The Copy Is Blank; The Copy Is Solid Black - Canon PC400 Service Manual

21. The copy is blank.

Cause
Cartridge
Drum drive assembly
High-voltage
transformer
Terminals for primary
charging,
Cartridge

22. The copy is solid black.

Cause
COPYRIGHT © 1998 CANON INC.
Step Checks
1 Is the cartridge set in the copier?
2 Does the cartridge have toner?
3 Has the seal been removed from
the cartridge?
4 Set the cartridge in the copier,
and close the copier.
Does the drum cover shutter
open without fail?
5 Is the drum drive gear rotating
normally?
6 Are the primary charging
terminal at the front left of the
cartridge and the high-voltage
terminal at the bottom of the
copier in firm contact?
Step Checks
1 Is the scanning lamp ON during
copying operation?
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 10 TROUBLESHOOTING
YES/NO Remedies
NO Set the cartridge in the
copier.
NO Replace the cartridge.
NO Remove the seal.
NO Make adjustments so that
the shutter opens
smoothly.
NO Check the drum drive
assembly.
YES Check the high-voltage
transformer (DC controller/
DC power supply PCB).
NO 1. Check the contact for
electrical continuity.
2. Try replacing the
cartridge.
YES/NO Remedies
YES Check if the cartridge is
set properly.
NO See "The scanning lamp
fails to go ON."
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