Canon 8800F - CanoScan - Flatbed Scanner, Service Manual

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2-1 Troubleshooting by Symptom
CanoScan 8800F Maintenance
2. Troubleshooting
SYMPTOM ACTION REMARKS
Malfunction 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 ASS'Y
or replace MAIN PCB ASS'Y
or replace CARRIAGE ASS'Y
Scanning lamp does not light up Replace CARRIAGE ASS'Y
or replace MAIN PCB ASS'Y
Faulty
scanned
image 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
Faulty color reproduction Replace MAIN PCB ASS'Y
<2. Troubleshooting>