Poor Image Quality; Acoustic Noise - Canon CANOSCAN D1230 series Service Manual

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