Replacing incandescent bulb on Pioneer LD player with led. Need help :)

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  • JimBanville
    Senior Member
    • Aug 2020
    • 118
    • United States
    #1

    Replacing incandescent bulb on Pioneer LD player with led. Need help :)

    I have a pioneer dvl-909 LD/dvd player from 1998. It has a light on the front panel that lights up when you play a dvd. I removed the bulb and it appears to be a tiny incandescent bulb. Its measures "open"/dead and the bulb is black like it's blown. The socket it fits into measures 5v. I've looked up the schematics and there's no indication of the amperage. I don't want to spend any money on new parts, but I have a pack of like 100, 3v, 20ma LEDs and I have various resistors.
    Is there a way for me to determine the amperage going to the old dead bulb with my multimeter?
    I don't mind blowing a few of these LEDs, but I don't want to damage the player's circuitry. What LED, resistor combination should I use?
    Thanks!
    Tags: None
    • JimBanville
      Senior Member
      • Aug 2020
      • 118
      • United States
      #2
      Re: Replacing incandescent bulb on Pioneer LD player with led. Need help

      The schematic seems to show the bulb with a diode (led) icon, but it looks like an incandescent bulb...
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        • redwire
          Badcaps Legend
          • Dec 2010
          • 3900
          • Canada
          #3
          Re: Replacing incandescent bulb on Pioneer LD player with led. Need help

          Lamp VEL1022, the same style is used in car dashboards called T3 or T4.2 or T4.7 depending on OD. So it has a base and might be a 5V grain of wheat lamp like used in model trains.
          I'd replace it with a white 3mm or T-1 size LED plus 100Ξ© series dropping resistor if you cut a PCB trace. Or scavenge an LED out of some junk. You can remove the bulb from the base if you want to fit it in that. I'd just solder it to the board.

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            • JimBanville
              Senior Member
              • Aug 2020
              • 118
              • United States
              #4
              Re: Replacing incandescent bulb on Pioneer LD player with led. Need help

              Originally posted by redwire
              Lamp VEL1022, the same style is used in car dashboards called T3 or T4.2 or T4.7 depending on OD. So it has a base and might be a 5V grain of wheat lamp like used in model trains.
              I'd replace it with a white 3mm or T-1 size LED plus 100Ξ© series dropping resistor if you cut a PCB trace. Or scavenge an LED out of some junk. You can remove the bulb from the base if you want to fit it in that. I'd just solder it to the board.
              Excellent! Thank you.

                Comment

                • CapLeaker
                  Leaking Member
                  • Dec 2014
                  • 7982
                  • Canada
                  #5
                  Re: Replacing incandescent bulb on Pioneer LD player with led. Need help

                  When I do LED conversions I use a LED driver something like an AL5809 etc. It keeps the guesswork or calculating the proper resistance for the dropper resistor out of mind plus you can use much higher voltage rails too. Makes it very convenient and efficient. Whatever anyone prefers, I guess…

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