User Check- Page 160

CHAPTER 6  TROUBLESHOOTING

6-38

I-20 Downward fogging of solid black

Possible cause Step Check Result Remedy

Toner cartridge
failure

1 Is the problem solved after

replacing the toner cartridge?

Yes Replace the toner cartridge.

High-voltage
power supply
PCB failure

2 Is the problem solved after

replacing the high-voltage
power supply PCB?

Yes Replace the high-voltage power

supply PCB.

I-21 Horizontal lines

Possible cause Step Check Result Remedy

Ground

contacts

Paper feed roller 1 Are the feed roller shaft and

the ground contact connected
correctly?

No Check the connection

between the shaft and
the ground contact.

Also check the ground
contact on the back of
the feed roller.  Refer
to

 P.4-28

.

Paper cassette
contacts

2 Are the ground contacts on the

back side of the paper cassette
connecting correctly?

No Clean the contacts.

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