1
6
Short circuit the pin 8 (PS-ON)
of X709 to the ground, then
check power.
9.
Diagram of Normal Trouble Shooting
1
.
“Three no”, i.e., no raster, no picture and not sound:
If power indication lamp is lit
yes no
normal
normal abnormal normal abnormal
JI
Normal abnormal
normal
Note:Power supply for PDP is provided with over current and over voltage protection functions.
If there is over current or over voltage, this protection will function and no output.
Three no
check5V-STBY
Cutoff the connection
between power board
and signal process,
check5V-STB
Cutoff the connection
x2 between main board
and video process.
Board,then determine
which board is
abnormal
Power board
problem
Check power
esp. D3.3V
N501abno
rmal
Check supply,
crystal oscillation
for N501andN601
Pull out
X709 check
Check N501and
N601
Check supply for
N102,N204,N302,N403,crystal
oscillation and bus line
Short
circuit in
Power board
Summary of Contents for PS42K8
Page 1: ...COLOR TELEVISION PS42K8...
Page 11: ...10 4 IC BLOCK 1 MSP3420...
Page 12: ...11 2 VPC3230...
Page 13: ...12 3 JAG ASM...
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