Philips Avalon CTS M2720A, Service Manual

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7 Troubleshooting Factory Information Code Log
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Display/Window
If the base station display does not function or you suspect that it is not working normally, reset the
system (see “System Reset” on page 61), and check the lamps during the lamp-test phase of the self-test.
Look for:
– missing segments of the two-digit display.
– defective lamps.
– LED segments of the two-digit display that are flicker or are darker or lighter than normal (indicates
MIF board malfunction, and hence base station exchange).
If the problem persists, replace the top cover, or exchange the base station, as appropriate. If the display
window breaks, or is scratched and no longer readable, renew the top cover (see “Removing the Top
Cover Assembly” on page 20 and “Replacing the Top Cover Assembly” on page 21).
LEDs
If any of the LEDs fail to light when they should, reset the system (see “System Reset” on page 61). If the
problem persists, renew the top cover assembly (see “Removing the Top Cover Assembly” on page 20 and
“Replacing the Top Cover Assembly” on page 21).
Magnets
If you see something unusual in the transducer’s LCD, or if you pick up and gently shake the base station
and you can hear something moving inside, then it is likely that one or more of the three magnets has been
dislodged. To investigate further:
1
Remove the top cover assembly (see “Removing the Top Cover Assembly” on page 20).
2
Try to refit the magnet - it should snap back into place.
3
If the magnet does not snap into place, then the plastic lugs that hold the magnet are probably broken
or damaged. If this is the case, renew the top cover assembly (see “Replacing the Top Cover Assembly”
on page 21).
Factory Information Code Log
All detected hardware and software internal errors generated by the base station and the transducers are
logged in an internal log file residing in the EEPROM. The errors are mapped to a two-digit hexadecimal
Factory Information Code (FIC). The FIC is stored in the EEPROM, with the oldest code at the top of
the list and the newest at the bottom. The contents of the FIC log require no interpretation. The log file
can only be read using the Service Support Tool via the service port. The log can be saved to a file and the
file returned to the factory for debugging (see the
Service Support Tool Help for details). The log can only
be cleared manually by using the keys on the base station (see Chapter 8, “Changing Settings”).