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RSP8 Diagnostics and Troubleshooting
Appendix A-4
EEPROM Test
Veri fi es that the small non-volatile memory used to hold joystick
calibration and other permanent data has retained valid data
from the last time this test was run. It also veri
fi es that this data
can be successfully updated. Note: If the EERPOM chip has been
changed, the EEPROM Initialize test must be run
fi rst (see
below). When complete the diagnostic displays either PASS or
FAIL. A failure indicates a problem with the EEPROM chip on the
CPU board or that it hasn't been initialized.
Display Test
Veri fi es proper communication with the display module and also
checks accurate functioning of the display's memory. It also
checks the restrike capability of the backlight power supply.
When run, the display will show several different random
patterns which is part of the display memory test and will also
turn the backlight off and on once. When complete the diagnostic
displays either PASS or FAIL. A failure indicates a problem with
the LCD module or connecting cable. If the backlight fails to turn
back on promptly, it may be nearing the end of its useful life of
approximately 20,000 hours or the RSP8 is not receiving suf
fi cient
power due to a long or defective connecting cable.
Communication Test
Con fi rms error-free communication with the attached KSP8
through the connecting cable. For it to work, the RSP8 must be
connected to a KSP8, either directly or through a HUB7, and the
KSP8 must be operating normally (not in diagnostic mode itself).
The test works by sending a large number of messages
containing pseudo-random data to the KSP8 which is expected to
complement the data and return it to the RSP8 which then
recomplements it and compares with the original data sent. This
is called a “buffered test” because the KSP8 receives an entire
message before complementing and returning it. Its also possible
to use a special “loopback cable” to run this test which is
typically only done at the factory.