Troubleshooting For Picture Trouble - Panasonic TH-37PX60U Technical Manual

Troubleshooting for Picture Trouble

<How to determine the defective board>
Start
Where is
the symptom
displayed?
Upper or Lower half
(from front view)
Left or Right half
(from front view)
Other case
Diagnosis for Picture Problem
<Symptom>
Abnormal Color, Vertical Line, Sync Error, Noise Picture
<Sample Picture>
<Possible Cause>
DG Board, D Board, SC Board, SU Board, SD Board
<Block Diagram>
e.g. TH-42PX600
IC1103
DG
MICRO
PROCESSOR
LVDS
IC4037 IC4036
LVDS
DG
GC5
TRANS
5
MITTER
Some part of the screen
Upper half
SU Board (or D, or SC)
Lower half
SD Board (or D, or SC)
Both area
SS Board (or D)
Right half
D Board (or C1, or Panel)
Left half
D Board (or C2, or Panel)
All over the screen
Internal Generator
Pattern is Normally
Displayed?
Yes
DG Board (or D)
IC9500 IC9900
PICTURE
PLASMA AI
OUTPUT
D
LVDS
S.F. PROCESSOR
5 RECEIVER
DISCHARGE
CONTROL
*Note :Panel gas leakage
Because of a very small crack in the
panel, gas leakage will start.
In this picture, gas leakage started at
the left top corner.
Finally, gas leakage will lead to the
symptom "No picture with buzz
noise".
No
D Board (or SC)
Panel (*Note)
39
(All Over the Screen)
<Model>
All Models
SC
D
DATA
Video DATA (R)
DRIVER
Video DATA (L)
Scan Control Pulse
Sustain Control Pulse
40
SU
<Back side view>
SD
Buffer IC Buffer IC
SS