To Adjust The Power Supply - HP 54616B User And Service Manual

Service
Adjusting the Oscilloscope

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
supplies to within tolerance.
Table 4-9 Equipment Required
Equipment
Digital multimeter
Set up the oscilloscope for the voltage adjustment.
1
a
b
c
d
e
f
4–22
Critical specifications
0.1 mV resolution, accuracy ±0.05%
Turn off the oscilloscope and disconnect power cable.
Remove the cover from the oscilloscope as described in "To replace
an assembly" on page 4-46 of this chapter.
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