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SERVICE MANUAL
LCD
Be sure to read this manual before servicing. To assure safety from fi re, electric shock, injury, harmful radia-
tion and materials, various measures are provided in this HITACHI display.
Be sure to read cautionary items described in the manual to maintain safety before servicing.
1. Since Panel Module and front Filter are made of glass, handling the broken Module and Filter shall be
taken care suffi ciently in order not to be injured.
2. Replacing work shall be started after the Panel Module and the AC/DC Power supply become suffi ciently
cool.
3. Special care shall be taken to the display area in order not to damage its surface.
4. The Panel Module shall not be touched with bare hand to protect its surface from stains.
5. It is recommended to use clean soft gloves during the replacing work in order to protect not only the dis-
play area of the Panel Module but also a serviceman himself.
6. The Chip Tube of Panel Module (located upper left of the back and surrounded by frame) and fl exible
cables connecting Panel glasses to drive circuit PWBs are very weak, so shall be taken care suffi ciently
not to break. If you break Chip Tube, the Panel doesn't display anything forever.
1. Features --------------------------------------------------3
2. Specifi cations --------------------------------------------4
3. Service point ---------------------------------------------5
4. Component names -------------------------------------6
5. New adoption technology -----------------------------7
6. Adjustment --------------------------------------------- 11
7. Troubleshooting --------------------------------------- 37
8. Self-diagnosis function ------------------------------ 52
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT.
Caution
Service Warning
Contents
Plasma Display
November 2005 Digital Media Division
YK
55PD8800TA(PW3)
37LD8800TA(PW3L)
PDP
9. Basic circuit diagram --------------------------------- 54
10. Printed wiring board diagram ---------------------- 82
11. Block diagram ----------------------------------------- 90
12. Connection diagram --------------------------------- 91
13. Wiring diagram ---------------------------------------- 93
14. Disassembly diagram -------------------------------- 97
15. Replacement parts list ----------------------------- 101
No.022E
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Table of Contents
Related Manuals for Hitachi 37LD8800TA
Summarization of Contents
Contents
Service Warnings
Important safety precautions for handling and servicing the display panel and its components.
List of Sections
Overview of the manual's sections, covering features, specifications, service points, diagrams, and troubleshooting.
Caution for Safety
Safety Instructions and Guidelines
Detailed instructions on following procedures, preventing electric shock, using correct components, and performing post-repair checks.
1. Features
Display and Processor Features
Highlights the large-screen high-definition panel and advanced digital processor for image quality.
User Interface and Power Saving
Covers the easy-to-use OSD system, remote control, and automatic power saving features.
Audio Visual and Swivel Features
Details connectivity for AV devices and the power swivel functionality for display adjustment.
2. Specifications
Applicable Video Signals
Lists the video signals compatible with each input terminal, specifying formats and connections.
3. Service Points
Lead-Free Solder and Servicing Iron
Explains the properties of lead-free solder and specifies requirements for soldering irons for optimal performance.
4. Component Names
Main Unit Components
Labels components on the TV's main unit, including the control panel and power switch.
Remote Control Buttons
Identifies all buttons and functions on the remote control for user operation and servicing.
5. New Adoption Technology
System Control Micom Pin Functions
Lists pin names and their functions for the system control microcontroller, crucial for understanding internal operations.
6. Adjustment
Entering and Navigating Adjustment Mode
Explains how to enter the adjustment mode and use control buttons to select codes and change data values.
Memory Initialize Operation
Details the procedure to reset adjustment codes to factory preset values, cautioning about data loss.
RGB Amplitude Adjustment
PC D-Sub Input Adjustment
Steps for calibrating RGB amplitude via D-Sub input using a VGA signal and automatic adjustment.
AV1 Input Adjustment
Procedure for setting RGB amplitude for AV1 input using 576p or 480p signals and service menu adjustments.
Video Color Temperature Adjustment (Cool)
PDP Panel Color Temperature (Cool)
Specifies procedures and target values for adjusting the cool color temperature on PDP displays.
LCD Panel Color Temperature (Cool)
Outlines the steps and targets for adjusting the cool color temperature on LCD displays.
Video Color Temperature Adjustment (Normal)
PDP Panel Color Temperature (Normal)
Provides procedures and specifications for adjusting the normal color temperature on PDP displays.
LCD Panel Color Temperature (Normal)
Explains the calibration process and target values for the normal color temperature on LCD panels.
Video Color Temperature Adjustment (Warm)
PDP Panel Color Temperature (Warm)
Details the adjustment process for warm color temperature on PDP displays, specifying target values.
LCD Panel Color Temperature (Warm)
Outlines the steps for calibrating the warm color temperature on LCD panels, including target values.
Video Color Temperature Adjustment (B&W)
PDP Panel Color Temperature (B&W)
Specifies the procedure and target values for adjusting the black and white color temperature on PDP displays.
LCD Panel Color Temperature (B&W)
Details the calibration steps and target values for the B&W color temperature on LCD panels.
PC Color Temperature Adjustment
Mapping Video to PC Color Settings
Details the procedure for transferring video color temperature data to PC color temperature adjustment settings.
7. Troubleshooting
Burn-in Mode and Control Recovery
Explains how to enter burn-in mode for diagnostics and how to recover remote/front key functions.
Panel Usage Time Check and Reset
Guides on checking panel accumulation time and resetting it after LCD panel replacement.
8. Self-Diagnosis Function (PDP)
PDP Panel Self-Diagnosis
Procedure to diagnose PDP panel failures based on power indicator light blink patterns and identify probable faulty PWBs.
9. Basic Circuit Diagram
Waveform Examples
Displays example waveforms at various IC pins (I201, I501, TP65, etc.) to help diagnose signal integrity.
10. Printed Wiring Board Diagrams
Main and LED Board Diagrams (Side-A)
Shows the wiring layout for the main board, LED PDP, LED LCD, and SWIVEL boards from the component side.
Printed Wiring Board Diagrams (Side-B)
Main and LED Board Diagrams (Side-B)
Illustrates the wiring layout for the main board, LED PDP, LED LCD, and SWIVEL boards from the solder side.
Audio, Control, and SW Boards (Side-A)
Audio Board Components (Side-A)
Details chip components and their positions on the Audio board from the component side.
Control Board Components (Side-A)
Lists chip components and their positions on the Control board from the component side.
SW Board Components (Side-A)
Identifies chip components and their locations on the SW board from the component side.
Audio, Control, and SW Boards (Side-B)
Audio Board Components (Side-B)
Shows chip components and positions on the Audio board from the solder side.
Control Board Components (Side-B)
Lists chip components and their locations on the Control board from the solder side.
12. Connection Diagram
Connection Diagram 1/2
Details the first half of the cable connections within the system, illustrating inter-board wiring.
15. Replacement Parts List (55PD8800)
Part Symbol and Description
Lists components with their symbols, part numbers, and descriptions, categorized by type and location.
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