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Hitachi 42HDM12 Service Manual
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Hitachi 42HDM12 Service Manual

Hitachi 42HDM12 Service Manual

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HITACHI
SERVICE MANUAL
Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful
radiation and materials, various measures are provided in this Plasma Monitor.
Be sure to read cautionary items described in the manual before servicing.
These servicing instructions are for use by qualified service personnel only. To reduce the risk of electric
shock, do not perform any servicing other than that described in the operating instructions unless you are
qualified to do so.
1. Since the Panel Module and the front Filter are made of glass, handling the broken Module and Filter
carefully and with caution in order not to receive injury.
2. Replacement work should be started after the Panel Module and the AC/DC Power supply have
become sufficiently cool.
3. Special care should be taken when working near the display area in order not to damage its surface.
4. The Panel Module should not be touched with bare hands in order to protect its surface from
blemishes and damage.
5. It is recommended that you use clean soft gloves during the replacement work in order to protect not
only the display area of the Panel Module but also yourself.
1. Features -------------------------------------------3
2. Specifications ------------------------------------4
3. Component Names -----------------------------5
4. Service points ------------------------------------7
5. Adjustment ----------------------------------------8
6. Troubleshooting --------------------------------11
Updated 3/24/06
7. Block diagram ---------------------------------- 22
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Ver TA 002.3
No.
Caution
Service Warning
Contents
8. Connection diagram ---------------------------- 24
9. Wiring diagram ----------------------------------- 25
10. Basic block diagram --------------------------- 26
12. Disassembly diagram ------------------------- 34
13. Replacement parts list ------------------------ 36

Plasma Monitor

1
TA 002
42HDM12
Updated 1/10/07
Updated 1/3/07

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  • Page 1: Table Of Contents

    TA 002 HITACHI 42HDM12 SERVICE MANUAL Caution Be sure to read this manual before servicing. To ensure safety from fire, electric shock, injury, harmful radiation and materials, various measures are provided in this Plasma Monitor. Be sure to read cautionary items described in the manual before servicing.
  • Page 2 CAUTION FOR SAFETY Please read this page before repair the monitor. The following safety precautions are designed to help you stay safe and prevent accidents during the repair work. Please take note of these cautionary flags. This means "Potential to sustain injury or even death." Warning This means "Potential to sustain breakage or irreparable damage."...

  • Page 3: Features

    PRECAUTIONS Cleaning the monitor's plasma screen panel Before cleaning the monitor, turn it off and disconnect the power plug from the power outlet. To prevent scratching or damaging of the plasma screen face, do not knock or rub the surface with sharp or hard objects. Clean the screen with a soft cloth moistened with warm water and dry with a second soft cloth.

  • Page 4: Specifications

    2. Specifications Display Approx. 42inches (922 (H) x 522 (V) mm, diagonal 1059mm) dimensions Panel Resolution 1024 (H) x 1024 (V) pixels 1036 (W) x 775 (H) x 330 (D) mm (With stand)；1036 (W) x 713 (H) x 93 (D) mm (Without stand) Net dimensions 42.5 kg (With stand)；35 kg (Without stand) Net weight...

  • Page 5: Component Names

    3. Component names Main unit Control panel Al Adjustment buttons are located on the bottom of the control panel Indications for each button's function can be found on the inside of the control panel cover. 1. POWER 5. VOL 2. UP 5.
  • Page 6 Remote Control 1. Power Button 2. Recall Button 3. Quick Button 4. P. Mode Button 5. PC ADJ. Button 6. Menu Button 7. Exit Button 8. SEL Button 9. Up/Down/Left/Right Buttons 10. RTN Button 11. Video Button 12. PC Button 13.

  • Page 7: Service Points

    4. Service points Lead-free solder This product uses lead-free solder (unleaded) to help protect the environment. Please read these instructions before attempting any soldering work. Caution: Always wear safety glasses to prevent fumes or molten solder from getting into the eyes. Lead-free solder can splatter at high temperatures (600℃). Lead-free solder indicator Printed circuit boards using lead-free solder are engraved with an "F."...

