9
Controller
Section
The Controller Section includes the A2 Controller Assembly, A19 HP-IB Assembly, and
BTl
Battery. The presence of a display (graticule and annotation) verifies that most of A2
Controller Assembly is operating properly.
Troubleshooting Using the TAM
......................................................
.9-l
Blank Display
........................................................................
.9-2
Digital Signature Analysis (DSA)
......................................................9-4
Display Problems....................................................................
.. 9-4
Line Generators....................................................................
.. 9-4
Blanking
...........................................................................
.. 9-5
Display Jumbled or Trace Off Screen...............................................
.. 9-7
Intensity..........................................................................
.. 9-10
Bad Characters or Graticule.......................................................
.. 9-10
Long Lines Dimmer Than Short Lines
..............................................
. 9-11
Analog Zero-Span Problems
........................................................
.. 9-12
Frequency-Count Marker Problems
...................................................
9-13
Frequency Counter
.................................................................
.. 9-14
State- and Trace-Storage Problems
..................................................
.. 9-15
Keyboard Problems
................................................................
.. 9-16
Note
When measuring voltages or waveforms, make ground connections to
A2TP3.
The metal board-standoffs are not grounded and should not be used when
taking measurements.
Troubleshooting Using the TAM
Table 9-l lists assembly test connectors associated with each Manual Probe Troubleshooting
test. Figure 9-l illustrates the location of
A2’s
test connectors.
Controller Section 9-1
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