Samsung DVD-V5450 Service Manual page 205

Troubleshooting
5-2
Key Operation or
Remote Control Error
Is the measurement of
power with in normal value?
is the SMPS to Main connector
properly connected?
YES
NO
XT602 8MHz
oscillation is normal?
(XT602 Waveform)
YES
NO
Check the circuity
around IC601 reset?
YES
NO
Check the soldering
around IC601 good?
YES
NO
Key operatious such
as STOP,PLAY,OPEN
are normal?
YES
End repairs
NO
Check power and front connector
Check the circuity around the clock
Check the circuity around
IC601 reset
Check the soldering around the
IC601
Check the circuity around the swich.
check the condition of commmunication
with Main Micom
(IC601-11;SCLK, 12;TXD, 13;RXD,
51;RRQ, 66;SRQ)
STOP,PLAY,OPEN
Key operatious are
normal?
YES
Change IC701
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