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■ ADJUSTMENTS
Adjustment of the arm-lift height
(See Figs. 5 and 6.)
The arm-lift height (distance between the stylus tip and
record surface when cueing lever is raised) has been adjusted
at the factory before shipping to approximately 5 to
10 mm.
If the clearance becomes too narrow or too wide, turn the
adjustment screw clockwise or counterclockwise, while
pushing the arm lift down.
Clockwise rotation
—distance between the record and stylus tip is decreased.
Counterclockwise rotation
—distance between the record and stylus tip is increased.
Note:
As the adjusting screw has a hexagonal head, be sure to
make the adjustment while depressing the arm lift, or the
screw will not move freely.
Also be sure that the hexagonal head retracts correctly
into the arm lift when the latter is released.
5-10 mm (3/16-25/64")
Adjustment for automatic return position
(See Fig. 7.)
(Remove the turntable mat.)
In cases where the tonearm tends to return before the
playing has finished.
-rotate clockwise
In cases where the tonearm fails to return after the last
groove of the record has been played.
—rotate counterclockwise
Tonearm-return
adjustment screw
Fig. 7
Speed adjustment (with pitch-control knob)
(See Fig. 8.)
Strobe dots are set on the rim of the turntable platter
according to the power-line frequency and the speed of the
records.
Make adjustment, referring to the strobe-dot
indication.
1. Set the speed select knob to the speed to be adjusted.
2. Release the arm clamp and move the tonearm toward the
record.
The strobe-illuminator/pilot lamp will light up and the
turntable platter will rotate.
3. While turning the pitch-control knob either to the "+"
side or
side, adjust so that the strobe dots of the
turntable platter look as if they were stationary. This
represents the correct speed.
"+" direction
The speed of the turntable platter will increase. Turn the
knob in this direction if the strobe dots seem to be
"falling back", i.e. seem to be moving counterclockwise.
When the dots appear to be stationary, turntable speed
is accurate.
" direction
The speed of the turntable platter will decrease. Turn
the knob in this direction if the dots seem to be "running
ahead", i.e. seem to be moving clockwise, until they
appear stationary.
Moreover, the speed fine control knob can be used both
for 33-1/3 rpm and 45 rpm.
Adjustment is to be made according to the selected
speed (33-1/3 rpm or 45 rpm).
Note:
Strobe dot pattern
The strobe-illuminator/pilot lamp of this unit employs
the standard commercial power source. The frequency
of such power source, when actually measured, has a
fluctuation of about 0.2%.
As such a fluctuation of the power source affects the
strobe illuminator, the strobe dot pattern also seems to
fluctuate' to a certain extent. But the unit is not affected
by these fluctuations of the power source, since a DC
motor is employed.
In other words, rotation of the platter will be constant,
and slight shifts in the movement of the dots simply
reflect normal drift in the power-source frequency.
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Fig. 8'
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