Lincoln 1634-000-EA gear motor, and the motor does not run, first check, Conveyor speed varying

	gear motor	and the motor does not run, first check
		the mini breaker and then the conveyor.
		Refer to the next possible cause. Check
		the leads to the motor for evidence of
		any shorts or opens , and each lead to
		ground. Check motor brushes . From
		the top of the motor, rotate motor shaft
		to determine if there is a locked rotor
		or a locked gearbox (use care so magnet
		and Hall Effect sensor board are not
		damaged). Replace motor as needed.
	Conveyor	Check for any mechanical misalignment.
		Also, check for worn bearings.
		A conveyor belt that is over tightened
		will cause excessive bearing wear and
		sometimes, irregular speed.
Conveyor speed varying	Power supply	Check power supply at the D.C. control
or intermittent		board for supply voltage at board terminals
		L1 and L2.
	Motor control board	Place the test meter probes on terminals
		A+ and A-. (with speed potentiometer
		set to maximum speed – approximately
		2 min.). The meter reading should be
		approximately 100VDC(±3%), if
		voltage is not steady within limits,
		then the board is usually bad.
		Always check the speed potentiometer,
		be sure it is OK before changing a
		control board. This test is not always
		100% accurate as this test is not
		performed at operating speeds, However,
		this test is the best method currently
		available.
	D.C. Gearmotor	If the D.C. control board is steady,
		then the problem may be the motor or
		gearbox. Check the brushes in the
		motor for excessive arching or
		unusual wear. Check the motor and
		gearbox from instructions located on
		page 9 under “possible cause”
		listing “conveyor gear motor”
	Magnet	Check to insure that the magnet
		(cemented to shaft of conveyor drive
		motor) has not been damaged, or come
		loose from the motor shaft. Replace
		as needed.
	Hall Effect	Check for any physical damage to
	Sensor	hall effect sensor (mounted on
		conveyor drive motor). Check all
		wiring and connections for tightness
		and proper location. Replace as needed.
		Connect new hall effect to system
		and check for steady operation.
Temperature display	Display transformer	Measure the transformer primary
inoperative		for supply voltage input. If voltage is
		not present, trace wiring back to the
		fan relay. If voltage is present,
		measure the secondary output of the
		transformer. Voltage across terminals
		1-3 should be 12-15VAC. Terminals
		1-2 and 2-3 should be ½ the voltage
		reading from terminals 1-3. If the above
10	Low Profile – 1600 Advantage Series Service Manual – International