Panasonic Generation Plasma Display Television Quick start guide

Panasonic Service and Technology Company
National Training
10th Generation Plasma Display Television
Technical Guide

Panasonic Service and Technology Company
Prepared by
Cesar Perdomo and Jean Magloire
Panasonic Service and Technology Company
National Training
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.
Copyright © 2007 by Panasonic Services Company
All rights reserved. Unauthorized copying and distribution is a violation of law.

Table of Contents
Subject Page # Subject Page #
2007 Panasonic Plasma Line-up 5Troubleshooting (No Power/Dead Unit) Part 2 56
Models Comparison 6SOS Circuit Overview 59
High Resolution (FULL-HD Panel) 9DRV_RST SOS 62
TH-42PX75U Board Layout & Description 13 Location of Q9302 63
TH-42PX75U Board Layout (Pictorial) 14 Close-up View of Q9302 64
2006/2007 Signal Process/Switching Circuit 15 5 Blinks SOS (1) 66
Overall Block Diagram 16 SOS (Drive-reset) 68
Standby Circuit 21 D & C Boards Connection 69
STB5V/STB3.3V Distribution 25 12 Blinks SOS 70
Main CPU VCC Supply (A Board) 28 Signal Circuit Overview 75
TV_SUB_ON/TUNER_SUB_ON 30 Video Process Block Diagram 77
TV_SUB_ON (F_STB_ON) 32 D Board Block Diagram 79
TV_SUB_ON (Relay Drive Circuit) 34 Panel Drive (TH-42PX75U) 81
PFC Circuit 36 Audio Process Block Diagram 83
ACFB (Active Clamp Full Bridge Switching) Circuit 37 Self-Check Function 88
MAIN/SUB Voltages 39 How to Reset the Unit 89
F+15V, DTV9V, SUB5V SOS Detect Circuit 41 Self-Check Menu 90
Power On Operation 43 Check point 91
P15V/P5V Circuit 51 Serviceman Mode 92
Vsus/Vda Circuit 53 Serviceman Mode Menu and Navigation 93
Troubleshooting (No Power/Dead Unit) Part 1 55 Internal Test Patterns 95
3

Table of Contents (Continued)
Subject Page #
Driver Setup Adjustment 96
Initialization Pulse Adjustment 97
Quick adjustment after P.C.B. exchange 98
4

2007 Panasonic Plasma Line-up
5

Models Comparison
6

Models Comparison
7

Models Comparison
8

High Resolution (FULL-HD Panel)
About Twice the Resolution of a Standard HD PDP!
About Twice the Resolution of a Standard HD PDP!
●●
HD PDP
(approx. 1,050,000 pixels)
1366
768
Full-HD PDP
(approx. 2,070,000 pixels)
(Image resolution about twice as high)
● ●
●
●
1080
1920
*When compared to the 50PX600
●
●
The Full-HD plasma panel boasts a total of about 2,070,000 pixels (1920 x 1080).
It renders true-to-life HD images with about twice the resolution of a standard HD panel.
9

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10th Generation Plasma Television
11
Board Layout

12

TH-42PX75U Boards Layout & Description
Panasonic started using single scan addressing in the 42” HD models last year when the 9th generation
of Plasma TV was introduced. The single scan addressing was only used on standard definition models
previously. For this generation, Panasonic has added the 50” models to the list of TV using single scan
addressing. 13

TH-42PX75U Board Layout (Pictorial)
14

2006/2007 Signal Process/Switching Circuit
The 2007 42” plasma models
have less boards than the
previous generation. The PA,
DT, DG, H, and HC boards used
on the 2006 42” models are now
incorporated within the new A
board of the 2007 models.
15

Overall Block Diagram
16

Overall Block Diagram
The operation of the plasma TV can be divided into 3 different sections:
1. Power Supply Circuit
The power supply circuit board (P board) provides voltages to the Signal switching/processing circuit
and the Panel drive circuit.
2. Signal Switching/Processing Circuit
Upon connecting the unit to the AC voltage source, the STB5V of the P board is provided to the A board
for system control operation. The F_STB15V is also provided to the signal switching/processing circuit
of the A board. It remains present for approximately 25 seconds unless the power button is pressed.
This circuit also receives 15V for audio operation and fan drive for models with fan.
3. Panel Drive Circuit.
The Panel drive circuit receives the Vsus, Vda, 15V, and 5V sources from the P board when the unit is
in operation.
17

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10th Generation Plasma Television
19
Power Supply

20