Sharp service manual Pcb, AR-CF2 Troubleshooting 8

[8] 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		Paper jam is displayed on the system display.
	Case1	Cause	Paper jam
		Check and	Visual observation. Take out paper jams.
		remedy
	Case2	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.
	Case3	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.
	Case4	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.
	Case5	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.
	Case6	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.
	Case7	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.

Problem		The machine does not detect the paper.
	Case1	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.
	Case2	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.

AR-CF2 TROUBLESHOOTING 8 - 1