Rotel RCD 971 Readout panel doesn't work - diyAudio
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Old 13th July 2011, 07:47 PM   #1
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Default Rotel RCD 971 Readout panel doesn't work

I just finished replacing the little belt that allows the drawer to function normally. This involved taking off the front part of the unit--the black outside part and the gray-framed part underneath, which has the display to the right. The player works fine with the new belt, but the display with the track info etc. is intermittent, but mostly off.

Any thoughts as to what I disconnected? Nothing is obvious to me.
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Old 13th July 2011, 09:14 PM   #2
mlloyd1 is offline mlloyd1  United States
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sounds like just a loose connector for the display. firmly reseat all connectors associated with the display board and hopefully you'll be back in business.

good luck,
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Old 14th July 2011, 02:45 AM   #3
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I wish it were that simple. Everything is connected that I can see. I have a funny feeling that it has to do with grounding the chassis to the display somehow, but I just don't see how.
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Old 15th July 2011, 11:52 AM   #4
Mooly is offline Mooly  United Kingdom
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Has to be something you have done...
Is it a VFD display (Vacuum Tube Flourescent). Make sure there are no dry joints on the display end pins (the heaters).

If it's intermitent try gently moving/prodding/waggling leads and boards to locate.
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Old 16th July 2011, 12:18 AM   #5
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The display is a solid state readout. I forget what you call it. Pretty standard. I've done a little probing. The problem is either the long cable that goes to the triple connector on left side of the display board or the display board itself. I've gotten the display to appear by moving that cable, but lately I can't do that. I assume I have to buy a new cable or board but am not sure which or which cable of the three. Nor is the guy I asked at Rotel. Also these cables seem to be soldered onto their connections. I'm not sure as to the best way to work with them. (I usually work just with tube equipement.)
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Old 16th July 2011, 06:24 AM   #6
Mooly is offline Mooly  United Kingdom
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If you need to desolder anything then solder braid is the most effective... but if you have never used it then practice first on something.

tbh, all that sounds a bit drastic and I'm sure careful fault finding would reveal the exact problem.
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Old 3rd January 2012, 07:52 PM   #7
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Have you found what the problem was? I have a similar problem with my rcd-975. The display panel does not work at all, and push buttons do nothing. So my player is now absolutely useless. And this, too, started after replacing the tray gear.
There is a single connector (8 pins if I remember correctly) going to the display board, and all pins get some voltage (except 1 that is 0v, the ground). I don't really know where to start to isolate the problem.
Any advice would be greatly appreciated.
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Old 4th January 2012, 06:52 AM   #8
Mooly is offline Mooly  United Kingdom
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It would help to see a circuit of this... although it does sound like a "man made" problem tbh like in the original post.

Have you checked (with player OFF) the continuity of all those pins in the connector that was unplugged ? Don't disturb the plug... try and read from the PCB's or components on each side to see if there is continuity.

Can you post of picture of the plug/connector etc. Is it a foil/flexiprint or "Philips" type hard solid core wire ?
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Old 4th January 2012, 08:47 AM   #9
FFL is offline FFL  Serbia
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Here is the schema of RCD971
Attached Files
File Type: pdf RCD971.pdf (175.9 KB, 17 views)
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Old 4th January 2012, 04:27 PM   #10
Mooly is offline Mooly  United Kingdom
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The RCD971 is totally different to the RCD975.


Edit... I see FFL isn't the one who asked the new question, which is about a different player to the original thread...

Should have its own new thread really
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Last edited by Mooly; 4th January 2012 at 04:42 PM.
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