7. Jam display
Field Service Ver. 1.0 Jun. 2008
DF-612/SP-503/MS-501
T
roubleshooting
7.4.4
Paper exit section misfeed
A. Detection timing
B. Action
7.4.5
Image reading section misfeed
A. Detection timing
B. Action
Type
Description
Detection of misfeed at
paper exit section
• The exit/turnover sensor (PS9) is not turned OFF after a lapse of pre-
defined time after the registration sensor (PS8) is turned OFF by the
passage of paper.
Relevant electrical parts
Registration sensor (PS8)
Exit/turnover sensor (PS9)
DF control board (DFCB)
Step
Action
WIRING DIAGRAM
Control signal
Location (Electrical
component)
1
Initial check items
—
—
2
PS8 I/O check, sensor check
DFCB CN5-10 (ON)
DF-612 F to G-5
3
PS9 I/O check, sensor check
DFCB CN6-4 (ON)
DF-612 F to G-5
4
Change DFCB
—
—
Type
Description
Short length misfeed
• The original being fed through the unit has a length shorter than the
shortest length of the original supported by the unit.
The paper deactivates the registration sensor (PS8) at timing earlier
than the end of a predetermined period of time after the sensor has
been activated.
Long length misfeed
• The original being fed through the unit has a length longer than the long-
est length of the original supported by the unit.
The paper does not deactivate the registration sensor (PS8) even after
the lapse of a predetermined period of time after the sensor has been
activated.
Relevant electrical parts
Registration sensor (PS8)
DF control board (DFCB)
Step
Action
WIRING DIAGRAM
Control signal
Location (Electrical
component)
1
Initial check items
—
—
2
PS8 I/O check, sensor check
DFCB CN5-10 (ON)
DF-612 F to G-5
3
Change DFCB
—
—
46
Service Manual Y109
850
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