  • Page 8: Adjustment

    5. Adjustment & Software Update This model has a factory mode, where the technician can access and adjust some of the color temperature settings. The factory mode has several different appearances, depending on the input signal. Preliminary To access the Factory Mode, the Plasma Monitor must be running.
  • Page 9 Page intentionally left blank...
  • Page 10 Page intentionally left blank...

  • Page 11: Troubleshooting

    6. Troubleshooting The flow chart shown below will help you to troubleshoot your Monitor set with it doesn’t display normally. Each procedure offers a simple way to check for system errors. Before starting, ensure that there is a signal in and that the Monitor is turned on.
  • Page 12 No sound issue Picture is diaplayed. But no sound Take off the back cover and check ifl wires of the speakers terminals have been well Check connected to the PCB-Main and speakers ? No sound Are the voltages applied to CN2①②...
  • Page 13 No picture issue Picture is not diaplayed (LED is lighting) Is the LED red or green ? Green Is voltage applied to CN11 ⑩(st-5v) ? Is it the power saving mode ? PCB-Main Power supply unit Input signal cables or PCB-Main Is the voltages of CN10/CN11 on the...
  • Page 14 Remote Control doesn’t work Remote controller doesn’t work. Replace the Remote Try if another Remote Controller works? Controller. Put new batteries to Check if batteries are the remote control placed correctly? Test again Take off the back cover. Check if the wire of PCB-IR Connect the wire has been well connected to properly.
  • Page 15 Key pad doesn’t work Key pad doesn’t work. Take off the back cover and check if Connect the wire of PCB-Speaker connectoer the wire has been well connected to the properly PCB-Key Pad and PCB-Main? Test again Change PCB-Key Pad and connect all wires properly.
  • Page 16 No PC signal (Analog RGB) No PC signal. Check if PC source is Check PC by PC working on other Service Provider display? Connect the D-Sub Check if the D-Sub cables cables properly have been well connected to the PDP? Test again Check if the signal...
  • Page 17 No signal issue (Composite, SV, YCbCr, YPbPr) No signal Enable source and Check if the signal source connect the signal wire is available and been well properly. connected? Check if the PCB-I/O has Connect the PCB-I/O been well connected to properly.
  • Page 18 No HDMI signal issue No signal Enable source and Check if the signal source connect the signal wire is available and been well properly. connected? Take off the back cover. Check if the PCB-HDMI Connect the has been well connected PCB-HDMI properly.
  • Page 19 Software can’t be updated Can not update software Check if RS-232 Cable Connect RS-232 has been well connected Cable properly. to the PDP? Take off the back cover. Test again Check if all wires have Connect the wires been well connected to the properly.
  • Page 20 Power board issues 1. No power NO POWER NO Vs, Va, Vcc, STB impedance check FUSE D001 D001 impedance check Q003/Q004 Over 130V Q003/Q004/R005 ect check voltage D020(k)-J051 impedance check Q201 Under 130V Q200/Q201/Q202/D210 D151, D101 etc See NO PICTURE & impedance check SOUND Q301...
  • Page 21 3. No picture NO PICTURE NO Vs, Va, Vcc impedance check Vs LINE Open connector CN64 impedance check Va LINE impedance check Vs LINE Open connector SW ON CN64 impedance D551, D550 Va:no uprise Vs:no uprise check Va LINE Vs:down after up Va:down after up Q303, PC301, Q501,D510,...

