MX-M950, MX-MM1100 (serv.man20). Details of Each Section - H Image Process Section - Sharp Copying Equipment Service Manual (repair manual). Page 10

MX-M1100  IMAGE PROCESS SECTION  H – 10

The process control is executed in the following flow. 
Along with execution of the OPC drum dark potential correction, the high density image correction (high density process control), and the half-
tone density correction (half-tone process control), the developing bias voltage, the main charger grid voltage, and the laser power are cor-
rected and changed in the following flow. 
The developing bias voltage, the main charger grid voltage, and the laser power are finally determined with Job No. 6B, 8B, and 9B. 

Job

No.

Job

No.

1

OPC drum dark potential correction
(DVB + Cleaning filed)

Vg/Vo

2A

DVB

3

EDV

Effective developing bias voltage check

4A

EDV

Effective developing bias voltage securing

5A

150V

6A

LDP

Half-tone density correction (Half-tone process control)

7

EDV

Effective developing bias voltage check

8A

EDV

Effective developing bias voltage securing

9A

150V

Proper cleaning field securing

4B

DVB

Developing bias voltage change

5B

Vg/Vo

OPC drum dark potential correction

2B

VL

OPC drum dark potential detection

8B

DVB

Developing bias voltage change

9B

Vg/Vo

OPC drum dark potential correction

6B

HVL/VL

High density image correction (High density process
control) (Developing bias voltage correction)

Laser power change/ OPC drum light potential
change (OPC drum light potential VL detection)

Proper cleaning field securing (keep the diffrence in
potential between DV bias and Drum serface.)

: Main charger grid voltage

: OPC drum dark potential

: Developing bias voltage

: Effective developing bias voltage (DVB - VL)

: Vo - DVB

: Half-tone potential

: Light potential

: Laser power