Akai AP-002 - Page 9

RECORD
TYPE
17
cm
17
cm
25
cm
30
cm
HEADING
45
r.p.m.
33
r.p.m.
Last
Sound
Groove
Diameter
More
than
106
More
than
106
More
than
115.2
|
More
than
115.2
|Last
Groove
Diameter
97+1
9741
|
106.4+0.8
106.440.8
A
gear
the
same
as
the
pitch
of
MAIN
GEAR
(3)
is
installed
to
the
SHAFT
TABLE
ASSY
(1)
and
here
a
plectrum-like
part
projects
from
this
part.
Because
this
plectrum
is
for
the
purpose
of
picking
up
the
timing
of
CLUTCH-ASSY
(4)
installed
on
the
MAIN-GEAR
(3)
it
rotates
with
the
turntable
during
record
performance.
AUTO
LEVER
(9)
is
linked
to
the
PLATE-PU-ASSY
(10)
which
is
directly
connected
to
the
pick
up
arm,
and
TRIP
(5)
begins
to
be
pressed
from
about
the
time
stylus
tip
reaches
the
lead-out
groove.
The
move-
ment
of
this
AUTO-LEVER
(9)
is
about
1/6
in
relation
to
the
movement
of
the
stylus
tip.
RETURN
LEVER
(11)
is
linked
to
MAIN
GEAR
(3)
by
CRANK
LEVER
ASSY
(13)
and
reciprocal
motion
is
in
accordance
with
MAIN
GEAR
(3)
revolutions.
Then
at
the
““”slanted
portion
(hatching),
PLATE
ELEVATOR
(16)
is
raised
and
the
lifter
(at
@
mark
position)
is
elevated
and
the
arm
returned
to
the
arm
rest.
Further,
because
current
ON-OFF
switch
MINI-
SW
(12)
is
installed
on
RETURN
LEVER
(11),
this
switch
operates
to
automatically
stop
turn
table
rota-
tion
when
the
pick
up
arm
is
returned
to the
arm
rest.
Because
STOPPER
GEAR
(7)
controls
the
revolving
motion
of
MAIN
GEAR
(3),
it
operates
to
stop
rota-
tion
so
that
the
tooth
gap
part
comes
to
a
standstill
at
an
established
position
near
TABLE
SHAFT
ASSY
Q).
Also in case the record is stopped during performance,
PLATE, JOINT (13), PLATE REJECT (14) and POLE
REJECT (15) are intervened by the forward motion
of CAM REJECT LEVER, PLATE REJECT (2) oper-
ates, and CLUTCH ASSY (4) is pushed out.
1. AUTOMATIC RETURN
As
shown
in
Fig.
3
when
the
pick
up
arm
moves
to
the
record
surface,
the
PLATE-PU
ASSY
(10)
which
is
directly
connected
to
the
arm
shaft
separates
from
MINI
SW
(12),
power
source
is
turned
ON,
and
the
turntable
rotates.
As
the
pick
up
stylus
tip
traces
the
recorded
groove
of
the
record,
AUTO
LEVER
(9)
also
advances
on
the
inner
side
proportionately.
Be-
cause
this
AUTO
LEVER
advances
as
the
STEEL
BALL
(17)
on
HOLDER
BALL
(8)
rolls,
movement
is
ex-
tremely
smooth
and
there
is
almost
no
influence
extended
to
pick
up
arm
side
pressure.
In
due
time
the
pick
up
stylus
finishes
sound
groove
tracing
and
about
the
time
it
enters
the
lead-out
groove,
the
tip
of
AUTO-LEVER
(9)
begins
to
push
the
skirt
part
of
TRIP
(5)
and
the
CLUTCH
ASSY
(4)
which
rides
lightly
on
this
part
is
pushed
out
toward
the
TABLE
SHAFT
ASSY
(1)
(shown
in
Fig.
5,
when
the
pick
up
stylus
is
at
a
about
126
mm
position
from
the
turntable).
At this condition, the protruding part of the gear on
TABLE SHAFT ASSY (1) is drawn to CLUTCH ASSY
(4) and the MAIN GEAR begins to rotate (Fig. 6).
Up to now MAIN GEAR (3) had been held it a
standstill by STOPPER GEAR (7) and a smooth stop
effected by the teeth gap, but when the condition in
Fig.
6
is
assumed
the
teeth
begin
to
mesh
together
and rotating motion begins. Then as shown in Fi. 7,
this motion by means of CRANK LEVER ASSY (6)
moves RETURN LEVER (11) in the direction of the
arrow, and PLATE ELEVATOR (16) is raised and the
lifter is elevated. When pick up arm elevatin is
complete, as shown in Fig. 8, the part indicated by
broken line of RETURN LEVER (11) hits the cunion
part
attached
to
the
tip
of
PLATE
PU
ASSY
(10)
and pick up arm return commences. When the piick
up arm returns to the rest, the RETURN LEVER(#1)
by means of CRANK LEVER (6) moves in the oppsite
direction (broken arrow mark), PLATE PU ASSY
(10) returns to former position, and in due car rse
approaching MINI SW (12) is operated and the pwer
source is turned OFF so that the condition in Fg. 3
is re-assumed.
a
9