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Technics SL-220 Service Manual page 3

Frequency generator servo automatic turntable system
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m@ PARTS IDENTIFICATION
Phono e: ables
AC power plug
Turntable base
45-rpm adaptor
Turntable mat
Turntable platter
Center spindle
Arm clamp
Strobe dots
Speed selector
Pitch control knobs
@ FEATURES
New Type Frequency Generator Servo Control
One of the major secrets behind the razor-sharp accuracy
and superb quality of sound
lies in the new type (Fre-
quency
Generator)
servo
controlled
DC
motor,
and
greatly improved highly rellable IC circuitry. Even the
slightest hint of speed change and drift is corrected im-
mediately.
Electronic Speed Switching
Even though this turntable is belt-driven, gone is the old
conventional
pulley
type
speed
changing
mechanism.
Speed switching in this unit is fully electronic, thereby
adding to the high degree of mechanical precision and
reliability.
All Front-Panel Controls
The advancement to complete front-panel contro! marks
a big step forward in turntable operation, not only be-
cause of the greater convenience, but also because of the
greater protection from dust, as the dust cover can stay
closed.
Tonearm Cueing Controlled from Front Panel
The tonearm is raised and lowered softly by a viscous-
damped cueing lifter. Even with the dust cover closed, a
cueing can be easily performed as the control is located
on the front panel.
Output terminals
Ground wire (GND)
Hinge
Balance weight
Stylus-pressure ring
Anti-skating contro! knob
Arm rest
Locking nut
Headshell
Strobe illuminato:/pilot lamp
ae
Cuting control
Stop knob
Fig. 1
High Sensitive Gimbal Suspension
The recently developed high sensitivity tonearm bearings
featured
in this unit achieve a very high cegree of per-
formance.
in
addition,
the
universal-typt
detachable
headshell features all gold-plated pin connections to en-
sure unwavering reliability through many years of use.
Independent Pitch Controls
Permits record speed (at both 33-1/3 and 4 rpm) to be
varied by up to 6%.
Precision Strobe IIluminator/Pilot Lanp
With the built-in strobe illuminator/pilot lartp, accurate
speed adjustments can be made rapidly and tasily.
Anti-Skating Force Mechanism
The well-designed anti-skating force mecha ism ensures
minimum
side
thrust
with
different
catridges
and
guarantees accurate center-of-the-groove traé<ing.
Automatic Tonearm Return
For
greater
operational
convenience,
ti€
tonearm
returns to the arm rest automatically, folloy ed by auto-
matic shut-off of the motor.
Detachable Dust Cover

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