Sperling-Audio L-3 User manual

User´s Manual
Turntable L-3

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Table of Contents
Table of ContentsTable of Contents
Table of Contents
Page Contents
1 Table of Contents
2 Safety Information
4 Des ription
5 Delivery Contents
6 Mounting and Setup
6 - 1 Chassis and Bearing
11 - 2 for the Tone Arm Bases
13 - 3 for the Platter
16 - 4 for the Motor Housing
18 - 5 forthe Tone Arms
20 - 6 S aling and Tone Arm Bases
20 - 6.1 Resetting the Position
22 Tonality
24 Conne ting and Start-Up
27 Quality and Care
28 Te hni al Data
29 Allo ation / Cerre tion Table
31 De laration aof Conformity
32 Notes

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Safety Information
Safety InformationSafety Information
Safety Information
Caution
CautionCaution
Caution !
! !
!
To avoid the risk of ele tri al sho k, do not open the
devi e or remove it from its housing. For servi e
pro edures, onta t a qualified te hni ian or the
manufa turers dire tly.
Read the user’s manual arefully and ompletely before
using the devi e.
Follow all of the warnings and operating instru tions
ontained in this manual or written on the devi e itself.
Store the devi e in a safe pla e!

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Power Supply
Power SupplyPower Supply
Power Supply
Be sure to use this equipment only with the provided
ables and only when onne ted to a suitable AC
voltage sour e (see the hapter on te hni al data). The
equipment an only be used with a grounded voltage
sour e. Damaged ables are should never be used and
require immediate repla ement.
Ele tri al Charge
Ele tri al ChargeEle tri al Charge
Ele tri al Charge
Before installation, be sure that the devi e does not
ontain an ele tri al harge. Unplug the power ord or
shut off the power sour e.
Cables
CablesCables
Cables
Use only the ables that were delivered with the devi e.
Damage that o urs from the use of ables that were not
provided by the manufa turer is not overed by the
warranty. Be ertain that the ables lay in su h a way that
they do not ause a tripping hazard.
Me hani s
Me hani sMe hani s
Me hani s

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The devi e should only be used on a stable, level surfa e.
Be ertain that the drive belts an move freely without
interferen e from other obje ts and that they do not rub
or grind.
Brea h of Warranty
Brea h of WarrantyBrea h of Warranty
Brea h of Warranty
The manufa turer annot a ept responsibility devi es
that
- were not used in a ordan e with the given
regulations,
- were repaired or modified by unauthorized
sour es,
- exhibit visible external damage that was not
reported upon delivery,
- were damaged by third party devi es.
The manufa turer annot be liable for damages that may
o ur to other devi es as a result of use of this produ t.
Operational Range
Operational RangeOperational Range
Operational Range
These devi es are intended to be used indoors. Avoid
exposure to extreme old, heat and moisture.
Des ription
Des riptionDes ription
Des ription
The L-3 drive unit is a heavyweight turntable that makes it
possible to play re ords at 33 1/3 and 45 rpm thanks to

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the M-1 Motor Housing and a mounted tone arm. The
hassis an be equipped ele tive with one or two tone
arm bases, onto whi h tone arms of 9” to 12” in length
an be atta hed by way of an adjustment me hanism.
With this adjustment me hanism, on whi h the base plate
and the atta hed tone arms an be progressively
rotated, it’s possible to set ea h tone arm into any desired
position also under allowan e of given anti-skating zero
points of ertain tone arms.
Delivery Con
Delivery ConDelivery Con
Delivery Contents
tentstents
tents
1 x L-3 Drive Unit in l. 1 or 2 base plates of your hoi e
1 x Floor dis Ø 70 mm
1 x M-1 Motor Housing in l. Adapter Base
3 x Floor dis s Ø 40 mm
1 x NRM-1/S Control Unit
2 x Drive tape, 1 x drive belt in lear ase
1 x IEC onne tor
1 x User’s manual
1 x Bull’s eye level big
1 x Bull’s eye level small
1 x Toolkit
1 x Bearing oil
1 x Aluminum – Polish
1 Pair of white gloves

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Installation
Installation Installation
Installation
Basi ally the L-3 will be delivered in a pre-installed
ondition, therefor only a few of the following steps will be
ne essary to omplete the turntable. Even so this manual
will go into advan ed installation steps to make further
work more omfortable for our ustomer.
Please use the supplied pair of gloves during installation
to avoid finger-prints and s rat hes on the surfa es of the
high gloss drilled aluminium-parts.
1. Chassis and Bearing
The turntable- hassis will be shipped pre-mounted, the
ustomer has only to omplete the bearing to fit the
platter and to install the arm-base-plate. The bearing
bushing the bearing ball and the needed oil are
in luded.

