Belshaw Brothers TG 50 manual 3000481 & Above

Conveyor will not run	Fan Switch	WITH POWER OFF: Check continuity between switch
(S/N 3000481 & Above)		terminals. Check and insure good wire connections.
	Conveyor Control	With the fan switch on, check for supply voltage at the
	Transformer	primary of the transformer. Check for voltage on the
		secondary side of transformer (24 VAC) at J4 and J5 on
		the conveyor control board. Replace as needed.
	Speed Adjustment Pot	This is a 50 K ohm potentiometer. WITH POWER OFF:
		Remove the leads from the motor control board at
		terminals P1, P2, P3. With a digital meter, check the
		ohm reading across the red and black leads. This
		reading should be 50K ohms (± 10%) as the pot. is
		rotated from low to high. Place meter leads on red and
		white lead. Rotating the pot. slowly from low to high, the
		meter reading should show an even transition from 0 to
		50 K ohms (±10%). There should be no dead or opens
		spots throughout the rotation of the pot. Check all three
		(3) leads to ground. There should be no continuity to
		ground. If any of the above checks fail, replace the pot.
	Conveyor Control	Check for 24 VAC input to the control board at terminals
	Board	J4 and J5. If not present, check wiring back to control
		transformer, if voltage is present at J4 and J5, check the
		VDC output at terminals J2 (+) & J3 (-) (0-18 VDC). If
		24 VAC is present at J4 and J5, but VDC is not present
		at J2(+) & J3(-) replace board.
	Conveyor Gear Motor	If D.C. voltage is present at J2(+) and J3(-) and the
		motor does not run, first check the mini breaker (.7Amp).
		Check the leads to the motor for evidence of any shorts
		or opens, and each lead to ground. If the motor fails the
		above tests, replace motor.
	Conveyor	Check for any mechanical misalignment or improper
		adjustment, also check for worn bearings. A conveyor
		belt that is too tight will cause excessive bearing wear
		and sometimes, irregular speed.
Conveyor speed	Power Supply	Check for steady supply voltage to oven. If voltage is
varying or intermittent		unsteady, contact Power Company.
	Transformer	Check for steady AC voltage output from transformer
		and replace as needed.
	Conveyor Control	Check for steady D.C. voltage output from conveyor
		control. If D.C. voltage output is unsteady, check
		conveyor potentiometer (See Speed Adjustment
		Potentiometer" under Conveyor will not run). If the
		potentiometer checks good, and the D.C. voltage is
		unsteady, replace conveyor control.
	D.C. Gearmotor	Check motor brushes for excessive arching and/or
		unusual wear. Replace brushes or gearmotor as
		needed
	Magnet	Check to insure that the magnet (cemented to shaft of
		conveyor drive 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 motor). Check all wiring and
		connections or damage. Check all connections for
		tightness or proper location and check all wiring or
		visible damage. Replace as needed.

November 1999 34 COUNTER TOP IMPINGER