Mosa MS 200 S, Use And Maintenance Manual

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TROUBLESHOOTING MS 200 S - MSG 200/CHOPPER
MSG 201 S 50/60 Hz
© MOSA 1.0-09/95
18/09/95 10160M9.7 - GB
M
9.7
SYMPTOM POSSIBLE CAUSES REMEDY
d)Faulty printed circuit
board
If no other faults are found the printed circuit board is faulty.
Replace as follows:
- Disconnect all wires with connectors
- Remove the electronic circuit from the mounting frame.
e) Faulty welding diodes Check the diodes by putting the welding/auxiliary knob in the
welding position and with a multimeter set on “diode test”, check
them between the welding o and - there is 0.9 ÷ 1V in
one sense and open circuit in the opposed sense.
If the bridge is faulty, it is advised to turn to an authorized service
center for the replacement.
ONLY FOR MS 200 S
Check the diodes with a multimeter set on “diode test”, check
them between the welding o and - there is 0.9 ÷ 1V in
one sense and open circuit in the opposed sense.