Furuno 1943C, 1933C, 1833C, 1823C Checking Magnetron Heater Voltage, Navigation Data Source, 3-11

3.4Checking Magnetron Heater Voltage

Note: This confirmation/adjustment should only be performed by a qualified service technician.

Magnetron heater voltage is formed on the PTU (1833C)/MD (1823C/1933C/1943C/1953C) Board of the antenna unit, and preadjusted at the factory. Therefore no adjustment is required. However, check magnetron heater voltage for confirmation as follows:

1.Open the antenna unit.

2.Turn on the power. Do not transmit the radar.

3.Connect a multimeter, set to 10VDC range, appropriate position on the MD (1823C), PTU (1833C) or RTB (1933C/1943C1953C) Board in the antenna unit. Refer to the table in below.

4.Confirm that the multimeter indication is appropriately.

	MODEL1823C	MODEL1833C	MODEL1933C/1943C/1953C
Check point	TP804#6 (+) and #4 (-)	TP802#4 (+) and #6 (-) on	J825#4 and #6 (GND) on
	on MD Board	PTU Board	RTB Board
Multimeter indication	7.9 to 8.1 V	7.4 to 7.6 V	7.4 to 7.6 V
Adjustment point	VR801 on MD Board	R106 on PTU Board	VR801 on MD Board

3.5Navigation Data Source

The NAV SOURCE SETTINGS menu mainly selects the source of nav data. For navigator other than the FURUNO GP-310B/320B, speed averaging and local time offset (to use local time instead of UTC time) are also available from this menu.

1.Press the [MENU] key followed by SYSTEM CONFIGURATION, NAV OPTION and NAV SOURCE SETTINGS soft keys to show the NAV SETUP menu.

POSITION SOURCE	ALL	NAV
		SETUP
SPEED AVERAGING*	0060second (s)
LOCAL TIME OFFSET*	+00:00
TEMP CALIBRATION	+00 F	EDIT
DEPTH CALIBRATION	+00ft
		RETURN

* For GPS receiver other than GP-310B/320B.

Nav setup menu

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