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Kareoke machine. cd fine . tape no sound

Kareoke machine. cd fine no prob.On tape, spindles turn, tape passes thro' ok ,head drops onto tape ok, speaker is live(white noise) but no sound. Where should I look to?

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With audio problems if you look inside the unit, start the machine playing, then trace the wires from the tape head to the PC Board, then all you need do is touch the wires from the head with a small screwdriver. This should cause a buzz in either channel, if working right. Follow the circuit of the audio and keep probing. If you get Buzzing sounds near the output, and where the wires from the head enters, then there's something up with the head. But check for micro switches these can break and bend out of place so the sound is cut off.
If you get no buzz at where the head wires enter the PC Board, then there's a fault in the audio section.
As both channels are out you are looking at something common to both channels, for instance an IC.

Posted on Feb 06, 2010

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Hi there
This is an answer which is general to all tape cassette decks. I think it probably applies to yours but this may or may not be the case.
The tape is transported past the "read" head by a pinch wheel and spindle that come up into the cassette on either side of the tape. The spindle runs at a very constant speed and with the tape between this and the (rubber) pinch wheel sounds are transferred fro the read head to the electronics for amplification etc. We are not concerned with that here but with what physically happens to the tape after the pinch wheel. Under normal circumstances a belt is driven from the electric motor to the take-up reel of the cassette. This usually runs slightly faster than the spindle/ pinch wheel so that the tape winds cleanly onto the take-up reel. If this belt is loose, has come off entirely or is otherwise not working properly, then the spindle/pinch wheel will continue to feed the tape but it has nowhere to go because it is not being wound onto the take-up reel, except out of the cassette into the tape desk mechanism. In this case it often gets wrapped around the spindle/pinch wheel assembly and gets into a very nasty tangle, causing serious damage to the tape and possible damage to the deck.
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