Ransburg 9040 Classic Power Supply _NO2 Gun 76657-14, -142 User Manual

Page 18

CP-97-03.6

9040 Classic for the No. 2 Process Handgun - Maintenance

1 4

Connect one end of the ohmeter to the
Power Supply ground stud and the other
to the metal gun handle. If the ohmeter
reads greater than 25 ohms repair or re-
place the high voltage cable.

Current Output (SCI) T

Current Output (SCI) Test

est

When a lack of high voltage at the applicator in-
dicates a problem, a Current Output (SCI) Test
should be performed to help determine if the
power supply is at fault (see Figure 6).

Insert the Test Resistor (16688-02) into
the High Voltage Tube of the power sup-
ply.

Set the switch on the Test Assembly
(76652-02) to the

µA position (if using a

VOM set the scale for 200 microamps).

Connect the AC source power and turn
the power supply ON/OFF switch to the
ON position.

Using the clip lead, short circuit the High
Voltage Cable Connector pin 1CON-3 to
ground (rim of High Voltage Cable Con-
nector), as shown in the balloon of Fig-
ure 6. When proper connection is made,
the red high voltage ON Indicator will
light.

ALWAYS

ALWAYS ensure step 3 has been

completed before proceeding with step 4.

W A R N I N G

!!!!!

Read the current draw on the Test As-
sembly (76652-02) (or VOM). The read-
ing should be approximately 75 to 110
microamps. Readings outside of these
limits are indications of a defective
power supply. Refer to the "Trouble-
shooting Guide" (Figure 9) to locate the
specific problem.

Turn all power OFF, wait 10 seconds to
allow high voltage charge to drain off,
remove the Test Assembly and Resis-
tor, and restore the unit to operating con-
dition.

PC Board Test Jumper JP4 may be

used instead of the user supplied clip lead,
to trigger the high voltage on. (See "PC
Board Test Jumper", discussed earlier in
this section, for further information.)

N O T E

If the power supply SCI is normal and

the control circuit operates correctly when
jumpered, then any lack of high voltage or
control malfunction should be isolated to
the gun and/or high voltage cable.

N O T E

Equipment Required:

Equipment Required:
Test Assembly (76652-02)
Test Resistor (16688-02)
Clip Lead (User Supplied)

Turn high voltage OFF and disconnect
AC power to the unit.

Remove the high voltage (HV) cable
from the power supply.

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 possibil-
ity of residual charge causing electrical shock.

W A R N I N G

!!!!!

Using the 76652-02 Test Assembly with
gun test leads attached (or other suitable
VOM), connect the negative lead (white)
to the grooved, metal end of the Test
Resistor (16688-02) and the positive
lead (black) to the rim of the High Volt-
age Cable Connector.