4 Troubleshooting
4-2
4-2-1 No Power
4-2 Checkpoints by Error Mode
Does proper DC
A3.3V,A1.8Vappear at C126,
C156?
Check IC104, IC107 Change the
Main Ass'y
Yes
Yes
Yes
No
Check a connection a power cable.
P/N : BN39-00802A
BN39-00802B(40")
Change the Main Power Ass'y
23" : BN44-00158A
26" : BN44-00156A
32" : BN44-00156A
40" : BN44-00167A/00165A
No
Does proper DC
B9V,B3.3V_8202/B3.3VD,
B2.5V_8202 appear at
C103,C132, C145?
Check a IC809, IC802.
Change a main PCB ass'y.
Yes
No
Does proper DC 5V, 3.3V,
1.8V appear at C811, C853,
C833?
Check IC101, IC105, IC106 Change the
Main Ass'y
Yes
Does proper DC B3.3FB,
B1.2FB, B1.8VD appear at
C179_FBE, C182_FBE, C159?
Check IC110_FBE, IC111_FBE, IC109
Change the Main Ass'y
No
No
Yes
Yes
Does proper DC B3.3VD
appear at D8014?
Check IC8001
Change the Main Ass'y
No
A power is supplied to set?
Check a other function(No picture part)
Replace a LCD Panel
23" : BN07-00365A
26" : BN07-00254A
32" : BN07-00385A
40" : BN07-00387A
No
LAMP off, power indicator
LED red color?
Does proper Satand-By DC
A5V appear at C127
Does proper Main DC B12V,
B5V, B12VS appear at C104,
BD105, C119?
Does proper Inverter DC 24V
appear at CNM801 in SMPS
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