Thiele 00900383, Руководство пользователя

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79
R
eliant
3700 M
anual
1. Refer to the DC power supply board diagram. Remove 6-pin DC wiring harness
connector from output of DC supply. Measure the supply’s output pins for the pres-
ence of DC power.
a. If voltages are not present, verify AC power is being applied to AC input.
b. Also check the fuse on the supply’s AC input. If the fuse is bad, and replacing it
causes fuse failure to occur again, replace the supply.
c. If the fuse is good, AC power is being applied, and DC power cannot be mea-
sured, replace supply.
2. Verify good electrical connections to pins in DC wiring harness 6-pin quick discon-
nect plug. Reconnect harness.
3. Check for shorted wires in the DC wiring harness on output of supply. A short will
cause the supply to shut down. The power supply should operate normally after the
short is removed.
4. Test DC wire harness 4-pin plug in connectors to the CPU and Expansion Boards
for the presence of 5 and 12 volts DC.
5. Test wire harness to fan quick-disconnect plug for the presence of 12VDC.
6. Replace fan.
1. Two LEDs are located on the CPU board. The “heartbeat” LED is the green LED.
The green LED should blink at regular intervals under normal operation when the
feeder is powered on. Make sure the front safety shield is closed completely, and no
error conditions are present.
2. Check output of DC power supply. See section titled “Fan does not operate/Testing
DC power supply.”
3. Verify ribbon cable integrity between CPU board and Expansion Board.
4. Check that the ROM and RAM chips are seated properly in their sockets. Improperly
seated chips may cause the CPU board to indicate a problem by illuminating the red
LED located next to the green “heartbeat” LED. The red LED should not illuminate.
5. Replace Reliant Control Assembly.
6. Replace ROM chip.
Fan does not operate/Test-
ing DC power supply
The DC supply has dual out-
puts: 5 and 12 volts DC.
When the output is shorted, a
faintly audible clicking sound
can be heard coming from
the supply. This is the power
supply protecting itself from
failure due to a short on its
output.
Continued operation of the
machine without the cool-
ing fan working properly will
cause further damage to the
internal electronic compo-
nents.
CPU board “heartbeat”
pulse not present
Problem Solution