MX-RP20. Service Manual for RP20N. - Sharp Copying Equipment Service Manual (repair manual). Page 16

MX-RP

20 N  OPERATIONAL DESCRIPTIONS  6 – 2

The motor is turned ON and the power of the paper feed clutch is
transmitted to the pickup roller and the paper feed roller.

The pickup roller descends to pickup the top document and feed it
to the paper feed roller.

The paper feed roller feeds a document to the transport section.

At that time, the document is separated by the separation roller to
prevent double-feeding.

The lead edge of the fed document is aligned (registration) by the
registration roller, and passed through transport roller 1 to the doc-
ument scanning section, where images are scanned.

Then the document is passed through transport roller 2 to the
paper exit roller.

The paper exit roller (drive pulley) is separated by the paper exit
roller pressure control solenoid.

When the read edge of the document passes the scanning section,
the both rollers are brought into close contact to supply the power
for paper exit.

1)

Document set (Document empty sensor ON)

2)

Paper feed start (1st sheet)

The pick-up roller descends. (The paper feed motor is booted.)

(The paper feed clutch is ON)

3)

Registration operation (1st sheet)

(Registration clutch ON)

(When a certain time passes after turning ON the registration
clutch, the paper feed clutch is turned OFF.)

4)

Scanning start (1st sheet)

5)

Paper feed start (2nd sheet)

6)

Scanning complete (1st sheet)/Registration operation (2nd
sheet)

(When a certain time passes after turning ON the registration
clutch, the paper feed clutch is turned OFF.)

7)

Scanning start (2nd sheet)

8)

Paper exit complete (1st sheet)

9)

Scanning complete (2nd sheet)

10) Paper exit complete (2nd sheet)

11) Pick-up roller lifting up

(After completion of a job, the motor is rotated reversely at a
low speed for a certain time, the paper feed clutch is turned
ON and the pickup roller is lifted.)