Checking The Sensitivity Level Of The Transmission Sensor - Sharp AR-FN8 Service Manual

CHAPTER 7 TROUBLESHOOTING
3) Set bits 7 and 8 on DIPSW3 on the fin-
isher controller PCB to match the number
of punch holes of the attached puncher unit
according to Table 7-102.
Number of Punch Holes
2-hole (AR-PN2A)
2- 3-hole (AR-PN2B)
4-hole (AR-PN2C)
4-hole (AR-PN2D)
Table 7-102
4) Press SW1 on the finisher controller PCB.
Press SW2 when setting a 2- 3-hole model
(AR-PN2B). Pressing this switch registers
the number of punch holes to the punch
driver PCB.
5) Set all bits on DIPSW3 to OFF.
3. Checking the sensitivity level of the
transmission sensor
How dirty the transmission sensor
(photosensor PCB LED PCB) is, can be
checked by the number of times that LED1 on
the finisher controller PCB lights. For this rea-
son, how dirty the transmission sensor is serves
as a guide for when to perform cleaning dur-
ing periodic maintenance.
1) Remove the rear cover of the finisher unit.
2) Set bits 1 through 6 of DIPSW3 on the fin-
isher controller PCB as indicated.
Figure 7-111
7-6
DIPSW3 bit
settings
bit 7 bit 8
OFF OFF
OFF ON
ON OFF
ON ON
5 6 7 8
3) Press SW1 on the finisher controller PCB.
Pressing this switch lights LED1 on the
finisher controller PCB as indicated in
Table 7-103 so that you can check the sen-
sitivity level of the transmission sensor.
Sensitivity Level
Sensor not dirty
Sensor slightly dirty
Sensor dirty
Table 7-103
4) Set all bits of DIPSW3 to OFF.
Number of LED
Lightings
Lit 1X
Lit 2X
Lit 3X