-7) SCALER V SYNC SC1_OUT_LR H SYNC SC2_OUT_LR DENTERLACER LINE OUT LR GM6015 SC1_IN_LR AUDIO PROCESSOR...
Page 61: Circuit Diagrams
CIRCUIT DIAGRAMS MAIN PWB CIRCUIT DIAGRAM (1/8) MAIN PWB ASS'Y (1/8) VE-20191734 C162 C175 +3.3V C165 C174 C172 C164 C163 220p 220p 100n 100n 220p 100n VCC3_M HS_PCOUT 157 AHS_CS RAMDQ16 6015_HSOUT 158 ARAWHS_CS RAMDQ17 R141 159 ACREF RAMDQ18 160 AHREF_DE RAMDQ19 VCC3_M 161 VSS_21...
Page 62 MAIN PWB CIRCUIT DIAGRAM (2/8) NOTE : Refer to the part list for the part number of IC301 and IC302. MAIN PWB ASS'Y (2/8) VE-20191734 S322 5VSTBY S321 R381 PL306 S+3.3V S312 S312 OFF INVERTED LOGIC R361 S314 BRT_ADJ BRT_ADJ S315 R380 C327...
Page 63 MAIN PWB CIRCUIT DIAGRAM (3/8) IC402 C490 IC403 R_SEL 16 ROUT R1IN R_SC R434 RGB_SW 100n C433 R_TXT 15 FBRIN 220n C436 R_SC1 330p R431 C489 R_SC2 FB_SC1 C432 +12V 14 VCC R2IN R_TXT R432 R_SC FB_SC2 G_TXT 100n C425 220n C435 C488...
Page 64 MAIN PWB CIRCUIT DIAGRAM (4/8) MAIN PWB CIRCUIT DIAGRAM (5/8) L504 L501 +5V_TU_IF 100n BLM21A601S CVBS_BAV R518 Video Matrix C606 SIOMAD 100R TU500 IC600 100n R504 R508 C601 100R TAGC 100R CVBS_SC1 1 INPUT1 INPUT8 SCL_5V R626 Q603 470R C510 X500 BC848B R506...
Page 65 R710 FRONT_AUDIO_L 1N4148 +5V_DIGITAL 100R 100R C795 C796 C700 C702 C769 C770 FRONT_AUDIO_R 100u 100n TOSHIBA: S728 D725 D700 JVC: L729 C797 BACK_AUDIO_L L729 BZT55C12 BZT55C3V6 LINE_OUT_L LINE_OUT_R R764 C851 CVBS_BAV 100n BLM21A601S TOSHIBA: S725 S726 C720 JVC: S723 S724...
Page 66 MAIN PWB CIRCUIT DIAGRAM (7/8) PL801 MAIN PWB ASS'Y (7/8) VE-20191734 23"SAMSUNG OPTION PL803 L802 PANEL_VCC_FIL BLM21A601S S810 ODSEL1 S811 S805 S807 IC800 +3.3V LVDS_3.3V S806 VCC1 TXIN4 C828 C829 100n TXIN5 TXIN3 TXIN6 TXIN2 TXIN7 GND5 GND1 TXIN1 L803 330R_100MHZ_3A TXIN8 TXIN0...
Page 67 MAIN PWB CIRCUIT DIAGRAM (8/8) IC904 JK901 C941 100n S900 F900 C900 100u IC902 F902 L900 STDBY_ +3.3V F901 L901 L911 R907 100R R903 Q901 L902 C903 C904 C908 C938 R902 BC848C R908 100u 1000u 100u Q900 100uH ST_BY 100k 100R BC848C PL901...
Page 68: Av Jack Pwb Circuit Diagram
LED PWB CIRCUIT DIAGRAM AV JACK PWB CIRCUIT DIAGRAM LED PWB ASS'Y VE-20198076 AV JACK PWB ASS'Y VE-20214362 FRONT CONTROL PWB CIRCUIT DIAGRAM HEADPHONE JACK PWB CIRCUIT DIAGRAM HP_R HP_L MENU VOL+ VOL- HEADPHONE JACK PWB VE-20177874 HEAD_PHONE C100 C101 C808 R102 R103...
Page 69: Pattern Diagrams
PATTERN DIAGRAMS MAIN PWB PATTERN [SOLDER SIDE] (No.YA303)2-21 2-22(No.YA303)
Page 70 MAIN PWB PATTERN [PARTS SIDE] (No.YA303)2-23 2-24(No.YA303)
Page 71: Av Jack Pwb Pattern
AV JACK PWB PATTERN LED PWB PATTERN [SOLDER SIDE] LED PWB PATTERN [PARTS SIDE] HEADPHONE JACK PWB PATTERN [SOLDER SIDE] FRONT CONTEROL PWB PATTERN FRONT HEADPHONE JACK PWB PATTERN [PARTS SIDE] (No.YA303)2-25 2-26(No.YA303)
Page 72 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY DISPLAY CATEGORY 12, 3-chome, Moriya-cho, Kanagawa-ku, Yokohama-city, Kanagawa-prefecture, 221-8528, Japan (No.YA303) Printed in Japan...

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JVC LT-20B60SU Service Manual

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