Datalink for older Vs newer Beograms

[CharlieWednesday]

I was not sure if the Beomaster 4500 I got recently had the optional RIAA installed, so I connected my Beograms 9500 to it to test. I got a very quiet sound so it answered my question (no preamp), but I also noticed that there was no datalink – when I pressed Phono on the Beomaster the turntable did not start, and when I pressed play on the Beogram the Beomaster did not go to Phono. I did set the Beomaster to use that input as Phono. By the way.

I could have sworn I’d seen a previous post where it said that the Datalink signals are different in later Beograms, but can’t find it now.

Is this explainable?

• This topic was modified 11 hours, 52 minutes ago by CharlieWednesday.

Location: Liverpool
My B&O Icons:

[Madskp]

The datalink signals are the same for Beograms with or without Riia.

However the pin used in the DIN connector differs.

Without Riaa datalink is on Pin 6

With Riaa datalink is on Pin 7

I think it was made this way to avoid starting a Beogram with Riaa when connected to a Beomaster/Beocenter with built in Riaa

Also For the Beograms with built in Riaa you can connect it to a CD socket (that use pin 7 for datalink) and control it with CD commands.

If neede you can reverse the pins and still control the Beogram

Location: Denmark

[CharlieWednesday]

Ah, thank you, that’s really helpful.  I knew I’d read something like this before but couldn’t find it.

Reason I ask, I’ve got hold of a Beomaster 4500 and Beogram CD 4500, both of which need repairs but they are in fantastic cosmetic condition.  I was thinking that, with some clever wiring, I could connect my Beogram 9500, routing the audio signals through my dedicated pre-amp, but also somehow connecting the datalink pin to get that full Beolink action.  Knowing what you’ve told me, this will be possible!

• This reply was modified 47 minutes ago by CharlieWednesday.

Location: Liverpool
My B&O Icons:

[Madskp]

Yes that should be possible. I have got hold of a RiAA with 7 Pin Din connectors where the datapins are reversed throug the unit. That makes it very easy to get the conttol part along with RIAA

Location: Denmark

[Guy]

Madskp wrote:

I have got hold of a RiAA with 7 Pin Din connectors where the datapins are reversed throug the unit.

Is it this one?  https://shop.oneremote.dk/shop/69068-riaa-amplifier/4199-riaa-ii/

(I assume that it swaps the datalink connection from pin 6 to 7)

• This reply was modified 12 minutes ago by Guy.

Location: Warwickshire, UK
My B&O Icons:

[Author]

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