N9030B PXA Signal Analyzer Service Guide 63
Boot Up and Initialization Troubleshooting
Potential Problems During Boot Process
Fan(s) Are Not Operating
Control of the instrument fans comes from the A6 Power Supply assembly. This
signal is routed from the A6 Power Supply through the A7 Midplane board,
where there is a test point and LED to monitor the level, and is then routed to
the A8 Motherboard where it is filtered before being sent to the Fans. When the
Fans do not come on it could be due to any one of these assemblies. This
procedure will help to determine which one is the cause.
This procedure assumes that the green Power On LED on the front panel does
turn on when the instrument is turned on. If it doesn't, refer to the “Green
Power On LED Does Not Illuminate” section before proceeding.
1. The instrument fans will only turn on when the instrument is connected to
an AC power source that has a voltage level and frequency of that
specified for the instrument and the front panel On/Off button has been
pressed. Before proceeding verify that these requirements are being met.
Refer to the instrument rear panel for these requirements.
2. Remove the AC power cord and then remove the instrument cover. Refer
to Chapter 16, “Assembly Replacement Procedures”, on page 429 in this
manual.
3. Are all three fans not spinning?
If yes:
Proceed to step 4.
If not:
Proceed to step 6.
4. Remove the Top Brace. Refer to Chapter 16, “Assembly Replacement
Procedures”, on page 429 in this manual.
To Next Page
Loading...
Need help?
General
