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3. INSTALLATION
29
3.5 Magnetron Heater Voltage
Magnetron heater voltage is formed at the
MD Board of the antenna unit and is
preadjusted at the factory. Therefore, no
adjustment is required. However, verify the
voltage as below.
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
DO NOT attempt the
procedure below unless
totally familiar with electrical
circuits.
1. Open the antenna cover and open the
shield plate.
2. Turn on the power. DO NOT transmit.
3. Connect a multimeter, set to 10 VDC
range, between #6 (+) and #4 (-) of test
point TP804 on the MD Board.
TP804
VR801
MD board
4. Confirm that the multimeter shows 8.0 V
±0.1 V. If it does not, adjust potentiometer
VR801 on the MD Board.
5. Turn off the power.
6. Fasten the shield plate.
7. Close the antenna cover.
36


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