Utax P-4532DN - (1-3) Image is too light

7-6
Troubleshooting ＞ Image formation problems
[CONFIDENTIAL]
(1-3)Image is too light
Print example Cause of trouble
1 Variance in environments (dew formation).
2 Toner is under supplied, or deteriorated in quality.(Under charged)
3 The volatage of the developing bias is too low.
4 The volatage of the transfer current is too low.
5 The power of LSU laser is too low.
6 The surface potential of the drum is too high.
7 The contact pressure at the trasnfer roller and the drum is too low.
Defective part Check description Corrective Action
1
Paper
Check that the paper has moisture
absorbed. Check that the paper has
stored in a humid place.
If the paper is damp, replace.Choose a dry place to
store paper.
2
Drum unit
Check that the drum has dew con-
densation.
If a dew condensation is observed, perform drum
refreshing.
(System Menu >Adjustment / Maintenance)
1. Check if the cleaning lamp is
dirty.
2. Check whether it is lit.
1. If the cleaning lamp is dirty, clean.
2. If not cured, or it does not light, replace the
drum unit.
3
Developer unit
1. Generate PGs by service mode
and check the following
2. Check if the connecting termi-
nals for developer bias are
deformed.
If the connecting terminals are deformed, correct for
a proper conduction.
4
Toner container Shake the toner container up and
down approx. 10 times, and check
the following:
1. Check remaining toner by the
indicator.
2. Check whether the toner supply
inlet is open.
If the message prompting toner replenishing is
shown, the toner inlet is not open, replace the toner
container.
5
High voltage PWB
Replace the high voltage PWB.
6
Transfer roller unit
1. Check whether the connecting
terminals.
1. If the connecting terminals are deformed, cor-
rect for a proper conduction.
2. Replace transfer roller unit.
2. Check if the contact between
the transfer roller and durm is
correct.
Re-mount the transfer roller.
7
LSU
1. The laser diode on the LSU
APC PWB is out of control.
2. Check whether the internal mir-
rors are contaminated.
Replace the LSU.
8
Control PWB
The control PWB is detective. Replace the control PWB.