Minolta EP4000 - Page 387

Interleaf EP5000/EP4000 TROUBLESHOOTING
97.04.01
T-112
1149SBT050303A
3) Low Image Density
Cause Step Check Item Result Action
PC Drum life
1
Does the PC Drum have
enough service life?
NO
Change the PC Drum.
2
Do the fan motors turn
properly? (Ozone deteriora-
tion, temperature rise)
NO
Troubleshoot the fan mo-
tors.
PC Drum grounding
failure
3
Is the PC Drum grounded
properly?
NO
Clean or change the PC
Drum Ground Plate.
Drum charge failure
4
Are the Comb Electrode
and grid mesh normal?
NO
Check and change if neces-
sary.
Is the wiring between High
Voltage Unit HV1 and the
YES
Change HV1.
5
PC Drum Charge Corona
normal?
NO
Correct the wiring.
Optical failure
6
Are the mirrors and lenses
dirty or covered with con-
densation?
YES
Clean the mirrors and
lenses.
Image transfer fail-
ure
7
Is the Image Transfer Coro-
na dirty?
YES
Clean the Image Transfer
Corona or change the wire.
8
Is the copy paper damp?
YES
Change the copy paper and
instruct the user in how to
store paper and to keep the
copier plugged in during the
night.
Developing failure 9 Is Db adjusted properly? NO Make Db adjustment.
10
Are the Ds Rolls in contact
with the PC Drum?
NO
Reinstall the Developing
Unit.
11
Is the developing bias con-
tact normal?
NO
Clean or Change the devel-
oping bias contact.