Koden Electronics RB716A Marine Radar RA42C User Manual 19

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Document ID	111154
Application ID	6Ou33n0ICktRTTZP9OuBvQ==
Document Description	19
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Microsoft Word - pdf
Filesize	8.72kB (109057 bits)
Date Submitted	2000-07-30 00:00:00
Date Available	2000-12-12 00:00:00
Creation Date	2000-07-31 14:33:50
Producing Software	Acrobat Distiller 4.0 for Windows
Document Lastmod	2000-07-31 14:33:51
Document Title	19

CHAPTER 6. MAINTENANCE AND INSPECTION
Most of maintenance of this radar should be referred to qualified personnel. If
radar has any problem, contact your dealer and tell us that problem.
WARNING
There are high voltage circuits inside of this radar.
Do not attempt to open the rear cover of display
unit or disassemble internal parts. When you open
the radome, power must be off.
Even power switch is OFF, this radar is still supplied power inside.
The following table shows the maintenance by user. Please check periodically.
Tab. 6-1 Maintenance
Inspection Interval
3-6 months
6-12 months
Inspection Item
Rust and looseness
in scanner unit
Display screen of
LCD display
Grease* application
to antenna drive
gear
Check for contact
of connectors
Antenna motor
brush(RA42C)
Method of Inspection and Maintenance
Check whether the scanner’s fitting bolts are
corroded or less.
Clean filter and LCD screen surfaces with a
soft and wet cloth.
Apply an even coating of grease* to the entire
surface of the antenna drive gear with a spatula or brush.
Check whether connectors are contacted
properly. If any connector is improperly contacted or stained, correct it by using a contact
restoring chemical agent or by polishing or
replace with a new one if necessary.
Check the length of brushes. If the length is
under 6mm, change them to new one.
*: Use grease for plastics for RA40C/41C. If you use other type of grease(not for plastics),
it may break antenna
Concerning Consumable
The radar uses consumable as listed below that require periodic replacement.
(1) Magnetron
This part is mounted in the scanner unit. If distant echo images have
become less visible, the magnetron probably may have degraded. In such a
case, replace it. Consult your distributor for replacement of this part.
Period of the replacement : 3000hour(typ.) (500hour guarantee)
(2) LCD back-light
This part is mounted in the display unit. If the display screen is extremely dark and its illumination cannot be corrected by adjusting brightness, the LCD back-light may be faulty or may have burnt out. In such a
case, replace it. Consult your distributor for replacement of this part.
Period of the replacement : 15000hour(typ.) (1000hour at 0•)
79
(3) Fuse
The fuse is built in
the power supply cable.
If the fuse appears to be
blown, check the fuse. If
blown,
replace
it
following the procedure
shown in Fig.6-2.
Power supply cable
To display unit
Push
Wire(White)
Turn counterclockwise
and pull
Spring
Fuse
Replace new fuse
Push and turn clockwise
Fig. 6-2 Method for replacing fuse
Note: Before maintenance of scanner, you can hang a radome(upper) using cord
through hole as follows.
Cord
A: Top view
Hole
Radome(bottom)
Fixing screw
Cord
Radome(Upper)
Fig. 6-3 Method for replacing fuse
80

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