AR-FN2 (serv.man3). ARFN2 Service Manual-External View and Internal Structure - Sharp Copying Equipment Service Manual (repair manual). Page 5

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4. Sensors, switches
No.
Code
Name
Type
Function, operation
Contact, output
1
JTES
Process tray paper
exit sensor
Photo interrupter
HIGH when the paper lead edge is transported
to the process tray tip.
HIGH when paper is
detected.
2
BRS
Boomerang rotation
sensor
Photo interrupter
HIGH when the boomerang is rotating in the
accumulation tray exit section.
HIGH when the
boomerang is rotating.
3
PIS
Transport inlet sensor
Photo interrupter
HIGH when the paper lead edge is sent to the
finisher.
HIGH when paper is
detected.
4
BES
Bundle exit sensor
Photo interrupter
Detection of paper on the process tray
HIGH when paper is
detected.
5
SBHPS
Paper alignment plate
home position sensor
Photo interrupter
Detection of the home position of the alignment
plate on the process tray
HIGH when stopping at
the home position.
6
FSS
Full stack sensor
Photo interrupter
Accumulation tray full detection
HIGH when paper is full.
7
TMMRS
Tray rotation sensor
Photo interrupter
Tray lift motor rotation detection
Pulse output
8
PLS
Paper level sensor
Photo interrupter
Paper level detection in the accumulation tray
HIGH when paper is
detected.
9
AS
Accumulation tray
sensor
Photo interrupter
Paper presence detection i the accumulation
tray 
LOW when paper is
detected.
10
UCS
Upper cover sensor
Photo interrupter
Upper transport path cover open/close
detection
LOW when closed.
11
ULS1
Unit lock sensor 1
Photo interrupter
Lock detection with the copier (Rear side)
LOW when locked.
12
ULS2
Unit lock sensor 2
Photo interrupter
Lock detection with the copier (Front side)
LOW when locked.
13
TLS
Tray limit sensor
Photo interrupter
Accumulation tray lower limit detection
HIGH when the lower
limit is detected.
14
PRS
Paper reverse sensor
Transmission sensor
HIGH when paper is fed in front of the fixed
tray.
LOW when paper is
detected.
15
SSW
Set switch
Micro switch
Lower transport path cover open/close
detection
LOW when closed.
16
CSW
Cover switch
Micro switch
Stapler cover open/close detection
LOW when closed.
1. JTES
2. BRS
3. PIS
4. BES
5. SBHPS
6. FSS
7. TMMRS
8. PLS
9. AS
10. UCS
11. ULS1
12. ULS2
13. TLS
14. PRS
15. SSW
16. CSW
4 – 3
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