Tweco 130i Transarc Service Manual - Manual (Page 48)

TROUBLESHOOTING 6-6 Manual 0-5282
TRANSARC 130i
IGBT Testing Multimeter Lead Placement Ohms
IGBT V8 & V8-1 Positive meter lead to testpoint 4
Negative meter lead to testpoint 3
>150 Ω
IGBT T1 & T2 Positive meter lead to testpoint 6
Negative meter lead to testpoint 5
>150 Ω
IGBT T4 & T5 Positive meter lead to testpoint 8
Negative meter lead to testpoint 7
>150 Ω
Table 6-4: IGBT’s, Multimeter set to measure ohms (Ω)
Inrush Resistor Multimeter Lead Placement Ohms
Resistor Positive meter lead to testpoint 9
Negative meter lead to testpoint 10
4 Ω
Table 6-5: Inrush PTC, Multimeter set to measure ohms (Ω)
DIODE Testing Multimeter Lead Placement Ohms
DIODE V7 Positive meter lead to testpoint 11
Negative meter lead to testpoint 12
0.2 – 0.8 VDC
DIODE T14, T15 Positive meter lead to testpoint 13
Negative meter lead to testpoint 14
0.2 – 0.8 VDC
DIODE T16, T17 Positive meter lead to testpoint 15
Negative meter lead to testpoint 16
0.2 – 0.8 VDC
Table 6-6: Diodes, Multimeter set to measure Diode Voltage
6.08 Check main input rectifier
A-11846