Pcb Connectors - ESAB fabricator 141i Service Manual

DC Bus Testing
Buck CAPACITOR
Note: These DC voltages are at nominal mains supply voltage of 115VAC.

6.11 PCB Connectors

1. Main PCB1
AC1
AC OUT
CIN1
CY1
AC2 AC OUT
CU3
CU4
DC-
DC+
T4
R25
IN Header Pin
1
2
3
4
5
6
7
Table 6-9 IN Header Pin Function (Connects to DRIVE header on Control PCB2)
PWM Header Pin
1
2
Table 6-10 PWM Header Pin Function (Connects to PWM header on Control PCB2)
Manual 0-5448
Multimeter Lead Placement
Negative meter lead to testpoint1
Positive meter lead to testpoint2
Table 6-8 DC BUS, Multimeter set to measure DC volts
DY2
IN
R24
T5
T20-1 T17-1
R101
Pin Function
+15V
IGBT 1, 4 PWM Driver Signal
IGBT 2, 5 PWM Driver Signal
IGBT 2, 5 PWM Driver Signal
IGBT 1, 4 PWM Driver Signal
Rectified Secondary of Current Transformer TR8
Common of +15V
PWM Common
Motor PWM Driver signal
QF/FJ
GAS
DY1
R29 R28
T1 T2
T16-1 T15-1 T14-1
R102 R100
C100
Pin Function
6-9
ESAB FABRICATOR 141i
Voltage with Supply Voltage ON
161 VDC +/-10%
NTCS
2
W05
OUT+
OUT-
COUT1 COUT2
T13-1
Art # A-12172
Signal
+15 VDC
5 VDC Vpk
5 VDC Vpk
5 VDC Vpk
5 VDC Vpk
-6 VDC
0 VDC
Signal
0 VDC
5 V Vpk
TROUBLESHOOTING
PWM
MD