Kuzma Stabi S User manual

S T A B I T U R N T A B L E
instruction manual
KAT d. o. o. Kuzma Audio Trade Hotemaže 17 a
4205 PREDDVOR
SLOVENIA tel. [phone] fax [phone]

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S T A B I T U R N T A B L E 2KUZMA
CONTENTS
I. GENERAL DESCRIPTION 3
SPECIFICATIONS 4
ACCESSORIES 4
II. UNPACKING 6
III. ASSEMBLY 7
1. Oil in Suspension Reservoirs 7
2. Oil in Bearing and Insertion of Subplatter 9
3. Belt 9
4. Platter 10
5. Connecting Power Supply Unit 12
6. Testing 13
7. Mounting of Tonearm 14
IV. ADJUSTMENT 17
1. Positioning Turntable and Power Supply 17
2. Connections 18
3. Levelling Turntable 18
4. Levelling Platter 18
5. Testing 18
6. Fine Speed Adjustment 20
V. USE OF CLAMP 22
VI. GENERAL MAINTAINANCE 23
1. Cleaning of Woodwork 23
2. Cleaning Pulley and Belt 23
3. Tightening Screws on Armboard 23
4. Check Oil in Bearing 24
VII. MINOR PROBLEMS 25
A. Immobile Subchassis 25
B. Platter does not Rotate 25
C. Noisy Belt 25
D. Cleaning of mat 25
E. Slow Start 26
F. Movement of Subchassis while Platter is Rotating 27
G. Sensitivity to Mechanical Feedback and Shock 28
VIII. TRANSPORT AND PACKING 29

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S T A B I T U R N T A B L E 3KUZMA
I. GENERAL DESCRIPTION
Stabi is a suspended subchassis turntable. The lid, sides and main plinth are
constructed of solid oak and the lid is topped with a sheet of smoled glass. The medite
subchassis is suspended from four springs which are damped in four oil reservoirs.
This suspension is simply adjusted by four black knobs on the top plate.
The turntable is additionally fitted with adjustable legs for levelling the plinth ending
in spiked feet which can, if desired, be covered with the protective cups also supplied.
The shaft is highly polished and is supported in the bearing at five points ensuring no
movement, low constant friction and minimum vibration. The shaft is fixed in the
supplatter which is turned by a belt.
The motor is fixed on a metal plate, decoupled from the turntable via rubber inserts.
The platter is of painted aluminium and weighs 3 Kg and has a rubber ring inserted
for extra damping. The turntable also comes equipped with a mat and a record clamp.
Stabi has its own optional power supply which enables the motor to rotate with the
minimum of vibration and constant torque. It is quartz controlled, split phase with
internal + 0.4 % speed adjustment. The siglas is amplified by two 20 W amplifiers.
Each Stabi turntable is individually built and tested and made of the best available
materials to ensure it gives the highest possible standard of musical performance. We
wish you many happy and trouble free listening years.

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S T A B I T U R N T A B L E 4KUZMA
SPECIFICATIONS
Mass 21 Kg
External Dimensions (Lid Closed) 510 mm x 411 mm x 200 mm
(Lid Open) 510 mm x 500 mm x 500 mm
Weight of platter and subplatter 4 Kg
Resonance of subchassis 3.5 Hz
Speeds 33 rpm and 45 rpm
Mat special rubber & textile compound
Motor 24 pole synchronous
110 v, 50 Hz
Mains Supply 110 v, 220 v, 240 v - 50/60 Hz
ACCESSORIES
The following are supplied with the turntable and will be found in the accessories box.
1. Clamp with washer.
2. Alan key 5 mm for tonearm board.
3. Alan key 2.5 mm for fixing legs.
4. One small plastic bottle with oil for bearing.
5. One large plastic bottle with oil for suspension reservoirs Silicon
Oil 5000.
6. Belt.

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S T A B I T U R N T A B L E 5KUZMA
Fig.1

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S T A B I T U R N T A B L E 6KUZMA
II. UNPACKING
(Fig. 1)
1. Remove box on top containing tonearm*, power supply*, subplatter and
accessories.
2. Lift and remove shaped cardboard layer.
3. Remove glass protection cardboard layer.4. At side remove polystyrene inserts and
remove platter in box.
5. Remove internal u shaped cardboard containing turntable.
6. Open lid and remove cardboard cross.
7. On the underside of turntable between subchassis and plinth are four cardboard
corner wedges which should be removed by pulling down. (Fig. 2)
8. Replace packing materials in box for possible future use.
Fig. 2

