Service Troubleshooting By Symptom - Canon CanoScan 9950F Service Manual

2. Service Troubleshooting by Symptom

2-1
Service Troubleshooting by Symptom
Unit does not turn the power on
Spontaneously shuts down right
after turned on
Carriage does not operate
Acoustic noise
Scanning lamp does not light up
Blurred image
Solid vertical line
Solid horizontal line
Faulty color reproduction
symptom
Replace AC ADAPTER
or replace
Replace MOTOR ASS'Y
or replace
Eliminate the foreign substance
or replace MOTOR UNIT
or replace
or replace
ReplaceCARRIAGE ASS'Y
or replace
Clean PLATEN GLASS ASS'Y
or replace
or replace
Clean PLATEN GLASS ASS'Y
or replace CARRIAGE ASS'Y
Check the connection with PC
or replace USB cable
or replace
Replace
Action
MAIN PCB ASS'Y
MAIN PCB ASS'Y
MAIN PCB ASS'Y
CARRIAGE ASS'Y
MAIN PCB ASS'Y
CARRIAGE ASS'Y
MAIN PCB ASS'Y
MAIN PCB ASS'Y
MAIN PCB ASS'Y
1 - 2
Remarks