AR-RB1 (serv.man2). AR-RB1 Service Manual - Sharp Copying Equipment Service Manual (repair manual). Page 11

AR-RB1  DESCRIPTION OF OPERATION  4 - 4

As for the relation between the process speed and the transport speed
in RB1, refer to the table (3)-A.

Sensor input, motor output, solenoid output timing is as below.

Processing speed

The paper input motor and 
upper turnover motor are 
caused to turn in time with the 
copier processing speed, thus 
transporting the paper.

When the trailing edge of the paper 
reaches a point 13mm from the copier 
POD off, the transport speed in RB1 
is accelerated.

Trailing edge of paper reaches 
point 13mm from POD off

Transport speed

(high speed)

Transport speed 

(high speed)

When the trailing edge of the 
paper reaches the upper reverse 
stop point, the upper turnover 
motor and the lower turnover 
motor stop.

Motor stop 

(paper stop)

The upper turnover motor and the 
lower turnover motor are caused to 
revolve in the paper delivery direction, 
and the paper is discharged.

The lower reverse motor stops at 
BPPD1 off, when the trailing edge of the 
paper reaches a point 50mm before the 
delivery roller, the transport speed 
decreases.

Trailing edge of paper 

reaches point 50mm 
before delivery roller

After the trailing edge of the paper 
passes the delivery roller, the 
upper turnover motor stops.

Transport 

speed   

(low speed)

Lower 

turnover 

motor stop

Motor stop 

(discharge complete)

POD
(Paper exit 
sensor)

BPPD1
(Transport 
sensor 1)

BPRD
(Reverse section 
detection sensor)

BPOD
(Paper-out sensor)

BIM
(Paper-in motor)

BRM
(Upper reverse 
motor)

(Direction of paper-in)

(Direction of paper-out)

(Direction of paper-in)

(Direction of paper-out)

BTM
(Lower reverse 
motor)

BGSOL
(Gate solenoid)

Process speed

Process speed

High speed

High speed

High speed

High speed

Low speed