To Adjust The Power Supply - HP 54645A User's And Service Manual

Testing, Adjusting, and Troubleshooting

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
Digital multimeter
Set up the oscilloscope for the voltage adjustment.
1
a
b
c
d
e
f
7-30
Critical specifications
0.1 mV resolution, accuracy 0.05%
Turn off the oscilloscope and disconnect power cable.
Remove the cover from the oscilloscope. See chapter 8,
"Replacement Parts."
Place the oscilloscope on its side.
Connect the negative lead of the digital multimeter to a ground point
on the oscilloscope chassis.
Reconnect power cable.
Turn on the oscilloscope.
Recommended
Model/Part
HP 34401A