BeoSound Ouverture PCB connector types

[Øystein]

Hi everyone!

Does anyone know exactly the type of connectors used between PCBs inside the BeoSound Ouverture? In particular, connectors P46, P49 and P50 on the IR sensor board. I see JST connectors have been mentioned around the forums. Is JST XH the right series of connectors for the BeoSound Ouverture? That’s my best guess, but I’d rather be certain before I order anything as the cheapness of electronic components is very much offset by the shipping cost.

The below is just some extra information I thought I’d add the details in case anyone stumbles across this post with a similar issue as mine, or if you want to know some more details as to what I’m currently doing.

The background for the question is that I am currently in the process of restoring it so that the IR hand sensor works reliably again. The sensors would work, but only with the glass doors and plastic covers removed. I have replaced the IR LEDs and added a few components to compensate for the different properties of the new LEDs. I have everything mapped out on a breadboard, but to make it work for real I have figured the easiest approach is to hook onto the existing circuits via the connectors.

For completeness in the case anyone needs to repair a similar issue: I’ve replaced the IR emitting diodes with TSAL4400’s, which seems perfectly capable of triggering the IR sensor despite the different peak wavelength. I’ve had to add some resistance in series with the two diodes, so for simplicity I’m adding a trimpot (0-50Ohm) to be able to tune the sensitivity of the sensor.

This next bit I am less sure of, but I’ve had to invert the ~{OPEN_DET} signal that goes back to the microprocessor. Either my changes have had some side-effect that I don’t understand, or it could be that one of the transistors in the amplifying chain has failed and is no longer inverting the signal as expected. This is fixed by using an NPN transistor to construct an inverter gate. The collector is pulled up to 5V by a 10K resistor. The collector is also connected to ~{OPEN_DET} going to the microprocessor. The existing ~{OPEN_DET} output from the PCB goes to the base, also with a 10K resistor. The emitter is connected to ground.

 

My B&O Icons:

[Author]

Posts