MX-DEX8, MX-DEX9. Complete - Sharp Copying Equipment Service Manual (repair manual). Page 8

MX-DEX8/DEX9  OPERATIONAL DESCRIPTIONS  4 – 1

MXDEX9

Service Manual

 

After the tray has been inserted, the lift motor turns ON, and the tray is lifted to and stops at a position where it can feed paper with the upper
limit sensor (DLUD) turned ON. 
The lift-up motor output is as shown below: 

Paper feed operation can be performed if the tray is stationary at a position where it can feed paper (with the upper limit sensor [DLUD] being
ON) and there is paper in the tray. 
When paper feed takes place, the transport motor (DPFM), the transport clutch (DTRC), and the paper feed clutch (DPUC) operate in the tim-
ings shown in the diagrams below. 
In addition, there are times when the paper feeder speeds up paper feed by performing "turbo" paper feed in the desk so that it can meet the
CPM conditions required by the main unit. 

Start lift-up

Finish lift-up

DLUM

(motor output)

DLUD

(upper limit sensor)

Job start request received

Job end request

received

Preliminary paper feed request received

DPFM

(transport motor output)

DTRC

(transportclutch)

DPUC1

(paper feed clutch)

DPFD1

(transport sensor)

TRC

(mainunitsynchroni-

zationsignal)

Resist synchronization

Paper feed clutch

ON control

Paper feed clutch

OFF control

[Without "turbo" paper feed]

Job end request

received

Preliminary paper feed request received

Acceleration

Deceleration

Deceleration

Acceleration timing control

Resist synchronization

[With "turbo" paper feed]

Job start request received

DPFM

(transport motor output)

DTRC

(transport clutch)

DPUC1

(paper feed clutch)

DPFD1

(transport sensor)

TRC

(mainunit synchroni-

zation signal)

Paper feed clutch

OFF control

Paper feed clutch

ONcontrol

Deceleration timing

control