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HP scanjet tma

Discussion in 'Hardware' started by palomino, Apr 16, 2008.

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  1. palomino

    palomino Thread Starter

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    I have been given a new TMA unit and I know that it requires 12 vdc to operate. I opened the TMA and find that it only uses two pins of the connector. Internally, one wire is red and the other is white. The unit is made in China. Would anyone know which lead is plus potential and negative potential?
     
  2. kfinpgh

    kfinpgh

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    The normal rule is that red is hot (positive) and white neutral (negative) or ground.
     
  3. palomino

    palomino Thread Starter

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    That is the way I was leaning, thinking red is hot or positive. Just needed to see if anyone else thinks like I do. Thanks!
     
  4. palomino

    palomino Thread Starter

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    Yes, red was positive and white was negative. Got light to work fine. Now problem is I can not scan correctly. Part is due to the TMA not being designed for my scanner. When trying to scan, the scanner bed lamp is also on so the result is too bright images of the results. Does the TMA on a correct scanner interrupt the internal lamp with one of the unused pins in the TMA plug? Has anyone ever tried disabling the scanner bad lamp and trying a noncompatible TMA? I sure hate tearing up my C5180 All-in-One unit just to scan slides. Anyone ever tried this?
     
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