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12. MAINTENANCE & TROUBLESHOOTING
12-3
12.4 Error Messages
The GP-1650W/1650WD 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-1650WD 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.
TEST
DGPS 3D
MEMORY•I/O TEST
TEST PATTERN
KEYBOARD TEST
RETURN
Test menu
5. Press the MEMORY•I/O TEST soft key to
start the test. Test results and program
nos. are shown as below.
PROGRAM: OK
No.14518010**
RETURN
TEST
SRAM: OK
DRAM: OK
PORT1: OK
PORT2: OK
INTERNAL
BATTERY: OK
GPS
RECEIVER: OK
No.48502060**
BEACON
RECEIVER: OK
No.08501781**
No.
: Special connections are required to check these ports.
Otherwise, "--" appears.
**: Program Version No.
Memory, I/O test results
6. The test runs continuously. To return to
the TEST menu, press the RETURN soft
key.
Note: BEACON RECEIVER results only
appear on GP-1650WD.