ESAB fabricator 141i, Service Manual

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ESAB FABRICATOR 141i
Manual 0-5448 6-11 TROUBLESHOOTING
2 Control PCB2
Art # A-12173
Imin
IFB
PWM
Vmin
MB
GUN
QF/DY
WVIN
IGBT OT
NTCS FUNs CR SOURCE DRIVE
Imax
W2
WVF
A
SW0
GUN Header Pin Pin Function Signal
1 +24V Trigger positive
+23V~25VDC (0V when
Trigger closed)
2 Trigger Common 0V
Table 6-16 GUN Header Pin Function (Connects to GUN1 header on Remote Interface PCB4)
PWM Header Pin Pin Function Signal
1 PWM Common 0VDC
2 Motor PWM Driver signal 5V Vpk
Table 6-17 PWM Header Pin Function (Connects to PWM header on Main PCB1)
QF/DY Header Pin Pin Function Signal
1 Not used n/c
2 Solenoid negative (/GAS) 0VDC@Solenoid ON,
+23~25VDC@ solenoid OFF
3 +24V power source for solenoid
+23V~25VDC
4 Common of +24V power source for solenoid 0V
Table 6-18 QF/FJ Header Pin Function (Connects to QF/FJ header on Main PCB1)
FUNs Header Pin Pin Function Signal
1 Fan Positive +20V~24VDC
2 Fan negative (/FAN) 0v@ Fan ON, +20V~24VDC@ Fan OFF
Table 6-19 FUNs Header Pin Function (connects to Fan)