Troubleshooting
NO LD CD ON
B
No
RIC1-22 is 5V?
Check RIC1
Yes
Divide RQ2 emitter terminal
voltage and 5V real voltage
difference into 10ohm.
Yes
No
Open check in related circuit.
Current exceeds 0.1A?
Yes
LD out pick-up replace.
Samsung Electronics
5-3
