Tweco 42 CutMaster Service Manual - Manual (Page 44)

Troubleshooting 6-8 Manual 0-5171
CUTMASTER 42 TROUBLESHOOTING
IGBT Testing Multimeter Lead Placement Diode Voltage
IGBT 1
Positive meter lead to test point 3
0.2000 to 0.8000 VDC
Negative meter lead to test point 2
IGBT 2
Positive meter lead to test point 5
0.2000 to 0.8000 VDC
Negative meter lead to test point 4
IGBT 3
Positive meter lead to test point 8
0.2000 to 0.8000 VDC
Negative meter lead to test point 7
VIGBT 4
Positive meter lead to test point 10
0.2000 to 0.8000 VDC
Negative meter lead to test point 9
PFC IGBT 1
Positive meter lead to test point 14
0.2000 to 0.8000 VDC
Negative meter lead to test point 13
PFC IGBT2
Positive meter lead to test point 12
0.2000 to 0.8000 VDC
Negative meter lead to test point 11
PILOT IGBT1
Positive meter lead to test point 26
0.2000 to 0.8000 VDC
Negative meter lead to test point 25
Table 6-2 IGBT’s, Multimeter set to measure Diode Voltage
6.09 Check Main On / Off Switch
!
Read and follow safety information in Section 6.02 before proceeding.
Art # A-10245
1
2
3
4
Power Switch Testing Multimeter Lead Placement Impedance
Switch ON Positive meter lead to testpoint 1
Negative meter lead to testpoint 2
0 to 1 Ω
Switch ON Positive meter lead to testpoint 3
Negative meter lead to testpoint 4
0 to 1 Ω
Switch OFF Positive meter lead to testpoint 1
Negative meter lead to testpoint 2
> 1k Ω
Switch OFF Positive meter lead to testpoint 3
Negative meter lead to testpoint 4
> 1k Ω
Table 6-3 Power Switch, Multimeter set to measure ohms (Ω)