Samsung SF6500 Service Manual page 93

Maintenance & Troubleshooting
7-4-4 Malfunction on Document Feeding
Start
Key in ?
N
Replace the
OPE board
N
Document fed ?
Y
Document fed?
Replace the
motor ass'y
7-8
Check the OPE
MICOM
Check LCD display
Y
when document
is loading
Y
'DOCUMENT
N
READY' displayed ?
Y
Y
Logic 'H'?
N
Replace mother
b'd
Replace the
main b'd
Y
N
N
Check +24V motor
enable
(P2-27) in
the main board
END
Check +24V from
P19, 20 of CN7 in
the scan b'd
N
+24 V?
Y
Check 5V
0V
motor pulse (P1-9,
10, 11, 12) in the
main board
N
Normal?
Y
Replace the
scan b'd
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