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TROUBLESHOOTING & REPAIR
F-22 F-22
POWER MIG 350MP
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CHOPPER BOARD TEST (continued)
FIGURE F.4
L11088-1
J6
PWM SIGNAL TEST
1. Locate 607 (7J6) and 615 (15J6) on the control
board. See Figure F.4.
2. Perform the following voltage test or hertz read-
ings when the trigger is pulled.
J6
607
615
From Lead
607
(7J6)
To Lead
Expected Voltage
615
(15J6)
1.8-2 VDC
20 KHZ