Lincoln Electric INVERTEC 270SX Service Manual page 41

OUTPUT BOARD VOLTAGE TEST (continued)
J33
to input bd
J31
Hall sensor
TEST PROCEDURE
1. Apply 400V +/- 15% to the INVERTEC
2. Turn the machine input swith to ON position, and wait till the power LED on front panel is stady green.
3. Follow the below tables test to perform the voltage tests on connectors and Static Switch IGBT:
J33: Output/Input connector
Pin# Description
• 3,9Vdc in any stick modes
1 V_OUT ref
• 0Vdc in Lift Tig mode
2 SW_CTRL
3 -5V
• 4Vdc=400A for 400SX
4 I_EL
5 SGND
6 Not Used
7 /TR
8 /PIP
9 ARCINITIATED
• 0V=normal value
• 9,7Vdc +/- 10% = thermic activated on
10 THD
output board
11 +15V
12 VREG-NOZ
J31: Hall Sensor
Pin# Description
1 +15V
2 -5V
3 I OUT
4 SGND
for INVERTEC
®
400SX
Idle Value/Ref
-
-5Vdc
SGND
-
+15Vdc
-
Idle Value/Ref
+ 15V
-5V
50A=0,7Vdc
200A=2,7Vdc
400A= 5,3Vdc
SGND
Page 41
®
400SX
Notes
Only in stick modes Stand-by condition during
OCV
Not Used
-5V power supply generated by the input board
Electrode Current feedback from HCS2
Secondary GND for power supply (0V ref.)
-
Not Used
Not Used
Not Used
Thermal tab on the output heat sink
+15V power supply generated by the input board
Passer-by signal
Notes
+ 15V power supply for the hall sensor probe
-5V power supply for the hall sensor probe
Output current reference
Secondary GND for power supply (0V ref.)