Samsung DVD-S221, Service Manual

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Troubleshooting
3-4 Samsung Electronics
Abnormal rotation of
disc motor
Input of RF signal
is normal? (SIC1-15)
SPD output is normal?
(SIC1-35)
After resoldering SIC1.
SIC3-2 output (FG)
is normal?
SIC3-10 signal
MON is "H" ?
Check or replace disc motor.
Check SIC1, MIC1.
Check SIC3 soldering and power.
Check path to RIC1 and SIC1.
Check RIC1 soldering and power.
RIC1-70 output
are normal?
RIC1-71 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
MIC1-36, 37 is
Open ; "L", "L" ?
Close ; "H", "H"?
Check SIC3-35, 36
output at open/close
Check signal line state from
SIC3-35, 36 to tray motor.
Micom (MIC1) error.
Check SIC3.
Yes Yes
No No