Service manual

Troubleshooting
7-2 Samsung Electronics
Abnormal rotation of
disc motor
Input of RF signal
is normal? (SIC1-59)
SPD output is normal?
(SIC1-74)
After resoldering SIC1.
DRIC1-24 output (FG)
is normal?
DRIC1-23 signal
MON is "H" ?
Check or replace disc motor.
Check DIC1, MIC1.
Check DRIC1 soldering and power.
Check path to RIC1 and SIC1.
Check RIC1 soldering and power.
RIC1-86 output
are normal?
RIC1-88 output
is normal?
Check RIC1 peripheral
circuit and A, B, C, D.
Yes
Yes Yes Yes
Yes
Yes
No
No No
No
No
No
No Tray open/close
MIC1-84, 85 is
Open ; "L", "L" ?
Close ; "H", "H"?
Check DRIC2-26, 27
output at open/close
Check signal line state from
DRIC1-26, 27 to tray motor.
Micom (MIC1) erroe.
Check DRIC2
Yes Yes
No No