AR-285 (serv.man11). AR280 285 335 Service Manual-Settings and Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 25

3) Remove the ADF/RADF top cover, and set the DIP switch on the

control PWB to the desired test mode. While pressing the push
switch ON, turn on the power of the machine. 

(With the above operation, the machine enters the test mode.)

4) Turn on the push switch on the control PWB.

(Test operation is started.)

(To switch to another test mode, set the DIP switch on the control
PWB to the desired test mode, and open/close the ADF/RADF paper
feed section cover (microswitch FGOS it turned OFF and ON).

•

DIP switch 3 meaning

ON

OFF

DIP switch 3

For AB series

For inch series

•

Kinds of test modes and setting of DIP switch

No.

Test mode name

DIP switch

a

Single paper pass mode

All OFF

b

Duplex paper pass mode (AR-RF1
only)

1 ON,
the others OFF

c

Single aging mode

1, 3 ON,
2, 4, 5 OFF

d

Duplex aging mode (AR-RF1 only)

4 ON,
the others OFF

e

Load check mode

1, 5 ON,
2, 3, 4, OFF

f

EEPROM initializing mode + all
sensors adjustment mode

3, 5 ON,
1, 2, 4, OFF

g

Resist sensor adjustment mode

4, 5 ON,
1, 2, 3, OFF

h

Timing sensor adjustment mode

1, 4, 5, ON,
2, 3, OFF

i

Paper exit sensor adjustment mode
(AR-RF1 only)

3, 4, 5, ON,
1, 2, OFF

When documents are set on the paper feed tray, the document feed
LED lights up. When the push switch is pressed, all documents on
the paper feed tray are fed.

…

…

When documents are set on the paper feed tray, the document feed
LED lights up. When the push switch is pressed, all documents on
the paper feed tray are fed.

When the push switch is pressed, aging is started. The operation
timing is made by detection of each document size on the tray.  

…

…

When the push switch is pressed, aging is started. The operation
timing is made by detection of each document size on the tray.  

<AR-RF1>

Every time when the push switch is pressed, the operation is per-
formed in the sequence of 1) 

∼

 21)

  1) Ready LED OFF/Document remain LED OFF

  2) Flapper solenoid ON, wait shutter solenoid OFF

 3) Flapper solenoid OFF

  4) Ready LED ONN/Document remain LED OFF 

 5) Ready LED ON/Document remain LED ON, wait shutter sole-

noid ON + Paper feed motor normal rotation 250mm/s (prelimi-
nary paper feed operation)

  6) Ready LED OFF/Document remain OFF, paper feed motor OFF

  7) Ready LED ON/Document LED ON, paper feed motor reverse

drive 250mm/s (two-step extending operation)

  8) Ready LED OFF/Document remain LED OFF, paper feed motor

OFF

  9) Ready LED ON/Document LED ON, paper feed motor reverse

drive 800mm/s (paper feed operation) 

10) Ready LED OFF/Document remain LED OFF, paper feed motor

OFF

11) Ready LED ON/Document LED ON, transport motor normal

drive 800mm/s

12) Ready LED OFF/Document remain LED OFF, transport motor

OFF

13) Ready LED ON/Document LED ON, transport motor reverse

drive 800mm/s

14) Ready LED OFF/Document remain LED OFF, transport motor

OFF

15) Ready LED ON/Document LED ON, reverse motor normal drive

800mm/s (reverse operation)

16) Ready LED OFF/Document remain LED OFF, reverse motor

OFF

17) Ready LED ON/Document LED ON, reverse motor normal drive

800mm/s (paper exit operation)

18) Reverse motor normal rotation speed change 800 

→

 300mm/s

(paper exit speed reduction)

19) Ready LED OFF/Document remain LED OFF, reverse motor

OFF

20) Ready LED ON/Document LED ON, reverse motor normal drive

300mm/s (paper exit speed reduction)

21) Ready LED OFF/Document remain LED OFF, reverse motor

OFF

Return to 1).

<AR-AF1>

Every time when the push switch is pressed, the operation is per-
formed in the sequence of 1) - 24).

  1) Ready LED ON/Document LED ON, wait shutter solenoid ON

  2) Ready LED OFF/Document remain LED OFF, wait shutter sole-

noid OFF

  3) Ready LED ON/Document LED ON, wait shutter solenoid ON +

paper feed motor normal drive 250mm/s (preliminary paper feed
operation)

  4) Ready LED OFF/Document remain LED OFF, wait shutter sole-

noid OFF + paper feed motor OFF

  5) Ready LED ON/Document LED ON, paper feed motor reverse

drive 250mm/s

  6) Ready LED OFF/Document remain LED OFF, paper feed motor

OFF

DIP switch

Control PWB (Back)

Push switch

7 – 23