8-2
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Signal Test Board Pin Outs: Description and
Voltage Levels
The tables on the following pages list the pins located on the
signal test board. For each pin, its function, description, and
voltage levels are provided. Details on performing tests using
the test fixture are provided in Section 5 of this manual. Other
than power supply measurements, most of the signals being
measured are made up of waveforms.
Although in some cases a digital voltmeter can be used to
verify the presence of such signals, it cannot be relied upon
to verify that the waveform is correct. An oscilloscope is the
instrument prefered. However, when similar signals are being
measured at multiple points, a digital voltmeter can be used
with some degree of confidence. By comparing several signals
to each other, such as gate drive signals, and obtaining similar
readings, it can be concluded each of the waveforms match
one another and are therefore correct. Values are provided
for using a digital volt meter for testing as well.
Signal Test Board (p/n 176F8437)
The Signal Test Board provides access to a variety of signals
that can be helpful in troubleshooting the drive.
The signal test board is plugged into interface card connector
MK104. Points on the signal test board can be monitored
with or without the DC bus disabled. In some cases the drive
will need the DC bus enabled and operating a load to verify
some test signals.
Following is a description of the signals available on the signal
test board. Section 5 of this manual describes when these
tests would be called for and what the signal should be at
that given test point.
Figure 8-2. Signal Test Board
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