Sony PS-X75 - Tonearm Biotracer Features; Tonearm Operation and Control

PS-X75 |
1-2.” ELECTRONICALLY-CONTROLLED
TONEARM “BIOTRACER”
1-2-1.Resonance Damping at Low Frequencies by
Speed Feedback:
Tonearm vibration, particularly the resonance
generated at low frequencies, is automatically reduced
by feeding the speed fractuation to the linear motor
which monitors the speed of the tonearm.
1-2-2. Front-panel-controlled Stylus Force:
To set the stylus force, turn the knob on the front
panel, and the built-in microcomputer will measure
the force. Changing of the stylus force while listening
to the tones is also possible.
1-2-3. Remote Full-Auto Function:
A luminar sensor controls the tonearm’s lead-in
and return, while monitoring of the down and return-
ing positions is carried out by the linear motor.
Accordingly, the operation is accurate and virtually
silent.
1-2-4. Tonearm Lifter Control from Front Panel:
The up/down operation of the tonearm lifter is
controlled by the vertical linear motor, and the
damper, fitted with a speed feedback circuit, operates
smoothly free from the effects of temperature
change and aging. A muting circuit operates when
the tonearm is in its top position and because this
function is cancelled when the tonearm is down
on the turntable, the bother of having to lower the
amplifier volume every time the stylus has landed
on the record is eliminated.
1-2-5, Fast Repeat Facility:
Repeat operation, controlled electronically by
the horizontal linear motor, begins as soon as the
tonearm returns to near the edge of a record.
1-2-6. Manual Operation with the Dust Cover in Place:
Manual operation is throughly possible without
touching the tonearm, since the upward/downward
and rightward/leftward movement of the tonearm
can be done by buttons provided on the control
panel.
1-3, TURNTABLE AND OTHERS
1-3-1. Automatic Record-size Detection Facility:
The size of records is monitored and measured
by using a photo-electric device and a built-in micro-
computer which then automatically puts the tonearm
into operation.
1-3-2. Crystal-locked Magnedisc Servo System:
The turntable driving system employs the es-
tablished magnedisc system known as a highly-
accurate rotation monitoring and, a phase-locking
using a precision output frequency generated by
a crystal oscillator to obtain a constant turntable
rotation with low drift.
1-3-3. Linear BSL Motor:
A smooth and silent rotation is obtained from
the Linear BSL Motor — almost no cogging which
can become a source of wow and flutter or S/N
degradation. Having a high torqueage, the starting
response is excellent at a half of a turn.
1-3-4, Turntable Incorporates Electromagnetic Brake:
Playing of records is easy due to the tonearm’s
independent operation and the simple start/stop
Operation of the turntable rotation, and a lead-in
to a music is done very easily. Also, with the electro-
magnetic brake, stopping the turntable is smooth
and quick as well as simple to use.