Garmin APOLLO GX SERIES Service Manual - page 119
Garmin AT
Rev --
© 2004 Garmin AT
GX Service Manual
8-23
18. Turn the large knob clockwise to CH RX TX screen. This is where serial port settings are
entered. The screen should display NONE for RX and NONE for TX. If it shows GPS and GPS, go
back to step 6 of this procedure and continue from there. If that doesn’t solve the problem,
perform steps 6, 7,8 and 9 above and press ENTER at the RESET ALL screen. If that doesn’t
resolve the problem, replace the NAV board (see NAV Board Replacement procedure) and
perform the Complete Initialization procedure. Return the unit to the factory if that fails to correct
the problem.
19. Cycle power and let the unit go through its self-test and startup procedure.
20. Using the Service Data Sheet, reenter the customer configuration.