MX-6201N, MX-7001N (serv.man37). TRANSFER SECTION - Sharp Copying Equipment Service Manual (repair manual). Page 2

MX-7001N  TRANSFER SECTION  M – 2

In this section, a high voltage are applied to the primary transfer
roller, toner images on the OPC drum are transferred to the primary
transfer belt surface, toner images on the primary transfer belt are
transferred to paper by the secondary transfer belt.

The primary transfer roller performs all pressure contact, all sepa-
ration, and only black contact depending on the operation mode.
When the roller separation clutch (BLTCL) is turned ON, the trans-
fer cam rotates and the primary transfer link and the primary trans-
fer arm which is linked with the cam are shifted in the arrow
direction, performing separation of the roller.
All pressure contact

All separation

Only black contact

Also performs all pressure contact, all separation, and only black
contact by the roller separation sensor (TBLTC, TBLTB) and the
separation detection arm.
The primary transfer and the secondary transfer are driven together
with the black developing motor.

The primary transfer belt is separated by the developing driving
motor K (DVKM).
Except when a jam occurs, the primary transfer belt is in contact
with the OPC drum. (This is in order to protect the OPC drum.)

The secondary transfer belt is separated by the secondary transfer
separation drive motor (TURM).
Except when process control  is performed, the secondary transfer
belt is in contact with the primary transfer belt. (This is in order to
protect toner patches on the OPC drum.)

PTCM

PTC cleaner motor

Drives the PTC cleaner

PTCM_HP

Sensor inside the PTC unit

Detects home position of the PTC cleaner

TBLTB

Transfer belt separation sensor BK

Detects primary transfer separation (BK)

TBLTC

Transfer belt separation sensor CL

Detects primary transfer separation (CL)

THPS

Secondary transfer separation drive 
sensor

Detects secondary transfer separation

TURM

Secondary transfer separation drive motor

Drives separation operation of the secondary transfer

1

Primary transfer belt

Transfers toner on the OPC drum forms toner images on the belt.

2

Primary transfer drive roller

Drives primary transfer belt

3

Primary transfer follower roller

Drives primary transfer belt

4

Primary transfer roller

Transfers toner images on the OPC drum to the primary transfer belt

5

Y auxiliary roller

Retaining the belt position by separation of the Y primary transfer roller

6

Registration backup roller

Retaining the belt position in the process control and the registration section.

7

Cleaning brush

Cleans the back surface of the primary transfer belt

8

Transfer cleaning blade

Cleans the frontal surface of the primary transfer belt

9

Secondary transfer belt

Transfers toner images on the primary transfer belt to paper

10

Secondary belt dirve roller

Drives secondary transfer belt

11

Secondary belt follower roller

Drives secondary transfer belt

12

Secondary belt tension roller

Applies a proper tension to the secondary transfer belt

13

PTC unit

Imposes negative charges

14

PTC cleaner

Clean the PTC unit

DRUM

PTC

Y

M

C

K

Y

M

C

K

Y

M

C

K