Troubleshooting - Samsung LNT3253H Service Manual

4 Troubleshooting

4-1 No Power
Panel Lamp Off, power indicator
LED red color?
Yes
Does proper Stand-By DC A5V
appear at C103L?
Yes
Does proper Main DC B18VS,
B5V, B13V appear at
C118,C133,C135?
Yes
Does proper Inverter DC
24V appear at CNM802,
CNM803 in SMPS?
Yes
Does proper DC A5V,A3.3V
appear at C106,C102?
Yes
Does proper DC
B5V_VCC, B3.3V_2, B1.2VD_UX,
B3.3V_1,B9V_SPLITTER, B8VS,
1.2V_CORE, B5V appear at
C147, C138, C105, C168, C181,
C189, C167, C175?
Yes
Does proper DC (32" : 5V,
40" : 12V) appear at C156?
Yes
A power is supplied to set?
No
Check power cable connection
P/N : BN39-00802A
No
Change the Main Power Ass'y
32" : BN44-00155A
40: : BN44-00165A
No
No
Check IC101D, IC102
No
Change the Main Ass'y
BN94-01183A
No
IC115, IC110, IC112, IC111,
IC113, IC114 Change the Main
Ass'y BN94-01183A
Change the Panel Option
No
32" : BD114L,R111L
40" : BD115L,R120L
Refer to No Picture flow char
No
Replace LCD Panel
32" : BN07-00385A
40" : BN07-00387A
4 Troubleshooting
Check
4-1