HP 54645A - To Adjust the Power Supply

To adjust the power supply
The power supply has a
+
5.1 V adjustment and a –5.25 V adjustment. 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 –5.25 V, and if necessary, adjust the
power supplies to within tolerance.
Table 7-11
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 power cable.
b
Remove the cover from the oscilloscope. See chapter 8,
“Replacement Parts."
c
Place the oscilloscope on its side.
d
Connect the negative lead of the digital multimeter to a ground point
on the oscilloscope chassis.
e
Reconnect power cable.
f
Turn on the oscilloscope.
Testing, Adjusting, and Troubleshooting
To adjust the power supply
7-30