Sharp SF-A57 Service Manual page 27

I. Originals cannot be reversed.
(Common to SF-A18/A57)
H
Is the roller in
the reversing section
free from paper dust
or dirt ?
YES
Does the
NO
reversing roller
rotate ?
YES
Does the
NO
solenoid operate
properly ?
YES
Is the
NO
reversing sensor
output normal ?
YES
Replace the control
PWB.
Adjust the mechanism load
NO
and the drive system and
remove foreign materials.
C
F
D
J. Paper jam (SF-A18 only)
I
Is the
machine free from
paper jam ?
YES
Is the
original feed sensor
(DFD) normal ?
YES
Is the
original width sensor
(DWS) normal ?
YES
Is the
paper exit sensor
(DES) normal ?
YES
Is the
original timing sensor
(DTD) normal ?
YES
Replace the control
PWB.
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NO Visually check and
remove the paper jam.
NO
D
NO
E
NO
F
NO
D