Cambridge Audio 540A, 640A Troubleshooting, There is no power, There is a loud buzz or hum

Models: 640A 540A

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TROUBLESHOOTING

TROUBLESHOOTING

There is no power

Ensure the AC power cord is connected securely.

Ensure the plug is fully inserted into the wall socket and is switched on. Check fuse in the mains plug or adaptor.

There is a loud buzz or hum

Check turntable or tone arm for ground and connection lead fault. Ensure no interconnects are loose or defective.

Ensure that your tape deck/turntable is not too close to the amplifier.

There is no sound

Make sure the unit is not in Standby mode.

Check that source component is properly connected.

Check that 'TAPE MON' is not switched on (unless tape input is required). Check that your speakers are properly connected.

If using Speaker B terminals check they are switched on. If channel LED is flashing turn mute off.

There is no sound on one channel

Ensure that balance control is in the correct position.

Check speaker connections.

Check interconnects.

Unable to make or play tape recordings

Check that TAPE MON and TAPE OUT have been connected correctly.

There is weak bass or diffused stereo imaging

Ensure that speakers are not wired out of phase.

Protection LED flashing

See section on CAP5 protection system.

16Azur integrated amplifier

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Cambridge Audio 540A, 640A user manual Troubleshooting, There is no power, There is a loud buzz or hum, There is no sound