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  1. #1
    Senior Member chill's Avatar
    Join Date
    Mar 2007

    SB2 IR receiver specifications?

    A few years ago I dismantled an old SB2 to build it into a pre-amp case, along with a miniDSP processor board. I removed the IR sensor from the display board, since the faceplate on my pre-amp would block the default location, and it was always my intention to mount the IR sensor inside a remote 'eye', via a 3-pin plug on the back of the pre-amp. Unfortunately, in the intervening years I've mislaid the IR sensor, so I need to buy another one.

    Can anybody help me identify the correct part? I have some photo diodes for another project, but I think the SB2 pinouts are different - for instance I'm fairly sure that the centre leg in the SB2 part is not the ground pin, like it is on the ones I have. And the package itself was metal I think, with a couple of solder terminals on the package - I'm not sure if they are electrical connections or just mechanical mounting points.

    If I can't find an exact replacement, can anyone suggest a compatible alternative (e.g. which frequency?), and help me with the pinouts?


    PS. This build is the last part of my complete home-built system:
    SB2 ==> miniDSP (via S/PDIF coax) ==> quad channel Hypex UcD power amp (balanced) ==> two-way transmission line speakers.
    The miniDSP gives me exquisite control over the crossovers, the equalisation and the gain for each drive unit, and it will allow for room correction as well. I've only started to scratch the surface of what it can do, but to my ears it sounds wonderful.

  2. #2
    Senior Member KeBul's Avatar
    Join Date
    Sep 2009

    Have a read of this thread...


    I know its for the Touch but there's a couple of references in there to other SB devices...

    user fcm4711 at post #13
    user paf at post #22 and again at post #36 (where he changes the IR receiver again using a different part)
    user StuartHodgson at post #38
    user CrazyFin at post #48

    Good luck


  3. #3
    Senior Member chill's Avatar
    Join Date
    Mar 2007
    Thanks Kev, especially for finding the specific posts in that thread that are most relevant. Now, if you could just have provided direct links to those posts, to save me all that scrolling ......

    I've tried one of my other 38kHz diodes wired up to suit the different pinout order, but I'm pretty sure some other part of the IR receiving circuity is now dead unfortunately. That diode works fine with the miniDSP control board.

    Oh well - it's not the end of the world - I have plenty of other methods to control the SB2. In fact, this 'built-in' SB2 has replaced my Touch as my main source, so the Touch is now configured just to control the SB2, and it works really well. LMS doesn't even seem to know that the Touch is powered up - I guess it only cares whether the 'player' function is powered.

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