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Hitachi L32A102 Service Manual
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Hitachi L32A102 Service Manual

Hitachi L32A102 Service Manual

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- NOTICE-
All warranty parts
are provided through
Hitachi Customer Service.
All Servicers should call
800-654-7013
Be sure to read this manual before servicing. To assure safety from re, electric shock, injury harmful radiation and
materials, various measures are provided in this Hitachi LCD TV.
Be sure to read the cautionary items described in the manual to maintain safety before servicing.
1. Do not attempt to modify this product in any way and never perform customized installations without manufacturer's
approval. Unauthorized modi
resulting property damage or user injury.
2.
Service work should be performed only after you are thoroughly familiar with all of the following safety checks and
servicing guidelines. To do otherwise, increase the risk of potential hazards and injury to the user.
While servicing, use an isolation transformer for protection from A.C. line shock.
3.
*
SAFETY NOTICE .................................................. 2-4
PRODUCT SPECIFICATIONS ................................ 5
*
FUNCTIONAL OVERVIEW ................................. 6-7
*
CONNECTIONS ................................................. 8-10
*
ADJUSTMENTS ............................................... 11-13
*
*
WIRING DIAGRAM ......................................... 14-15
PCB DIAGRAM ............................................... 16-18
*
BLOCK DIAGRAM .......................................... 19-20
*
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
November 2008
Caution
Service warning
ions will not only void the warranty , but may lead to your being liable for any
Contents
LCD Television
Digital Media Systems Group, Hitachi Asia Ltd.
L32A102
L32A102G
SCHEMATIC DIAGRAMS ............................... 21-31
*
*
DC VOLTAGES ...................................................... 32
WAVEFORMS .................................................. 33-35
*
TROUBLESHOOTING ..................................... 36-42
*
QUICK DISASSEMBLY GUIDE ....................... 43-45
*
REPLACEMENT PART LIST ............................ 46-63
*
MAIN PARTS VIEW ............................................... 64
*
0031E
Rev 070809or

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  • Page 1: Table Of Contents

    Be sure to read this manual before servicing. To assure safety from re, electric shock, injury harmful radiation and materials, various measures are provided in this Hitachi LCD TV. Be sure to read the cautionary items described in the manual to maintain safety before servicing.

  • Page 2: Safety Notice

    SAFETY NOTICE PRODUCT SAFETY SERVICING GUIDELINES FOR VIDEO PRODUCTS...
  • Page 3 Important Safety Instructions Read Instructions - All the safety and operating appliance dealer or local power company. instructions should be read before the product Power Cord Protection - Power cords should be is operated. routed so that they are not likely to be walked Retain Instructions - The safety and operating on or pinched by items placed upon or against instructions should be retained for future...
  • Page 4 adjustment of other controls may result in Installation Location - Place the product on a damage and will often require extensive rm and at surface. Avoid placing the product work by a service technician to restore the in areas of direct sunlight, heating radiators, product to its normal operation.

  • Page 5: Product Specifications

    L32A102 & L32A102G Panel Size 31.51 inches Resolution 1366×768 Power Requirement AC 120V, 60 Hz Power Consumption 115W, 1A (L32A102 ) 180W, 1.6A (L32A102G ) Audio Output 7W + 7W Dimension With Stand 31.3×22.7×11 inch (795×576×280mm) (W×H×D) Without Stand 31.3×21×3.3 inch (795×533×85mm)

  • Page 6: Functional Overview

    FUNCTIONAL OVERVIEW Front Panel Remote control sensor Receives signal from the remote control. Power indicator Lights up in red when the TV is in standby mode. Lights up in blue when the TV is turned on. Side Panel Head Phone jack Connect to head phones.
  • Page 7 Remote Control Dash ( ) Press to view digital sub channels. First enter the main channel number, then press this button, then enter the sub-channel number. Menu INFO Press to enter or exit from the TV menu. Picture Mode Press to select the desired picture mode. Sound Mode Press to select the desired sound mode.

