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307-638 17
ELECTRICAL TESTS
Test Resistor Stud Resistance
Insert a conductive rod (FF) into the gun barrel (reĆ
moved for the power supply test) and against the metal
contact (GG) in the front of the barrel. See Fig 9.
Measure the resistance between the conductive rod
(FF) and the gun electrode (12). The resistance should
be 20-30 megohms. If the resistance is correct, refer to
the Electrical Troubleshooting Chart for other possiĆ
ble causes of poor performance, or contact the nearest
authorized service agency.
If the resistance is outside the specified range, remove
the electrode (12). See Electrode Replacement. MeasĆ
ure the resistance between the conductive rod (FF) and
the resistor in the inside diameter of resistor stud (16).
The resistance should be 20-30 megohms. If the resisĆ
tance is correct,the electrode wire is defective and must
be replaced. See Electrode Replacement. If the resisĆ
tance is outside the specified range, the resistor is deĆ
fective and the resistor stud (16) must be replaced. See
Resistor Stud Replacement.
If you still have problems, refer to the Electrical
Troubleshooting Chart for other possible causes of
poor performance, or contact the nearest authorized
service agency.
KEY
A Megohmmeter
FF Conductive Rod
GG Metal Contact
12 Electrode
18 Gun Barrel
Fig 9
A
GG
12
18
FF