Sharp SF-A55 Service Manual page 7

E. Sensors, switches, detectors
Code Name
DFD Original feed sensor
DTD Original timing sensor
DED1 Original end sensor 1
DED2 Original end sensor 2
RDD Original reverse sensor
DSD Original set detector
DWS Original width sensor
DFMRS Paper feed motor
rotation sensor
DTMRS Transport motor
rotation sensor
DLS1 Original length sensor 1
DLS2 Original length sensor 2
DWS1 Original width switch 1
DWS2 Original width switch 2
DWS3 Original width switch 3
DWS4 Original width switch 4
AUOD ADF open/close switch
FGOD Paper feed guide
open/close switch
TGOD Reverse guide
open/close switch
DWS4
DWS3
AUOD
DWS2
DWS1
DFMRS
DED2
DSD
DWS
DFD
DTD
Type
Reflection sensor Turns HIGH when the original lead edge is fed
just in front of the resist roller.
Reflection sensor HIGH when the original lead edge is
transported from the paper feed section to the
vicinity of the transport belt.
Photo interrupter Final paper sensor 1 on the tray
Reflection sensor Final paper sensor 2 on the tray (AB series)
Reflection sensor Turns HIGH when the original lead edge is
transported to the reverse/paper exit path.
Photo interrupter Detects an original on the tray.
Photo interrupter Senses the original width.
Photo interrupter Senses the paper feed motor rotations.
Photo interrupter Senses the transport motor rotations.
Photo interrupter Senses the original length on the tray.
Photo interrupter Senses the original length on the tray. (Inch
series only)
Lead switch Senses the original width on the tray. (11",
297mm)
Lead switch Senses the original width on the tray. (257mm,
AB series only)
Lead switch Senses the original width on the tray. (8 1/2"
210mm)
Lead switch Senses the original width on the tray. )182mm,
AB series only)
Microswitch Senses the ADF unit open/close.
Microswitch Senses the paper feed cover open/close.
Microswitch Senses the reverse cover open/close.
DTMRS
DLS2
DLS1
DED1
RDD
TGOD
FGOD
Function, operation
– 6 –
Contact, output
HIGH when the original is
sensed.
HIGH when the original is
detected.
HIGH when the original is
sensed.
HIGH when the original is
sensed.
HIGH when the original is
sensed.
LOW when the original is
sensed.
HIGH when the original is
sensed.
Pulse output
Pulse output
HIGH when the original is
sensed.
HIGH when the original is
sensed.
ON when detected.
ON when detected.
ON when detected.
ON when detected.
Close when closed.
Close when closed.
Close when closed.