2. Service Troubleshooting by Symptom
2-1
Service Troubleshooting by Symptom
symptom
Action
Remarks
Unit does not turn the power on
Spontaneously shuts down right
after turned on
Replace AC ADAPTER
or replace
MAIN PCB ASS’Y
Carriage does not operate
Replace MOTOR ASS’Y
or replace
MAIN PCB ASS’Y
Acoustic noise
Eliminate the foreign substance
or replace MOTOR UNIT
or replace
MAIN PCB ASS’Y
or replace
CARRIAGE ASS’Y
M
a
lfu
n
c
tio
n
Scanning lamp does not light up
ReplaceCARRIAGE ASS’Y
or replace
MAIN PCB ASS’Y
Blurred image
Clean PLATEN GLASS ASS’Y
or replace
CARRIAGE ASS’Y
or replace
MAIN PCB ASS’Y
Solid vertical line
Clean PLATEN GLASS ASS’Y
or replace CARRIAGE ASS’Y
Solid horizontal line
Check the connection with PC
or replace USB cable
or replace
MAIN PCB ASS’Y
F
a
u
lty
s
c
a
n
n
e
d
im
a
g
e
Faulty color reproduction
Replace
MAIN PCB ASS’Y
1 - 2
Summary of Contents for CanoScan 9950F
Page 5: ...Part 1 Maintenance ...
Page 18: ...Part 2 Technical Reference ...
Page 21: ...Part 3 Parts Catalog ...
Page 22: ...FIGURE 1 CABLE ...
Page 26: ...Part 4 Appendix ...