AR-335 (serv.man11). AR280 285 335 Service Manual-Settings and Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 26

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  7) Ready LED ON/Document LED ON, paper feed motor reverse
drive 831mm/s
  8) Ready LED OFF/Document remain LED OFF, paper feed motor
OFF
  9) Ready LED ON/Document LED ON, paper feed motor reverse
drive 831mm/s
10) Paper feed motor reverse rotation speed change 831 
 300mm/s
11) Ready LED OFF/Document remain LED OFF, paper feed motor
OFF
12) Ready LED ON/Document LED ON, transport motor normal
drive 831mm/s
13) Ready LED OFF/Document remain LED OFF, transport motor
OFF
14) Ready LED ON/Document LED ON, transport motor normal
drive 831mm/s
15) Transport motor normal rotation speed change 831 
 300mm/s
16) Ready LED OFF/Document remain LED OFF, transport motor
OFF
17) Ready LED ON/Document LED ON, transport motor normal
drive 831mm/s
18) Transport motor normal rotation speed change 831 
 300mm/s
19) Transport motor normal rotation speed change 300 
 831mm/s
20) Ready LED OFF/Document remain LED OFF, transport motor
OFF
21) Ready LED ON/Document LED ON, transport motor reverse
drive 208mm/s (switchback operation)
22) Ready LED OFF/Document remain LED OFF, transport motor
OFF
23) Ready LED ON/Document LED ON, paper exit motor normal
drive 300mm/s
24) Ready LED OFF/Document remain LED OFF, paper exit motor
OFF
Return to 1).
f. EEPROM initializing + all sensors adjustment mode
When the push switch is pressed, the EEPROM is initialized. At that
time, the LED blinks at the cycle of 100msec.
After completion of EEPROM initializing, the LED turns ON. In case of
an error in the EEPROM initializing, the LED blinks at the cycle of
2000msec.
Then all sensors adjustment is started. At that time, the document
remain LED blinks at the cycle of 100msec. After completion of all
sensors adjustment, the document remain LED turns ON. In case of
an. Error in the all sensors adjustment, the document remain LED
blinks at the cycle of 2000msec.
Only when the EEPROM is successfully completed, the all sensors
adjustment is performed. 
Kinds of JAM, error
LED display
EEPROM initializing
error
Ready LED blinks at the cycle of
2000msec.
All sensors adjustment
error
Document remain LED blinks at the
cycle of 2000msec
g. Resist sensor adjustment mode 
Set the DIP switch (4, 5 to ON, 1, 2, 3 to OFF) and press the push
switch. Each sensor adjustment is performed. At that time, the LED
blinks at the cycle of 100msec.  
After completion of the sensor adjustment, the LED turns ON. In case
of an error in the sensor adjustment, the LED blinks at the cycle of
100msec.
Kinds of JAM, error
LED display
Sensor adjustment
upper limit error
Document remain LED turns OFF.
Ready LED blinks at the cycle of
100msec.
Sensor adjustment lower
limit error
Document remain LED blinks at the
cycle of 100msec.
Ready LED turns OFF
This mode can be adjusted with SIM 53-2.
h. Timing sensor adjustment mode 
Set the DIP switch (1, 4, 5 to ON, 2, 3 to OFF) and press the push
switch. Each sensor adjustment is performed. At that time, the LED
blinks at the cycle of 100msec.  
After completion of the sensor adjustment, the LED turns ON. In case
of an error in the sensor adjustment, the LED blinks at the cycle of
100msec.
Kinds of JAM, error
LED display
Sensor adjustment
upper limit error
Document remain LED turns OFF.
Ready LED blinks at the cycle of
100msec.
Sensor adjustment lower
limit error
Document remain LED blinks at the
cycle of 100msec.
Ready LED turns OFF
This mode can be adjusted with SIM 53-2.
i. Paper exit sensor adjustment mode
Set the DIP switch (3, 4, 5 to ON, 1, 2 to OFF) and press the push
switch. Each sensor adjustment is performed. At that time, the LED
blinks at the cycle of 100msec.
After completion of the sensor adjustment, the LED turns ON. In case
of an error in the sensor adjustment, the LED blinks at the cycle of
100msec.
Kinds of JAM, error
LED display
Sensor adjustment
upper limit error
Document remain LED turns OFF.
Ready LED blinks at the cycle of
100msec.
Sensor adjustment lower
limit error
Document remain LED blinks at the
cycle of 100msec.
Ready LED turns OFF
This mode can be adjusted with SIM 53-2.
(4) Kinds of error (RADF single mode only)
Kinds of JAM, error
LED display
Not-reaching/remaining JAM in
the paper feed section
Document remain LED blinks at
the cycle of 1000msec.
Not-reaching/remaining JAM in
the paper exit section
Ready LED blinks at the cycle
of 1000msec.
Paper feed motor lock error
Document remain LED blinks at
the cycle of 2000msec.
Resist/timing sensor adjustment
error (when power is supplied)
Document remain LED blinks at
the cycle of 100msec.
Paper exit sensor adjustment
error (when power is supplied)
Ready LED blinks at the cycle
of 100msec.
A JAM/motor lock error can be canceled by opening/closing the ADF
after jam recovery process or by applying the power again. 
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