Ransburg 9040 Cascade LV Control Unit 76580 - Manual (Page 30)

CP-97-04.3 2 7 2 7 2 7 2 7 2 7
9040 Cascade Low Voltage Control Unit - Maintenance
> >> > > The troubleshooting procedure outlined in
“Troubleshooting Flow Charts” requires
measurement of voltage potentials that can
cause SERIOUS BODILY INJURY if proper
measuring procedures are not followed. For
this reason, proper troubleshooting should
ONLY be accomplished with specific test
equipment by qualified electronics
technicians or authorized ITW Ransburg
representatives.
W A R N I N G W A R N I N G W A R N I N G W A R N I N G W A R N I N G !!!!!
Bench T Bench T Bench T Bench T Bench Testing esting esting esting esting
The DC input to the oscillator is interlocked with
2PL terminals 1 and 2, such that the oscillator will
not function unless terminals 1 and 2 of 2PL are
connected together. In this manner, high voltage
to the applicator is controlled as follows:
1. When air flows through the flow switch, the
switch contacts close connecting 2PL-1 and 2
together, thereby providing voltage to the REA-
70 and REA-90 applicators.
2. Pulling the trigger on the REM applicator
activates a reed switch in the applicator handle
that connects 2PL-1 and 2 together, thereby
providing voltage to the applicator.
3. When pressure signals are supplied to the
pressure switches, the switch contacts close
connecting 2PL-1 and 2 together, thereby
providing voltage to automatic applicators.
4. Contact closure of a programmable controller
output, robot output, or some other user supplied
device connected to terminals 2PL-1 and 2 will
activate high voltage at the applicator.
5. For testing and troubleshooting, board jumper
JP4 connects 2PL-1 and 2 together, thereby
providing high voltage output (see “PC Board Test
Jumper” previouslly discussed in this section).
> Before going through the trouble of a
complete bench test, jumper JP4 on the
main PC board to trigger the high voltage
and see if the suspected problem goes
away. If it does, replace the high voltage
trigger device (flow switch, pressure
switch, PC contact, etc.) or repair the
internal wiring of the control unit connect-
ed to the trigger device, and test again. If
the problem does not go away then pro-
ceed with a bench test.
N O T E N O T E N O T E N O T E N O T E
Equipment Required: V Equipment Required: V Equipment Required: V Equipment Required: V Equipment Required: Volt/ olt/ olt/ olt/ olt/
Ohmmeter Ohmmeter Ohmmeter Ohmmeter Ohmmeter
This section provides a flow chart for
troubleshooting the control unit when improper
operation is obtained and the problem has been
traced to the control unitl. Proper troubleshooting
should ONLY be accomplished with specific test
equipment, by qualified electronics technicians,
or authorized ITW Ransburg representatives.
Before troubleshooting, ensure that the control unit
is plugged into a live outlet of the appropriate
voltage. All electrical measurements in the
“Troubleshooting Flowchart” are nominal and may
vary as much as +/- 10% depending on the test
conditons and the test equipment used. Refer to
“Figure 4 - Main PC Board” and “Figure 9 -
Troubleshooting Diagram” for location of parts
called out in “Troubleshooting Flowcharts”.
For bench testing, jumper JP4 should be used to
trigger the high voltage output (see “PC Board Test
Jumper” previously discussed in this section).
ARCHIVE