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e Arm-lift height adjustment
The
arm-lift
height
(distance
between
the
stylus tip
and the record surface when the cueing control is at the
"v"' position) has been adjusted at the factory to ap-
proximately 5 mm(3/16"). (Fig. 9)
If the clearance is too narrow or too wide (because of
different cartridge dimensions, for example), turn the
adjustment screw clockwise or counterclockwsie. (Fig. 10)
Clockwise rotation
—distance between the record and stylus tip is decreased.
Counterclockwise rotation
—distance between the ercord and stylus tip is increased.
e Adjustment of automatic start position (Fig. 11)
Note:
The
auto-start
and auto-return
adjustment
screws
are
located together. (Fig. 11)
When the tonearm is in or near the arm reat, the auto-
start adjustment screw is visible; when the tonearm is
near the center of a record, the auto-return adjustment
screw is visible. (Fig. 12)
Auto-start position is the point where the stylus starts
playing the record during automatic operation.
If the stylus does not land in the lead-in groove, adjust
as follows.
1. Clamp the tonearm to the arm rest.
2. Take the rubber cap off.
Turn
the
screw
with
a screwdrive,
clockwise
or
counterclockwise as necessary.
3. If the stylus lands too far in, turn counterclockwise.
4. If the stylus descends outside the record, turn clock-
wise.
5. Adjust so the stylus tip lands 1~2 mm
in from the
edge of the record.
e Adjustment of automatic return position (Fig.
(Remove the rubber cap.)
1. Put the stylus protector on the cartridge.
2. Remove the tonearm toward the center of the record.
Then, the auto-return adjustment screw will appear.
If the tonearm tends to return to the arm
rest before
the play has finished.
—turn counterclockwise.
If the tonearm fails to return after the final groove.
—turn clockwise.
12)
Approx. 5 mm(3/16"')
Rubber wolff
Auto-start
\
adjustment screw |
screw |
SL-B303
SL-B303
HM
MEASUREMENTS AND ADJUSTMENTS sees
English Se
@ Overhang adjustment (Fig. 13)
15 mm is the correct overhang for this tonearm.
Loosen
the screws
and move
the cartridge forward
or backward
until
the distance
between
the stylus tip and the plug becomes
52 mm (2-3/64").
Tighten the screws without moving the cartridge.
Adjust
the
horizontal
zero
balance,
stylus
pressure
and
armlift
height whenever you change the cartridge.
e Adjustment of rotational speed
When
the hall IC (1C101) or the variable
resistors
(VR1,
2) are changed,
or if the rated rotation is not
reached
even
when
the pitch control
knob is turned,
adjust the rotational speed in the following procedure.
1. Place the set on a player repair bench.
2. Turn the pitch control
knob to the center position,
and put on a record disc for playing.
3. Push the speed selector switch to 33-1/3 r.p.m.
(See Fig. 14)
4. Turn
the VR2
with a screw driver from the lower
part of the set to the rated rotation (33-1/3 r.p.m.)
and check the rotation with a strobe while adjusting
the speed. (See Fig. 15)
5. Push the speed selector switch to 45 r.p.m.
(See Fig. 14)
6. Turn
the VR1
with a screw driver from the lower
part of the set to the rated rotation (45 r.p.m.) and
check the rotation with a strobe while adjusting the
speed. (See Fig. 15)
(See Fig. 16)
Fig. 16
Fig. 13
Fig. 14
Bottom board
Drive circuit P.C.B.
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