Kyocera Mita KM-4530 Service Manual page 184

(19) Image is not
square.
Causes
1. Laser scanner unit positioned incorrectly.
2. Image scanning unit positioned incorrectly.
(20) Image contrast is
low (carrier scatter-
ing).
Causes
1. No developing bias output.
A. Developing bias wire makes poor contact.
B. Defective engine PCB.
C. Defective high-voltage transformer PCB.
(21) There is a regular
error between the
centers of the
original and copy
image when the DF
is used.
Causes
1. Misadjusted DF center line.
Causes
1. Laser scanner unit positioned incorrectly.
2. Image scanning unit positioned incorrectly.
Adjust the installation position of the laser scanner unit
(see page 1-6-32).
Adjust the installation position of the image scanning unit
(see page 1-6-33).
Causes
1. No developing bias output.
Check the developing bias wire. If there are any problems, replace it.
Check if CN12-9 on the engine PCB goes low when maintenance
item U030 is run. If not, replace the engine PCB.
Check if developing bias is output when there is no problem with the
main PCB while maintenance item U030 is run. If not, replace the
high voltage transformer PCB.
Causes
1. Misadjusted DF center line.
Readjust the DF center line (see page 1-6-69).
Check procedures/corrective measures
Check procedures/corrective measures
Check procedures/corrective measures
2BC/D
1-5-39