
The Model 401 has been designed to give reliable service over long
periods of use. These instructions have been included to enable you
to make the few minor adjustments which may become necessary
after a prolonged period.
Turntable Speed
When set to 33
1
/
3
rev/min. with the pointer of the speed adjuster
central, the lower stroboscopic turntable markings should appear to
remain stationary when viewed in the light of the neon lamp. If this is
not the case, remove the turntable, insert a suitable screwdriver
through the small hole in the base plate and turn the speed adjust-
ment screw C on Diagram 3, slightly clockwise if the speed is high
and counterclockwise if it is low. Having made this adjustment, the
other two speeds should also be correct within close limits.
If the speed adjuster does not enable the correct speed to be set
check that the position of the intermediate wheel is that specified
under the heading 'Intermediate Wheel'. Should this be satisfactory
and turntable speed is too high, slacken the large nut on the under-
side of the lug attached to the motor casting and which locks the
magnet carrier pivot. Then, inserting a screwdriver into the slot at the
lower end of the pivot A, situated on the left of the screw mentioned
in the previous paragraph, turn the pivot a fraction of a turn in a coun-
terclockwise direction. If the speed is too low turn the pivot in a clock-
wise direction. Always re-tighten the nut after making an adjustment.
If, when using the speed adjuster control, there is difficulty in obtain-
ing 'fast' turntable speed, an alternative motor pulley, identified by a
red spot, is available to increase 'fast' speed range.
adjustments
8
diagram 3
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