Secondary Rectifier; Voltages - Kemppi MinarcTig Evo 200 Service Manual

Service manual MinarcTig Evo 200

4.2.1.3. Secondary rectifier

Main supply voltage must
Use a digital multimeter to test the secondary diodes. Diodes are in groups, so it is not possible to meas-
ure them one by one unless they removed from the board and measured separately.
Diode Positive test lead
Forward bias Negative output terminal
Reverse bias Positive output terminal

4.2.1.4. Voltages

The Z001 main circuit card has the DC-link voltage after the input rectifier and several auxiliary voltages
made by the auxiliary PSU.
Note! These voltages are in the primary side. Even touching the ground level may affect electric
shock because there is up to 120VDC between the ground and protective earth.
19
Kemppi Oy
not
be connected during the secondary rectifier diode measuring.
Version 1.1.5.
Negative test lead
Positive output terminal
Negative output terminal
Primary GND,
R9 upper side connection point
+24VDC,
V5 left side connec-
tion point
+16VDC,
R10 left side connec-
tion point
29.9.2015
Result
0,2-0,6VDC
No value