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Chapter 6 Service and Repair
Troubleshooting
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6
Self-Test Errors 605 - 609
If the instrument reports self-test errors 605-609, this means the
processor board is unable to correctly program or communicate with the
waveform FPGA (U1005) on the main board. In this case further,
troubleshooting is required to determine where the fault lies. The
problem could be due to out of date firmware, unseated processor board
or main board, main board failure or processor board failure. Before
starting proceeding with troubleshooting these errors, ensure that the
instrument firmware is up to date. If the errors are still being reported
then continue with the following procedure.
Reseat the Boards Power off the unit, remove the cover. Reseat the
processor board, and the main board. Power up the unit and see if the
errors 605-609 are still being reported at power-on.
Check Power Supplies Probe the system power supplies and verify they
are operating within limits. If any of the power supplies are out of limit,
diagnose the power supply. Otherwise, continue on to the SPI
communications.
Probe the SPI communications lines If you still see errors after reseating
the boards, then the next step is to probe the SPI communications lines
between the processor board and the main board. First, locate LED
DS1001 on the main board as shown below. Cycle power on the unit, wait
until it fully boots, and see if the main board LED lights up. The main
board LED indicates whether the FPGA was successfully programmed.
The following sections indicate which signal lines to probe on the main
board connector (J201).
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