LG FFH-M217X Service Manual page 22

READING OK CHECK #C (= "NO DISC" DISPLAY)
C
IS ?V APPLIED TO PIN10 OF
PN501
LASER SUPPLY VOLTAGE CHECK
CHECK PN501 CONNECTOR LINE
IS 3.3 V APPLIED TO
PIN3 OF IC502
RF IC SUPPLY VOLTAGE
CHECK
IS 2.0 V PIN2 OF IC502
LASER CONTROL
VOLTAGE CHECK
- 2-15 -
DEFECTIVE IC505
DEFECTIVE IC502
DEFECTIVE Q501 OR
D502
DEFECTIVE PN501
CONNECTOR
DEFECTIVE PICKUP
LASER PART