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Troubleshooting
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7.4.4 C3: Shading Correction malfunction
7.4.5 C4: Cooling Fan Motor malfunction
7.4.6 Cb: Communication Error
Check Item Remedy
Is C3 displayed during Function Mode
“b6” execution?
→
No Replace PWB-BB.
Replace CCD Assy(PWB-A).
↓
Yes
Performs the function mode (b6) once
again. (Refers to the clause of
Shading Correction in chapter 6).
→
NG Replace PWB-BB.
Replace CCD Assy(PWB-A).
Check Item Remedy
Is C4 shown even when power is
turned OFF, then ON again?
→
No OK
↓
Yes
Does the Cooling Fan Motor (M3, M4)
turn smoothly after the Power Switch
has been turned ON?
→
Yes Check Wiring.
Replace PWB-BB.
↓
No
Check M3 and M4.
→
NG Replace M3.
Replace M4.
→
OK Check Wiring.
Replace PWB-BB.
Check Item Remedy
Is Cb shown even when power is
turned OFF, then turned ON again?
→
No OK
↓
Yes
Is the dedicated interface cable used?
→
No Replace the Interface Cable.
↓
Yes
Checks the connection of an interface
cable.
→
NG Reconnect the Interface Cable.
↓
OK
Replace the following parts sequentially.
Interface Cable
Printer I/F Board (PWB-EE) of Scanner
Interface Board of Printer