FS-9120DN/9520DN
1-4-17
Maintenance
Description
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 or key to display "U101".
>Adjust High >
[U101] Voltage
2. Press the key to display the submenu screen.
3. Press the or key to select an item for which the preset value is to be changed.
Display Description Setting range Initial setting
DEV BIAS Developing bias AC component -255 to 255 (KHz) 0
frequency at image formation
DEV DUTY Developing bias AC component duty -100 to +100 (%) 0
at image formation
DEV SBIAS Developing bias shift amount -1 to +1 0
TC DATA Transfer control voltage 0 to 255 (µA) 120
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 or key to move "_" to the digit position at which the value is to be changed and press the or
key to change the preset value.
6. Press the ENTER key. The value is set.
To keep the preset value, press the CANCEL key.
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