Thiele 00900383, Manual

Page: 89 / 92

82
R
eliant
3700 M
anual
Problem Solution
Feeder Will Not Cycle: Test-
ing the Trigger and/or Cycle
Button Inputs
The terms “flight sensor” and
“trigger sensor” are synony-
mous.
Power must be on during the
following tests. Exercise cau-
tion.
The following steps assume
the output of the DC power
supply is working and both 5
and 12 volts are present at the
CPU and Expansion Board
input connectors. If not, see
section titled “Fan does not
operate/Testing DC power
supply.”
The following steps assume
the blinking green “heartbeat”
LED is present on the CPU
board. If not, see section titled
“CPU board ‘heartbeat’ pulse
not present”.
The following steps assume
the drive board green LED is
illuminated and the red LED is
NOT illuminated. If this is not
true, see section titled “drive
board red LED illuminated.”
Also, the following steps as-
sume the drive output pins test
good. See the section titled
“Testing stepper motor drive
board output pins.”
The Trigger Input
1. Verify the flight or trigger sensor’s power-on green LED is illuminated. Is the green
LED illuminated?
a. Yes: Go to step 2.
b. No: Go to step 3.
2. Verify the trigger sensor’s yellow LED sensing indicator illuminates when the
sensor is covered, and goes dark when the sensor is uncovered. Is the yellow
LED illuminated when the trigger sensor is covered, and dark when the sensor is
covered?
a. Yes: Go to step 3.
b. No: Go to step 4.
3. Remove the trigger sensor wire harness from CPU connector J5 and measure for
the presence of 12VDC across pins 1 and 3 of connector J5 on the board. Is the
voltage present?
a. Yes: Go to step 4.
b. No: Go to step 5.
4. Test trigger sensor input. Using a small metal blade screwdriver, short pins 1 and
2 together on CPU board connector J5. Does the feeder trigger?
a. Yes: The trigger sensor input on the CPU board is good. Repair faulty trigger
sensor wire harness and/or replace trigger sensor.
b. No: Go to step 5.
5. Replace Reliant Control Assembly.
6. Replace ROM chip.
The Cycle Button Input
1. Remove the cycle button wiring harness connector from the Expansion Board at
Connector J4.
2. Using a piece of wire, carefully short pin 2 to pin 5 of connector J4 on the Expan-
sion Board. Shorting these two pins together should cause the feeder to run.
Does the feeder cycle when the pins are shorted to one another?
a. Yes: The cycle button input on the Expansion Board is good. Repair faulty
cycle button wire harness and/or replace cycle button.
b. No: Go to step 3.
3. Replace Reliant Control Assembly.
4. Replace ROM chip.