A5 Cpu Assembly Troubleshooting - Keysight N5171B EXG Service Manual

Troubleshooting
Troubleshooting Assembly Level Problems

A5 CPU Assembly Troubleshooting

At power-on, the A5 CPU and the installed firmware run a series of initializing
boot-up procedures and instrument operational checks. The operational
checks are completed if all power supply voltages are present, the A5 CPU is
working correctly and the main FPGA's initialization has finished. If any part of
the boot-up procedure fails, an error message will be displayed.
An A5 CPU failure symptom will change according to the type of failure that
has occurred. A complete A5 CPU failure may still allow the signal generator to
power up and all power supplies to be verified. Complete the following
procedure to isolate the faulty assembly.
1. Monitor the
2. If the "Service Menu" is immediately displayed, and at the bottom of the
3. If all power supplies are functional, attempt to communicate with the
4. If minimal or no communication/functionality occurs, replace the A5 CPU.
5. If you can communicate, re-install the signal generator's firmware. Go to
Keysight recommends, when possible, always loading the most recent version of firmware
before replacing any assembly.
Keysight X-Series Signal Generators Service Guide
"Boot-up Routine" on page
— If any failures occur troubleshoot them.
screen the statement "Failed to start firmware" appears:
a. The CPU Operating System (OS) has been corrupted. Possible cause
is from downloading the wrong FW into this unit.
b. The CPU is no longer usable and will need to be replaced.
signal generator by:
— front panel
— LAN or USB. Refer to the Keysight Signal Generators Programming
Guide for instructions on connecting through LAN and USB.
www.Keysight.com/find/upgradeassistant for information on re-installing
the EXG or MXG X-Series firmware.
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