Furuno FR-2105-B - Manual (Page 135)

-5.2-
Terminal strips and
plugs in antenna
unit Open antenna cover to check
terminal strip and plug
connections inside. Also check
the rubber gasket of antenna
covers for deterioration. When closing antenna covers in
position, be careful not to catch
loose wires between covers and
unit.
6 months to
one year CRT and
surrounding
components High voltage at CRT and
surrounding components attract
dust in environment which will
cause poor insulation. Ask your
nearest FURUNO
representative or dealer to clean
internal high-voltage
components. If CRT anode rubber cap or wire
sheath is cracked, ask your dealer
to replace it. Wait for at least 3
minutes until high voltage
components (CRT and HV
capacitors) discharge their
residual charges before accessing
them.
Terminal strips,
sockets, earth
terminal Check for loose connections.
Check contacts and plugs for
proper seating, etc.
5.2 Life Expectancy of Major Parts
Parts Type Life expectancy Remarks
Antenna motor D8G-571 (X-band) 42 rpm
D8G-516 (X-band) 24 rpm
Gears more than 10,000 h Wind load 100 kt
Magnetron MG 5241, X-band, 12 kW
MG 5436, X-band, 25 kW
MG 5223F, S-band, 30 kW
MG 5240, S-band, 60 kW
2,000 - 3,000 h
5.3 Replacement of Battery
A battery installed on the RP board or Gyrocompass board inside the display unit help preserve
the data when the power is turned off. The life of the battery is about five years. When the battery
voltage is low, NG appears at diagnostic test for RP board. Contact your dealer for replacement.
Battery Type Code number
RP board ER3s 000 127 759
GC board CR 1/2 8.L 000 103 769