Origin Live Resolution MKI - Manual (Page 10)

Page10
steel.
T R O U B L E S H O O T I N G
S P E E D V A R I A T I O N
If there is significant speed variation then causes can be down to the following
• Significant changes in room temperature - this especially affects decks that use thick, viscous oil in the bearings e.g. Rega
decks
• Lack of oil in the bearing so check by adding oil.
• Changed belt tension or an oily belt or sub-platter - clean running surfaces.
• Turntable out of level – this affects the main bearing friction.
• After adjusting the tension of the 3 small Philips screws which hold the motor on, you may need to re-adjust the speed
as they affect motor bearing friction very slightly.
• Check the sub-platter is not fouling on anything - on certain decks it can rub against one of the spring covers - it has
also been known to "bottom" against the top of the bearing house - there should be about 1 to 3mm clearance between
the top of the bearing house and the bottom of the sub-platter.
• A dirty bearing that exhibits too much friction - The sub-platter should drift round effortlessly with the slightest of
nudges and go on spinning. If you suspect the bearing friction to be a little high return the bearing to us for checking.
• A worn thrust bearing - this may occur on a small run of bearings, which were too soft.
• Transistors that have developed temperature instability.
E X C E S S I V E M O T O R N O I S E
The motor needs a run in time of around 2 - 4 days continuous running. They are sometimes a little noisy to start with. It is best to run in
the motor on full power with the belt off. Most importantly you can “tune in” the motor to give minimum noise by adjusting the tightness
of the 3 small Phillips screws next to the motor pulley. The best way to set their tension is to tighten the screws until they just nip tight.
Then back off all 3 screws a little way. Now tighten one screw at a time till you hear which ones cause the least noise when tensioned and
then adjust the other two to give minimum noise. 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 as silent as a/c
motors are - this is because they are cogless and rely on a different type of brush. Having said this dc motors still sound a lot better in terms
of musical performance.
The other major potential source of noise is the motor vibrating due to lack of tightness and causing it’s top plate 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.
Please note that by adjusting these screws you affect 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 3 screws holding the motor to the 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.