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Old 5th February 2013, 07:25 AM   #1
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Default Cracking (poping) CD Player

I have CD player Advance acoustic MCD 203. I have a problem with sound.
When listening to music is heard cracking sound from the left or right channel. When it's cold (just turned on) pop quite often. As heating reduced pop to 1-2 times per song. This sound is heard when switching from one track to another.
What could be the problem? From the digital output does not hear this pop. Can be problem in the DAC chip AD1853 or somewhere before?
I replace all electrolytic caps without results.

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Please give me advice on what to do.
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Old 5th February 2013, 05:01 PM   #2
Mooly is offline Mooly  United Kingdom
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Well you have to start somewhere. Have you a 'scope ?

If not you could carefully monitor the audio using h/phones (with series resistor and cap for safety). You would have to look at the chip set and determine where to pick the audio up. That might give a clue, especially if the audio were clean at that point.
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Old 6th February 2013, 07:13 AM   #3
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Yesterday I got a response from the manufacturer that the problem is in decoder board - the second picture. It's all SMD assembly and possibly a some chip is not good. Now I'm waiting for an answer about price and delivery of a new board.
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Old 6th February 2013, 07:35 AM   #4
Mooly is offline Mooly  United Kingdom
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At least they seem to acknowledge it as a known problem... in which case I would push for it to be repaired FOC
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Old 6th February 2013, 11:32 AM   #5
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My player is 6 years old. I doubt they want to repair it FOC.
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