7 confirming magnetron heater voltage – Furuno FR-2125V User Manual
Page 38
3-4
3.7 Confirming Magnetron Heater Voltage
Magnetron heater voltage is adjusted at the factory. However, confirm that it is
within the prescribed rating.
Table 3-1 Magnetron heater voltage rating
g
n
i
t
a
R
)
W
k
5
2
(
V
5
2
1
2
-
R
F
m
n
5
2
1
.
0
,
Y
B
-
T
S
V
4
.
8
-
V
2
.
8
e
g
n
a
r
x
a
m
,
X
T
V
5
.
7
-
V
5
.
6
1. Press [RADAR MENU] [0] [0] [0] [2] [0] to open the INITIAL SETTING2 menu.
2. Press [5] to select the 5. SCANNER STOPPED field and the TX option.
3. Disconnect connector P821 from the antenna unit.
4. Turn off the ANTENNA switch in the tuning compartment in the display unit.
PM
ON
OFF
✂
TUNE
DEGAUSS ERROR
✂
ANTENNA
switch
ANTENNA
Figure 3-4 Antenna switch in tuning compartment
5. Turn off screen brilliance.
6. Measure voltage between pins #12(+) and #5(-) on connector P801 on the
RFC Board (03P9243) in the antenna unit.
7. If the voltage is not within the rating shown in Table 3-1, adjust potentiometer
VR1 on the RFC Board.
J611
J821
J801
VR1
03P9243
Figure 3-5 RFC Board
8. Set 5. SCANNER STOPPED on the INITIAL SETTING2 menu to ST-BY.