Raytheon Pathfinder 1200 Instruction Manual page 47

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2)
LOCK NUT
MECHANICAL KNOB
ADJUSTING THE MECHANICAL
KNOB WITH TUNING METER
Fig. 5-1 GUNN OSCILLA TOR TUNING
Beam centering adjustment on the CRT (See Fig. 5-2)
a. Remove the cover from the Display Unit
b. Loosen the locking screw on centering magnet and rotate the two knobs simul-
taneously or individually so that the beam center coincides with the center of
cursor line.
c. After adjustment, tighten the locking screw of centering magnet.
Note: A parmanent magnet, is mounted behind the deflection coil and consists of two doughnut
shaped plates.
3) Intensity adjustment
a. Remove the cover from the Display Unit.
b.
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CRT BRIL
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push highest position.
c. Adjust RV4 (INTENSITY ADJ) so that PPI is suitable brightness.
4) Focus adjustment
a. Remove the cover from the Display Unit.
b. Adjust VR203 (Display Sub PCB) so that the sweep line, rings and targets on the
screen are as small and clear as possible.
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