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Please start with the positioning of the small round enter-
plate. This defines the final position of the turntable. (pi .
7.1) The hassis-bottom must now over the enter-plate
exa tly entered. The ountersink within the enter-plate
helps to do this propper. (pi . 7.2) Please rotate the
hassis-bottom until one of the three ountersinks is bound
forward (pi . 7.3).
Pi 7.1 Pi 7.2 Pi 7.3
The set-up area should be solid, flat and of adequate size.
Please pla e the enter se tion of the turntable on the
hassis-bottom. The enter spike should fit into the
ountersink of the small round enter-plate whereas the
three adjustable outer spikes should fit exa tly with the
three ountersinks of the hassis-bottom. (pi . 8.1) The
Sperling-Logo must be fa ed forward to ensure the
orre t position of the arm-base (pi . 8.2)
Please use the supplied ir ular level to level the hassis
(pi . 8.3) Turning the adjustable spikes lo kwise will sink

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the hassis, ounter- lo kwise will lift it up. (pi . 8.4) The
found position of these spikes an be fixed by the three
small s rews above the knurled-nuts. The knurled s rews
are fitted with 6 drilled holes in a 60° layout. These slots
are for the metal pin in luded in delivery as a tool for
finest adjustment of the turntables leveling.
Pi 8.1 Pi 8.2
Pi 8.3 Pi 8.4

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When the leveling has been done the bearing an be
installed. Please de-install the bearing- over-ring by
loosen the six s rews. Pla e the bearing ball into the
ountersink of the bearing-shaft. Now use the supplied oil-
bottle and fill oil from above over the bearing-ball until
the oil runs down the shaft into the oil-reservoir. (pi . 9.1)
Stop doing so when nearly 1mm of oil overs the bottom
of the reservoir. Now slide the bearing bushing arefully
on the shaft using alternating motion (pi . 9.2)
Pi 9.1 Pi 9.2
Turn the shaft a few times to make sure that the oil-film fills
the whole bearing-area. (pi . 9.3)

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Pi 9.3 Pi 9.4
Now add oil to the reservoir (pi . 9.4) as long as the oil
level rea hes the ode ring on the inner side of the
reservoir (pi . 10.1 arrow).
Pi 10.1 Pi 10.2
Afterwards please pla e the two supplied o-rings into the
designated grooves of the oil-reservoir (pi . 10.2) and fix

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the bearing- over-ring with the six s rews. (pi . 10.3).
Please fasten the s rews riss- ross to avoid bra ing.
Pi 11.1 Pi 11.2
2. Installation of the Tone Arm Bases
The turntable offers the opportunity to install two tone arm
bases. (pi 11.1). They are not mounted on delivery.
Please use the s rewed-in M6x20 s rews for that. Please
fasten them from inwards to outwards to avoid bra ing. If
the turntable was ordered with only one tone arm base
the unused left seating is overed by a dummy- over (pi
11.2). When a se ond arm base should be installed in
future please remove the dummy- over and use the
s rews to fix the additional arm base.

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Pi 11.1 Pi 11.2
Pi 12.1

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3. Platter
To install the platter one needs the supplied two bla k
handles and the Allen key SW 2,0. Two opposing platter-
inlays have srews with a red dot (pi . 13.1)

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Pi 13.1
Please remove the eight s rews of these two inlays. Under
these inlays you will find two M8-threads (pi . 14.1) where
the two handles an be s rewed-in and lo ked with the
knurled-nuts. (pi . 14.2)
Now you an slide the platter over the bearing bushing.
(pi 15.1).

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Pi 14.1 Pi 14.2
Please remove the handles, fit the inlays and tighten the
s rews. Please use the same position for the red marked
s rews like in the delivered ondition for later installation.
Caution!
Caution!Caution!
Caution! The platter must be pla ed absolutely verti ally
in order to onform with the tight produ tion toleran es!
Please avoid to tilt the platter during this installation. (pi .
15.1). Please make sure that both bearing bushing and
the platter have nearly the same temperature (best 20°C).
Please avoid to mu h differen e in temperature between
platter and bearing bushing. Let the platter slide down
gently till the lower end position without let it fall down. This
ould destroy the bearing ball!

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Pi 15.1

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4. Motor Housing
Pla e the motor housing entered behind the drive unit
on the provided plates with 40 mm diameter (pi 16.1).
Pla e the provided small bull’s eye level on top of the
motor-pulley and level them by adjusting the three feets
(pi 16.2). Turning to the right will raise the motor up and
turning to the left will lower it. Pla e the drive belt around
the turntable and the drive pulley of the motor housing. By
moving the motor housing, you an make then tighten the
drive belts. Be areful not to make it too tight: the
distan e should be su h as that you an fit about one
finger between pulley and platter. (pi 17.1) Be sure that
the white tape’s sti ky side is pointing outward.
Pi 16.1 Pi 16.2

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Pi 17.1

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5. Mounting the Tone Arms
You an mount pra ti ally any tone arm between 9” and
12” available on the market onto the innovative tone arm
bases with the rotation plate me hanism.
Aside from the large ir le (Pi 18.1) and the ir ular
segment (Pi 18.2), you’ll need the a tual rotation plate
that the tone arm is atta hed to in order to do this (pi
18.3). This plate is made individually for every arm or arm
produ er, pi tured here with a plate for tone arms with
SME-Cutout (see also the table on pages 31/32). The
orresponding plates for the arms are delivered with the
drive unit. If you want to use another tone arm in future,
you an order a mat hing plate at any time. Custom-
designs are no problem – just onta t us. For individual
onstru tions, a universal plate without holes is also
available.
Pi 18.1 Pi 18.2 Pi 18.3
The large ir le and ir ular segment are mounted in the
position ex fa tory with a length of 9” to about 10.5” (Pi
19.1). For this, the semi- ir le is mounted outside of the
large ir le inside. To mount longer tone arms of up to