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Audiolab 8000a strange fault
Audiolab 8000a strange fault
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Old 10th August 2007, 12:57 PM   #1
wilfulmissing is offline wilfulmissing  United Kingdom
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Default Audiolab 8000a strange fault

My Audiolab 8000a has just developed a strange and apparently inconsistent fault. It's working absolutely fine for my tuner, MD player and DVD player, but when listening to my CD player the sound is thin, distant and whiney. The obvious conclusion is that there is a fault with the CD player, BUT, the problem can be manipulated by applying pressure in different directions to the main volume knob of the amplifier. If you push it in certain directions the sounds returns to normal. As soon as you remove the pressure the fault re-appears. Weird!

Has anyone experienced this before? Any advice on what might be causing this strange problem would be appreciated.


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Old 10th August 2007, 01:38 PM   #2
analog_sa is offline analog_sa  Europe
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Have you tried swapping inputs? A bad jack seems the likeliest culprit.
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Old 10th August 2007, 02:02 PM   #3
AndrewT is offline AndrewT  Scotland
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I seem to recall that the volume control AND the input RCAs are both soldered into the giant circuit board.
Moving one will possibly be affecting the other.
Could be a cracked solder joint.
regards Andrew T.
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Old 11th August 2007, 04:05 AM   #4
Jan Dupont is offline Jan Dupont  Denmark
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As the volume pot is the same for all inputs, the fault is most likely as AndrewT describes.
Give the RCA's and circuit board(s) a good check for cracked solder joints.
If you don't find the fault, try tapping each component very carefully with something insulated, while listen to the CD input to locate the component/area causing the problem.
Good luck
Free Schematic and Service Manual downloads www.audio-circuit.dk, Spare time company (just for fun): www.dupont-audio.com
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