Tweco 51 with SL100SV CutMaster - Manual (Page 94)

SERVICE 5-30 Manual 0-4640
5
2. Output Diode Module Board Circuit Test
a. Use an ohmmeter set on the diode function and make the following measurements on the Output Diode Module Boards
to Power Output PC Board.
Meter (+) Meter (-) Indication
E18 E21 Diode Drop
E21 E18 Open
E18 E20 Diode Drop
E20 E18 Open
E20 E19 Diode Drop
E19 E20 Open
E21 E19 Diode Drop
E19 E21 Open
E18 E19 (2) Diode Drops
E19 E18 Open
CutMaster 51 Output Diode
Test Readings
b. The meter should indicate a diode drop in one direction and an open in the other direction for each check. Replace the
Output Diode Module Board(s) if the readings do not match the chart.
3. IGBT Module Board Circuit Test
a. Use an ohmmeter set on the diode function and make the following measurements on the IGBT Module Board(s) to the
Main PC Board.
Meter (+) Meter (-) Meter (+) Meter (-) Indication
E3 E13 E35 E13 Diode Drop
E13 E3 E13 E35 Open
E15 E3 E15 E35 Diode Drop
E3 E15 E35 E15 Open
E15 E13 E15 E13 (2) Diode Drops
E13 E15 E13 E15 Open
208/230V
Power Supply
400V & 460V
Power Supply
CM51 IGBT Test Indications
b. The meter should indicate a diode drop in one direction and an open in the other direction for each check. Replace IGBT
Module Board(s) if readings are not the same as the chart.