Sharp AR-CF2 Service Manual page 16

[7] TROUBLESHOOTING
Problem The inserter does not perform at all when the main
switch of the main unit is turned ON.
Case1 Cause Loose contact with the main unit
Check and Check that each connector is firmly
remedy connected.
Case2 Cause Loose contact of the connector terminal of
the wire (interface harness) connecting
with the main unit
Check and Check continuity in between the
remedy connector terminals. Replace the
connection wire if no continuity is
measured
Case3 Cause JAM cover open/close switch fault
Check and Check continuity between the switch
remedy contacts., Replace the contacts if no
continuity is measured.
Case4 Cause Controller PCB fault
Check and Check that 24 V DC and 5 V DC are
remedy supplied from the main unit after the
above cases 1 to 3 are confirmed. If 24 V
and 5 V are not present at CN1-2 pin and
IC5-32 pin on the PCB, replace the
controller PCB.
Problem The paper feed motor does not operate.
The reverse motor does not operate.
The horizontal transport motor does not operate.
Case1 Cause Loose contact of the motor connector
terminal
Check and Check continuity of the connector
remedy contacts.(CN1 to 3)
Case2 Cause Disconnection of the motor coil
Check and Check continuity between the connector
remedy terminals. Replace the connection wire if
no continuity is measured.
Case3 Cause Controller PCB fault
Check and If the motor does not operate in the motor
remedy single operation mode, replace the
controller PCB.
Problem The paper is delivered without being reversed in
the reverse paper feed mode.
Case1 Cause Connector terminal fault of the reverse
solenoid
Check and Check continuity of the connector
remedy contact.(CN4)
Case2 Cause Disconnection of the solenoid coil
Check and Inspect the coil for continuity. Replace the
remedy coil if no continuity is measured.
Case3 Cause Controller PCB fault
Check and If the solenoid does not perform in the
remedy solenoid single operation mode, replace
the controller PCB.
Problem
Case1
Case2
Case3
Case4
Case5
Case6
Case7
Problem
Case1
Case2
AR-CF2 TROUBLESHOOTING 7 - 1
Paper jam is displayed on the system display.
Cause Paper jam
Check and Visual observation. Take out paper jams.
remedy
Cause Reverse sensor fault
Check and Measure a voltage of TP2 on the
remedy controller PCB and check that 3 to 3.6 V
is observed when no paper is stacked,
and that 1.5 V or less is observed when
paper is stacked. Replace the sensor if
the measured voltage exceeds these
ranges.
Cause Paper exit sensor fault
Check and Measure a voltage of TP7 on the
remedy controller PCB and check that 5 V is
observed when no paper is stacked, and
that 1 V or less is observed when paper is
stacked. Replace the sensor if the
measured voltage exceeds these ranges.
Cause Empty sensor fault
Check and Measure a voltage of TP4 on the
remedy controller PCB and check that 1 V or less
is observed when no paper is stacked,
and that 5 V is observed when paper is
stacked. Replace the sensor if the
measured voltage exceeds these ranges.
Cause Registration sensor fault
Check and Measure a voltage of TP5 on the
remedy controller PCB and check that 5 V is
observed when no paper is stacked, and
that 1 V or less is observed when paper is
stacked. Replace the sensor if the
measured voltage exceeds these ranges.
Cause Timing sensor fault
Check and Measure a voltage of TP6 on the
remedy controller PCB and check that a 5 V is
observed when no paper is stacked, and
that 1 V or less is observed when paper is
stacked. Replace the sensor if the
measured voltage exceeds these ranges.
Cause Controller PCB fault
Check and If the problem is not solved with the
remedy sensors whose level changes when each
is turned ON/OFF, replace the controller
PCB.
The machine does not detect the paper.
Cause Tray sensor fault
Check and Measure a voltage of TP13 on the
remedy controller PCB and check thatV is
observed when no paper is stacked, and
that 1 V or less is observed when paper is
stacked. Replace the sensor if the
measured voltage exceeds these ranges.
Cause Controller PCB fault
Check and If the problem is not solved with a change
remedy in the sensor level after the above case 1
is confirmed, replace the controller PCB.