Connect with us

Voltage output on pins for 1980's monochromatic monitor

Discussion in 'Troubleshooting and Repair' started by heavymod, Aug 12, 2016.

Scroll to continue with content
  1. heavymod

    heavymod

    2
    0
    Aug 12, 2016
    Hello,

    I have a vintage 1981 audio analyzer from the Netherlands. It uses a custom CRT monitor that I do not have access to.

    Monitor.jpg


    I want to test the pins on the monitor plug and determine if they are providing a good signal. The device turns on, fan starts, I can detect voltage on the various internal cards.

    Inside the computer there are 3 pins that go from the "Graphics card" to a DB-15 plug.

    These are the white/blue/yellow wires on the bottom of the photo: IMG_0015.JPG




    These 3 wires to go a DB15 plug on the back of the computer labeled CRT MONITOR.

    When I attach my DMM ( 388-HD ) to the 3 pins that are attached to the card, I get

    PIN1: .3VAC (.06VDC ) .120 Khz
    PIN2: .03VAC (.00VDC )
    PIN3: .04VAC (.00VDC )


    1) What would appropriate voltages be?
    2) Am I able to measure these using my DMM ( I read that low HZ signals could be problematic )
    3) Aside from plugging in a matching CRT, is there anyway to determine some basic level of functionality?

    Any help appreciated!
     
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.
Electronics Point Logo
Continue to site
Quote of the day

-