Kyocera FS-9120DN Service Manual page 50

Maintenance
item No.
U101 Setting control voltages
Description
Changes the developing bias voltage and transfer voltage by changing the developing bias control voltage and
transfer control voltage.
Purpose
To check or change the developing bias and transfer voltage.
Method
1. Enter the maintenance mode and press the
>Adjust High
[U101] Voltage
2. Press the
3. Press the
Display
DEV BIAS
DEV DUTY
DEV SBIAS
TC DATA
Increasing the DEV BIAS setting makes the image darker; decreasing it makes the image lighter.
Increasing the DEV DUTY setting makes the image lighter; decreasing it makes the image darker.
Increasing the DEV SBIAS setting makes the image darker; decreasing it makes the image lighter.
Increasing the TC DATA setting makes the transfer voltage higher, and decreasing it makes the voltage
lower.
4. Press the ENTER key. "_" will blink.
>>DEV BIAS
[101.1] ### KHz
5. Press the
key to change the preset value.
6. Press the ENTER key. The value is set.
To keep the preset value, press the CANCEL key.
>
key to display the submenu screen.
or key to select an item for which the preset value is to be changed.
Description
Developing bias AC component
frequency at image formation
Developing bias AC component duty
at image formation
Developing bias shift amount
Transfer control voltage
or key to move "_" to the digit position at which the value is to be changed and press the
Description
or key to display "U101".
Setting range
-255 to 255 (KHz)
-100 to +100 (%)
-1 to +1
0 to 255 (µA)
FS-9120DN/9520DN
Initial setting
0
0
0
120
or
1-4-17