Minolta EP3010 Manual page 325

3. Low Image Density
Cause Step
PC Drum life
PC Drum ground-
ing failure
Drum charge fail-
ure
Optical failure
Image transfer fail-
ure
Developing failure
Check Item
Does the PC Drum have
1
enough service life?
Do the fan motors turn prop-
2 erly? (Ozone deterioration,
temperature rise)
Is the PC Drum properly
3
grounded?
Are the PC Drum Charge
4 Corona wire and grid mesh
normal?
Is the wiring between High
5 Voltage Unit HV1 and corona
wire normal?
Are the mirrors and lenses
6 dirty or covered with conden-
sation?
Is the Image Transfer Corona
7
dirty?
Is the copy paper damp?
8
9 Is Db adjusted properly?
Are the Ds Rolls in contact
10
with the PC Drum?
Is the developing bias contact
11
normal?
T-88
Result Action
Replace the PC Drum.
NO
Troubleshoot the fan motors.
NO
Clean or replace the PC Drum
NO
Ground Plate.
Check and replace if neces-
NO sary.
YES Replace HV1.
Correct the wiring.
NO
Clean the mirrors and lenses.
YES
Clean the Image Transfer
YES
Corona and 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 Unit.
NO
Clean or replace the develop-
NO
ing bias contact.