Furuno FR-2115-B Confirming Magnetron Heater Voltage, Magnetron heater voltage rating

3.7Confirming 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

J801

VR1

J821

Figure 3-5 RFC Board

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