T1 Transformer Test Procedure; C1 & C2 Test Procedure - Thermal Arc Fabricator 140 Service Manual

FABRICATOR 140, 180

6.12 T1 Transformer Test Procedure

Disconnect and isolate the transformer secondary wire from the Rectifier Assembly Terminal AC1. Refer to
Figure 6-1. Connect the meter between the wire that was removed from terminal AC1 to terminal AC2. Close the
MIG gun switch and observe the voltage. Repeat this test for each position of the Voltage Control Switch.
Voltage Control Switch (SW1) position #
Voltage Control Switch (SW1) position #
6.13 C1 & C2 Test Procedure
Use a Capacitor Tester if available, otherwise visually check C1 & C2 for damage and make sure the relief valve is not
blown. Disconnect one of the wires connecting C1 & C2 to the rectifier assembly. Check continuity between the two
buss bars on C1 & C2. The meter should show a charging action. Reverse the polarity of the probes and you should
see the reading decrease to zero and then start a charging action again.
Replace the capacitors if a short or open is found. Reconnect wires that were previously removed.
Manual 0-4992
Fabricator 140
T1 Secondary Voltage
1
2
3
4
Fabricator 180
T1 Secondary Voltage
1
2
3
4
5
6
6-6
ADVANCED TROUBLESHOOTING
15
18
21
25
17
19
21
23
26
31
January 25, 2008