Samsung Electronics
9-1
9. Troubleshooting
No Power Detected
(stand by LED OFF)
F1SD01 is normal?
D1SS11, D1SF02
SHORT and OPEN
are normal?
Check feedback IC1S02
Change short circuited or
opened parts
Change fuse
Check 2'st Voltage and D1SS12
Replace SCS11A
NO
NO
Is there voltage at
Collector of
SCS11A
NO
YES
YES
YES
Operation of
SCS11A is
normal?
NO
YES
Key Operation or
Remote Control Error
Is the measurement of
power with in normal value?
is the SMPS to Main connector
properly connected?
End repairs
Check power and front connector
Check the circuity around the clock
Check the circuity around
IC601 reset
Check the soldering around the
IC601
Change IC701
NO
NO
Key operatious such
as STOP,PLAY,OPEN
are normal?
Check the circuity around the swich.
check the condition of commmunication
with Main Micom
(IC601-11;SCLK, 12;TXD, 13;RXD,
71;RRQ, 66;SRQ)
NO
YES
YES
Check the circuity
around IC601 reset?
Check the soldering
around IC601 good?
NO
YES
XT602 8MHz
oscillation is normal?
NO
YES
YES
STOP,PLAY,OPEN
Key operatious are
normal?
YES
