Trouble shooting

Failure: the platter does not rotate although the unit has been switched on.

Possible cause:

The record player/power supply is not connected to the mains.

No mains voltage available.

The belt is not correctly looped around platter and pulley, or it may have dropped off.

There is too much slack in the belt.

Motor or motor control circuitry are defective

Failure: there is wow and flutter audible.

Possible cause:

The bearing is defective

The motor control circuitry is defective

Failure: no signal in one or both channels.

Possible cause:

The connection between record player and amplifier is interrupted.

The input selector of the amplifier is in the wrong posi- tion, respectively has no contact

The amplifier has not been switched on.

The amplifier or the speakers may be defective.

There is no contact at the cartridge pins or the connec- tors respectively jacks at amplifier or speakers have no contact.

If a failure could not be remedied in spite of having thor- oughly examined the possible causes, please contact your Thorens dealer or distribution partner.

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THORENS 550 user manual Trouble shooting, Possible cause