Read Sharp AR-FN2 (serv.man9) Service Manual online
2. Troubleshooting
Trouble
Cause
Troubleshooting and treatment
(1) When the main switch of
the copier is turned on,
it does not work at all.
it does not work at all.
1. Contact trouble with the copier
Check contact of each connector.
2. Contact trouble of the connector
pin of the connection wire with the
copier
copier
Make a conduction test between connectors and replace, if not
conducting.
conducting.
3. Stapler section cover switch, lower
transport path set switch trouble
Make a conduction test between switches, and replace if necessary.
4. Control PWB trouble
If DC24V and DC5V are inputted from the copier and LED on the control
PWB does not blink and 24V is ont supplied to CN8-1, replace the control
PWB.
PWB does not blink and 24V is ont supplied to CN8-1, replace the control
PWB.
(2) The transport motor
does not operate.
1. Motor connector pin contact trouble
·
Check contact of the connector, and repair if necessary.
·
Make a conduction test of connector pins and replace if not conducting.
(3) The reverse motor does
not operate.
2. Motor coil disconnection
Make a conduction test between coils and replace the motor if ont
conducting.
conducting.
(4) The alignment motor
does not operate.
3. Control PWB trouble
If the motor does not operate in the load operation mode, replace the
control PWB.
control PWB.
(5) The accumulation tray
motor does not operate.
(6) The boomerang
solenoid does not
operate.
operate.
1. Solenoid connector pin contact
trouble
·
Check contact of the connector, and repair if necessary.
·
Make a conduction test of connector pins, and replace if not
conducting.
conducting.
(7) The reverse solenoid
does not operate.
2. Solenoid coil disconnection
Make a conduction test between coils, and replace the solenoid if not
conducting.
conducting.
(8) The paddle solenoid
does not operate.
3. Control PWB trouble
If the solenoid does not operate in the load operation mode, replace the
control PWB.
control PWB.
(9) The copier display
shows "Finisher paper
jam."
jam."
1. Paper jam
Visually inspect and remove the jam.
2. Transport entry port sensor trouble
Measure the voltage at TP41 on the control PWB. If it is not 0V at sensor
OFF and 5V at ON, replace the transport path entry port sensor.
OFF and 5V at ON, replace the transport path entry port sensor.
3. Treatment tray exit sensor trouble
Measure the voltage at TP56 on the control PWB. If it is not 0V at sensor
OFF and 5V at ON, replace the treatment tray exit sensor.
OFF and 5V at ON, replace the treatment tray exit sensor.
4. Bundle exit sensor trouble
Measure the voltage at TP58 on the control PWB. If it is not 0V at sensor
OFF and 5V at ON, replace the bundle exit sensor.
OFF and 5V at ON, replace the bundle exit sensor.
5. Paper reverse sensor trouble
Measure the voltage at TP22 on the control PWB. If it is not 0V at sensor
OFF and 5V at ON, replace the paper reverse sensor.
OFF and 5V at ON, replace the paper reverse sensor.
6. Sensor connector pin contact
trouble
Make a conduction test of connector pins, and replace the pin if not
conducting.
conducting.
7. Control PWB trouble
When each sensor is turned on/off, the sensor level is changed but the
phenomenon is not changed, replace the control PWB.
phenomenon is not changed, replace the control PWB.
(10) The copier display
shows "Finisher not
connected."
connected."
1. Finisher not connected
Connect the finisher.
2. Unit lock sensor 1 trouble
Measure the voltage at TP20 on the control PWB. If it is not 0V at when
coupling and 5V when not coupling, replace the unit lock sensor 1.
coupling and 5V when not coupling, replace the unit lock sensor 1.
3. Unit lock sensor 2 trouble
Measure the voltage at TP46 on the control PWB. If it is not 0V when
coupling and 5V when not coupling, replace the unit lock sensor 2.
coupling and 5V when not coupling, replace the unit lock sensor 2.
6. Sensor connector pin contact
trouble
Make a conduction test of connector pins, and replace the pin if not
conducting.
conducting.
7. Control PWB trouble
When each sensor is turned on/off, the sensor level is changed but the
phenomenon is not changed, replace the control PWB.
phenomenon is not changed, replace the control PWB.
(11) The copier display
shows Finisher cover
open.
open.
1. Upper cover open
Visually inspect and remove the cover.
2. Upper cover sensor trouble
Measure the voltage at TP17 on the control PWB. If it is not 0V at sensor
OFF and 5V at ON, replace the transport path entry port sensor.
OFF and 5V at ON, replace the transport path entry port sensor.
3. Sensor connector pin contact
trouble
Make a conduction test of connector pins, and replace pins if not
conducting.
conducting.
4. Control PWB trouble
When each sensor is turned on/off, the sensor level is changed but the
phenomenon is not changed, replace the control PWB.
phenomenon is not changed, replace the control PWB.
(12) Paper is stopped
during exit operation
1. Boomerang rotation sensor trouble
Measure the voltage at TP59 on the control PWB. If it is not 0V at sensor
OFF and 5V at sensor ON, replace the transport path entry port sensor.
OFF and 5V at sensor ON, replace the transport path entry port sensor.
2. Paper alignment home position
sensor trouble
Measure the voltage at TP23 on the control PWB. If it is not 0V at sensor
oFF and 5V at ON, replace the transport path entry sensor.
oFF and 5V at ON, replace the transport path entry sensor.
3. Sensor connector pin contact
trouble
Make a conduction test of connector pins, and replace the pins if not
conducting.
conducting.
4. Control PWB trouble
When each sensor is turned on/off, the sensor level is changed but the
phenomenon is not changed, replace the control PWB.
phenomenon is not changed, replace the control PWB.
10 – 2
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