Troubleshooting - Samsung SPT51A Service Manual

6. Troubleshooting

6-1 No Power
Abnormal
Check C801
Check/Replace
D808 & R801
Samsung Electronics
Abnormal 0V
Check CN801 Pin 2
Normal
Check/Replace
HC801
Normal 0V
Check the base voltage
Check/Replace
Q851 and Q852.
+
(STB B ).
3V
Normal
Check F851.
Abnormal 0.6V
on Q852
Check/Replace
Q854.
Check IC901
Peripheral Circuits
Normal 12V
Check the voltage
on CN801 Pin 1
Abnormal
Check/Replace
Q401 and Q402
Replace F854
Normal
Troubleshooting
0V
Check IC901
(VCC)
Abnormal
Replace IC901
6-1