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S T A B I T U R N T A B L E 7KUZMA
III. ASSEMBLY
Place turntable on convenient worktable.
1. Oil in Suspension Reservoirs
You will need larger oil bottle, tissue, scissors.
a) Unscrew top of oil bottle and snip of 5 mm off nozzle.
b) Position turntable so that one corner extends over edge of table. From underneath
you will see around black plate which is the bottom of reservoir (Fig. 3)
c) Open lid. With one hand unscrew black knob (anticlockwise) on turntable top that
lies immediately above reservoir, supporting reservoir with fingers to revent
turning. Continue unscrewing until knob is released and can be removed. At this
point reservoir will drop into your hand. (Fig. 4)
d) In centre of reservoir is a hole in the inner ring through which the thick silicon oil
should be slowly poured, squeezing the bottle, until surface of the oil shows
approximately 10 - 15 mm below the top edge of reservoir (ie quarter of bottle).
Allow oil to settle and check level by pushing ring sideways with nozzle of bottle
(Fig. 4a)
e) Wipe clean any spillt oil.
f) Wipe dust on top edge of surface of plinth.
g) You will notice that the inner ring is not central. It is recommended that the side
closest to the edge should be directed towards the centre of turntable. Firmly
reinsert reservoir back into the turntable from underneath and support while you
rescrew (clockwise) the black knob until reservoir is fixed.
NOTE: Knob should be tightened until slight counter pressure can be felt.
NOTE: When moving turntable to reposition, always close lid.
h) Repeat procedure for remaining three reservoirs.
NOTE: Oil used is silicon oil 5000 or oil of a similar viscosity.

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S T A B I T U R N T A B L E 8KUZMA

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S T A B I T U R N T A B L E 9KUZMA
2. Oil in Bearing and Insertion of Subplatter
a) Remove tape sealing bearing.
b) Take smaller oil bottle and squeeze 20 drops into the bearing in centre of
turntable. The insertion of the shaft will cause the oil level to rise.
c) Remove protective plastic tube from subplatter shaft. Handle carefully and
ensure no dust adheres to shaft.
NOTE: Should any dirt become attached, wipe with cotton cloth and alcohol.
d) Slowly insert flat ended shaft into bearing.
e) Rotate subplatter to ensure smooth movement.
f) Lift out subplatter and check that level of oil on shaft reaches the top. If level
is lower add oil drops, approximately one drop to increase level for one mm.
Oil should bathe shaft completely. To check this see Fig. 5.
Fig. 5
NOTE: The shaft is not tight in bearing and will rock slightly if pressed.
3. Belt
This can be found with subplatter.
a) Ensure hands are clean and dry and remove belt from plastic bag.
b) Place belt around subplatter and then around top groove of motor pulley.
NOTE: Subplatter is higher than motor pulley as weight of platter has yet to be
added.
NOTE: When putting belt around subplatter it may slip and drop under subplatter.
If so it is important to check that no oil has adhered to belt and if necessary
to clean belt with cotton cloth and alcohol.

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S T A B I T U R N T A B L E 10 KUZMA
4. Platter
a) Before positioning platter, check that top surface of subplatter and underside of
platter are both dust free.
b) Gently lower platter into spindle.
c) Platter will now be in a raised position and it must be lowered to give an
approximate clearance of 2 mm (ie approximate thickness of belt) between bottom
surface of platter and turntable top. If platter is too low, raise by screwing black
knobs clockwise (Fig. 6)
d) This is achieved by unscrewing (anticlockwise) two diagonal black knobs (A) on
turntable top and then the other diagonal pair (B). This operation should be done
in small gradual stages ie, a few turns of one diagonal pair (A) then a few turns of
the other pair (B) untill the level is slowly brought down to a suitable clearance.
Often, however, one part of platter is clearly higher and the knob closest to that
part should be unscrewed separately until platter is parallel with plinth (Fig.7)
Fig. 6
HINT: While unscrewing one diagonal pair your eye position should be at platter
level between that pair ie just to the side of front konob of the other diagonal pair.

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S T A B I T U R N T A B L E 11 KUZMA
Fig. 7

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S T A B I T U R N T A B L E 12 KUZMA
5. Connecting Power Supply Unit
a) The cable at the back of the turntable has a five pin plug which should be inserted
into connector at rear of power supply. (Fig. 8)
b) Connect mains cable into back of power supply. (Fig. 9)
NOTE: You will see a thin black wire at back of turntable. This is a grounding wire and will
be connected to GND on preamplifier (not on GND of MC step up device) at a later stage.

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S T A B I T U R N T A B L E 13 KUZMA
6. Testing
a) With finger push spindle down gently to ensure subchassis has freedom of
movement. Platter should oscillate for a few seconds.
b) Plug into mains supply. Switch on at rear of power supply. Red light should appear
on front panel (Fig. 9)
OR
If turntable is designed for use without power supply then connect cable to mains.
c) Switch on to 33 rpm position. Light should appear on turntable top plate. (Fig. 10)
OR
Press black play switch. Platter should slowly rotate and reach full speed in 5 - 6
seconds.
d) There should be no noise from turntable.
If there is, check that assembly instructions have been followed exactly, paying
particular attention to height of platter and position of belt.
WARNING: If turntable is designed for use with power supply, the 5 pin connector
should on no account be connected directly to the mains.

