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YHi LT32C1M1 Service Manual

32" color tft lcd television (ntsc).
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Ya Hsin Industrial Co., Ltd.
Service Manual
Revision:
1.00
Date:
16-Apr.-2006
Model Name: LT32C1M1
32" Color TFT LCD Television (NTSC)

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Table of Contents

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   Summary of Contents for YHi LT32C1M1

  • Page 1 Ya Hsin Industrial Co., Ltd. Revision: 1.00 Date: 16-Apr.-2006 Service Manual Model Name: LT32C1M1 32" Color TFT LCD Television (NTSC)
  • Page 2: Product Description

    1.0 Product Description 1.1 Introduction 1.2 Features 1.3 General Information 1.4 Outline Dimension 2.0 Engineering Specifications AU T315XW01 2.1 TFT LCD Panel Specifications: 2.2 Optical Characteristics 2.3 I/O Connectors 2.4 D-Sub (Analog) Input 2.5 PC Audio Input (line-in) 2.6 ISP (In System Programming) 2.7 Analog Compliant...
  • Page 3: Mechanical Assembly

    5.0 Mechanical Assembly 5.1 Explore Diagram 5.2 Removal and Replacement 5.2.1 Remove and Replace Stand 5.2.2 Remove and Replace Video board 5.2.3 Remove and Replace Rear cover 5.2.4 Remove and Replace Front RCA board and Card Reader(Option) 5.2.5 Remove and Replace Main board 5.2.6 Remove and Replace Power board 5.2.7 Remove and Replace Panel 6.0 Troubleshooting...
  • Page 4 1.0 Product Description Introduction The purpose of this service manual provides integral information for the qualified skillful technicians need to maintain the LT32CxM1 (32.0- inches TFT-LCD TV). 1.2 Features 32" wide screen WXGA (1366*768)TFT LCD panel Analog PC signal input 16 - CCFTs (Cold Cathode Fluorescent Tube) Supported to 85Hz refresh rate Supported to 16.7M colors display...
  • Page 5 Product Description 1.3 General Information Display area 697.68(H) x 392.26(V) Number of Pixels 1366 x R.G.B. x 768 Pixels Pixel pitch 0.51075(H) x 0.51075(W) Pixel arrangement RGB Vertical Stripe LCD Panel Display color 16.7 M Display mode Normally Black Viewing Angle Horizontal: 170 degrees (typical) Degree...
  • Page 6 Product Description 1.4 Outline Dimension Width 111111 111111 Height 593 (656 with stand) 111111 Depth 130 (231 with stand) ¢II[IHN$$$N[H[!$$$Nn$1$11$@I$$1N!N$% ....84_ ....................... 230,37 654,4 Physical Characteristics Weight Gross Weight 24.24 Kg (without card reader) / 24.44 Kg (with card reader) Net Weight 19.4 kg (without card reader) / 19.6 Kg (with card reader) Color...
  • Page 7: Engineering Specifications

