Samsung DVD-907 Service Manual page 87

Troubleshooting
No
After resoldering
SIC7, DIC1,
unchanged,
replace IC.
Check or replace disc motor
8-4
Abnormal rotation
of disc motor
Yes
Input of RF
signal is normal?
For CD, SIC7 38 terminal.
For DVD, DIC1 Pin 50
Yes
DMO
output is normal?
For CD, SIC7 55 terminal.
For DVD. DIC1 Pin 54
Yes
SIC6 Pin 1
output is normal?
Yes
SIC5 Pin22
signal is normal?
Yes
No
RIC3 Pin 6
output is normal?
RIC1 Pin 42
(for CD) or 43(for DVD)
output are normal?
Check path to SIC7
and DIC1
No
Check SIC6
soldering and power
No
Check SIC5 soldering and
power or Replace SIC5
No
Check RIC3 peripheral
circuit and A, B, C, D
No
Check RIC1
soldering and power
Samsung Electronics