Local Screen Failure - Panasonic TC-42P1 Service Manual

No Power
Does not turn the power LED
Red LED flashing
No Picture
RGB/Component, PC
(525p, 625p)
HG board
Display
HG board
OK
No signal
both SC & SS
D board
TPSC1 SC pulse

Local screen failure

Plasma display may have local area failure on the screen. Fig-T is the possible defecrt P .C.B. for each local area.
Check Fuse F900, F901
NG Check AC power code or power source
Check P9 Connecter PIN 1-3 voltage
OK Check P1 board
Remove P7 and P8 board
No picture
AV(NTSC, PAL, SECAM), Component(525i, 625i)
What signal?
All Input
Check OSD
Check
drive pulses
No SC pulse
on TPSC1
D or P1 board
When drive pulses are oscillated correctly,
slight hum noise can be heard from the boards.
1 Field
C2 board
D board
SU board
D board
SD board
D board
C3 board
D board
<Local screen failure chart>
- 20 -
NG Chenge F900, F901
OK Check AC power code or power source
P1 board
OK Check P7 and P8 board
NG Check +B lines
A-15, 17, 19
A-7, 9
Check
DS
input
OK
DS pack
No SS pulse
on TPSS1
SS or D board
C1 board
D board
C4 board
Panel(Vertical lines)
D board
Component
AV
No signal
HG board
SC or D board