Samsung SF6500 Service Manual page 94

Maintenance & Troubleshooting
7-4-5 CIS LED Not Lit
Y
Load document in
Press the COPY
Document fed?
START
feeder
button
N
See chart 7-4-4
Check +5V, +12V
N
Works properly? (P1-16, 17, 18, P1-1
CIS LED lights
in the main b'd)
Y
Y
Normal?
N
Replace the power Check PIN27 of
supply U25
Y
Replace CIS
+5 V ?
N
Replace the main b'd
END
Samsung Electronics 7-9