Blank Copy; Black Copy - Minolta EP1054 Service Manual

FrameMaker Ver.5.5(PC) EP1054/EP1085/EP2030 TROUBLESHOOTING
98.05.15

(1) Blank copy

Cause Step
Charging failure Is the PC Drum Charge
1
Corona installed correctly?
Are the PC Drum Charge
2 Corona wire and grid mesh
normal?
Is the wiring between High
3 Voltage Unit HV1 and corona
wire normal?
Developing Unit Is the PC Unit inserted all
4
out of position the way into position?
Are the Ds Rolls in contact
5
with the PC Drum?
Is the Developing Unit con-
6
nector plugged in?
Is the drive transmission to
7
the Developing Unit normal?
Image transfer Is the Image Transfer
8
failure Corona wire normal?
Is the wiring between High
9 Voltage Unit HV1 and
corona wire normal?
Paper guide Is the paper guide shorted
shorting 10 to the frame?

(2) Black copy

Cause Step
PC Drum ground- Is the PC Drum properly
1
ing failure grounded?
Developing bias Is the developing bias con-
2
failure tact normal?
Is the developing bias har-
3
ness normal?
Light path failure Has condensation formed
4 on the mirrors, lens, or PC
Drum?
Are the mirrors installed
5
properly?
Exposure Lamp's Does the Exposure Lamp
6
failure to turn ON light up?
Check Item Result
NO
NO
YES Replace HV1.
NO
NO
NO
NO
NO
NO
YES Replace HV1.
NO
YES
Check Item Result
NO
NO
YES Replace the High Voltage Unit.
NO
YES
NO
NO
T-66
Action
Install correctly.
Check and replace if neces-
sary.
Correct the wiring.
Fully tighten the knob.
Reinstall the Developing
Unit.
Plug it in.
Check and replace parts if
necessary.
Check and replace if neces-
sary.
Correct wiring.
Connect the paper guide
through the resistor to the
frame.
Action
Clean or replace the PC
Drum Ground Plate.
Clean or replace the devel-
oping bias contact.
Replace the harness.
Clean the mirrors and
lenses, and run the Drum
Dehum operation.
Reinstall the mirrors.
Take the action for malfunc-
tion code C0400.