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This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
In my DIY project I am connecting my own wireless audio signal directly to the AMP-board inside the BeoLab 8000. To do that I am using the P4 connector on the Amp PCB.
The P4 connector is normally connected via a 3-pin JST PH2.0 cable that goes to the bottom of the speaker unit. Here it connects onto a small PCB in the top of the foot. This connector and cable (see picture) has three wires: black, white and brown. White is audio signal IN, black is ground and brown is for AutoStart.
I understood that AutoStart is a kind of function that causes the speaker to switch from standby to on, when an audio signal is detected. I want to keep this AutoStart function working after I connected my own wireless Audio-IN.
But ... when I connect my wireless input, the Brown wire is disconnected. I think that will cause that I loose my AutoStart function.
Question:
Can you explain better what is your wireless audio?
Are you able to create a 5V signal when you switch your wireless audio device?
Can't you just use the original RCA input?
Martin
My wireless audio is a pcb with audio streaming functionality. I will build it inside the BeoLab 8000.
For powering it, a small ac/dc converter will be added.
I do not want to use the cinch on the outside, because I want a completely wireless BeoLab (except for the power cable).
But I als want the Autostart function with automatic switching of the standby. That’s why I think the brown wire is importatnt.
Does this explain well enough?
Yes, fit the wireless receiver inside the Beolab, run the output from the receiver to the speakers RCA input.You can solder it directly to the RCA solder joints inside the speaker. Nothing visible on the outside.
I am not sure if I got it right from your suggestion. Here's what I mean with connections.The Audio-OUT of my wireless receiver, will be connected with the P4 connector on the amplifier PCB of the BeoLab. So not soldered, but connected via a JST PH2.0 connector.This means, I will disconnect the existing wiring from P4. This is the Black/White/Brown cable that normally connects the cinch plug on the outside in the foot, with the P4 Audio-IN connector on the amplifier board.
To do this, is not a problem. I have done that already, and it works.But the issue is that by unplugging the Black/ White/Brown cable, there is no connection anymore with the Brown wire. I think this is the wire that triggers Autostart (switching standby on/off).
So I try to understand how the Brown wire s connected to the system, and how it works. So I can find a way to keep the Autostart functioning.
I mean, why break any circuits inside the speaker, when you can connect your audio out to the RCA input (albeit from the inside of the speaker)?The auto-start circuit will then be intact.
Answer:
1. Send audiosignal to both P4.1 and P4.2. P4.3 is ground
2. Brown wire carries the same signal as send over P4.1 to detect audio. Switching on/off is done on main PCB.When brown wire shortned to ground the autostart is then disabled.
With the above suggestion, keep the switch at the bottom on Line. Otherwise audio will be muted when it's set on Left or Right.
Question:.
1. Why don't you become a silver or gold member? In that case you can download the servicemanual with it's diagrams.
If I use the RCA input on the outside, my additional electronics are also outside.Again, my intention is to make the speaker wireless for audio input. So that also means that additions should be invisible.Thanks for thniking with me Martin!