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Troubleshooting
Potential Problems During Boot Process
Verify Video Signal Path Integrity
The video controller is located on the A4 Processor assembly and is routed to the
front panel LCD through a few interconnections. These interconnections are:
• A4 Processor assembly to A7 Midplane Board
• A7 Midplane Board to A8 Motherboard assembly
• A8 Motherboard assembly to A1A2 Front Panel Interface assembly via W1
ribbon cable
• A1A2 Front Panel Interface to A1A3 LCD via A1W1 flex-circuit
If all of these connections are properly made and none of the cables are damaged
proceed to
"Video Controller / LCD
Troubleshooting".
Video Controller / LCD Troubleshooting
The video controller is located on the A4 Processor assembly. The video signals
that the controller outputs are LVDS. As described above, these signals are routed
to the LCD via the A7 Midplane Board, A8 Motherboard, and A1A2 Front Panel
Interface board.
On the A1A2 Front Panel Interface board the LVDS signals are buffered and then
sent to the LCD via the A1W1 Flex circuit.
The most likely cause for a video problem is the A4 Processor assembly; however
it could be the result of a defective LCD.
Initializations Did Not Complete
During the initialization of the N9039A RF Preselector Application the following
messages will be displayed on the application splash screen:
• Checking for required services.... (1 of 7)
• Initializing License Services.... (2 of 7)
• Initializing Hardware.... (3 of 7)
• Initializing Hardware2.... (4 of 7)
• Initializing Data Service.... (5 of 7)
• Initializing Message Service.... (6 of 7)
• Initializing Front Panel EEPROM HDR.... (7 of 7)
If there is a problem with any of these initializations not completing or causing an
error message to be displayed refer to the instrument Event Log. This can be
accessed by using an external USB keyboard and mouse and selecting Start, Run,
enter Eventvwr.exe, and select OK.
Once the Event Viewer comes up, look under SA for the latest error entries.
Double-click on the entries to view further details, which should give you some
idea of what the problem is.
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Chapter 2
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Table of Contents
Troubleshooting