  • Page 22: Block Diagram

    7. Block Diagram Plasma Monitor...
  • Page 23 Power Module...

  • Page 24: Connection Diagram

    8. Connection Diagram...

  • Page 25: Wiring Diagram

    9. Wiring Block Diagram Item Wire Part No. HITACHI Part No. Item Wire Part No. HITACHI Part No. Item Board Part No. HITACHI Part No. P205 Wire Ass’y W10/10P E057410010 TE02294 P207 FFC 50P+AI E784650506 TE02751 Main Board(PWB-0891) 5097652002 TS06661 P203 Wire Ass’y W11/10P...
  • Page 26 Panel Boards Layout X-SUS PWB Y-SUS PWB LOGIC PWB located behind Main Board A-BUS-R PWB A-BUS-L PWB See page 41 for p/n's CH 3...

  • Page 27: Basic Block Diagram

    10. Basic Block Diagram MAIN PWB...

  • Page 28: Printed Wiring Board Diagram

    11. Printed Wiring Board Diagram Main Board－Top Side...
  • Page 29 Main Board－Bottom Side...
  • Page 30 I/O Board－Top Side ● RS-232 Board－Top Side Audio Board－Top Side...
  • Page 31 Audio Transfer Board－Top Side(L)/Bottom Side(R)
  • Page 32 Power/EMI Board－Top Side(L)/Bottom Side(R) Speaker Connector Board－Top Side(L)/Bottom Side(R) Key Pad－Top Side(L)/Bottom Side(R) IR Board－Top Side(L)/Bottom Side(R)
  • Page 33 HDMI Board－Top Side(L)/Bottom Side(R)
  • Page 34 Power Board...

  • Page 35: Disassembly Diagram

    12. Disassembly Diagram Mechanical...
  • Page 36 Packing...

  • Page 37: Replacement Parts List

    13. Replacement Parts List See updated parts list Mechanical & Packing part list NO. DESCRIPTION PART NO. HITACHI PART NO. QT`Y Front Cover Ass'y 5095254735 TS06631 Function Key E642851202 TS05941 Rear Cover Ass'y 5095754735 TS06641 SPK Cover E641105000 TJ03611 Stand Ass'y...
  • Page 38 Shipping Label E030409339 TJ03605 Grip Joint I534100356 TJ04071 Clip PE Bag I533251157 TJ03606 Lead Disposal E030539003 TS06177 EPS Bottom(BM) I524100356 TJ05221 Main Power SW Attention Sheet E030039011 TJ05231 See updated parts list CH 2...
  • Page 39 See updated parts list Electrical part list DESCRIPTION PART NO. HITACHI PART NO. QT`Y ASSEMBLY PCB-MAIN BOARD (PWB-0891) 5097652002 TS06661 ASSEMBLY PCB-I/O (PWB-0899) 5097651805 TS06662 ASSEMBLY PCB-KEY PAD (PWB-0876) 5097651413 TS06663 ASSEMBLY PCB-IR (PWB-0876) 5097651412 TS06664 ASSEMBLY PCB-RS-232 BOARD 5097643008...
  • Page 40 T811 EMI FILTER SOCKET TYPE DIT E061133007 TE03191 T811A HEATED SHRINK TUBE E075500001 TE02331 0.02M PL01 PANEL MODULE (FPF42C128128UD-55) 5051253815 DD00671 5053911086 TS05771 PWB ASS’Y LOGIC A2 (FPF28R-LGC0045) 5053911087 TS05772 PWB ASS’Y X-SUS A2 (FPF28R-XSS0026) 5053911088 TS05773 PWB ASS’Y Y-SUS A2 (FPF28R-YSS0027) 5053911089 TS05774 PWB ASS’Y ABUS-L A2 (FPF28R-ABL0019)
  • Page 41 42HDM12 Part Number Description FPF28R-ABL0019 ABUS-L BOARD FPF28R-ABR0020 ABUS-R BOARD FPF28R-LGC00450 LOGIC BOARD FPF28R-XSS0026 X SUS BOARD FPF28R-YSS0027 Y SUS BOARD FPF42C128128UD5 42" PANEL 5095254735 FRONT BEZEL 5095670853 ASSEMBLY PCB-AUDIO & POWER 5095854682 STAND BASE COVER 5095854735 STAND ASSY 5097643008...

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