MCS 6710 - Turntable Adjustments; Arm-Lift Height Adjustment; Automatic Start Position Adjustment; Automatic Return Position Adjustment

@ Adjustment of arm-lift height
(See Figs. 20 and 21.)
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
15 mm (19/32”’).
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.
15 mm (19/32’’)
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.
@ Adjustment for automatic start position
(See Fig. 22.)
(Remove the rubber cap.)
In cases where the stylus tip sets down outside of the
record
—rotate the screw clockwise.
In cases where the stylus tip sets down too far in the
recorded groove
—rotate the screw counterclockwise.
@ Adjustment for automatic return position
(See Fig. 22.)
(Remove the turntable mat.)
In cases where the tonearm tends to return before the
playing has finished.
—rotate the tonearm adjustment screw clockwise.
In cases where the tonearm fails to return after the last
groove of the record has been played
—rotate the tonearm adjustment screw counter-
clockwise.
Ne anmM=Sta ita ws
adjUStmentiscrewaaa®
WOnealmenetunn)
@ Speed adjustment
(with pitch control knob)
(See Fig. 23.)
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 with the cueing lever in the up position.
The strobe-illuminator/pilot lamp will light up and the
turntable platter will rotate.
In the U.S., or 120 V AC, the strobe-dots should be
measured or the 60 Hz level.
. 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 counter-
clockwise. 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 pitch control knob can be used for both
33-1/3 rpm and 45 rpm. Adjustment is to be made
according to selected speed (33-1/3 or 45 rpm).
45rpm
33'/3 rpm
45 rpm
33'/3 rpm
SEAS S
Strobe-illuminator
/pilot
lamp
CR
bcs
Strobe dots
The strobe dots for 60 Hz,
33-1/3 rpm seem to be 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 fluctuaiton 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.
Special Note:
In the USA use 60 Hz line for 33-1/3 rpm and
45 rpm. The bottom line is used for 33-1/3 rpm
when adjusting the strobe and the next line up is
used for 45 rpm when adjusting the strobe. The 50
Hz is use in European countries.