Sharp MX-CF10 Service Manual page 18

Digital copier/printer/ multifunctional system option inserter
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Problem
Tray alarm is displayed on the system display.
Case1
Cause
Sub-tray pulling detection sensor fault
Check and
Measure a voltage on TP14 on the
remedy
controller PCB and check that 5 V is
observed when the sub-tray is in place,
and that 1 V or less is observed when the
sub-tray is pulled out. Replace the sensor
if the measured voltage exceeds these
ranges.
Case2
Cause
Sub-tray pulling detection sensor fault
Check and
Measure a voltage of TP15 on the
remedy
controller PCB and check that 5 V is
observed when the tray is in place, and
that 1 V or less is observed when the tray
is pulled. Replace the sensor if the
measured voltage exceeds these ranges.
Case3
Cause
Controller PCB fault
Check and
If the problem is not solved by a change in
remedy
the sensor level after the above cases 1
and 2 are confirmed, replace the
controller PCB.
Problem
Cover open is displayed on the system display.
Case1
Cause
Inserter cover open/close switch fault
Check and
Check continuity between the switch
remedy
contacts., Replace the switch if no
conduction is measured.
Case2
Cause
Inserter reverse unit open/close sensor
fault
Check and
Measure a voltage of TP9 on the
remedy
controller PCB and check that 1 V or less
is observed when the reverse unit is
open, and that 5 V is observed when the
reverse unit is closed. Replace the sensor
if the measured voltage exceeds these
ranges.
Case3
Cause
Inserter stand cover open/close sensor
fault
Check and
Measure the voltage of TP10 on the
remedy
control PWB and check that it is 1V or
less when the base cover is opened and
5V when closed.
If the voltage is outside the above
specifications, replace the sensor with a
new one.
Case4
Cause
Controller PCB fault
Check and
If the problem is not solved by a change in
remedy
the sensor level after the above cases 1
to 3 are confirmed, replace the controller
PCB.
Problem
Inserter unset is displayed on the system display.
Case1
Cause
Inserter set sensor fault
Check and
Measure a voltage of TP16 on the
remedy
controller PCB and check that 5 V is
observed when the inserter is set, and
that 1 V or less is observed when the
inserter is not set. Replace the sensor if
the measured voltage exceeds these
ranges.
Case2
Cause
Controller PCB fault
Check and
If the problem is not solved by a change
remedy
in the sensor level after the above case 1
is confirmed, replace the controller PCB.
Problem
Case1
Case2
Case3
MX-CF10 TROUBLESHOOTING 8 - 2
The inserter registration clutch does not perform.
Cause
Loose contact of the clutch connector
terminal
Check and
Check continuity of the connector
remedy
contacts. (CN4)
Cause
Disconnection of the clutch coils
Check and
Inspect the coils for continuity. Replace
remedy
the coils if no continuity is measured.
Cause
Controller PCB fault
Check and
If the clutch does not perform in the clutch
remedy
single operation mode, replace the
controller PCB.

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