Connect with us

Old overhead projector blowing bulbs, diode issue...

Reply to Thread

Discussion in 'Troubleshooting and Repair' started by rplydon, Jun 6, 2013.

Scroll to continue with content
  1. Jun 6, 2013 #1
    rplydon

    rplydon

    1
    0
    Jun 6, 2013
    So I have an old Elmo HP-355 overhead projector that just started blowing bulbs. The bulbs are of the 82v 360 watt variety. I am fairly certain that it is using some sort of diode to drop the voltage down from the rectified 110 line voltage to get the 82 volts. As I do not think that there is a replacement part for this anymore, what sort of diodes would I need to replace this part with modern components? Thank you very much.



    https://www.dropbox.com/s/ja7345gb580vsox/IMAG2773.jpg
     
  2. Jun 6, 2013 #2
    duke37

    duke37

    5,273
    733
    Jan 9, 2011
    You can normally check a diode with a meter, they will either be open circuit or shorted. In your case a shorted diode will give too high a voltage

    If it is a diode, which I am not sure, then a 400V 10Amp diode would do. It would need to be in the same configuration to fit to the heat sink. Is there a number on it?
     
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Similar Threads

  1. Old PC PSU Fan issue.

  2. Old projector running wrong directions

  3. LCD Projector

  4. transformer blowing fuses

  5. Projector replacement

  6. SONY Overhead DVD player xvm-r90d

  7. Speaker Issue

  8. scroll saw blowing fuses

Loading...
Electronics Point Logo
Continue to site
Quote of the day

“”

-