NT-2000 REF Manual
User-Level Maintenance
6-1
6 . U s e r – L e ve l M ai n t en a n c e I n s tr u c t i o n s
To ensure long–term trouble–free operation, the user should regularly follow the
maintenance instructions described in this section.
6 . 1 .
M a i n t e n an c e o n th e E q u i p m ent C a b i n e t
Keep the equipment, away from sea splashes, direct sunlight and other heat–generating
sources, and make sure that air around the cabinet is circulating freely. If the
equipment is not going to be used for extended periods of time, dismount the cabinet
from the vessel and place them in dry storage. Be sure to switch the equipment off
before removing electrical connections from the rear panel.
< WARNINGS >
1. HIGH VOLTAGES EXIST INSIDE THE EQUIPMENT CABINET WHEN IT IS
ENERGIZED. BE SURE TO TURN IF OFF AND UNPLUG THE POWER CABLE
BEFORE OPENING THE CABINET FOR INSPECTION.
2. CHEMICAL SOLVENTS, SUCH AS PAINT THINNERS AND BENZENES, MUST
NOT BE USED TO CLEAN THE CABINET OR SCREEN FILTER, OR
PERMANENT DAMAGE TO THOSE PARTS WILL RESULT.
3. ALL MESSAGES STORED IN MEMORY, INCLUDING PROTECTED ONES, WILL BE
ERASED IF THE UNIT IS TO BE TURNED OFF CONTINUOUSLY IN EXCESS OF 10
DAYS. IMPORTANT MESSAGES SHOULD BE PRINTED OUT OR SAVED INTO AN
APPROPRIATE STORAGE MEDIA VIA A PC CONNECTED TO THE RS–422 PORT.
To clean the cabinet surface, a neutral type household detergent intended for office
equipment is recommended. Cleaning the acrylic filter on the LCD screen should be a
maintenance routine to avoid using a high brightness level. To clean the screen filter,
use a piece of slightly wet cloth. If stains persist, the cloth may be moistened with a
neutral type household detergent.
To prolong LCD Screen’s Service Life
To increase the service life of the LCD screen (life of the fluorescent lamp for
backlighting), it is recommended that the screen sleep mode be activated as per the
instructions in paragraph 4.5.
6 . 2 .
M a i n t e n an c e o n E l ec t r i c al Con n e c ti o n s
The high humidity marine environment can cause electrical contacts in the rear panel
connectors to corrode over time. Vibrations and shocks normally encountered on the
vessel in motion can cause the electrical contacts to become loosened. Corroded or loose
contacts will become responsible for erratic, intermittent operation or performance
degradation. To avoid such possible problems, conduct the following maintenance
operations at least once a year:
●
Unplug all the cables from the rear panel, and check to be sure that contact surfaces,
including the pins in the rear–panel mounted receptacles are free from corrosion.
●
Check the connections at the ship’s DC power source for freedom from any sort of
corrosion.
●
Correct any problem using a high quality contact–cleaning agent (contact
rejuvenator).
< WARNINGS >
1. BE SURE TO TURN THE EQUIPMENT OFF BEFORE REMOVING / INSTALLING
THE CONNECTIONS FROM / TO THE REAR PANEL CONNECTORS.
2. SANDPAPER WILL DAMAGE THE CONTACT SURFACE AND MUST NOT BE
USED.
