Furuno FR-2155 - Manual (Page 38)

3-4
3.7 Confirming Magnetron Heater Voltage
Magnetron heater voltage is adjusted at the factory using a 15 m signal cable.
Therefore, when the length of the cable is other than 15 m, confirm that magne-
tron heater voltage is within the prescribed rating as follows:
1. Turn on the radar and 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. Turn off the antenna switch in the display unit.
ON
OFF
PM
ANTENNA
TUNE
DEGAUSS ERROR
ANTENNA
switch
Figure 3-5 Antenna switch in tuning compartment
4. Turn off screen brilliance.
5. Transmit on the 0.125 nm range.
6. Connect a multimeter, set to the 10 VDC range, between #1(+) and #2(-) of
J829 in the scanner unit.
7. Adjust the position of the sliding contact R812 to show a value between 7.0 V
and 7.5 V on the multimeter.
8. Remove the TX-HV fuse (F801, 0.5A) from the power supply unit for the scan-
ner unit.
9. Transmit on maximum range.
10.Adjust the position of the sliding contact R811 to show a value between 4.5 V
and 5.0 V on the multimeter.
11.Insert TX-HV fuse F801.
12.Press [RADAR MENU] [0] [0] [0] [2] [0] [5] to select the 5. SCANNER STOPPED
field and the TX option.