    Engineering Specifications 2.0 Engineering Specifications 2.1 TFT Panel Specifications: AU T315XW01 Active matrix thin-film-transistor (TFT) Signal Interface LVDS (Low Voltage Differential Signaling) (2 pixel/clock) Screen Size 31.51" Diagonal inch Effective Display size 697.68(H) x 392.26(V) Pixel Number 1366 x R.G.B. x 768 Pixels Color filter arrangement RGB vertical stripe...
  • Page 8 Engineerin_ Specifications 2.2 Optical Characteristics Measuring requirement 110[v]/60[Hz] Input AC Power Center Contrast setting Maximum Brightness setting Lighting Outside optical interception Measurement point Center (Brightness Uniformity is 5 point) Distance from LCD module 50[cm] View of measurement machine 1 [degree] Warm up time 30[mini Measuring...
  • Page 9 Engineering Specifications 0 _tical Specification Ox=O Contrast Ratio (Center Viewing of Screen) normal angle Response time Gray to Gray Luminance of White Chr°C°nlatricitY(cIE) _rl_e_ White CR>10 Viewing Angle Hor. Ver. Luminance Uniformity Definition of Contrast Ratio (CR): Luminance with all pixels white Luminance with all oixels...
  • Page 10 Engineering Specifications ® Response time is the time required for the display to transfer between any two gray level. It is defined as the following figure. A.y _i_h [ fighter gray level Any darker gray level T:rl_ ® Surface Luminance is a measurement of the active display area, 50 cm from the center of the surface in condition of displaying window pattern.
  • Page 11 En_ineerin_ Specifications Viewing angle is the angle at which the contrast ratio is greater than 10 (CR> 10) with window pattern. The angle is determined for the horizontal or x-axis and the vertical y-axis with respect to the z-axis which is normal to the LCD surface. Normal 0x = 0y = 0 °...
  • Page 12 En_ineerin_ Specifications 2.3 I/O Connectors I/O Table TV tuner NTSC Y2Pb2Pr2in & RCA audio(L/R) AV Video in & RCA audio(L/R) S-Video in & RCA audio(L/R) D-SUB PC audio in HDMI AV Video out & audio (R/L) out Earphone Subwoofer 2.4 D-Sub (Analog) Input Electrical...
  • Page 13 En_ineerin_ Specifications 2.5 PC Audio Input (line-in) Input Voltage (typical) Vp_p Output Power l0 W per channel 2.6 ISP (In System Programming) - Only for Engineering BIOS update through 4-pin connector, operated by authorized technician. 2.7 HDMI (High-Definition Multimedia Interface) TMDS DATA 2+ TMDS DATA 0 Shield SCL (DDC Clock)
  • Page 14 Functions & OSD Operation 2.9 Power Supply specification & Power Management Power Supply specification Vendor FSP FSP232-4M01 (first source) AC 90 - 264 Vac Input Voltage Range 47/63 Hz Input Frequency Range Output Voltage 5V, 16V, 24V+ 5% Output Current 1.2A(5V), 5.5A(12V), 5.5A(24V) -232W (max.)
  • Page 15 Functions & OSD Operation 2.11 Packaging Specification Carton Box Dimension Outside dimension: 1005(W)*772(H)*305(D) ...... ! C,_9 FCC Label © {1)This device may rw_t cause hsrm_u _tede_'ece, Model Number:LT32C1Pl ® h'_#ut:AC _00-240V 50-60Hz 3 5A _@{s_fact_r_g ONe ......SIN: ......
  • Page 16 Functions & OSD Operation 2.12 Environmental Characteristics Operating Conditions 20-80% Humidity Non-Operating Conditions 20-85% Humidity Altitude Not more than 12,000m Non-Operating 2.12 Safety 2.12.1 Insulation Resistance The resistance of the insulation between the power terminal and the earth ground contact is more than 10 MR while withstanding a voltage of 3kV(DC).
  • Page 17 Functions & OSD Operation Test Criteria There is no breakdown of the insulators or short circuits when applying a 2.6kVac and 2.6k "¢ac for duration of lnaxilnum 3 sec between the metallic chassis and the input power supply active and neutral terminals connected together.
  • Page 18 Functions & OSD Operation Functions & OSD Operation Function Controls Front side: Power Power on/off (2) Source Source select ® Menu Get into OSD t\_r PC/TV mode ® CH • Select channel ® CH • Select channel ® VOL I_ Control volume ©...
  • Page 19: Back Side View

