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12. MAINTENANCE & TROUBLESHOOTING
12-3
12.4 Error Messages
This GP-1850W/1850WD displays the
following error messages on the alarm menu
to alert you to possible trouble.
Error messages
Error Message Meaning, remedy
NO GPXS FIX
No GPS signal. Check
antenna cable.
NO DIFFERENTIAL
GPS
CORRECTION.
(GP-1850WD only)
No DGPS signal. Check
antenna.
VOLTAGE OF
INTERNAL
BATTERY IS LOW.
Voltage of internal
battery is low. Request
replacement of battery.
12.5 Diagnostic Tests
Memory, I/O port test
This test conducts a general check of the
display unit and the antenna unit. The unit
displays the results for each device or
component checked as OK or NG (No
Good).
1. Press the [MENU] key to open the main
menu.
2. Press the CONFIGURATION soft key to
show the CONFIGURATION menu.
CONFIG
DGPS 3D
SETUP NMEA PORT 1
UPLOAD/DOWNLOAD DATA
SETUP NMEA/DGPS PORT 2
SYSTEM MENU
RETURN
Configuration menu
3. Press the SYSTEM MENU soft key to
open the SYSTEM menu.
SYSTEM
MENU
DGPS 3D
SELF TEST
MEMORY/TRIP CLEAR
DEMONSTRATION MODE
RETURN
System menu
4. Press the SELF TEST soft key to open
the TEST menu.