To adjust the power supply
On the power supply there is only one adjustment and that is for the
+
5.1 V.
The other voltages are based on the
+
5.1 V adjustment. In this procedure
you use a multimeter to measure the
+
5.1 V, and if necessary, you adjust the
supply to within tolerance.
Table 4-12
Equipment Required
Equipment Critical specifications Recommended Model/Part
Digital multimeter 0.1 mV resolution, accuracy ±0.05% HP 34401A
1
Set up the oscilloscope for the voltage adjustment.
a
Turn off the oscilloscope and disconnect the power cord.
b
Remove the cover from the oscilloscope.
c
Place the oscilloscope on its side.
d
Connect the negative lead of the digital multimeter to a ground point
on the oscilloscope.
e
Reconnect the power cord and turn on the oscilloscope.
Service
Adjusting the Oscilloscope
4–28
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