Troubleshooting
5-6
Part 1612500−02
E 2018 Nordson Corporation
Spray Gun Power Supply Resistance Test
Use a megohm meter to check the resistance of the power supply, from the
J2−3 feedback terminal at the connector to the contact pin inside the front
end. The resistance should be between 225−335 megohms. If the reading
is infinite, switch the meter probes. If the resistance falls outside this range,
replace the power supply.
NOTE: There are multiple variables that can affect the Meg−Ohm readings
of your meter (temperature and measurement voltage). If the Meg−Ohm
meter output voltage differs from the 500 V setting, it will have a direct
impact on the measurement accuracy. Measurements should also be taken
at room temperature 22
_
C or 72
_
F. Allow time for the multiplier to cool to
room temperature for repeatable results.
J2−3 (YELLOW)
FEEDBACK
J2−2 (BLACK)
COMMON
J2−1 (RED)
OSC
225-335 Megohms at 500 VDC
Figure 5-8 Power Supply Resistance Test
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