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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
Rating FR-2115-B (12 kW) FR-2125-B (25 kW)
ST-BY, 0.125 nm 7.4 to 7.6 V 8.2 to 8.4 V
TX, max range 7.4 to 7.6 V 6.5 to 7.5 V
1. Press [RADAR MENU] [0] [0] [0] [2] [0] to open the INITIAL SETTING2 menu.
2. Press [5] to select both the 5. SCANNER STOPPED field and the TX option and press
[ENTER]. Disconnect connector P821 from the antenna unit.
3. Turn off screen brilliance.
4. Measure voltage between pins #12(+) and #5(-) on connector P801 on the RFC Board
(03P9243) in the antenna unit.
5. If the voltage is not within the rating shown in Table 3-1, adjust potentiometer VR1 on the
RFC Board.
6. Show the INITIAL SETTING 2 menu, press [5] to select ST-BY, and then press [ENTER].
J611
J821
J801
VR1
03P9243
Figure 3-5 RFC Board