MK Products Cobramatic 42VAC - Manual (Page 16)

Cobramatic ® Owner’s Manual - page 10
Testing the Speed Control
NOTE:
The torch should be tested first and the amphenol must be connected to the
Cobramatic® to perform this test.
Place a voltmeter across diode D10 and press torch trigger. A reading of 0 -
24VDC should be observed, as the torch potentiometer varied.
Testing the Torch
Motor Check
Remove the amphenol connector from the cabinet.
Using the torch amphenol, check the resistance across pins
“A” and “B”
(motor leads). The resistance across the motor should be between 5-10
ohms.
If an open circuit or short exist, check the motor leads and motor indepen-
dently.
Testing the Potentiometer - “W” Clocked
Using the torch amphenol, check the resistance across pin “D” (wiper) and
pin “C”. The resistance should vary from 0 - 5K ohms.
Check the resistance across pin “D” (wiper) and pin “G”. The resistance
should vary from 5K - 0 ohms.
Testing the Micro Switch
Using the torch amphenol, check for continuity across pins “E” and “F” when
the trigger is pressed.
24.0
VDC
+ -
D10