Operation Of Automatic Mechanism; Start/Stop Mechanism - JVC QL-F300 Service Manual

Quartz locked fully-automatic turntable
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2. Operation of Automatic Mechanism
2-(1)
Start/stop Mechanism
1. Start
If you press the START/STOP button when the tonearm
is on the rest, the mechanism
operates
as described
below to turn ON the turntable's power and prepare to
move the tonearm to the predetermined position on the
record. Operation (See Fig. 1).
When the start rod is pushed in direction ''a'', the slider
moves
in direction ''b''. During this time, cam
(D) of
the slider pushes part
of the off lever, which is in
turn rotated in direction ''d'', thus unlocking boss €)
of the switch lever. Thereby, the microswitch switches
ON to rotate the platter. On the other hand, as cam
(B)
of the slider pushes part
of the reject lever in direc-
tion ''c'', the trip lever is driven in direction ''e''. The trip
lever drives
the
engagement
in direction
''f''. As
a
result, the platter spindle gear engages
with the main
gear and the ''change cycle"' starts.
Fig. 2 shows the state at the end of the above opera-
tion.
Main Gear
Switch Lever
Reject Lever
Slider
Lower Trip
a
Pn
Microswitch
'
Start Rod
Platter Spindle Gear
Fig. 1
Main Gear
Switch Lever
Drive Plate
Reject Lever
Slider
Lower Trip
Platter Spindle Gear
Microswitch
QL-F300
No. 2650
2s

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