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Dear experts,
As a way to control my VX7000 with a Beo4 I hooked up an IR sensor.
Because the VX7000 does not have an IR sensor input jack, I connected the sensor to pin 8 of the SCART connector, and to an external 5V power supply.
The LED on the sensor lights up when I press a button on the Beo4, and I can see the signal on the oscilloscope.
However, the VCR, which is in working order, does not react.
I have seen some dicussion about this in the old forum, but it was not conclusive.
Any suggestions about how to push the datalink signal from the IR receiver into the VX7000 would be very welcome.
Have a look at Leslie's VX7000 post here: http://archivedforum2.beoworld.org/forums/p/189/77455.aspx#77455
Sadly he no longer posts on here, but I think he has a Facebook page, so you may be able to get in touch with him.
Thanks a lot,
However, Leslie's post shows a VCR equipped with the IR sensor port that my machine unfortunately lacks.
Have you got access to the circuit diagram for a VX5000 which has the IR socket? You may be able to work it out from there if the datalink connection is similar.
From the VX5000 service manual online, I can see that the IR jack sensor input goes to the same PCB31 & IC1500 as the TV SCART's pin 8, but to a different location.
On second thoughts, I think you'd be better off contacting the author of this excellent thread: http://archivedforum2.beoworld.org/forums/t/8647.aspx
Indeed I have looked at the VX5000 schematic. It is an interesting puzzle to find out what IC1500 does.
IC1500 is called "DC Filter". I understood that the SCART pin 8 has a dual function, it also carries a 12 volt "sense" signal. It seems that IC1500 controls this. I do not have access to the VX7000 schematic, to see where the signal from pin 8 goes.
So far I did not find an explanation how this dual function of the pin 8 connection (12 v sense / datalink ) works.
This was a typically sophisticated B&O example of clever design.
The Scart pin 8 is used for various communications,and does in fact transmit data in both directions.B&O exploited this so that the vcr could be controlled via the tv remote,or data could be sent from the vcr to the tv,eg for timer etc display info.
They worked out that you could "modulate" the control line in either state,either "play"@12v,or otherwise @5v.It all worked very well.
The VX5000 is the more complex machine,but the VX7000 worked well too,and didn't seem to suffer from the overheating problems of the earlier machine.
You can indeed modify the VX7000 for independent operation via Beo4 etc.
You will need an MCL2 transceiver,and need to do some limited reworking of the machine's wiring.
I made up a kit to do this,and will see if I can find the details.
Regards,
Nick
Dear Nick,
That would be great. If have the B&O VX sensor. http://beocentral.com/vxsensor
Hans
I seem to have mislaid the finer details of this modification,but I have a note in the service manual.
You'll need to gain access to module 32,which is the inner panel behind the sockets at the rear right hand side of the machine.
Cut the pcb link between pins 3 and 4 of IC4502.
Remove the plug from your VX sensor,and pass the cable through the rear casing of the machine.
Connect the green wire to pin 6 of IC4502(5 volt),the white wire to pin 3(data),and the brown wire(ground) to pin 11.
power up the machine and you should now have remote control!
The 12v play signal will still appear ,to automatically switch your (non B&O?)tv over to av mode,and you have the B&O menus on screen to operate/program the machine.
Having done this mod,the machine will no longer respond to commands via a B&O tv,only via the B&O remote Beo4,BL1000 etc.
Thanks a lot. I am exited to do the modification.
Few years later...
... I had the same challenge and tried this guidance to control my VX7000 directly.
Thanks to the great and patient support by Nick we found an additional step that was needed to get it going - which is to establish a connection between pins 2 and 3 of IC4502. (3 to 4 connection still opened) This is what apparently the VX sensor plug does when inserted into the jack of VX5000 and the same logic apparently works also on VX7000.
( I could not activate the on-screen menu yet.. )
Thanks again to Nick !