Chapter 4. Maintenace; Remarks On Replacement Of Major Parts - Furuno 1932 MK2 Service Manual

4.1

Remarks on Replacement of Major Parts

Turn off the power before replacing any parts
Do not touch the magnetron while the radar is transmitting. Sufficient high voltage exists at the
magnetron to cause death.
MAGNETRON
The magnetron emits a strong magnetic field. For this reason, remove wristwatch before
performing the replacement and use a non-magnetic screwdriver to dismount the magnetron. The
estimated life of the magnetron is 2000 hours, (including time in stand-by), however actual life
depends on usage.
1. Turn off the power.
2. Dismount the transceiver module.
3. Dismount and replace the magnetron.
4. When a new magnetron is fitted, allow at least 30 minute pre-heating under ST-BY. Turn on the
power and measure magnetron current. See Chapter 3 for heater voltage rating and
potentiometer to adjust.
5. Transmit on long range and measure magnetron current. See Chapter 3 for magnetron current
rating and potentiometer to adjust.
6. Reset "TX Hours" and "On Hours" on INSTALLATION SETUP menu. See page 4-3 for how to
access this menu.
MIC
The MIC can be replaced individually. No adjustment is necessary after replacement.
SPU Board
Write down settings of MAIN and INSTALLATION menus before replacing the board. Then, after
replacing the board, reenter settings. (Reason: Settings are stored in the E2PROM (U48) on the
SPU board.)
IMPORTANT!
After replacing the SPU board, the factory menu setting must be carried out properly,
otherwise the MIC will be damaged.

Chapter 4. MAINTENACE

4-1