Yamaha TT-S303 Manual De Instrucciones página 23

Troubleshooting
If the unit stops operating correctly, check the following points.
If taking the appropriate action does not solve the problem, or if there is a problem not listed below, press the z (power) button located on the unit's back panel to turn
off the power, disconnect the power cord, and contact your nearest authorized Yamaha dealer or service center.
Problem
Pressing z (power) does not
turn on the power.
The platter does not rotate.
No sound.
Volume is too weak or too loud.
Something is wrong with the
left/right balance of the sound.
Playback speed is wrong.
Hum is audible.
Cause
The AC adaptor has come unplugged from this unit's DC IN
jack or from the AC outlet, or is not firmly plugged in.
The belt is not correctly positioned on the platter and pulley,
or the belt has come off.
z (power) is not on.
The head shell is not correctly attached to the tone arm.
The RCA stereo cable is not connected correctly.
The mute setting of the amplifier is on.
The cartridge setting of the amplifier or phono equalizer is
incorrect.
The PHONO EQ switch is set incorrectly.
The turntable is tilted.
The speed setting is incorrect.
The RCA stereo cable is not connected correctly.
The head shell is not firmly secured to the tone arm.
Action
Firmly plug the AC adaptor into this unit's DC IN jack and into
an AC outlet.
Attach the belt correctly to the platter and the pulley.
Turn z (power) on.
Attach the head shell correctly to the tone arm.
Connect the RCA stereo cable correctly.
Turn off the mute setting of the amplifier.
Set the cartridge setting of the amplifier or phono equalizer
correctly for the type of cartridge that you're using (MM or
MC).
Set the PHONO EQ switch correctly for the device that is
connected.
Place the turntable on a level location.
Set the 33/45 (speed) setting correctly. This unit does not
support playback of SP records (78 rpm).
Connect the RCA stereo cable correctly.
Use the lock nut to firmly secure the head shell to the tone
arm.
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When necessary Troubleshooting
Reference
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