AR-C260 (serv.man10). All Sections - Sharp Copying Equipment Service Manual (repair manual). Page 9

AR-C260/C260M  DESCRIPTIONS OF EACH SECTION  7 - 9

The transfer belt drive power is transmitted from the drive motor (BTM)
to the transfer drive roller. 

The motor (stepping motor) is driven by the drive signal sent from the
PCU.

According to the high voltage control signal from the PCU, the signal is
converted into a transfer high voltage control signal with the HV (MC)
PWB, and sent to the HV (TC) PWB. 

According to each color transfer high voltage control signal, a high volt-
age is applied to each transfer roller from the transfer high voltage HV
(TC) PWB through the connection spring to each transfer roller.

The process control shutter is provided on the process control sensor
of monochrome (PCSK) and color (PCSC). When the shutter is open
(in image density correction and automatic registration), the toner
patch formed on the transfer belt is read by the process control sensor,
and its information is sent to the PCU. 

When the shutter is closed, the calibration sheet is read to perform cal-
ibration of the sensor itself. 

The shutter operation is controlled by the calibration solenoid (CALS).

Toner scraped by the belt cleaning blade is transported to the waste
toner box by the belt waste toner transport shaft. 

When the waste toner box is full, the rotation load of the waste toner
transport shaft increases to turn on the waste toner full detection
switch with the lever by the torque limiter function.

In color print, the transfer belt is in contact with four OPC drums. In
black and white print, the transfer belt unit moves down so that only the
black OPC drum is in contact with the transfer belt. 

This up-and-down movement of the transfer belt is performed by the
lift-up motor (BLUM), the lift-up cam, and the unit position sensor
(BLUD). 

When the left cabinet is opened for jam process, the rotating mecha-
nism of the lift-up unit separates all four OPC drums from the transfer
belt.

• Transfer belt position for color print

The four OPC drums are in contact with the transfer belt by rotation
of the cam in the transfer lift-up unit.

• Transfer belt position for black print

Only the black OPC drum is in contact with the transfer belt by rota-
tion of the cam in the transfer lift-up unit.

• Transfer belt position in jam process or replacement of the transfer

belt
When the left cabinet is opened, the transfer lift-up unit moves down,
and the transfer unit moves by 9mm accordingly.

Drive to paadle by blum
Waste toner full detection 

→

 

1000 copies 

→

 without 24g reset

Y

M

C

K

Y

M

C

K

9mm

Y

M

C

K