Panasonic TH 37PX50U - Technical Guide Manual

85 pages

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Technical Guide

Plasma Training Course

TH-37PX50U, TH-42PD50U, TH-42PX50U,

TH-42PX500U, TH-50PX50U, TH-50PX500U

GP8DU and GPH8DU Chassis

Troubleshooting

Panasonic Services Company

National Training

Main Page

Default Chapter3
- Table of Contents3
Objective6
Specifications (Models Comparison)7
Safety Precautions8
TH-42PD50U Board Description and Part Numbers9
TH-42PX500U Board Description and Part Numbers10
TH-50PX500 Board Description and Part Numbers11
- Power Supply Outline for 42"And 50" Models12
Power Supply Outline for 42”And 50” Models13
- Standby Circuit13
- Power on Operation17
Power Supply Connections20
- P Board20
- PA Board21
- PB Board22
TH-42PX500U Block Diagram23
TH-42PX50U Block Diagram26
TH-42PD50U Block Diagram28
Video Input Selection Block Diagram30
Audio Input Selection Block Diagram31
ATSC, SD and PC Card Input Signal Flow32
DG Board Block Diagram33
Signal Process Circuit35
- Main Picture Signal Flow35
- Sub Picture Signal Flow35
- RGB Processor36
D Board Block Diagram37
C1 Board Block Diagram38
SC Board Explanation39
- SC Board Waveform40
  - SU and SD Board Shift Registers40
SS Board Explanation42
- SS Board Schematic43
- SS Board Waveform43
Th-42/50Px500U45
Power LED Flashing Timing Chart45
SOS Detection Circuits46
- SOS Detect (D Board)46
- SOS Detect (DG Board)46
- SOS Detect (D and PA Board)47
PA Board SOS Detection Circuits48
- Over-Voltage Detection of Main Voltage (10 Blinks)48
- Short Circuit Detection of Main Voltage (10 Blinks)49
- Short Circuit Detection of Sub-Voltage (10 Blinks)50
Other SOS Detection Circuits51
- SOS Detect (P, SC, and SS Board)51
- P Board SOS Detection52
Voltage Distribution of the PA Board and SOS Detection53
Z Board (Sound) SOS Detection55
TH-42/50PX500U Self-Check Function (Reset)56
- Diagnostic Procedures56
- How to Access the Self-Check Screen (Reset)56
- How to Exit the Self-Check Screen56
- Screen Display56
Th-42Pd50U58
Power LED Flashing Timing Chart58
TH-42/50PD50U Self-Check Function59
- Diagnostic Procedures59
- How to Access the Self-Check Screen (Reset)59
- How to Exit the Self-Check Screen59
- Screen Display59
Serviceman Mode61
- How to Enter the Serviceman Mode61
- Adjustment Method61
- Cancellation61
- Contents of Adjustment Mode61
- Internal Pattern Generator62
Cable Diagnostic Screen62
Adjustments63
- Driver Set-Up63
- Initialization Pulse Adjustment64
- Drive Waveform64
P.C.B. (Printed Circuit Board) Exchange Procedure65
Adjustment Volume Locations66
Test Point Locations67
Troubleshooting68
- No Picture or Partial Picture68
- Scan and Sustain Drive Waveform71
- Scan and Sustain Drive Check Points71
- Vertical Line Problems76
- Picture Ok, Sound NG77
- No Picture, no Sound78
- No Picture, Sound Ok79
- How to Determine Whether the D Board or SC Board Is Defective80
- Additional Troubleshooting Hints81
- SC20 or D20 Connector82
  - How to Determine Whether the D Board or SS Board Is Defective83
- Defective Board84
Glossary and Acronyms85

Panasonic TH 37PX50U - Technical Guide Manual

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