Fein KBM 50 Q - 3.2. Major functional test

MVK 03 / 07
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Fein Repair Tool
Possible causes Test possibilities
Magnetic foot does not
energize:

Check with
magnetisable part
power cable disconnected,
switch off,
connector not plugged in

LED on board must light up
briefly while switching on.

check power voltage on
X1, X2 continuity
magnetic foot defective

LED on board is flashing

measure resistance (504Ω
±
5%)
elektronics defective

LED on board is flashing

measure voltage on X7.1 and
X7.2 .
Magnetic holding force
too weak:
do not turn on while testing
motor switch

measure the voltage on X7.1
and X7.2

measure the
magnetic foot defective

measure resistance (504Ω
±
5%)
removal force
required
standing surface uneven

visual inspection
elektronics defective

measure the voltage on X7.1
and X7.2
3.2.1. Major functional test
Note: If the magnetic foot is defective, no further tests are possible.
Because of magnetic foot monitoring, the motor cannot be turned on.
Connect the spare magnetic foot.