Service manual

Troubleshooting
7-4 Samsung Electronics
No pick-up home positing
SELED FG Ps0, PS1
is input normally.
(SIC1-2, 3)
Check SIC1 soldering and power.
Check SIC8, DRIC2 signal
transfer system
Yes
No
NO LD ON
RIC1-28 is 5V?
RIC1-29 output
is 200mV?
Current exceeds 0.1A?
LD out pick-up replace.
Open check in related circuit.
LD MPD error. Replace pick-up
RIC1-50
output is 0V?
Check MIC1
Yes
Yes
Yes Yes
Yes
No
No
No
No
Divide RQ1 emitter terminal
voltage and 5V real voltage
difference into 33ohm.
B