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Quad Link Amp Bus Connections
Quad Link Amp Bus Connections
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Old 7th November 2018, 09:26 PM   #1
poynton is offline poynton  United Kingdom
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Default Quad Link Amp Bus Connections

I want to use a Quad CD player (and preamp) as a stand-alone unit but it only has the Quad Link/Amp Bus connector on the rear.


There was a power supply advertised on Ebay a year ago but that has now disappeared.

Does anyone have the information regarding which of the connectors is for power and which is for the audio so that I can break-out the plug to the rear of the player?

Thanks
Andy
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Old 7th November 2018, 11:59 PM   #2
MAAC0 is offline MAAC0  Portugal
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I'm not a Quad specialist but from what I've gathered, Quad uses balanced connections for audio and the components switch to the audio bus rather than pre-amp switching. There is a In & out connector on the back side for daisy-chaining like Sony uses in their MHC series.


If there is a power transformer inside, You just follow the traces to the connector. That will be Your mains power input. If there isn't a trafo, the amp sends perhaps +- pre-amp Voltage for the other units.


For audio, You have to measure witch a multimeter which of the other pins are connected to ground, and them the rest will be your audio. Please note there should be ins and outs on each connector, so 8 pins (balanced L&R In&Out). Follow the traces to op-amps.


So, that leaves us with 2 for power, 8+1G or 4G for audio=14. So pretty close.


There are some sites with schematics, but require registration, so perhaps they can help.
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Old 8th November 2018, 08:21 PM   #3
poynton is offline poynton  United Kingdom
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Thanks.

I really wanted the pin-outs for the connector.



Andy
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Old 12th November 2018, 11:31 AM   #4
poynton is offline poynton  United Kingdom
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..Bump ..

Nobody ??


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Old 17th November 2018, 05:07 PM   #5
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....Bump .....

Absolutely nobody?

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Old 17th November 2018, 05:29 PM   #6
steveu is offline steveu  United States
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I see lots of service manual listings on the web but they require registering or "reader updates" (malware), so I leave it to you to take your own risks. There is probably one some where that is not up to no good. Good luck.
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