Troubleshooting - NAD C 558 Owner's Manual

PROBLEM
The platter doesn't turn although the unit is switched on.
One or both channels have no output signal.
There is strong hum on phono input.
Sound is distorted or inconsistent from one or both channels.

TROUBLESHOOTING

POSSIBLE CAUSE
• The unit is not connected to the mains power supply.
• No mains power is being delivered at the socket.
• The drive belt is not fitted properly or has slipped off.
• No signal contact from the cartridge to any of the following - internal
tonearm wiring, arm lead, phono box; or to the amplifier.
• Faulty plug, broken wire or loose solder joint in the plug/socket
connection.
• Phono input not selected at amplifier.
• Amplifier or speakers are defective or muted.
• No connection to the loudspeakers.
• Amplifier not switched on.
• No ground connection from cartridge, arm or arm cable to amplifier or
ground loop.
• Turntable is connected to wrong input of amplifier or MM/MC switch is
incorrectly set.
• Needle or cantilever is damaged.
• Wrong rpm setting.
• Drive belt is overstretched or dirty.
• Platter bearing needs lubrication, dirty or damaged.
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