Confirming Magnetron Heater Voltage - Furuno FR-2135S Installation Manual

3.7 Confirming Magnetron Heater Voltage

Magnetron heater voltage is adjusted at the factory. Confirm that magnetron heater
voltage is within the prescribed rating as follows:
1. Turn on the radar and select the 0.125 mile range.
2. Press [RADAR MENU] [0] [0] [0] [2] [0] to
open the INITIAL SETTING2 menu.
3. Press [5] to select the 5. SCANNER
STOPPED field and the TX option.
4. Turn off the antenna switch in the display
unit.
5. Connect a multimeter, set to the 10 VDC
range, between #12(+) of P801 and the
chassis.
6. The multimeter should read 9.2-9.4 V. If not,
adjust VR1.
7. "Transmit" on the 48 mile range.
8. The multimeter should read 7.3-8.3V.
9. Press [RADAR MENU] [0] [0] [0] [2] [0] [5]
to select the 5. SCANNER STOPPED field and the ROTATE option.
10.Turn on the ANT MOTOR SW on the scanner unit.
Figure 3-6 Scanner unit, bow view
3-4
ON
ANTENNA
switch
OFF
ANTENNA
TUNE
DEGAUSS ERROR
Figure 3-5 Antenna switch
in tuning compartment
PM