Diagnosis By Removing The D5 Connector - Panasonic TH-42PX75U Technical Manual

Diagnosis by Removing the A5 Connector
<Purpose>
Symptom such as "No picture, No OSD, Sound OK" is mainly caused by a defective A or D board. The internal
pattern generator cannot be accessed due to the loss of OSD. This method makes it possible to determine
whether the A board or the D (SC,SS) is defective.
<Model>
2007 Models ONLY
<Symptom>
No picture (Sound OK)
<Diagnosis>
Connect the TV after removing A5 Connector
Pattern
White Picture
No Picture
<Block Diagram and Explanation>
1. This white pattern is generated by IC9900 on D board.
2. When the TV is plugged in after disconnecting connector A5, it turns on automatically and a white picture is
provided to the panel drive circuit.
If the panel drive section of the unit is ok, a white picture is automatically displayed by the PDP.
A
IC1100
MICRO
PROCESSOR
IC4510
Peaks
HDMI I/F
Lite
IC8001
Defective Board
A Board (D board)
D board (SC or SS)
D
IC9500
PICTURE
OUTPUT
LVDS
LVDS
D
A5
RECEIVER
5
<Position of A5 Connector>
IC9900
PLASMA AI S.F. PROCESSOR
White Picture
30
VIDEO DATA
DATA
DRIVER
To C Board