Minolta EP5000 General, Mechanical/Electrical page 387

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