Magnetron Heater Voltage - Furuno 1751 Operator's Manual

6. INSTALLATION
Adjustments
Magnetron heater voltage
Magnetron heater voltage is formed at the MD Board of the scanner unit and preadjusted at
the factory for use with any length of interconnection cable. Therefore no adjustment is
required. However, verify heater voltage by the following.
1. Connect amultimeter, set to 10 VDC range, between #3( +) and #2(-) of test point "rP804
on the MD Board.
2. Confirm that the multimeter shows 8.0 V ±0.1 V, If not, adjust potentiometer VR801 on
the MD Board.
Test Point
TP804
Potentiometer
VR801
MD Board
U F'lioio No,7976
Figure 6-23 Inside of Scanner Unit