    Functions & OSD Operation Back side: 3onnecting to the Video component! output terminal of the video output device _,udio input terminal connecting to the audio output terminal of the video output device. (_J) Y2Pb2Pr2 Sonnecting to the Video component2 output terminal of the video output device Y2Pb2Pr2 Audio _,udio input terminal connecting to the audio output terminal of the video output device.
  • Page 20 Functions & OSD Operation Remote Controller Pure TV Full function Power Power on/off Display Display current inforlnation Select TV Audio system Mute Turn speaker on or off Source Select input source Get into TV channel directly Selectsthe soundmode:Off->SRSWOW->BBE->BBE& SRSWOW model Sound (Standard cannot select...
  • Page 21 Functions & OSD Operation 3.30SD Operating Procedures The menu consists of six main items for user's option. Include : MENU, CHv, CH A, 4VOL, VOL I_and Enter: 1. Press "Menu" key into the OSD menu. Use "CHv", "CHA" to scroll the options on the menu. 2.
  • Page 22: System Descriptions

    System description 4.0 System descriptions 4.1 System block diagram BLOCK D_GRAM (I_SC)
  • Page 23 System description 4.2 System Block Diagram Audio Processor ( NTSC ) iiiiii iiiiiiii:ii_ii_!i!!iiii_!i!ii!i_iiiii!i_iiiii!ii!ii!ii!ii!ii!i...
  • Page 24 System description 4.3 System Circuitry 4.3.1 Main board (J3) To RCA board (J9) To Panel (JP7) To Speaker (34) To Power board (J1) To Card reader (Option) (J6) To Inverter board (J5) To DVD (Option) (CNS) To IR board (CN7) To Video board (J8)
  • Page 25 System description 4.3.3 Power board To Main board To Inverter board To Main board To AC input socket 4.3.4 Front board To Video board I To Main board .13 ]...
  • Page 26 System description 4.3.5 board To Main board CN1 4.4 Pin Configuration CN1 : To Key board Connector +3.3 V VIN2 ADC2_return ADC VRFE ADC1 return Vinl Ground CN5 : To IR board Connector Ground IR_I Saving Power LED...
  • Page 27 System description J1 : To Card Reader Connector (Option) CARD IR Ground J2 : To Video board CN2 Connector (Component PR out Ground PY out Ground PB out Ground Ground J3 : To Earphone Connector Ground L OUT Mode R OUT J4 : To Power board Connector Ground...
  • Page 28: Black-light

    System description J5 : To DVD Connector (Option) DVD_IR Ground J6 : To Inverter Connector 1NV ON/OFF (ON/OFF Control) BLACK-LIGHT (Brightness Control) Ground J7 : To S _eaker Speaker Speaker Speaker Speaker J8 : To Power board Connector +5VS +5VS Ground Ground Power_off...
  • Page 29 System description J9 : To Panel Connector Ground Ground TXB0+ TXB0- TXA0+ TXBI+ TXA0- TXB 1- TXAI+ TXB2+ TXA1- TXB2- TXA2+ Ground TXA2 - Ground Ground TXBC+ Ground TXBC- TXAC+ Ground TXAC - Ground Ground TXB3+ Ground TXB3- TXA3+ Ground TXA3- Ground...
  • Page 30 System description 5.0 Mechanical Assembly 5.1 Explore Diagram 5.2 Removal and Replacement 5.2.1 Remove and Replace Stand 1. Remove Screw PN: 066-00581-00 Reverse procedure for Replacement 5.2.2 Remove and Replace Video board 1. Remove Screws P _',_:066-00848-00 1. Remove Screw PN: 066-00575-00...
  • Page 31 System description 1. Remove Screw PiN: :066-00844-00 2. Remove Screw PiN: 066-00610-00 1. Remove Screw PN: 066-00615-00 2. Remove Screw PiN: 066-00669-00 Remove Screw P/N:066-00578-00...
  • Page 32 System description 5.2.3 Remove and Replace Rear Cover Relnove Screw PN: 066-00742-00 Remove Screw PN: 066-00742-00 P/N: 066-00850-00 Remove Screw Remove Screw PiN: 066-00742-00 Remove the rear cover after removing all the above screws. I Reverse procedure for Replacement...
  • Page 33 System description 5.2.4 Remove and Replace Front RCA board Card Reader (option) 1. Remove Screws PN: 066-00610-00 (For Card Reader) 2. Remove Screws PN: 066-00610-00 (For front RCA board) Reverse procedure for Replacement 5.2.5 Remove and Replace Main board 1. Remove the connectors 2.
  • Page 34 System description Remove Screw P/N:066-00614-00 Remove Screw P/N:066-00578-00 I Reverse procedure for Replacement...
  • Page 35 System description 5.2.6 Remove and Replace Power board 1. Remove Screws P/N: 066-00614-00 I 2. Remove the connectors 3. Remove Screws P/N: 066-006577-00 Reverse procedure for Replacement 6. Remove Screws...
  • Page 36 System description 5.2.7 Remove and Replace Panel 1. Remove Screw and take the panel ass'y fiom fiont bezel P/N: 066-00575-00...
  • Page 37 System description 2.Remove Panel connecting wire. 1.Remove Inverter connecting wire. I 3. Remove Screw P/N: 066-00849-00 Reverse procedure for Replacement...
  • Page 38: Troubleshooting

