Service manual

CHAPTER 5
5 - 5
COPYRIGHT © 2001 CANON INC. CANOSCAN D1230U/D2400U REV.0 MARCH 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
Possible Cause Releated Parts Check Method Corrective Action
Drive belt broken or worn
Gears broken or worn
Start button failure
Drive motor failure
Drive belt
Gear plate 2
Button PCB
Motor assembly
Trial replacement
Trial replacement
Trial replacement
Trial replacement
Replace the drive belt
Replace the gear plate 2
Replace the button PCB
Replace the motor assembly
Possible Cause
Releated Parts
Check Method Corrective Action
Scanning lamp is dark
Dirt on document glass
Main PCB failure
CCD PCB failure
Scanning unit
Document glass
Main PCB
Scanning unit
Visual check
Visual check
Trial replacement
Trial replacement
Replace the scanning unit
Clean the document glass
Replace the main PCB
Replace the scanning unit
Possible Cause Related Parts Check Method Corrective Action
Motor assembly failure
Main PCB failure
Scanning unit failure
Dirt on sliding rod
Reference sheet is
improperly positioned
Motor assembly
Main PCB
Scanning unit
None
Document glass
Trial replacement
Trial replacement
Trial replacement
Visual check
Trial replacement
Replace the motor assembly
Replace the main PCB
Replace the scanning unit
Clean the sliding rod
Replace the document glass
C. Scanning Unit Movement Failure
Table 5-3
D. Poor Image Quality
Table 5-4
E. Acoustic Noise
Table 5-5