Daewoo DM-K40 - 3.2. Disc Read Troubleshooting

Daewoo DM-K40 Service Manual
Page 28
3. Servicing Procedures
3.1. Power Supply Trouble Service Flow Chart
Power Supply
Block Trouble
NG
Check F901 Condition Replace F901
OK
Check F901
NG
Pin4/Pin6/ Pin8 Replace F901
Condition
OK
Check on D101/D102/
D103/D104/D105
Output Voltage Condition
NG
Check on Q103 Pin1
NG
Replace Q103
Voltage Condition 2~5V
NG
NG
Replace U302 Replace TR901
OK
OK
Check CON1~4
Output Voltage