    System description 6.0 Troubleshooting Guide Item Symptom Inspection points No Power, No Picture, No Check Power board AC input. Backlight, No Sound Check Power board DC output (+SVs, +SV, +16V). Check J4 of Main board and connecting wire. Check J8 of Main board and connecting wire. Check J6 of Main board and connecting wire.
  • Page 39 System description Item Symptom Inspection points Can't r eceive T VorCable 1.Check Video board. program Card Reader problem 1. Check J 1 (Main board) toCard Reader connecting wire. (Option) 2. Check C ard Reader. 3. Check M ainboard.
  • Page 40: Rear Cover

    System description 7.0 Spare Parts Material List Part Name Part No. Q'D" Unit Location BATTERY 001-00015-00 043-40074-00 077-102t0-R0000 LABEL;Protron(PLTV-32M) PCS FCC LABEL 077-20112-00 BARCODELABEL(_ CARTON LABEL:Prosonic 077-20164-00300 077-20346-R0000 LABEL;FOR HDMI LOGO 077-80019-00100 gg _g +_;PLTV-30&PLTV-27 083-11428-00 083-11930-R0100 _I" ,}_;Protron(PLTV-32M); _ _a;R 1 PCS MANUAL+BATTERY 083-31130-00 083-31232-00000...
  • Page 41 System description PartNo. Part Name Location Q'O- [;nit 004-14105-00000 BRACKET;PANEL SIDE(AU) 004-14111-00000 BRACKET;TV BD IO(AV) 004-14113-00000 BRACKET;STAND NECK 004-14144-R0100 BRACKET;MAIN BD IO(HDMI) 004-14145-R0100 BRACKET;TV BD IO;TV2 004-14147-R0000 BRACKET;TV BD 004-14148-R0000 BRACKET;MAIN Between M/B & 019-10007-00 Shield-M/B 022-0065A-00500 CASE;TV COVER TOP(AV _p_q) 022-0066A-00100 CASE;TV COVER BOTTOM;R1 022-0067A-00000...
  • Page 42 System description Item PartNo. PartName Location Unit 066-00653-00 SCREW;ZINC 066-00667-00 SCREW ZINC 066-00742-00 SCREW;BLACK 066-00844-00000 SCREW;ZINC 066-00846-00000 SCREW 066-00848-00000 SCREW;BLACK 066-00849-00000 SCREW;ZINC 066-00851-00000 SCREW;W/WASHER;ZINC 066-00943-00000 SCREW;ZINC 076-75075-00000 MYLAR;CARD READER;LT32C 1P1 076-77001-00 _g,_ _ ga 083-95034-R0006 _ _g}g ;Meet Rohs 083-95046-00006 g_;g}g 092-10248-00 BUTTON...
  • Page 43 System description Item Part No. Part Name Location Unit 971-10616-00 DIP PCBA K/B 971-1031C-00000 DIP PCBA IR+LED BOARD 971-10579-01 DIP FRONT RCA BOARD;REV.E Approved by: Jerry Prepared C{iffChang...

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