Kyocera Mita KM-1530 Service Manual page 176

2AV/X
(19) Image is not
square.
1. Laser scanner unit positioned incorrectly.
2. Image scanning unit positioned incorrectly.
(20) Image contrast is
low (carrier scatter-
ing).
1-5
1. No developing bias output.
A. Developing bias wire makes poor contact.
B. Defective main PCB.
C. Defective high-voltage transformer PCB.
1-5-24
Causes
1. Laser scanner unit positioned incorrectly.
2. Image scanning unit positioned incorrectly.
Causes
Causes
1. No developing bias output.
Causes
Check procedures/corrective measures
Adjust the installation position of the laser scanner unit
(see page 1-6-26).
Adjust the installation position of the image scanning unit
(see page 1-6-30).
Check procedures/corrective measures
Check the developing bias wire. If there are any problems, replace it.
Check if CN4-4 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 there is no problem with the
main PCB while maintenance item U030 is run. If not, replace the
high-voltage transformer PCB.