JVC L-A31 User Manual

4. Operation of Automatic Mechanism
Char. evcle mechanism:
Ter:
“aying, the notch of the main gear. position
relative to the turntable spindle gear is as shown in Fig.
4. As the projection is away from the engagement, the
main gear does not rotate even though the turntable.
. As playing proceeds, the trip slide moves toward the
center of the turntable following the movement of the
tonearm. .
. The engagement is very easy to move as it simply rests
on the lower trip. On the music section of the record
groove the engagement moves so slightly that it is re-
turned by the tip of the projection. Consequently, the
turntable spindle gear does not engage with the main
gear and thus does not trigger the auto-return operation
as shown in Fig. 5.
. When playing ends and the pick-up cartridge enters the
lead-out groove which is paced out, the engagement
advances more then it is returned by the projection.
Because of this, the engagement is pressed by the pro-
jection zs shown in Fig. 6, causing the main gear to turn
and engage with the turntable spindle gear. Thus the
change cycle is started.
. During zne return operation the engagement and lower
trip which have moved are returned to their original
position by the reject button coming into contact with
the bottom of the lower trip. At this moment the switch
lever operates with the help of the main gear cam,
switching off the power just before the rotation should
stop.
This completes the automatic cycle.
Tonearm lift and return mechanism:
1.
5.
Cartridge-Replacement—
&
os
eee
. Unscrew the connector screw to remove the headshell,
. Remove the two long screws on the headshell which
—_
When the main gear starts to rotate at the end of play-
ing, the return lever rotates under the action of the
main gear cam to press the elevazor cam. The upward
movement of the elevator cam is cirectly converted into
movement of the elevator, lifting up the tonearm. (Fig.
7)
. The tonearm is returned by the arm lever the end of
which pressesit as the main gear rotates.
hold the cartridge. (Fig. 8)
. Connect the lead wires of the headshell to the new
Cartridge, being careful to match the polarities correctly,
Polarity and wire colots are as eNews:
White (+)....... L = Red (+). rR. le aS
Blue (-)........ R Green). ee RE Ee
. Attach the cartridge to the headshell ran, and
gently tighten the screws.
. Set the cueing button to “DOWN”, and then bring the
stylus tip to the optimum position by sliding the car-
tridge back and forth. See 6-(1) Cverhang Adjustment.
. After atzaching the cartridge, siide the headshell into the
tonearm. Tighten the connector screw.
. Be sure to adjust the tracking force and lead-i -in position
after reptacing the cartridge.
t
andl
P-ojection
_ Platter Spindle eee
Engagement
Platter Gear
- Fig. 4
Fig. 5 Fig. 6
Return Lever
Elevator Cam
Fig. 7
Plastic ;
Washer D
iK,
IN/o. 4.
! Cartridge
L-Agh
Yn DREF

JVC L-A31 Specifications

General

Brand	JVC
Model	L-A31
Category	Turntable
Language	English