Olivetti d-Copia 5200MF, Service Manual

Page: 82 / 502

2KR/2KS
1-3-45
U100
Setting the main high voltage
Description
Performs main charging.
Purpose
To check main charging.
Method
1. Press the start key.
2. Select the item to be operated.
3. Press the start key. The selected operation starts.
4. To stop operation, press the stop key.
Completion
Press the stop key when main charger output stops. The screen for selecting a maintenance item No. is dis-
played.
U101
Setting the other high voltages
Description
Sets the developing bias control voltage, the transfer control voltage, and the separation control voltage or
checks the output of these voltages.
Purpose
To check the developing bias, the transfer voltage and the separation voltage or to take measures against
drop of image density or background fog.
Setting
1. Press the start key.
2. Select the item to be set.
3. Change the setting using the +/- or numeric keys.
Increasing the DEV BIAS setting makes the image darker; decreasing it makes the image lighter.
Increasing the DEV SBIAS setting makes the image darker.
Increasing the DEV DUTY setting makes the image lighter; decreasing it makes the image darker.
Increasing the TC DATA setting makes the transfer voltage higher, and decreasing it makes the voltage
lower.
Increasing the SC DATA setting makes the separation voltage higher, and decreasing it makes the volt-
age lower.
4. Press the start key. The value is set.
Completion
Press the stop key. The screen for selecting a maintenance item No. is displayed.
Maintenance
item No.
Description
Display Description
MC Turning the main charger on
LASER Turning the main charger on and the laser scanner unit on and off
Display Description Setting range Initial setting
DEV BIAS Developing bias AC component frequency
at image formation 20 to 32 28
DEV SBIAS Developing shift bias potential at image
formation 0 to 3 1
DEV DUTY Developing bias AC component duty at
image formation 0 to 100 50
TC DATA Transfer control voltage 0 to 300 130
SC DATA Separation control voltage 0 to 60 20
Y111960-2 Service Manual