Mitsubishi MELDAS TRS50 - Inspection and Adjustment Methods; How to Measure the Voltages and Currents

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INSPECTION AND ADJUSTMENT METHODS
1)
HOW TO MEASURE THE VOLTAGES AND CURRENTS
1.
Motor voltage measurement
Since the voltage output
from the transistor amplifier to the
motor is PWM-controlled,
it appears in the form of pulsive
waveforms.
The value of
the voltage indicated may differ greatly
depending on the type of measuring instrument used. To measure,
first attach the filter shown below and then use a rectifier-type
voltmeter.
Transistor
amolifier
i:Motor
(Waveform before filter
attached)
Wa
lvefonn after filter has been at
:tached)
0
l
‘\
_.
0
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