To Adjust The Display (Hp 54620A Only); Table 10. Equipment Required (Adjusting Display) - HP 54620A User's And Service Manual

Testing, Adjusting, and Troubleshooting the Analyzer

To adjust the display (HP 54620A only)

To adjust the display (HP 54620A only)
The maintenance described in this section is performed with power supplied
W A R N I N G
to the logic analyzer and with the protective covers removed. Only trained
service personnel who are aware of the hazards involved should perform the
maintenance. Whenever possible, perform the procedures with the power
cord removed from the logic analyzer. Read the safety summary at the back
of this book before proceeding.
The display does not normally need adjustment. You should use this
procedure only for the few cases when the display is obviously out of
adjustment.
Table 10 Equipment Required
Equipment
Digital multimeter
Set up the logic analyzer for the voltage adjustment.
1
Turn off the logic analyzer.
a
Remove the cover from the logic analyzer.
b
See chapter 6, "Replaceable Parts," for disassembly procedures.
Place the logic analyzer on its side.
c
Connect the negative lead of the digital multimeter to a ground point
d
on the logic analyzer.
Turn on the logic analyzer.
e
Connect the digital multimeter to the end of R901 closest to the fuse.
2
See figure 55.
Adjust +B for +14.00 V.
3
Press
4
If the HP 54620C display test fails, you must replace the display. See "To test
the display" in this chapter.
Adjust V.HO (vertical hold) for vertical synchronization.
5
Set the intensity control (on the front panel) to mid-range.
6
162
Critical specifications
1 mV resolution, accuracy
±0.05%
. Press
Print/Utility
Recommended Model/Part
HP 34401A
, then
Self Tst Menu Display
.