Features - Panasonic SL-1200MK2 Service Manual

• FEATURES
Total quartz locked continuous pitch adjustment
±8%
Quartz-phase-Iocked control means almost perfect accuracy
of turntable rotation.
But with most quartz turntables, this accurate control
circuit must be cut out when the pitch control is employed.
With the SL-1200MK2, however, pitch is variabie con-
tinuously (analogically) by up to ±8% under tata I quartz-
locked control. The pitch is contra lied with a large sliding
lever, located to the right of the turntable platter.
Four lines of platter markings are also provided indicating
+6%, +3.3%, 0% (exact rated speed) and -3.3% change
from rated speed.
Aluminum diecast cabinet and special heavy rubber
base material provide acoustic isolation
The effects of external vibrations are dramatically reduced
in the turntable by th is new turntable construction.
The turntable base is precision-made aluminum diecast.
And the underside of the main base is made of a heavy
rubber material (special one-piece molding) which has
excellent vibration resistanee and absorbing characteristics.
The turntable platter is also vibration-damped with special-
IV fabricat rubber matting in the underside along with the
thick turntable sheet (rubber mat). Four large-size insulating
feet also help to absorb unwanted vibrations.
These features make SL-1200MK2 ideal for use with extra-
high sound pressure levels.
High torque for fast starts
The integral rotor/platter motor delivers 1.5kg·cm (1.3Ib·in)
starting torque. This high torque gives verv QUick starts
enabling the platter to reach 33-113 rpm within 0.7 s. (a
Quarter of a turn). This is a big advantage in many profes-
sional applications where fast cueing is a necessity.
Stylus illuminator for low-light conditions
You'lI appreciate the stylus illuminator when you are using
the turntable under low-light conditions. The illuminator
can be hidden in the turntable base, should you need it,
simplv push a, button and it will pop up gentlv and cast a
beam of light ac~oss the disc in the area traversed bV the
tonearm. '
Cross section of Sl-1200MK2
SL-1200MK2 SL .. 1200MK2
You can then clearlv see the spaces between the selections
on the record, and cue the arm exactlv where vou want it.
The illuminator can then be pushed back down into the
base.
High sensitivity, low mass, gim bal suspension
tonearm
The highlV sensitive tonearm features a genuine gimbal
suspension, the rotational center of which is preciselv
defined at one point. Bearings are finished to a tolerance of
±0.5 microns. This and the extra-closeness of pivot center
to the bearings, res,!lt in the minimal friction of 7 mg
(O_OO7 g) for bottr'horizontal and vertical movement. Add
to this the low 12-gram effective tonearm mass (including
headshell, without cartridge) and vou have a tonearm com-
patible with the wide range of compliances found in todaV's
cartridges. If you choose a popular high compliance MM
cartridge, the low range resonance frequency will appear in
the correct area to avoid warp freQuencies of records, but
without entering the lowend of the audio spectrum. This
tonearm is provided with a comp_uter designed, light-weight,
high-rigidity headshell made of single-piece diecast aluminum
to resist partial vibration. The universal design allows head-
shell interchangeabilitv. Contacts are gold-plated.
Helicoid tonearm height adjustment
Arm height is adjustable within a range of 6 mm to accom-
modate varving cartridge dimensions. Adjustments are don<\
with a precision-made helicoid.
Other fine featu res
• Quick stops are achieved with a fullV electronic braking
svstem.
• A strobe illuminator is provided. The stroboscape is con-
trolled bV the extreme1v stabie Quartz oscillator, rather
than potentiallv unstable AC line frequency.
• Power on/off control built-into strobe illuminator for
ease-of-operation_
• Soft-touch start·stop switch allowing precision control
capability without the annovance of accidental operation.
• Technics integral rotor/platter motor construction with
full cvcl. detection FG.
Fig_ 24
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-NOTE
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Pril1ted in Japan
79093000G S.H.