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2
Adjustment for automatic start and return positions
(See Fig. 27.)
Should the tonearm not function
correctly,
make adjustments
according to the following procedures.
Adjustment for automatic start position
(Remove
the rubber cap.)
In cases where the stylus
tip
descends
outside
of the record
-Rotate clockwise
.
In cases where the stylus tip descends onto halfway of a recorded
piece
-Rotate counterclokwise.
Adjustment for automatic return position
(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
-Rotate counterclockwise.
3 Speed adjustment
(with
pitch-control knobs)
(See Fig.
28.)
Strobe dots are set on the rim of the turntable platter
accord-
ing 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 knobs
either
to the
"+"
side
or
"-"
side, adjust so that the strobe dots
of the
turntabl
e
platter
look as if they were stationary. This represents the
correct
speed
.
- 8 -
50Hz
60Hz
Strobe-illuminator
Strobe dots
"+"
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.
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
af
fe
cts
the
strobe
illuminator,
the strobe
dot pattern also
seems
to fluctuate
to
a certain extent.
But the
unit is not affected by these fluctua-
tions
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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