Toner Supply; Monochrome Density Adjustment; Dev. Bias Choice - Konica Minolta bizhub C200 Service Manual

10. Service Mode
10.4.7

Toner Supply

Functions • To adjust the set T/C level by replenishing an auxiliary supply of toner when a low ID
occurs due to a lowered T/C after large numbers of prints have been made of origi-
nals having a high image density.
Use • When there is a drop in T/C.
Setting/ 1. Call the Service Mode to the screen.
2. Touch these keys in this order: [Imaging Process Adjustment] → [Toner Supply].
Procedure
3. Select the color, for which supply of toner is to be replenished.
4. Pressing the Start key will let the machine detect the current toner density and; if the
density is lower than a reference value, a toner replenishing sequence and then a
developer agitation sequence are run.
5. These sequences are repeated up to a maximum of four times until the toner density
reaches the reference value. If the toner density is found to be higher than the refer-
ence value, only a developer agitation sequence is carried out.
10.4.8

Monochrome Density Adjustment

Functions • To fine-adjust the density of the printed image for a black print.
Use • To vary the density of the printed image of a black print.
Adjustment • The default setting is 0.
Range
Adjustment If the black is light, touch [+].
Instructions If the black is dark, touch [-].
Setting/ 1. Call the Service Mode to the screen.
2. Touch these keys in this order: [Imaging Process Adjustment] → [Monochrome Den-
Procedure
sity Adjustment].
3. Change the setting value using the [+] / [-] keys.
10.4.9

Dev. Bias Choice

Functions • To change the setting of the developing bias voltage.
• When this function is turned ON, it decreases the developing bias voltage, thereby
preventing voltage leak from occurring.
Use • Use when patches of white occur in the image in an ambience of low atmospheric
pressure, such as in high altitudes.
• If ON is set, the screen doesn't display [Service Mode] → [Imaging Process Adjust-
ment] → [Gradation Adjust] and the Gradation Adjust is not allowed.
Setting/ • The default setting is OFF.
Procedure
180
-2 to +2 (step: 1)
ON
Field Service Ver. 2.0 Dec. 2008
"OFF"