Low Image Density - Minolta EP1054 General Instructions Manual

(3) Low Image Density

Cause Step
PC Drum life
1
2
PC Drum ground-
3
ing failure
Drum charge
failure 4
5
Optical failure
6
Image transfer
7
failure
8
Developing failure 9
10
11
Check Item
Does the PC Drum have
enough service life?
Do the fan motors turn
properly? (Ozone deteriora-
tion, temperature rise)
Is the PC Drum properly
grounded?
Are the PC Drum Charge
Corona wire and grid mesh
normal?
Is the wiring between High
Voltage Unit HV1 and
corona wire normal?
Are the mirrors and lenses
dirty or covered with con-
densation?
Is the Image Transfer
Corona dirty?
Is the copy paper damp?
Is Db adjusted properly?
Are the Ds Rolls in contact
with the PC Drum?
Is the developing bias
contact normal?
T-67
Result Action
Replace the PC Drum.
NO
Troubleshoot the fan
NO motors.
Clean or replace the PC
NO
Drum Ground Plate.
Check and replace if nec-
NO essary.
YES Replace HV1.
Correct the wiring.
NO
Clean the mirrors and
YES lenses.
Clean the Image Transfer
YES
Corona or replace the wire.
Replace copy paper and
instruct the user in how to
YES store paper and to keep the
copier plugged in during the
night.
NO Make Db adjustment.
Reinstall the Developing
NO
Unit.
Clean or replace the devel-
NO
oping bias contact.