CIGWELD WeldSkill 200AC/DC - DC Bus Measurement of Main Inverter Board

TROUBLESHOOTING WELDSKILL
200AC/DC INVERTER
Manual 0-5206 6-3 Troubleshooting
6.05 Preliminary DC Bus measurement of the main inverter board
!
Read and follow safety information in Section 6.02 before proceeding.
!
Check DC bus voltage has discharged to less than 5VDC before servicing. Ensure the mains supply plug
is disconnected from receptacle
1
23
4
5
6
7
8
9
10
11
A-11421
DC Bus Testing Multimeter Lead Placement Voltage with Supply voltage OFF
Upper capacitor bank Positive meter lead to testpoint 1
Negative meter lead to testpoint 2
0 VDC
Lower capacitor bank Positive meter lead to testpoint 2
Negative meter lead to testpoint 3
0 VDC
Table 6-2: DC BUS, Multimeter set to measure DC volts