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Drive gear for Sharp CD mech

Discussion in 'Electronic Repair' started by Franc Zabkar, Aug 3, 2006.

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  1. Franc Zabkar

    Franc Zabkar Guest

    I need the drive gear for the sled motor for a Sharp H8134AF laser
    assembly out of a GX-CD555Z(GY) portable 3-in-1 unit. Its dimensions
    are 6mm high, 4.5mm OD, 2mm shaft dia (suits RF-310T-11400 motor). It
    has 11 teeth. TIA for any assistance.

    - Franc Zabkar
     
  2. Arfa Daily

    Arfa Daily Guest

    Franc

    I have stolen gears from many different mechs to replace ones that have
    split in the position where you've got the bad one. Some have 13 teeth, but
    they appear to run just as well with no tightness or tooth misalignment. If
    you have a scrap DVD deck in your junk box, there's a good chance that the
    sled drive pinion will do the job. If the one you find has a lip around the
    bottom edge, it can simply be put on the shaft the other way up. Good luck !

    Arfa
     
  3. Franc Zabkar

    Franc Zabkar Guest

    Thanks. I tried a 12-toothed pinion and it appears to work. It's a bit
    noisy during a full traversal of the sled, but it feels smooth enough
    by hand.

    I now have a second problem, most likely a weak laser. It's an auto
    power control type which I suspect has maxed out. There is a Sharp
    IR3C07N laser diode driver IC on the laser assembly. I tried
    increasing the laser current by about 20% by shunting the series
    current limiting resistor on pin 1. But no joy. :-(

    - Franc Zabkar
     
  4. Arfa Daily

    Arfa Daily Guest

    Ha. That's a shame. It's always a real pisser when you do something really
    clever like fixing a drive mech from the junkbox, only to find that the
    laser is naff. The life of a service engineer eh? who'd want it ... ?

    Arfa
    --
     
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