Kyocera Mita KM-1505 Service Manual page 49

2BT
Maintenance
item No.
U101 Setting high voltages
Description
Changes the developing bias voltage and transfer voltage by changing the developing bias control voltage and
transfer control voltage. Also checks the transfer output voltage.
Purpose
To check and change high voltages other than the main charger voltage.
Start
1. Press the start key. A selection item appears.
2. Select the item to be set or checked by lighting image mode LEDs using the image mode selection key.
Image mode LEDs
: Off, : On
Setting the developing bias
1. Select the item to be adjusted by lighting a copy exposure indicator using the copy exposure adjustment
keys.
2. Change the setting using the zoom +/– keys.
Copy exposure indicator Description
Exp. 1
Exp. 3
Increasing the setting makes the developing bias higher and the image darker; decreasing it makes the
bias lower and the image lighter.
3. Press the start key. The value is set.
Setting the transfer voltage
1. Select the item to be adjusted by lighting a copy exposure indicator using the copy exposure adjustment
keys.
2. Change the setting using the zoom +/– keys.
Copy exposure indicator Description
Exp. 1
Exp. 3 (on)
Exp. 5
Exp. 1 (flashing)
Increasing the exp. 1 setting makes the transfer voltage higher, and decreasing it makes the voltage lower.
Increasing the exp. 5 setting makes the transfer voltage output timing later and improves paper separation
performance.
3. Press the start key. The value is set.
4. To check the transfer voltage output, light the copy exposure indicator exp. 3 using the copy exposure
adjustment keys and press the start key. The currently set transfer voltage is output.
5. To stop the transfer voltage output, press the stop/reset key.
Test copy mode
While this maintenance item is being performed, copying from an original can be made in test copy mode.
Completion
Press the stop/reset key while a selection item is displayed. The indication for selecting a maintenance item
No. appears.
1-4-18
Description
Description
Setting the developing bias
AutoExp.
Text & Photo
Photo
Text
Setting and checking the transfer voltage
AutoExp.
Text & Photo
Photo
Text
Developing bias control voltage
during image formation
Developing bias control voltage
during no image formation
Transfer control voltage
Turning the transfer voltage
output on
Timing at which the transfer voltage 160 to 360
output turns on
Timing at which the transfer voltage 450 to 650
output turns off timing
Setting range Initial setting
0 to 255 200
0 to 255 34
Setting range Initial setting
0 to 255 94
– –
256
544