Sharp SF-A57 Service Manual page 7

E. Sensors, switches, detectors
Code Name
DFD Original feed sensor
DTD Original timing sensor
RDD Reverse sensor
DES Paper exit sensor
DED Original end sensor
DWVR Original width volume
DLS1 Original length sensor 1
DLS2 Original length sensor 2
DSS Original set sensor
DFMRS Paper feed motor rotation sensor
DWS Original width sensor
AUOD ADF open/close sensor
FGOD Paper feed guide switch
TGOD Reverse guide switch
DED
DSS
AUOD
DFMRS
FGOD
DWS
DFD
DTD
Type
Reflection sensor Turns HIGH when the original lead edge
is fed just in front of the resist roller.
Reflection sensor Turns HIGH when the original lead edge
is transported from the paper feed section
to the vicinity of the transport belt.
Reflection sensor Turns HIGH when the original lead edge
is transported to the reverse/paper exit
path.
Photo interrupter Turns HIGH when the original lead edge
is transported to the paper exit path
Photo interrupter Final paper detection on the tray
Slide volume Original width detection on the tray by the
voltage of volume
Photo interrupter Original length detection on the tray
Photo interrupter Original length detection on the tray (Inch
series only)
Photo interrupter Original detection on the tray
Photo interrupter Paper feed motor rotation detection
Photo interrupter Original width detection
Microswitch ADF unit open/close detection
Microswitch Paper feed cover open/close detection
Microswitch Reverse cover open/close detection
DLS1
TGOD (SF-A57 only)
RDD (SF-A57)
DES (SF-A18)
DWVR
Functions and operations
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Contact/output
HIGH when the original is
sensed.
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.
HIGH when the original is
sensed.
HIGH when the original is
sensed.
Pulse output
LOW when the original is
sensed.
LOW when closed.
LOW when closed.
LOW when closed.