MX-M950, MX-MM1100 (serv.man24). Details of Each Section - L Transfer Section - Sharp Copying Equipment Service Manual (repair manual). Page 3

MX-M1100  TRANSFER SECTION  L – 3

The toner attached to the cleaning roller is then cleaned by the
cleaning roller cleaning blade. 
The transfer cleaning control signal (XTHVCLPWM) duty is 
changed to control the polarity and the output voltage. 
The transfer cleaning ON/OFF is controlled by the signal (XTHVCL-
REM).

The cleaning roller itself is also cleaned. In this mode, a negative
voltage (-500V) is applied to attach residual toner on the cleaning
roller to the transfer belt. Then toner attached on the transfer belt is
cleaned by the transfer belt cleaning blade. 
The transfer cleaning control signal (XTHVCLPWM) duty is 
changed to control the polarity and the output voltage. 
The transfer cleaning ON/OFF is controlled by the signal (XTHVCL-
REM).

The transfer belt separation is executed by the transfer solenoid.
When the print engine receives print data and performs printing,
the transfer belt is in close contact with the OPC drum. 
In the following cases, the transfer belt is separated from the OPC
drum.
* When the process control is executed.
* When a jam occurs. 
* When the power is turned OFF.

1)

Open the front cover (a), and pull out the intermediate frame
(b).

2)

Remove the screw (a), and remove the cover (b).

Cleaning
mode for
transfer belt

Cleaning
mode for
cleaning roller

-500v

+200v

Cleaning
mode for
transfer belt

Cleaning
mode for
cleaning roller

-500v

+200v

OPC Drum

Transfer unit

A

Transfer separation solenoid

L - 4 / a

A

a

b

a

b