Furuno NAVNET 1933C-BB - Manual (Page 55)

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3.4 Checking 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-BB)/MD (1823C-BB/1933C-BB/
1943C-BB/1953C-BB) 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 10 VDC range, on the MD (1823C-BB), PTU (1833C-BB) or
RTB (1933C-BB/1943C-BB/1953C-BB) Board in the antenna unit, referring to the table
below.
4. Confirm that the multimeter indication is as shown in the table below.
MODEL1823C-BB MODEL1833C-BB
MODEL1933C-BB/
1943C-BB/1953C-BB
Check point
TP804#6 (+) and #4 (-)
on MD Board
TP802#4 (+) and #6 (-) on
PTU Board
J825#4 and #6 (GND) on
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
3.5 Navigation 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 E: SYSTEM CONFIGURATION, B: NAV OPTION
and A: NAV SOURCE SETTINGS soft keys to show the NAV SETUP menu.
NAV
SETUP POSITION SOURCE ALL
SPEED AVERAGING* 0060second (s)
LOCAL TIME OFFSET* +00:00
TEMP CALIBRATION +00 F
DEPTH CALIBRATION +00ft
* For GPS receiver other than GP-310B/320B.
E RETURN
A EDIT
Nav setup menu