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NAD C 565BEE CD Player

ranukic

ranukic

Active Member
hey,

I picked one up today. The display functions and the remote functions work but the buttons on the face do not. Actually the dial on the face when turned changed the track number but pushing it in does not perform the play or stop functions. The powe LED also functions.

I can play CD’s using the remote.

Any ideas for where I should start to troubleshoot this thing?

Thanks,
James
 
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All of the keys connect between connector 142 on the display board (pins 6 & 7) via a cable to the main board and then directly to the central data control IC. The main control IC is unlikely to be affected as it also takes commands from the IR input (remote control). Each of these circuits (pins 6 & 7) go through a string of resistors with each switch on the display board grounding the loop at that point. Check the separate ground connection from the display board.
 
Thanks for the responses. I spoke with a knowledgeable tech at NAD and he said that more than likely one of the switches on the main board is shorted out. He said he would send me the service manual and part number so that I can replace the switches. I think he is correct because I can dim the display and then the repeat button will respond and if I hold in a couple other buttons and press the forward and back buttons I can get some other buttons to respond. I will circle back once I have these replaced.

On a side note, I am able to play the unit with the remote and it really sounds nice for a CD player. I am in the air on if I will keep this unit or move it once I have everything working. I have a nice Magnavox CDB472 CD player that sounds really nice too....I now see why so many of us have duplicate, triplicate and more of the same components...lol, rabbit hole!

Thanks,

James
 
The tactile switches are trouble. When they short, they lock the controller from certain other keypad functions due to the multiplexed nature of the keyboard matrix.

The NAD tech is likely spot on. The switches are cheap on eBay.
 
Changed out the tact switches and the buttons work great. What a pain though to desolder though. I pooled in new solder and then desoldered it.

Thanks again for recommending that I contact NAD.

James
 
Great! And now I know if mine starts having issues that this might be something to keep an eye out for.
 
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