Tweco CutMaster 101 with SL100SV - Manual (Page 92)

SERVICE 5-28 Manual 0-4642
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.
Indication
Meter + Meter - Meter + Meter -
E37 E58 E36 E57 Diode Drop *
E58 E37 E57 E36 Open
E37 E47 E36 E49 Diode Drop
E47 E37 E49 E36 Open
E58 E47 E57 E49 Open
E47 E58 E49 E57 Diode Drop
Output Diode A Output Diode B
* Indication can be twice other indications.
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.
Indication
Meter + Meter - Meter + Meter -
E10 E4 E27 E23 Diode Drop
E4 E10 E23 E27 Open
E10 E20 E27 E30 Open
E20 E10 E30 E27 Diode Drop
E4 E20 E23 E30 Open
E20 E4 E30 E23 Diode Drop *
IGBT PCB A IGBT PCB B
* Indication can be twice other 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.