Samsung DVD-P191 Service Manual page 26

Trouble Shooting
4-8
FINE SEEK Check
DIC1-86 (RFSUM)
output is normal ?
Yes
MIC1
- 15, 16 (T+,T-)
Terminal outputs are
normal ?
Refer to a pattern
Yes
image of Table 4-4
Check CN23 and P/U
No
Check RFSUM input from P/U.
No
Check DIC1 peripheral circuit
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