Panasonic VIERA 50 Series - User Manual

Order NO.ITD0509055BE
Service
Hints
Plasma
Television
vie
r*
<500/50
Series>
TH-50/42PX500U
TH-50/42/37
PX50U
TH-42PD50U
Trouble Shooting
for Power
Supply
This service hint is published for technicians and engineers for repair.
And it
gives
you the
information
how to judge the defective board
of PDP.
Please file and
use
this Service Hints together with the main service
manual and other publications related
to
models.
A
WARNING
This service information is designed for experienced repair technicians only and
is
not designed for
use by the
general public.
It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service
or repair the product or products dealt with in this
service
information
by
anyone else could result in serious injury or death.
Panasonic
© 2005
Matsushita
Electronics Industries
Co..Lld. All
rights reserved. Unauthorized copying
and distribution
is a violation of law.

Panasonic VIERA 50 Series Specifications

General

Screen Size	50 inches
Smart TV	No
Display Type	Plasma
3D Capable	No
Refresh Rate	600 Hz
Contrast Ratio	5, 000, 000:1
Inputs	HDMI, Component, Composite

Summary

Service Hints Overview

Trouble Shooting for Power Supply

Guide for diagnosing and repairing power supply issues in plasma televisions.

Circuit Operation Power Supply

P Board Power Supply Outline

Overview of the power supply board's block diagram.

P Board Primary Circuit

Details of the primary side power supply circuit operation.

P Board Secondary Circuit

Details of the secondary side power supply circuit operation.

PA&PB Board Regulator Circuit

Explanation of regulator circuits on PA and PB boards.

Circuit Operation Protection Circuit

Power LED Blink Mode

Explains different power LED blinking patterns and their corresponding trouble modes.

Trouble Mode and Defective Board

Lists trouble modes and potential defective boards for LED blink errors.

How to find the defective board

Provides diagnostic steps to identify the faulty board based on LED status.

Trouble Shooting Introduction

Introduction of Power Trouble Shooting

General overview of power troubleshooting procedures and common issues.

Basic Idea of how to find the defective block

Explains the fundamental approach to diagnosing faulty circuit blocks.

Adjustment after P.C.B. exchange

Notes on necessary voltage adjustments after replacing circuit boards.

Trouble Shooting Power LED No Lit Trouble

Trouble status and Defective Block

Categorizes power LED status and identifies potential defective blocks.

How to find the defective board

Step-by-step guide to isolate the defective board for 'no lit' LED issues.

STB 5 V Power Supply

Details the STB 5V power supply circuit and its role in LED status.

Check Point Location

Identifies key test points on various boards for troubleshooting.

Trouble Shooting Power LED Blink Errors (General)

LED 2 times blink

Troubleshooting steps for a 2-time power LED blink error.

LED 3 times blink

Troubleshooting steps for a 3-time power LED blink error.

Trouble Shooting Power LED Blink Errors (4 Blinks)

LED 4 times blink < 42” SD (TH-42 PD50 U) >

Troubleshooting for 4-blink error on specific models.

Power Supply and Protection Circuit

Circuit diagram related to 4-blink error troubleshooting.

Check Point Location

Identifies test points for 4-blink error troubleshooting.

Trouble Shooting Power LED Blink Errors (5 Blinks)

LED 5 times blink < 42 SD (TH-42 PD50 U) >

Troubleshooting steps for a 5-blink error on specific models.

Power Supply and Protection Circuit

Circuit diagram related to 5-blink error troubleshooting.

Check Point Location

Identifies test points for 5-blink error troubleshooting.

Trouble Shooting Power LED Blink Errors (6 Blinks)

LED 6 times blink <TH-42 PD50 U, 37 PX50 U, 42 PX50 U, 42 PX500 U >

Troubleshooting steps for a 6-blink error on specific models.

Power Supply and Protection Circuit

Circuit diagram for 6-blink error troubleshooting.

Check Point Location

Identifies test points for 6-blink error troubleshooting.

Trouble Shooting Power LED Blink Errors (7 Blinks)

LED 7 times blink <TH-42 PD50 U, 37 PX50 U, 42 PX50 U, 42 PX500 U>

Troubleshooting steps for a 7-blink error on specific models.

Power Supply and Protection Circuit

Circuit diagram for 7-blink error troubleshooting.

Check Point Location

Identifies test points for 7-blink error troubleshooting.

Trouble Shooting Power LED Blink Errors (8 Blinks)

LED 8 times blink

Troubleshooting steps for an 8-blink power LED error.

Power Supply and Protection Circuit

Circuit diagram for 8-blink error troubleshooting.

Check Point Location

Identifies test points for 8-blink error troubleshooting.

Trouble Shooting Power LED Blink Errors (10 Blinks)

LED 10 times blink <TH-42 PD50 U, 37 PX50 U, 42 PX50 U, 50 PX50 U>

Troubleshooting for 10-blink error on specific models.

Power Supply and Protection Circuit

Circuit diagram for 10-blink error troubleshooting.

Check Point Location

Identifies test points for 10-blink error troubleshooting.

Trouble Shooting Power LED Blink Errors (11 & 12 Blinks)

LED 11 times blink

Troubleshooting steps for an 11-blink power LED error.

LED 12 times blink

Troubleshooting steps for a 12-blink power LED error.

Power Supply and Protection Circuit

Circuit diagram for 11/12-blink error troubleshooting.

Check Point Location

Identifies test points for 11/12-blink error troubleshooting.