Service manual

Other Service Functions

SM 5-49 M085/M086

Service

Maintenance

5.2.2 RESETTING THE DEVELOPING BIAS VOLTAGE COUNTER

Since print density is likely to become darker as the toner gets older, the developing bias is

lowered by degrees (bias voltage is reduced) according to the number of develop roller

rotations so that an almost fixed density can be maintained from the beginning to the end. The

developing bias voltage can be verified in the display of log information (

p.5-43 "Display of

the Machine's Log Information (Function code 80)").

1. Open the front cover.

2. <M085>

Press the Clear/Back button.

Press the Clear/Back button.

"Replace Drum? / 1. Yes 2. No" appears on the LCD.

3. <M085>

Press the button in order of

, 0, 0.

Press the Start button, and then press the

or button. "00" appears on the LCD, and

then press the OK button.

4. Close the front cover.