  • Page 8: Connections

    CONNECTIONS Setting up your TV Connecting a standard video device Connecting an antenna, cable TV, or Note Your TV supports multiple video source inputs. For satellite TV temporary or easy-access video connections, use the side jacks (AV2). For more permanent connections, use the rear jacks (AV1).
  • Page 9 To connect a standard S-Video device to AV1 To connect a progressive-scan or HDTV jacks: video source to Y/Pb/Pr jacks: 1 Plug a component video cable (2) into the 1 Plug an S-Video cable (3) into the S-Video progressive-scan or HDTV video device (3) out jack on an S-Video device (5) and into the S-VIDEO jack (1) on the back of your TV.
  • Page 10 Connecting a computer HDMI1 VIDEO COAXIAL AUDIO AUDIO S-VIDEO AUDIO OUTPUT HDMI1 To connect a computer using VGA: 1 Plug a VGA cable (4) into the VGA port on the computer (6) and into the RGB INPUT port on the back of your TV. 2 Plug an audio cable (5) into the audio jack on the computer (6) and into the AUDIO RGB INPUT port on the back of your TV.

  • Page 11: Adjustments

    ADJUSTMENTS 1. S/W Check The software version of the L32A102/G LCD TV can be Factory Menu Video Quality checked through the Factory Menu by following the next ADC Setting procedure: ColorTemp Setting Other Setting Press following buttons in secuence About...
  • Page 12 3. FACTORY SHIPPING CONDITIONS Video HDMI AV1/AV2 S-Video Picture Mode Dynamic Contrast Brightness Color Sharpness Tint Color Temperature Cool Cool Cool Cool Warm Cool Aspect 16:9 Noise reduction Medium Advanced (RGB H-Pos only) V-Pos Clock Phase Auto Audio Sound Mode Standard Bass Treble...
  • Page 13 3. FACTORY SHIPPING CONDITIONS (CONT.) Locks Enter Password Change Password Enter Old Password Enter New Password Confirm Password System Lock Input Block Unblock HDMI Unblock AV(Video) Unblock Unblock Unblock AV(S-Video) Unblock TV Rating Movie Rating Canada Canadian Ratings(Eng) Canadian Ratings(Frn) RRT Setting Reset RRT Are you sure? No /Yes...

  • Page 14: Wiring Diagram

    WIRING DIAGRAM...

  • Page 16: Pcb Diagram

    PCB DIAGRAMS FUNCTION BUTTON BOARD DIAGRAM RMC BOARD DIAGRAM AV BOARD DIAGRAM...
  • Page 17 MAIN BOARD DIAGRAM (TOP)
  • Page 18 MAIN BOARD DIAGRAM (BOTTOM)

  • Page 19: Block Diagram

    BLOCK DIAGRAM SCALER/LVDS/ADC/JACK/ AV SWITCH/STEREO/ SOUND AMP BLOCK DIAGRAM...
  • Page 20 POWER BLOCK DIAGRAM P O W E R S U P P LY LCD PANEL R120 TV TUNER U38 +5V BA05 +12V AMP U31 7266 +3.3V AM1117 MCU U34 9S08 U1 4052 +5V PANEL LVDS A04801 TV IF U38 U1 4052 -5V TPS60400 U4&U6 4580 -5V U6 4580 +5V...

  • Page 21: Schematic Diagrams

    SCHEMATIC DIAGRAMS MSD119CL CIRCUIT DIAGRAM...
  • Page 22 SYS POWER CIRCUIT DIAGRAM...
  • Page 23 MCU & RTC EXTRA CIRCUIT DIAGRAM...
  • Page 24 TFT CON CIRCUIT DIAGRAM...
  • Page 25 DEMOD CIRCUIT DIAGRAM...
  • Page 26 AUDIO CIRCUIT DIAGRAM 23 E...
  • Page 27 AV INPUT & OUTPUT CIRCUIT DIAGRAM...
  • Page 28 HD & VGA CIRCUIT DIAGRAM...
  • Page 29 HDMI CIRCUIT DIAGRAM...
  • Page 30 TUNER CIRCUIT DIAGRAM...
  • Page 31 HD AUDIO SWITCH CIRCUIT DIAGRAM...

