PM790 Radio Maintenance Manual
All rights reserved. No spreading abroad without permission of Caltta.
37
6.7GPS Failure
GPS
Failure
Is the GPS
antenna normal?
Yes
No
Replace the
GPS antenna
No
Replace the
main PCB
Is the work area
blocked from receiving
GPS signal?
Is GPS normal
after changing to
open area?
Yes
No
6.8Control Panel Troubleshooting
6.8.1 LCD No Display
LCD No Display
Is the 50pin FPC
in poor contact?
Yes
No
Replace the
keypad
Can LCD display
normally after replacing
control header module?
No
Replace the
main PCB
Yes
Re-plug the
FPC and
retry
Summary of Contents for PM790
Page 1: ...1 PM790 Radio MAINTENANCE MANUAL Level1 V1 0...
Page 2: ......
