Mita PointSource Ai 3010, Service Manual

Page: 382 / 478

2AR
3-6-13
(19) Image is not square. Causes
1. Laser scanner unit positioned incorrectly.
2. Image scanning unit positioned incorrectly.
Causes Check procedures/corrective measures
1. Laser scanner unit positioned
incorrectly.
2. Image scanning unit positioned
incorrectly.
Adjust the installation position of the laser
scanner unit (see page 3-3-35).
Adjust the installation position of the image
scanning unit (see page 3-3-37).
(20) Image contrast is low
(carrier scattering).
Causes
1. No developing bias output.
Causes Check procedures/corrective measures
1. No developing bias output.
A. Developing bias wire makes poor
contact.
B. Defective main PCB.
C. Defective high-voltage
transformer PCB.
Check the developing bias wire. If there are
any problems, replace it.
Check if CN2-B55 on the main PCB goes low
when maintenance item U030 is run. If not,
replace the main PCB.
Check if developing bias is output when CN1-4
on the high-voltage transformer PCB is low
while maintenance item U030 is run. If not,
replace the high-voltage transformer PCB.