TROUBLESHOOTING WELDSKILL 250, 350
Manual 0-5186 6-13
Troubleshooting
13. Outputs from Control PCB
Terminal Output Descriptions
Reference
CN9/3
DC supply to wire drive motor
CN9/3 = 0 to -24 Vdc
CN9/1
CN1/1
AC supply to contactor and gas solenoid
CN1/1 = 0 Vac (contactor & solenoid on)
CN1/3
CN8/3
Reference voltage for wirespeed potentiometer
CN8/3 = ~7.0 Vdc
CN3/2
CN4/1
POWER led
CN4/1 = 1 to 3 Vdc (POWER led on)
CN4/2
CN4/3
OVER TEMPERATURE led
CN4/3= 15Vdc (Thermostat closed)
CN4/3= 1 to 3 Vdc (Thermostat open)
CN4/2
CN6/7
15V supply for INCH button
CN6/7= 15 Vdc
CN3/2
CN6/2
BURNBACK
CN6/2 = 0 Vdc (Trigger open)
CN6/2 = 12 to 14 Vdc (Trigger closed)
CN3/2
Table 6-15 Outputs from Control PCB
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