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2. Stop
Stop
operation
starts
if the
START/STOP
button
is
pressed when the tonearm is in the ''play'' position (not
on the rest).
Operation (See Fig. 2).
2-(2)
Lead-in Mechanism
When the change cycle starts and the main gear rotates,
the drive plate is moved
to rotate
the elevator
cam
as
shown in Fig.3.
As the elevator cam rotates with the linear motion of drive
plate in direction
''a'', the
elevator is pushed up by the
sloping part of the scaie: cam to lift the tonearm, at this
motion the lead-in lever moves from the position as shown
in Fig.4 to the position as shown in Fig.5.
At the end of the linear motion of the drive plate in direction
"'a'', stud B (mold) of the lead-in lever enters the cam hole
in ane chassis base, then the lead-in lever rotates in direc-
tion ''c'', and arm lever stud
is holded between lead-in
lever and case as shown
in Fig. 5, and the drive plate
moves in direction ''b''. Arm lever stud
moves with
the drive plate to move the tonearm onto the record.
According
the SIZE button
setting
(17 or 30 cm), the
tonearm
will be moved to the predetermined
position on
the record. Part
of the arm lever (See Fig. 6) contacts
the index stopper (17 or 30 cm) and this determines the
lead-in position, then the lead-in lever returns in direction to
the initial position.
To adjust the arm lever position (lead-in position), screw
the eccentric adjuster.
2-(3)
Change Cycle Start Mechanism
During play, the relationship between the main gear notch
and the platter spindle gear is as shown in Fig. 7. Since the
projection is apart from the engagement, the main gear is
stationary even when the platter is rotating. As play pro-
ceeds, the arm lever pushes the trip lever and this moves
the
lower
trip which,
in turn,
gradually
drives
out the
engagement
mounted
on the lower trip. The relationship
between the engagement and the projection at this time is
as shown in Fig. 8. When the pitch of the record groove is
small, the pitch of engagement advance is also small and
the engagement will be pushed by the projection. The main
gear, therefore, remains stationary.
At the end of play, when the tonearm comes to the leadout
groove
having a larger pitch, the engagement
advances
more than the projection pushes it back and their relation-
ship is now as shown in Fig. 9. The projection pushes the
engagement,
the main gear starts to turn, the main gear
notch moves and the platter spindle gear engages with the
main gear. Thus, the change cycle starts as the main gear
Starts to turn.
When the main gear stops turning, the relationship shown
in Fig. 7 is restored and the main gear remains stationary
even when the platter spindle gear turns.
Elevator Cam
Lead-in Lever
trip lever is driven and the 'change cycle"' starts.
In the change cycle, the off lever prepares for locking
boss
of the switch lever by spring (F). At the end
of the change cylce, boss
of the off lever is pushed
by part
of the drive plate. In this way, the switch
lever returns to its initial position and the microswitch
switches OFF. The series of operation ends in this condi-
tion.
Tonearm
Elevator
Arm Lever Stud
@)
Case
Base Cam
Case
Tonearm
Shaft
Fig. 3
Fig. 4
Arm Lever Stud @)
Case
Base Cam
17 cm Stopper
Arm Lever
17 cm
Index
30 cm
30 cm Stopper
Fig. 5
Fig. 6
On the other hand, the driven out engagement and lower
trip are pushed back to their initial positions by the edge of
the platter spindle gear just before the main gear stops tur-
ning. The cam of the main gear pushes the trip lever back
to its initial position earlier than the engagement and lower
trip. The return position can be fine-adjusted to start earlier
or later by screwing the adjuster.
Projection
Lower Trip
Platter
Spindle Gear
Engagement
Main Gear Notch
Fig. 7
Fig. 8
Fig. 9
Projection
Main Gear
Trip Lever
Arm Lever
Me
ad
0
Lower Trip
y ¢
> vin 1S
Engagement
ec
QL-F300
ee
No. 2650
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