10. MAINTENANCE, TROUBLESHOOTING
10-2
10.2
Fuse Replacement
The fuse (type: FGBO-A 125V 3A PBF, code no.: 000-155-850-10) in the power cable
protects against overvoltage and equipment trouble. If you cannot turn on the power,
first check the fuse. If the fuse has blown, replace the fuse with the specified fuse. If
the fuse blows again after replacement, contact your dealer.
10.3
Troubleshooting
This section provides simple troubleshooting procedures which the user can follow to
restore normal operation. If you cannot restore normal operation, do not attempt to
check inside the unit. Any trouble should be referred to a qualified technician.
Symptom
Remedy
You cannot turn on the power. • Check for damaged power cable and connector.
• Check if the power cable is firmly fastened.
• Check the battery for proper voltage output.
• Check if the fuse in the power cable has blown.
No picture appears.
Adjust the brilliance using the
BRILL
key.
There is no response when a
key is pressed.
Turn off and on the power. If no change, ask your dealer.
Position is not fixed.
• Check if the antenna connector is firmly fastened.
• Check the number of satellites on the integrity display.
If there are two or less, check for obstructions between
antenna unit and satellites.
• Clear the GPS memory on the [8 System Setting] -
[9 Clear Memory] - [2 Clear GPS] menu.
Position is wrong.
• Check if the correct geodetic chart system is selected
on the [8 System Setting] - [5 GNSS] - [5 Datum]
menu.
• Enter the position offset on the [8 System Setting] -
[4 Correction, Offset] - [1 Position Offset] menu.
Bearing is wrong.
Check the magnetic variation on the [8 System Setting] -
[2 Plotter] - [2 Magnetic Variation] menu.
Data are not transmitted to
external equipment.
• Check if the data format is correct on the [7 I/O] menu.
• The TX interval may be set to off. Select the proper in-
terval.
• Check the appropriate settings on the external equip-
ment.
• Check the connections:
GP-170 External equipment
TD4-A RD4-A
TD4-B RD4-B
WARNING
Use the proper fuse.
A wrong fuse can damage the equipment
and cause fire.