  • Page 32: Dc Voltages

    DC VOLTAGES Symbol CON4 5.1 5.1 5.1 3 (Power-Main) CON5 (Power-Panel) CON4 (Main-AV) CON5 (Main-AV) CON14 (Speakers) XP3 (Main- 2.4 3.3 0 3.2 3.3 - RMC/Control) 1.7 0 3.3 0 3.2 3.3 - Symbol CON9 3.2 3 (Main-AV) Symbol CON9 3.0 0 3.2 0 (Main-AV)

  • Page 33: Waveforms

    WAVEFORMS The waveforms were taken with a color bar video signal and for the audio a 1Vp-p 1kHz audio signal was used. power signal Control signal lvDs signal Bl aDJ (Con4 pin 3) Bl on/off (Con4 pin 4) (Con3 pin 9) sviDeo 1,2 CHroma sviDeo 1,2 luminanCe viDeo 1,2 signal...
  • Page 34 HDmi signal vga r signal vga g signal (u22 pin 1~16) (pin 1-D36) (pin 2-D35) vga B signal vga vs signal vga Hs signal (pin 3-D34) (pin 13-D37) (pin 14-D38) vga r signal vga g signal vga B signal (u22 pin 24) (u22 pin 23) (u22 pin 21)
  • Page 35 lvDs signal lvDs signal H18 auDio signal r (u22 pin 150~159) (u22 pin 137~146) (pin 2,4,13,15) auDio signal r, l pC/HDmi auDio signal r auDio signal r, l (u22 pin 55,56,59,60) (u22 pin 57,58,61,62) (u4 pin 1,7) auDio signal r, l (u31 pin 1,2,14,15)

  • Page 36: Troubleshooting

    TROUBLESHOOTING SYMPTOM: NO WORK/LED IS OFF ABNORMAL No work / LED is off Check if power Replace power connection connection is normal Check if voltage of Replace Power PCB Power PCB CON4 is normal* Replace fuse and eliminate short Check if fuse is normal or open situation Check if voltage of XP3 Replace Main PCB...
  • Page 37 SYMPTOM: NO WORK/LED IS RED ABNORMAL No work / LED is red Check if RMC Replace RMC PCB PCB is normal Check if voltage of U2, Replace U2,U25,U29,U49 U25,U29,U49 is normal* * See below diagrams Replace Main PCB +3.3 V +5 V +5 V +3.3 V...
  • Page 38 SYMPTOM: NO PICTURE/LED IS BLUE ABNORMAL No Picture / LED is blue Check the power and Check if voltage of power Check if backlight is normal control signal of CON1 Replace Main PCB PCB CON5 is normal* in main PCB is normal** Replace LCD panel Check if connector Replace CON3...
  • Page 39 SYMPTOM: NO CVBS/SVIDEO ABNORMAL No CVBS/SVIDEO Picture Check if SVIDEO/CVBS Replace connect wire signal of U22 pin36,37, 42,40 is normal** Replace Main PCB SYMPTOM: NO HDMI ABNORMAL No HDMI Check if signal of Replace connection P4 is normal** Check if voltage of Replace U12 U12 pin 8 is 4.75V Check if HDMI signal of...
  • Page 40 SYMPTOM: NO VGA PICTURE ABNORMAL No VGA picture Check if signal of P2 pin Replace connection 1,2,3,12,13,15 is normal** Check if voltage of Replace U8 U8 pin 8 is +5V Check if signal of U22 pin Replace Main PCB 16,17,21,23,24 is normal** Check if signal of U22 Replace U22 LVDS is normal**...
  • Page 41 SYMPTOM: NO AV1/AV3 AUDIO ABNORMAL No AV1/AV3 audio Check if signal of H18 Replace connection pin 2,4,13,15 is normal** Check if signal of U22 Replace U22 pin 55,56,59,60 is normal** Check if signal of Replace U6 U6 pin 1,7 is normal** Check if signal of U31 Replace U31 pin 1,2,14,15 is normal**...
  • Page 42 SYMPTOM: NO PC/HDMI AUDIO ABNORMAL No PC/HDMI audio Check if signal of U22 Replace U22 pin 57,58,61,61 is normal** Check if signal of Replace U6 U6 pin 1,7 is normal** Check if signal of U31 Replace U31 pin 1,2,14,15 is normal** Replace Speaker * Refer to DC voltages page ** Refer to Waveforms page...

