Lincoln Series 1200, Series 1000 service manual

	Time display inaccurate	Perform all checks as in the above evaluation. If
	erratic, or inoperative	the time check is okay, refer to the next section
		optical encoder.
	Optical Encoder	The above time/temp test should have already
		been performed. Remove dust cover from the
		gearmotor and inspect the coupling and encoder
		disc. The coupling set screws should be tight and
		not slipping on the motor shaft or the tach.
		generator shaft. The encoder disc should be firmly
		attached to the coupling and not warped. Check the
		positioning of the optical encoder disc. The disc
		should not be touching the optical encoder
		assembly and the encoder assembly should be
		mounted so it is squarely facing the coupling shaft.
		This is to allow the infrared beams to be broken by
		the encoder disc. If all this is okay, then replace the
		optical encoder assembly.
Time Display		Perform all checks as in the above evaluation. If
inaccurate, erratic, or		the time check is okay, refer to the next section.
inoperative(S/N	Conveyor Drive (Stepper)	Check to see if the conveyor drive (stepper) motor
Q19078 & Above1000	Control	is running. If motor is not running, refer to
Series) (S/N Q14791 &		"Conveyor will not run" on page 43.
Above1200 Series)	Magnet	Check to insure that the magnet (cemented to shaft
		of conveyor drive (stepper) motor) has not been
		damaged, or come loose from motor shaft. Replace
		as needed.
	Hall Effect Sensor	Check for any physical damage to Hall Effect
		sensor (mounted on conveyor drive(stepper)
		motor). Check all wiring and connections for
		damage.
	Conveyor Drive (Stepper)	Check all connections for tightness or proper
	Control	location and check all wiring for visible damage.
		Replace as needed. If there is still no time display,
		wire in (temporarily) a new conveyor drive control.
		If there is still no time display, reconnect original
		conveyor drive control. Replace Hall Effect Sensor.

Impinger I -–1000 Series Service Manual - International 45