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S T A B I T U R N T A B L E 14 KUZMA
7. Mounting of Tonearm
a) To cut blank mounting board
i) Use template provided by manufacturer and mark position of cuts. Bear in mind
that there must be adequate space to close lid and for counterweight. Also check
position of tonearm output cable.
ii) Unscrew four screws securing mounting board using Alan key provided (No. 5)
iii) Make cuts on board. Note that board is of medite which is easy to cut.
iv) Fix tonearm base to board as instructed and replace mounting board, tightening
screws with Alan key.
With pre-cut board
If board is pre-cut it may still be convenient to remove board to attach tonearm base
(see ii and iv above) though this is not always necessary.
b) Fix tonearm into arm base.
c) The weight of the tonearm will have altered the height of the platter from the
turntable top.This should be readjusted using the four black knobs to regain the
required height between platter and top plate of 2 - 3 mm. Ensure that the height
is even around the circumference of the platter (Figs. 6 and 7)
NOTE: Anticlockwise lowers platter, clockwise raises.
d) Securing tonearm cable
You will need a large screwdriver.
i) Close lid and detatch power supply.
ii) Position turntable so that right rear corner extends well over table edge (back leg
should extend over edge). (Fig. 11)
iii) There are two fixing points for the cable, one on the subchassis A. and the other
on frame near rear leg B. Secure cable in curve between these two points.
Ensure
that there is adequate cable from tonearm to allow for height adjustment of
tonearm. (Fig. 12)

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S T A B I T U R N T A B L E 15 KUZMA
iv) With large screwdriver release screws at points A and B and catch cable
between
wood and screw washers.
v) Between these two points the cable should be free and touch nothing. The cable
must be long enough to allow subchassis movement but not too long. To check
this replace leg on worktable so you can inspect the position of cable. If
necessary
reposition with fingers.
vi) If position is not satisfactory release cable at point B and lengthen or shorten as
required.
vii) Check subchassis movement by pressing spindle when platter should oscillate
for a few seconds.

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S T A B I T U R N T A B L E 16 KUZMA

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S T A B I T U R N T A B L E 17 KUZMA
IV. ADJUSTMENT
1. Positioning Turntable and Power Supply
a) Suitable surfaces are:
i) If floors are solid, a solid welded table, sand filled or purpose built turntable table.
ii) If floors are not solid - on a welded shelf.
iii) If neither of these options are available, avoid placing on heavy bulky furniture
and place on strong but lightweight surface.
b) Disconnect power supply and remove platter.
c) Decide whether you will remove the protective cups on feet to expose the spikes
(for optimum performance) or retain the cups. Cups are removed by simply pulling
downwards. Ensure that rubber ring is not mislaid.
NOTE: To replace cups, first carefully place rubber ring around groove on spiked feet
then push on cup, one edge at a time. The cup will be loose. (Fig. 13)
d) When carrying turntable, a tilt of up to 15° should not cause any oil spillage. Mo-
mentary larger angles of tilt are also acceptable due to the viscosity of the oil.
(Fig. 14)
e) Position of power supply is not particularly critical though we do not recommend
it be placed on the right side of the turntable and that there is a minimum clearance
above unit of approximately 50 mm, due to the heat generated.

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S T A B I T U R N T A B L E 18 KUZMA
2. Connections
(See Fig. 8)
a) Reconnect power supply.
b) Connect thin black grounding wire from turntable to GND on preamplifier.
c) Plug tonearm connectors to preamplifier Phono Input. (white - left, red - right)
and tonearm grounding cable to GND on preamplifier.
3. Levelling Turntable
a) Ensure turntable is horizontal using spirit level.
b) Place level at front of turntable top (position A) and adjust front legs until level is
horizontal. (Clockwise raises turntable, anticlockwise lowers) (Fig. 15)
c) Repeat, now placing level on left of platter. (Position B)
d) Check that front of turntable is still horizontal and adjust if necessary.
e) Check that side of turntable is still horizontal, adjust as necessary until both
measurements are stable.
NOTE: If using round spirit level, place at any point on turntable top plate.
f) With Alan key 2,5 mm secure legs until firm but not overtightened. See Fig. 13
4. Levelling Platter
(See Figs 6 and 7)
Platter can be levelled by eye, although a very light spirit level can be used if
available. Adjust level of platter using technique previously described (4d Assembly)
until gap between platter and top plate is approximately 2 mm and horizontal.
5. Testing
Start turntable and ensure running is smooth and noise free.
NOTE: We advise “running in” turntable for approximately 24 hours.

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S T A B I T U R N T A B L E 19 KUZMA
Fig. 15

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S T A B I T U R N T A B L E 20 KUZMA
6. Fine Speed Adjustment
The fine adjustment mechanism is controlled by a switch inside the power supply.The
speed is adjusted in small stages according to the position of the switches.
(Adjustment is possible +0,4 % in 0,05 % steps)
You will need a plastic or wooden toothpick or stick ie. not metal.
a) Turn power supply upside down. (Fig. 16)
b) Remove front right rubber leg (ie. on opposite side to speed selector). This gives
access to switch (Fig. 16 a).