  • Page 43: Quick Disassembly Guide

    QUICK DISASSEMBLY GUIDE STAND BASE AND BACK COVER...
  • Page 44 QUICK DISASSEMBLE GUIDE POWER BOARD AND MAIN BOARD...
  • Page 45 QUICK DISASSEMBLE GUIDE SIDE TERMINAL AND SUPPORT METAL...

  • Page 46: Replacement Part List

    MLT788 POWER ASS'Y YZES7898 L32A102/L32A102G FUNCTION BUTTON ASS'Y MISCELLANEOUS YZEA60284 T315XW02 VQ LCD TFT (FOR L32A102) YZEA60286 T315XW02 VL LCD TFT (FOR L32A102G) YZES06460 CLE-1001 REMOTE CONTROL Note: For a faster reference, please check MAIN PARTS VIEW on page 64.
  • Page 47 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. L32A102/L32A102G YZEA60284 T315XW02 VQ LCD TFT (L32A102) YZES06460 CLE-1001 REMOTE CONTROL YZES15319fss L32A102(HITACHI) OWNER MANUAL...
  • Page 48 CROSS REFERENCE FOR COMPONENTS PART NUMBERS The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. CAPACITORS ECJMFF1C106Z ECJ TYPE: (Example) Product Code Packaging...
  • Page 49 CROSS REFERENCE FOR COMPONENTS PART NUMBERS The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. CAPACITORS GRM39F104Z25PT GRM TYPE: (Example) Product Type Code Capacitance...
  • Page 50 CROSS REFERENCE FOR COMPONENTS PART NUMBERS The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. CAPACITORS VES-16V101MF55-R VES TYPE: (Example) Series Name Rated Voltage Code...
  • Page 51 CROSS REFERENCE FOR COMPONENTS PART NUMBERS The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. RESISTORS RCML08W330JT RCML TYPE: (Example) Product Code Type...
  • Page 52 YZEA6984 AV-8.4-03 JACK YZEP20015 GRM39F104Z25PT YZEA7667 CK35-14 HEADPHONE JACK YZEP20085 GRM40Y5V225Z16 YZEP90159f IS24C02B－2GL1 C449 YZEP20101a GRM21BF51C106ZE15L YZEP91051 PS121 CON1 YZEA6515 B-10B-PH L32A102 MAIN ASS'Y CON2 YZEA60180a PHD2X10A YZEP20015 GRM39F104Z25PT CON4 YZEA6510 B-5B-PH YZEP20015 GRM39F104Z25PT YZEP5819 BAV99DW-7-F YZEP20015 GRM39F104Z25PT YZEP5819 BAV99DW-7-F...
  • Page 53 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME YZEP20029 GRM39CH331J50PT YZEP20014 GRM39B473K16PT...
  • Page 54 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME C147 YZEP20006 GRM39CH101J50PT...
  • Page 55 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME C246 YZEP20015 GRM39F104Z25PT...
  • Page 56 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME C336 YZEP20015 GRM39F104Z25PT...
  • Page 57 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME CA27 YZEP30027a 6.3V/47UF...
  • Page 58 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME YZEA60150 DTV1931DAM3 AV JACK YZEA60151...
  • Page 59 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME YZEP11013 RC-03K103JT YZEP11014 RC-03K123JT...
  • Page 60 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME R119 YZEP11013 RC-03K103JT...
  • Page 61 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME R265 YZEP11013 RC-03K103JT...
  • Page 62 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME R372 YZEP11116 RC-03K470JT...
  • Page 63 The components shown in the remaining pages served as a reference only. It is not meant for ordering of components for servicing purposes. Do not quote any components from these lists. REF No. PART No. PART NAME REF No. PART No. PART NAME RP17 YZEP11206 RCML08W220JT...

  • Page 64: Main Parts View

    LCD PANEL POWER PWB ASS’Y MAIN PWB ASS’Y P# YZEA60284 (L32A102) P# YZES7889 P# YZE23509 P# YZEA60286 (L32A102G) RMC PWB ASS’Y FUNCTION BUTTON ASS’Y AV SIDE PWB ASS’Y P# YZE23223 P# YZES7898 P# YZE23151 Remote Control P# YZES06460 Speakers ( L & R) P# YZES5189...
  • Page 65 L32A102/L32A102G SC No. 0031E Copyright Digital Media Systems Group, (2008) All rights reserved...

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