Chapter 8 171
Power Supply/Midplane Troubleshooting
A6 Midplane Assembly Troubleshooting
A6 Midplane Assembly Troubleshooting
If there is an analyzer function such as a boot up issue where the power supplies
are suspect, view the power supply LED's on the Midplane Assembly by removing
the instrument outer cover. See Figure 8-4.
Figure 8-4 Midplane Assembly
As shown above, the Midplane Assembly has test points for each power supply
that can be used as measurement points. These DC voltages can be verified with a
voltmeter. Continuity measurements can also be performed on each power supply
if a shorted condition is suspect. Refer to the table below for measurement details.
A9, L.O. Board
plugs into J21
A5, Power Supply plugs
into J101 and J102
A3, CPU Assembly plugs into
J201, J202, J203 and J204
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