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In Reply to: RE: No sound from CD player posted by Capt. Z on May 17, 2017 at 10:55:32
What does the display say when you close the drawer? If you just close it, it should read the Table of Contents and then display the total number of tracks and the total time on the disc. If you press "Play" it should display track "1" and also begin counting elapsed time.
If these things are not happening, the most likely problem is a laser failure. If these things are happening but with no sound, then there may be a problem in the electronics - often the power supply.
One can usually hear mechanical activity from inside after the drawer closes. Sometimes it helps to press one ear on the top cover. Good luck!
The display shows normal operation.
Shows all the track, runs just like it should and shows the time 'ticking away' just if it played music.
I don't think it is the power supply itself, that is just a very simple transformer, though I have not checked the zenors on the main board.
I have read online about another Cambridge Audio CD player, but another model. There it turned out a resistor in front of the mute relay had gone bad. I have one relay in my CD player, checked many resistors around that area and all show resistance.
So I am thinking about going into town and trying to find a mute relay.
If you have a friend with an oscilloscope and a copy of the schematic, just trace the analog signal from the output pins on the DAC chip back towards the output jacks. At some point it will stop and that is where your problem lies.
The fact that both channels are affected points towards the power supply, as that is one of the few things in the analog circuitry that is common to both channels. Good luck!
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