AR-FN2 (serv.man10). ARFN2 Service Manual-Circuit Descriptions - Sharp Copying Equipment Service Manual (repair manual). Page 6

AS is the sensor same as the transport entry port sensor (PIS). 
The document presence on the tray is detected by the lever-system actuator. The light path is interrupted when paper presence. 
The signal is passed to the CPU (IC9-18 pin) through the noise filter of R5 and C7. 
Logic of the signal inputted to the CPU: Paper presence 

®

 H, Paper empty 

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 L

R38 is the current limiting resistor of LED. R49 is the sensor load resistor. 

BRS is the sensor same as the transport entry port sensor (PIS). 
The boomerang rotation and home position are detected by the slit plate. The light path is interrupted when in the home position. 
The signal is passed to the CPU (IC9-60 pin) through the noise filter of R16 and C19. 
Logic of the signal inputted to the CPU: Home position 

®

 H, Rotating 

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 L

R48 is the current limiting resistor of LED. R70 is the sensor load resistor. 

TMMRS is the sensor same as the transport entry port sensor (PIS). 
The rotation of the motor which lifts up and down the tray is detected. Since the encoder is used as the slit plate, pulses are detected during
rotation.
The signal is passed to the G/A (IC5-40 pin) through the noise filter of R2 and C4. 
Logic of the signal inputted to the G/A: Light path interrupted 

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 H, Light path not interrupted 

®

 L

R37 is the current limiting resistor of LED. R50 is the sensor load resistor. 

Accumulation tray sensor input circuit

Accumulation tray
sensor
(AS)

Boomerang rotation sensor input circuit

Boomerang rotation
sensor
(BRS)

Tray rotation sensor
(TMMRS)

Tray rotation sensor input circuit

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