Minolta EP5000 General, Mechanical/Electrical page 386

Interleaf EP5000/EP4000 TROUBLESHOOTING
97.04.01
1149SBT050301A
1) Blank Copy
Cause Step
Charging failure
1
2
3
Developing Unit out 4
of position
5
6
7
Image transfer fail-
8
ure
9
Paper guide shorting
10
1149SBT050302A
2) Black copy
Cause Step
PC Drum grounding
1
failure
Developing bias fail-
2
ure
3
Light path failure
4
5
Exposure Lamp's
6
failure to turn ON
Check Item Result
Is the PC Drum Charge Co-
rona installed correctly?
Are the Comb Electrode
wire and grid mesh normal?
Is the wiring between High
Voltage Unit HV1 and the
PC Drum Charge Corona
normal?
Is the PC Unit in position?
Are the Ds Rolls in contact
with the PC Drum?
Is the Developing Unit con-
nector plugged in?
Is the drive transmission
mechanism to the Develop-
ing Unit intact?
Is the Image Transfer Coro-
na wire normal?
Is the wiring between High
Voltage Unit HV1 and coro-
na wire normal?
Is the paper guide shorted
to the frame?
Check Item Result
Is the PC Drum properly
grounded?
Is the developing bias con-
tact normal?
Is the developing bias har-
ness intact?
Has condensation formed
on the mirrors, lenses, or
PC Drum?
Are the mirrors installed
properly?
Does the Exposure Lamp
light up?
T-111
Action
Install correctly.
NO
Check and change if neces-
NO
sary.
Change HV1.
YES
Correct the wiring.
NO
NO Reinstall the Unit.
Reinstall the Developing
NO
Unit.
Plug it in.
NO
Check and change any de-
NO fective part.
Check and change if neces-
NO
sary.
Change HV1.
YES
Correct wiring.
NO
Connect the paper guide
through the resistor to the
YES
frame.
Action
Clean or change the PC
NO
Drum Ground Plate.
Clean or replace the devel-
NO
oping bias contact.
Change the High Voltage
YES
Unit for drum charging.
NO Change the harness.
Clean the mirrors and
lenses, and run the Drum
YES
Dehum. operation.
Reinstall the mirrors.
NO
Take the action for malfunc-
NO
tion code C0400.