COPYRIGHT © 2002 CANON INC.
2000 2000 2000 2000
CANON SmartBase PC1210D/1230D/1270D REV. 1 MAR. 2002
CHAPTER 7 TROUBLESHOOTING
7-24
Contact sensor
17) Try replacing the contact sensor. Is the problem corrected?
YES: End.
Analog processor PCB, Image processor PCB
18) Try replacing the analog processor PCB. Is the problem corrected?
YES: End.
NO:
Replace the image processor PCB.
3.1.2 The output is too dark.
Image density
1) Is the image density setting correct?
•
In the case of copier functions: PRINT EXPOSURE of COMMON
SETTINGS and STANDARD EXPOSURE of COPY SETTINGS
on user mode menu.
•
In the case of printer functions or fax functions, PRINT EXPO-
SURE of COMMON SETTINGS on user mode menu.
NO:
Correct the image density setting.
General condition
2) Execute ‘PRINT test’. Is the output image normal? (See 3.21.5 of
Chapter 2.)
YES: Go through steps 8) to 12).
NO:
Go through steps 3) to 7).
High-voltage contact (between cartridge and high-voltage spring)
3) Is the high-voltage spring used to supply high voltage to the car-
tridge soiled? (Remove the cartridge to check.)
YES: Clean it.
High-voltage contact (between high-voltage spring and DC controller PCB; J205, J207)
4) Is the connection between the high-voltage spring and the DC con-
troller PCB (J205, J207) normal?
YES: Correct it. If it cannot be corrected, replace the faulty part.
Connector
5) Is the connection of the following connectors normal: J201 and
J204 on the DC controller PCB; J303, J304, J312, and J316 on the
image processor PCB; J3122 and J801 in the laser scanner unit?
NO:
Connect them firmly. If the flexible cable has a scratch, replace it.
Cartridge
6) Try replacing the cartridge. Is the problem corrected?
YES: End.
Laser scanner unit, DC controller PCB
7) Try replacing the laser scanner unit. Is the problem corrected?
YES: End.
NO:
Replace the DC controller PCB.
