4. MAINTENANCE, TROUBLESHOOTING
4-7
4.7 Replacement
of
Fuse
The 3 A fuse on the POWER Board inside the processor unit protects the
equipment from overcurrent and reverse polarity of the power supply. If the fuse
blows, have a qualified technician check the set and replace the fuse.
CAUTION
Use the proper fuse.
Use of a wrong fuse can cause fire or
damage to the equipment.
4.8 Error
Messages
The alarm sounds for equipment error and is accompanied by a flashing
exclamation mark ( ). Press any key to silence the alarm. The exclamation
mark remains on the screen until the cause for error is eliminated. Find the
cause for the alarm(s) as follows:
1. Press the [MENU] key to open the menu.
2. Choose MESSAGES and press the [ENT] key.
MESSAGES
GPS DATA ERROR!
Message display
3. Press the [DISP] key to close the menu.
Error messages
Error Message
Meaning
Remedy
ABORTING!
GPS heading error continues for
one minute. For example, satellite
cannot be acquired because of
unfavorable environment.
Check for obstruction.
ABORTING CALC!
GPS signal interrupted for one
minute
Press any key to try to restore
normal operation.
BACKUP ERROR!(DISP) Corrupted backup data found in
display unit at power on.
Default settings are
automatically restored.
BACKUP
ERROR!(PRCSSR)
Corrupted backup data found at
processor unit at power on.
Default settings are
automatically restored.
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