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Check that all basic cards are installed and seated
properly before beginning the troubleshooting procedure.
Basic cards for Model 1 display stations are C-E and G-K.
Model 2 basic cards are C-K. Applicable feature cards
I
should also be installed and seated properly. Diagram 6-12
shows logic board card plugging for display stations with no
4-2
features (1/2 board); Diagram 6-13 shows card plugging for
. display stations that have features installed (2/3 board).
The logic probe is used extensively in this section to
isolate failing cards. Ensure that the logic probe is operating
correctly before troubleshooting. Use the procedure in
paragraph 2.1.3.3 to check out the probe.
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