Always check unit before applying power (see Sections 8-2 thru 8-11).
TM-246193 Page 48 Invision 352 MPa
Section 8-20. Control Board PC1 Test Point Values (Continued)
Receptacle Pin Type Value
RC6 1 Input Output reference; 1 volt DC per 42.5 amperes of weld output when machine is under load; when machine
at idle, process set to MIG with .035 STL wire and ARGN CO2 gas selected; adjust control set to 10V
preset = 8.2V; adjust control set 38V preset = 9.4V
2 Input Voltage feedback; 1 volt DC per 10 volts DC of weld output
3 Output Current feedback; 1 volt DC per 100 amperes of weld output
4 Not Used
5 Input Output enable; 0 volts DC = ON, +12.5 volts DC = OFF
6 Not Used
7 Not Used
8 Not Used
9 Input Fan enable; +5 volts DC = fan on, −15 volts DC = fan off
10 Not Used
11 Output Main transformer overcurrent detect; +.7 volts DC = OK, +3.3 volts DC = T1 primary overcurrent = HELP
1
12 Not Used
13 Input +3.0 volts DC reference voltage for thermistors
14 GND Circuit common referenced to chassis
15 Output Secondary side thermistor return; +1.2 volts DC at 25
C thermistor temperature
16 GND Circuit common referenced to chassis
17 Output Primary side thermistor return; +1.2 volts DC at 25
C thermistor temperature
18 GND Circuit common referenced to chassis
19 Output Foldback; decreases weld output if input bus voltage drops, 0 volts = OK, +15 volts DC 15Khz pwm
squarewave = foldback
20 GND Circuit common referenced to chassis
21 Output +24 volts DC, unregulated DC voltage with respect to GND
22 Output +24 volts DC, unregulated DC voltage with respect to GND
23 Output −24 volts DC, unregulated DC voltage with respect to GND
24 Output −24 volts DC, unregulated DC voltage with respect to GND
RC7 1 Output +3 volts DC reference voltage for secondary side thermistor
2 Input Secondary side thermistor return; +1.2 volts DC at 25
C thermistor temperature
RC8 1 Output +3 volts DC reference voltage for primary side thermistor
2 Input Primary side thermistor return; +1.2 volts DC at 25
C thermistor temperature