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Beomaster 1900 broken tape input

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munthe
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munthe posted on Tue, Feb 26 2013 11:42 AM

Hi,

I just bought a beautiful BeoMaster 1900, all the sliders, buttons and light bulbs works like a charm, the FM radio gives good sound. I have opened both the top and button cover and circuits looks like they are in good condition.

But the tape in gives no sound. When set on either the phono or tape input the beomaster produces a monotone humming sound. When touching the jack end of the DIN - mini-jack cable I have plugged in to the tape input no static sounds are heard. 

Any suggestions to what might be wrong?

Thanks in advance.

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Dillen
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Dillen replied on Tue, Feb 26 2013 11:56 AM

Welcome to Beoworld !

Could be that the DIN/Jack adapter has been wired to use the output pins rather than the input pins of the DIN.

Martin

munthe
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munthe replied on Tue, Feb 26 2013 8:02 PM

Just bought the cable today, the package said "5 pin DIN plug to 3.5mm stereo plug, 1.5m". That should be correct, right?

Dillen
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Dillen replied on Tue, Feb 26 2013 8:05 PM

Depends on the direction of the signal it carries.
Of the 5 pins in the DIN, two pins carry record signals (output from Beomaster), two other
pins carry playback signals (input to Beomaster).
Last pin is a ground.

If your adapter is using the record pins (meant to carry signals from the Beomaster to
the external device), it won't work.

Martin

munthe
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munthe replied on Tue, Feb 26 2013 8:34 PM

Thanks for the quick answers. Understand that the wiring can be wrong, do you know which pins carry the playback signal?

I bought this cable: https://www.elextra.dk/main.aspx?page=article&artno=H28223 (page in Danish), the pins are 1+4+2 wired, is that correct? Or should I look for a new cable?

Dillen
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Dillen replied on Tue, Feb 26 2013 8:45 PM

Pins 1 and 4 are indeed the ones carrying the record signal. Sad
That adapter is wrongly advertized.

Another thing is that the page states that the adapter is not shielded which, with a length
of 1,5 meters means that it may easily pick up lots of radio freq. signals (antenna function), causing
hissing and/or humming noises.

Martin

munthe
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munthe replied on Tue, Feb 26 2013 9:23 PM

Ok, thanks for the help, I will try order a proper cable and see if it works.

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