To adjust the display (HP 54620A only)
WARNING
The maintenance described in this section is performed with power supplied
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 Critical specifications Recommended Model/Part
Digital multimeter 1 mV resolution, accuracy
±
0.05%
HP 34401A
1
Set up the logic analyzer for the voltage adjustment.
a
Turn off the logic analyzer.
b
Remove the cover from the logic analyzer.
See chapter 6, “Replaceable Parts,” for disassembly procedures.
c
Place the logic analyzer on its side.
d
Connect the negative lead of the digital multimeter to a ground point
on the logic analyzer.
e
Turn on the logic analyzer.
2
Connect the digital multimeter to the end of R901 closest to the fuse.
See figure 55.
3
Adjust
+
B for
+
14.00 V.
4
Press
Print/Utility
. Press
Self Tst Menu
, then
Display
.
If the HP 54620C display test fails, you must replace the display. See "To test
the display" in this chapter.
5
Adjust V.HO (vertical hold) for vertical synchronization.
6
Set the intensity control (on the front panel) to mid-range.
Testing, Adjusting, and Troubleshooting the Analyzer
To adjust the display (HP 54620A only)
162
To Next Page
Loading...
