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CHAPTER IV -18
I-20 Horizontal lines
Possible cause Step Check Result Remedy
HV.GND
contacts
(Fig.4-5)
SR electrode 1 Are the SR electrodes between
the printer body and the drum
unit dirty?
Yes Clean both
electrodes.
SR connection
failure
2 Are the SR electrodes between
the printer body and the drum
unit connected correctly?
No Check the SR
connection.
Feed roller 3 Are the feed roller shaft and the
ground contact connected
correctly?
No Check the
connection between
the shaft and the
ground contact.
I-21 Light rain
Possible cause Step Check Result Remedy
Drum unit failure 1 Is the problem solved after
replacing the drum unit which
contains no more starter
sheet**?
Yes Replace the drum unit.
SR PCB failure 2 Is the problem solved after
replacing the SR PCB?
Yes Replace the SR PCB.
High-voltage
power supply
PCB failure
3 Is the problem solved after
replacing the High-voltage
power supply PCB?
Yes Replace the High-voltage
power supply PCB.
**Note: Make sure to use the used drum unit which has already ejected the starter sheet.
It is not possible to find the drum unit failure if you use a new drum unit with the
starter sheet.
Note: Make the printer in the light rain test mode as follows before
checking;
1. Turn on the power switch and open the top cover.
2. Hold down the panel switch until all the lamps are on, and then
release the switch.