Furuno MARINE RADAR 1823C - Manual (Page 49)

3-5
3.3.1 ANTENNA TYPE
Select the antenna type connecting with your display unit. Default setting is “F”.
Select the antenna type referring to the table shown below.
After selection, press the [ENTER] knob or ENTER soft key.
Your unit Setting
MODEL1823C A
MODEL1833C B
MODEL1933C F
MODEL1943C G
MODEL1953C H
3.3.2 TUNING
MODEL 1953C: Go to “Tuning for 1953C power supply unit”, and then “Antenna tuning”
Other models: Go to “Antenna tuning”.
Tuning for 1953C power supply unit
For MODEL 1953C, first of all tune the power supply unit to adjust the point of tuning
indicator.
1. Open the power supply unit cover.
2. On the RADAR SETUP menu, select STOP at ANTENNA ROTATION.
3. Close the menu, and then transmit the radar with the range more than 6 nm.
4. Flip the SW1 on the POWER Board to upward (for tuning position).
5. Adjust R36 potentiometer clockwise so that CR13 LED lights in the highest brilliance.
Also adjust R36 so that the voltage becomes the largest by using a multimeter. (TP5: +, TP2: -)
6. Flip the SW1 to downward (normal position, default setting).
7. Reassemble the power supply unit.
8. Go to the “Antenna tuning” on the next page.
R36
POWER Board
19P1006
CR13
SW1
TP5
Upword
Downward
TP2
Power supply unit, cover removed