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9

Excessive Motor Noise

The motor needs a run in time of around  
2 - 4 days continuous running. They are 
sometimes a little noisy to start with. Most 
importantly you can “tune in” the motor to give 
minimum  noise by slackening off all 3 mounting 
plate screws next to the pulley then tightening 
one screw in turn. Find out which screw reduces 
motor noise when lightly tightened and then 
adjust the other two to give minimum noise. 

Please note that by adjusting these screws 
you effect the angle of the motor. If the belt 
touches the flanges at the top or bottom of the 
pulley then the motor is at too extreme an 
angle and you will need to re-adjust the 
bolts. The ideal is for a vertical pulley with 
the lowest noise level. If you get a knocking 
sound from the motor then slightly slacken 
off the three screws holding the motor to the  
top plate. 
 
It may be necessary to use thread lock or similar 
to stop the screws vibrating loose. If it continues 
to be very noisy please get back to us and we 
may check it out. However bear in mind that the 
DC motor is never silent as a/c motors are - this 

is because they rely on a higher grade of brush.

The other major potential source of noise 
is the motor vibrating against it’s top plate 
and causing it to resonate. The solution is 
usually to slightly tighten the 3 small screws 
holding on the motor. This adjustment is fairly 
critical - if the 3 small screws are too tight 
then the motor whispers, too slack and the 
motor can vibrate against it’s top plate.

If you have checked the above and are still 
having trouble please contact us making a 
note of the serial number on the back of 
the control box.

Example Fitting the Kit to an LP12

To fit the DC motor kit to the Linn is 
straightforward by carrying out the following 
steps. No drilling of the top-plate is required and 
the modifications are easily reversible should you 
ever wish to sell your Linn but retain the DC motor.

Unplug the deck from the mains supply for safety 
reasons and before doing any work allow the 
Valhulla capacitors to discharge for 45 minutes. 
Do not remove the baseboard cover before this 
period is over as there is danger of lethal electric 
shock. You MUST also remove the mains plug 
at this stage to avoid any possibility of someone 
plugging it in at a later stage. You will not need the 
Linn electronic power supply any more, so it can 
either be detached entirely or simply left in place 
for quick reversal of this modification. The LP12 

will sound better if the Valhulla board is removed 
entirely due to the additional resonance it inputs to 
the plinth. 

Unscrew the baseboard from the Linn - the 
screws, which hold on the 4 rubber feet and 2 
others, usually hold it on. 

Disconnect the 4 wires leading to the Linn motor 
(2 grey, 1 blue, 1 red) by slackening the screws 
holding them at the terminal block. 

Unscrew the 2 slotted pan head screws that 
control the tilt of the Linn motor. 

Unscrew the 2 black round headed Allen screws 
that hold on the Linn Motor - you may need to 

Summary of Contents for DC Motor Kit

Page 1: ...tion Manual DC Motor Kit For Turntables Do not plug this kit into a mains conditioner or surge protection etc or the performance may be severely degraded O R I G I N L I V E O R I G I N LIVE ORI G I N...

Page 2: ...3 Packing List PG 4 Installing The Kit PG 4 Motor Installation PG 5 Connecting Power Supply PG 5 Upgrade Transformer PG 6 Setting Motor Speed PG 6 7 Notes PG 8 Trouble Shooting PG 9 Example Kit Fittin...

Page 3: ...the instructions refer to the various diagrams for part names and clarity The motor kit can take as little as 30 minutes to install depending on your deck and expertise The DC regulator electronics wi...

Page 4: ...and the tension is not that critical Please see Fitting Power Supply lp12 for further information Correct Belt Tension Disconnect Old Supply Unplug the deck from the mains supply for safety reasons a...

Page 5: ...by transformers amplifiers power supplies etc Power LED Rotary Speed Control Switch You can tension the belt by pivoting the motor plate about the bolt and relying on the bolt friction to hold the mot...

Page 6: ...d about 2 feet from the strobe disc will also work fine The bulb flickers at 50 Hz in the EEC and 60 Hz in the USA You can purchase bayonet fitting florescent bulbs to fit normal lamps Try to shut out...

Page 7: ...er words it is 2 180 x 100 1 fast when started from cold Speed variation with the DC motor varies minutely depending on the track played and cut of record Click the rotary switch to the 2nd click cloc...

Page 8: ...0 seconds of putting the needle on the record the speed will not be perfect as it takes a while to settle down Some people make the mistake of constantly watching the speed before the deck has settled...

Page 9: ...s are too tight then the motor whispers too slack and the motor can vibrate against it s top plate If you have checked the above and are still having trouble please contact us making a note of the ser...

Page 10: ...pacers they are not designed fit directly under the bolt heads The bolt only need to be nipped tight for best sound quality and the distance from centre of platter to motor pulley centre should be adj...

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