Sony XDR-F1HD / Konrad Mod Issue No. 2

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John Faulkner, Skegness
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Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by John Faulkner, Skegness » 29 Mar 2017 17:22

I have recently been using my XDR-F1HD with my laptop, using the i2c mod and GTK software.

If I don't power up the laptop I can still run the XDR barefoot, taking the audio out of the phono sockets and into an amp. Well, this has been the case until recently. Now, when I power up the XDR, it tries to switch on but fails. I can hear the cooling fan whirring up and down while it tries to spring to life, but it doesn't anymore.

In order to get the XDR to switch on now, I have to connect the USB cable from the Seeeduino box, then the XDR bursts into life. If I power down the laptop, I still get audio from the XDR, via an audio amp, but only for a few minutes or a few seconds. Then the XDR struggles, the audio disappears and I hear the fan whirring up and down again. No audio! Nothing.

The purpose of switching off the laptop is the screen wipes out the FM band. I f I could just use the XDR as a standalone receiver again that would be great! But I can't with the modification in place.

Can somebody recommend a workaround please? Or is my XDR failing?

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by satnipper » 29 Mar 2017 18:58

From the horse's mouth https://fmdx.pl/xdr-i2c/

"If you want to use XDR-F1HD without computer after this modification, connect 5.2 or 10.5V to the Seeeduino DC jack."

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by John Faulkner, Skegness » 29 Mar 2017 21:08

Thank you Stuart. I was looking for this on the Konrad website but couldn't find it.

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by John Faulkner, Skegness » 29 Mar 2017 22:45

Just to double check that I am doing this correctly, would something like this be suitable?

http://www.ebay.co.uk/itm/like/31155167 ... 941&crdt=0

I could plug the USB cable (coming from the Seeeduino board) into one of these?

Thanks.

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by satnipper » 29 Mar 2017 23:03

Maybe - it says it outputs 5V. I'm not sure how significant the missing 0.2V would be. It's within 4% so at that price worth a risk?

Stuart

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by John Faulkner, Skegness » 29 Mar 2017 23:04

Thanks Stuart.

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by manueljbaeza » 30 Mar 2017 14:53

satnipper wrote:
29 Mar 2017 18:58
From the horse's mouth https://fmdx.pl/xdr-i2c/

"If you want to use XDR-F1HD without computer after this modification, connect 5.2 or 10.5V to the Seeeduino DC jack."
But, could it be dangerous to keep 5.2 v connected to the PC when connected radio to the PC or continuously?
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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by satnipper » 30 Mar 2017 16:10

You are only feeding 5.2V to the XDR when the PC is disconnected.

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by manueljbaeza » 30 Mar 2017 16:29

Ok thanks!!! :)
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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by John Faulkner, Skegness » 31 Mar 2017 23:37

The results:

Using the three pin mains / USB plug and plugging the USB cable from the Seeeduino board into this worked, but there was a lot of noise generated by the plug. I had expected this. The plug was a branded model and cost £6 from Asda.

Konrad messaged me to advise to take a line from jW3 in the XDR-F1HD and extend it to the positive pin of the Seeeduino board. This gives 10.5V. The Seeduino board works best when fed with 7 - 12V apparently. I believe Konrad has now included this info on his page at https://fmdx.pl/xdr-i2c/

I just carried out this small mod and it works perfectly.

Just one more problem to solve now. I have an audible (and impossible to ignore) 50 Hz mains hum with the audio. It's the same when I connect the Seeduino USB connection to the computer. In all cases I have phono output from the XDR into an amp, the laptop mic input, computer speakers ... same problem. How can I eliminate this apparent earth loop?

Thanks.

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by satnipper » 01 Apr 2017 09:08

You can try wrapping the audio leads around some decent ferrite.

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Re: Sony XDR-F1HD / Konrad Mod Issue No. 2

Post by John Faulkner, Skegness » 01 Apr 2017 10:19

I never had any luck with that in the paost, but I'll give it a go. Thanks.

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