304 N9030B PXA Signal Analyzer Service Guide
Power Supply/Midplane Troubleshooting
A6 Power Supply Assembly Troubleshooting
A6 Power Supply Assembly Troubleshooting
The A6 Power Supply assembly is serviced as an assembly only; no component
level repair is supported.
If the instrument will not boot up properly, or the display is not turning on, refer
to the PXA Instrument Boot Up Process on page 53 before further A6 Power
Supply troubleshooting to rule out any other assembly as the cause of the
failure.
Supply Voltages
While there are no test points or status LEDs accessible for troubleshooting on
the A6 Power Supply assembly, there are both test points and status LEDs for
all of the different power supply voltages, as well as other power supply status
lines, on the A7 Midplane Board assembly. See the A7 Midplane Board
Assembly section in this chapter for detailed information on the location of
each.
The A6 Power Supply has no user replaceable fuse. While there is a fuse
internal to the supply this is not meant for field replacement. If the internal
fuse is blown, the power supply has experienced a major failure and should
be replaced.
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