Yes, I thought too about the possibility of pulling the lines either high or low for left/right or up/down. Unfortunately without a stand to try I'm not sure I'd see much on a scope as the TV does seem to detect when a stand is connected.

If you have a stand and are able to hook up a scope that would be great. I'll certainly be interested to hear what you might discover.

Kind Regards,

Martin.

Hi BeoMotion,

Were you successful in hooking up a scope?

Hi

Have also been looking at using an Avant 32" CRT motorised stand and mounting a newer TV onto it - know it seems like mutton dressing up as lamb but makes for an interesting project. Did BeoMotion (or anyone else) ever have any success in testing the ports with a scope? Would be very helpful to know!

Thanks very much for your help,

Ben

Stand for MX7000 has a DIN plug 4-pin. 2 for DC power. 2 for data. Inside the stand is a DC motor, some gears that will turn the top. Two circuit cards and a pot-meter for position. Max travel +/-45 degrees. It should be strait forward to hack it to direct dc contol with or without pot voltage return.

Data protocol unknown. Would be nice to know!

Hi, did you, or anyone else, find a solution? These floor stands are now easy to find at low cost and it would be cool to use them as intended, for any TV. I quite easily fitted a VESA bracket with the original bolts.

BeoVision 7-32" Mk 1 motorised TV stand with BeoLab 7-1

According to the service manual, there is the following pin assigment:

1. Pin1: GND
2. Pin2: Turn left
3. Pin3: Turn right
4. Pin4: (?) current position?
5. Pin5: +14V

Does anyone know which pin is which one on connector?

The 7-40 has both pan and tilt in the same connector. The schematic above is properly from a BV7-32?

In order to properly answer the question, I need to know the following, would you consider choosing the TV based on the ability to operate the stand?

Would you accept the BEO4 as a SEPERATE remote for the stand. And are you in the US? if so you might have a better chance.

I have the motorised floor stand of the old BV7-40 MKII, and a 55" Samsung LCD TV.

• The Samsung TV will be attached through a self made adapter plate
• The BeoLab 7-4 will be connected through the "TV Digital Optical Out -> Analog Stereo Converter -> PowerLink Adapter Cable"

I would like to control the floor stand from a NodeMCU V3 micro-controller, which is attached to the USB port of the TV and a separate power supply.

• When TV is starting up, the NodeMCU detects USB power and moves the floor stand in the defined position
• When TV is turned off, the NodeMCU detects that USB power is lost and moves to the zero position
• Optionally, through an IR receiver I could also be possible to manually control the floor stand through a remote (e.g. Beo4)

drmichi wrote:

I would like to control the floor stand from a NodeMCU V3 micro-controller, which is attached to the USB port of the TV and a separate power supply.

• When TV is starting up, the NodeMCU detects USB power and moves the floor stand in the defined position
• When TV is turned off, the NodeMCU detects that USB power is lost and moves to the zero position
• Optionally, through an IR receiver I could also be possible to manually control the floor stand through a remote (e.g. Beo4)

Great simplistic approach! Perhaps this can a bit of help. I believe the control signals are 5V, but they might work with the 3V3 Node I/O. Note they are active low. The feedback can be read by the ADC. I would guess it's centered around 5V but i really don't know! Check the signal before attaching it to the node, you might need to scale and perhaps offset it! This schematic is not that clear but W50 is the cable hanging loose in your picture. I have always wondered exactly how the two active low signals can do FOUR different thing, left, right, up, down. Perhaps you will find out?

Bottom line the BV7-40/55 stand is significantly more complicated than the BV7-32.

EDIT: If you scrap the TV anyway make sure to scavenge the IR receiver board it could come in real handy for your project!

Keep going with that project please!

This motor stand solution via Lintronic might be helpful, too: