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Low Profile – 1600-000-A Advantage Series Service Manual – Domestic
8
Power Supply Check power supply at the DC control board for the 120 VAC
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 100 VDC
(±3%), if voltage is not steady within limits, then the board is
probably bad. Always check the speed pot., be sure it is okay
before changing a 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.
DC Gearmotor If the DC control board is steady then the problem may be the
motor or gearbox. Check the brushes in the motor for
excessive arching and/or unusual wear. Check the motor and
gearbox from instruction located 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 motor shaft. Replace as needed.
Conveyor speed
varying or intermittent
Hall Effect Sensor Check for any physical damage to hall effect sensor (mounted
on conveyor drive motor.) Check all wiring and connections
for damage. Check all connections for tightness or proper
location. Replace as needed. Connect new hall effect to
system and check for steady operation.