Archive – Ransburg 9040 Classic HV Power Supply 76447 User Manual

Page 25

CP-97-02.5

9040 Classic for REA & M90 Systems - Maintenance

2 2

2. Place one end of the ohmmeter on the clamp of
the ground wire assembly and the other end on the
power supply ground stud. If the ohmmeter reads
greater than 25 ohms, replace the 14 AWG ground
wire assembly.

3. Connect one end of the ohmmeter to the Power
Supply Ground Stud and the other to the metal
applicator body (automatics) or handle bracket
(applicators). If the ohmmeter reads greater than
25 ohms, repair or replace the high voltage cable.

kV Output T

kV Output Test

est

When a lack of high voltage at the spray applicator
indicates a problem, perform a kV Output Test of
the power supply to determine whether it is at fault.

Equipment Required:

Equipment Required:
- Calibrated ITW Ransburg 20791 High Voltage
Test Probe & Meter

kV Output Test Procedure

1. Turn AC power to the power supply OFF

OFF

OFF.

2. Remove the high voltage cable from the power
supply.

3. Turn the high voltage adjust knob FULLY
counter-clockwise.

4. Open the cabinet door and position jumper JP4
on the main PC Board so that it covers (shorts)
both terminals.

5. Attach the appropriate high voltage cable to the
20791 Test Probe, properly ground the probe to a
true earth ground, and turn the test probe meter on
(see the "Operation Manual" for the 20791 Tester).

6. Insert the Test Probe High Voltage cable into
the power supply high voltage tube until it bottoms
out.

7. Turn the power supply ON.

8. Turn the high voltage adjust knob FULLY
clockwise and read the output voltage displayed
on the meter, then turn the power supply OFF. If
the voltage read correctly (see "Specifications" in
the "Introduction" section of this manual), the
problem is not in the power supply and the high
voltage cable and spray applicator should be
checked for the cause. If the voltage did not read
correctly, the problem is with the power supply.
Consult the "Troubleshooting Guide" to locate the
specific problem.

9. Disconnect the 20791 Test Probe and reposition
JP4 so that it covers only one terminal. When
ready to resume spray operations, reconnect the
spray applicator high voltage cable and turn the
power supply on.

Current Output (SCI) T

Current Output (SCI) Test

est

When a lack of high voltage at the applicator
indicates a problem a Current Output (SCI) Test
may be performed, in addition to the kV output test,
to help determine if the power supply is at fault.

On applicators, ground is passed from

the high voltage cable to the handle by
way of the handle set screw. Ensure the
set screw is completely tightened and re-
peat step 3 before replacing the high volt-
age cable on applicator units.

N O T E

Ensure that the Test Probe high volt-

age cable makes good contact both inside
the Test Probe and inside the Power Sup-
ply High Voltage Tube.

N O T E

Whenever removing high voltage cables

from equipment, ground the plug end of the
cable(s) by contacting the plug to electrical
ground. DO NOT

DO NOT

DO NOT touch the plug until it has

been grounded. This will eliminate the
possibility of residual charge causing electri-
cal shock.

W A R N I N G

!!!!!

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