Thermal Arc 181i FABRICATOR Service Manual page 46

FABRICATOR 181i
IGBT Testing
IGBT 1
IGBT 2
IGBT 3
IGBT 4
3
1
2
Inrush PTC
PTC
Troubleshooting
Multimeter Lead Placement
Positive meter lead to testpoint 17
Negative meter lead to testpoint 9
Positive meter lead to testpoint 18
Negative meter lead to testpoint 11
Positive meter lead to testpoint 19
Negative meter lead to testpoint 13
Positive meter lead to testpoint 20
Negative meter lead to testpoint 15
Table 6-6 IGBT's, Multimeter set to measure ohms (Ω)
12
10 9
18
17
4
5
6
Multimeter Lead Placement
Positive meter lead to testpoint 21
Negative meter lead to testpoint 22
Table 6-7 Inrush PTC, Multimeter set to measure ohms (Ω)
14
19
11
6-6
TROUBLESHOOTING
Impedance
150 to 350 Ω
150 to 350 Ω
150 to 350 Ω
150 to 350 Ω
20
16
13
15
22
8
7
A-09988
Impedance
0 to 100 Ω
Manual 0-5152
21