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  • yamaha YC light bulb/LED?

    my Yamaha yc45 needs a lamp for the expression pedal, as well as aftertouch

    specs are for a 5v 20amp bulb...can I replace this with an led instead, for longer life, and possibly better performance

    any suggestions for a part #?

    thanks!!

  • #2
    The original bulb type will last for years. Just make sure you get exactly the same specs. I found a couple of vintage bulb specialists when I needed a bulb for the optical tremolo in my Farfisa Compact Duo.

    The behaviour of the bulb can affect the envelope in some cases so changing to an LED might not give desirable results for aftertouch. On my Farfisa there are two types of tremolo, a smooth bulb driven one and a neon driven choppy repeat. The speed that the bulb lights affects the envelope. Might not be a problem in your situation but worth considering.
    Hammond C3, M102, H112, XB3, XB5, X5, TTR-100
    Lowrey Heritage DSO-1, Yamaha E70
    Farfisa Compact Duo Mk2, Vox Continental 300, Gibson G201, Korg BX3 Mk1
    Leslie 122 x2, 145 x2, 910
    www.drawbardave.co.uk

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    • #3
      thanks Dave!

      I bought a lamp for the pedal, but it burned out within 30min.

      must have been the wrong amperage, it wasn't listed on the package.

      but 5v was

      Comment


      • #4
        5 volts at 20 amps = 100 watts. That's enough to light the whole room and seems very, bright for an expression pedal bulb. Are you 100% sure of the rating? What did it say on the old bulb - they're often marked with V and A ratings.
        It's not what you play. It's not how you play. It's the fact that you're playing that counts.

        New website now live - www.andrew-gilbert.com

        Current instruments: Roland Atelier AT900 Platinum Edition, Yamaha Genos, Yamaha PSR-S970, Kawai K1m
        Retired Organs: Lots! Kawai SR6 x 2, Hammond L122, T402, T500 x 2, X5. Conn Martinique and 652. Gulbransen 2102 Pacemaker. Kimball Temptation.
        Retired Leslies, 147, 145 x 2, 760 x 2, 710, 415 x 2.
        Retired synths: Korg 700, Roland SH1000, Jen Superstringer, Kawai S100F, Kawai S100P, Kawai K1

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        • #5
          The YC-45D expression pedal lamp is a 24 volt 5 watt bayonet type (push in and twist) incandescent lamp, originally made by Toshiba. This is written on the side of the original lamp.

          The after-touch (Touch Vibrato) uses the same bulb.

          Yamaha ran these off 12 (or 14 if I recall correctly) volts DC, so the lamp would last (almost) forever.

          The service manual can be found here:

          http://manuals.fdiskc.com/flat/Yamah...e%20Manual.pdf

          Joe

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          • andyg
            andyg commented
            Editing a comment
            Thanks! Those ratings make more sense, don't they! :)

        • #6
          weird, I thought I had gotten the specs from the service manual....I had downloaded it before

          but I just x2 checked and it is indeed 24 volt 5 watt!!

          I must have gotten my wires crossed. no wonder I'm having a hard time finding a bulb with those specs :D

          possibly someone had stuck a different bulb in there, not sure if I still have the old one

          thanks again!

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          • #7
            My Compact Duo had the wrong bulb in the tremolo and it caused havoc. Realising it had the wrong bulb was the last thing I checked!
            Hammond C3, M102, H112, XB3, XB5, X5, TTR-100
            Lowrey Heritage DSO-1, Yamaha E70
            Farfisa Compact Duo Mk2, Vox Continental 300, Gibson G201, Korg BX3 Mk1
            Leslie 122 x2, 145 x2, 910
            www.drawbardave.co.uk

            Comment


            • #8
              I have just joined this group as I have removed by YC 45D from storage and there is minimal volume. Could you please post the instructions on how to open the expression pedal?

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