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b. Check for correct line voltage on the primary of
high voltage transformer. See Fig. 19.
(1) If line voltage power is not present, check
back
through
the
power
source
wiring to
locate the problem.
(2) If the correct voltage is measured, continue
with check c., below.
. Energize the high voltage power supply and check
voltage across yellow leads for correct operation
of the indicator light.
(1) If the voltage is correct
(about
120V
ac)
but the light is out, replace the switch-light
assembly.
(2) If there is no voltage, or less than
100V
ac, continue the checkout (step 5).
INDICATOR
LIGHT TERMINALS
REAO ABOUT
120V AC
FIG. 20—USE A METER OR TEST LIGHT TO CHECK
FOR
VOLTAGE
ON
INDICATOR
LIGHT
IN ON-OFF SWITCH.
5. ISOLATE
TRANSFORMER
FROM
VOLTAGE
DOUBLER CIRCUIT
a. Turn off power.
b. Unplug the two quick-connectors
on the diodes
(points W and Y). This disconnects the voltage
doubler circuit from the high voltage transformer.
c. Energize the power supply.
(1) If the light comes on, check for a problem
in the voltage doubler circuit.
(2) If the light still does not come on, check
for a problem in the high voltage transformer.
COLLECTOR
RESISTOR
CAPACITORS
BLEED RESISTOR
FIG. 21-DISCONNECT
DIODES
AT
POINTS
W
AND Y.
Page
15
COMPONENT
CHECKS
CHECK ELECTRONIC CELLS
Carefully examine the electronic cells. Look especially
for:
—Bent collector plates.
—Broken ionizing wires.
—Dirt accumulation on insulators.
—Damage
to ionizer
and
collector
contact
tabs.
—Good
contact
between
cell and
power
supply
contacts.
CHECK FOR SHORT CIRCUITS
Use an ohmmeter
to check
resistance between
the
outside
frame
of the cell and both
the ionizer and
collector
contacts.
In each case the resistance
should
be infinite (open circuit).
FIG. 22-USE
AN
OHMMETER
TO
CHECK
THE
ELECTRONIC
CELLS
FOR
SHORT
CIRCUITS.
CHECK VOLTAGE DOUBLER CIRCUIT
This
check
will locate
a faulty
component
or
connection in the voltage doubler circuit.
CAUTION
The line voltage power is turned on and off several
times in this check. BE SURE THAT THE POWER
IS OFF before connecting or disconnecting any
component.
1. Inspect the voltage doubler circuit components
for any sign of physical damage.
2. Turn off power and reconnect Diode 2 to point Y.
Energize the power supply and check indicator light,
or measure voltage or check arc across C2 (Z to Y).
a. Diode 2 and C2 are good if:
—Indicator
light goes
on
(if it was off in
earlier checks).
—The
voltage across
C2 is over
3,500V dc.
—The correct arc is obtained (moderate, blue,
snapping spark).
. Diode 2 or C2 is defective if:
—The indicator light does not come on.
—The voltage across C2 is less than 3,500V dc.
—The proper arc is not obtained.
60-2407
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