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LC-32L407I
CHAPTER 6.
TROUBLESHOOTING TABLE
LC-32L400M
[1] TROUBLESHOOTING TABLE
No power (front LED failure to light up) or no startup (front LED failure to turn from red to green)
Is the AC cord connector tightly connected to the set?
Is the output voltage at pin (7), (8), (9) and (10) of P5201 (13.0V
line) as specified?
Are the wire harnesses and other cables properly connected in
the set?
Is there the AC_DET and PNL_ON signal input at pins (14) and
(1) of P5201?
Are the DC/DC converter outputs and the output voltages along
the control lines as specified?
1) B1.26V (IC9606)
2) D2.6V (IC9603)
3) STB+3.3V (IC9602)
4) D3.3V (IC9653)
5) B5V (IC9652)
YES
YES
YES
YES
Service Manual
NO
Reconnect the AC cord tightly and turn on the power again.
NO
Replace the power unit.
NO
Reconnect the wire harnesses and other cables properly in the
set.
NO
Check the AC_DET signal line PNL_ON signal line.
NO
Check the DC/DC converters and the control lines. Replace
defective parts as required.
6 – 1
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