Need Monitor for Apple ii+

Discussion in 'Apple Collectors' started by senseless, Nov 12, 2015.

  1. senseless macrumors 68000

    senseless

    Joined:
    Apr 23, 2008
    Location:
    Pennsylvania, USA
    #1
    Someone is giving me an Apple ii+ system with everything except the monitor. Are there any modern VGA monitors or adaptors that can display color composite output decently? Will it plug into a conventional HDTV with composite in?
     
  2. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #2
    If your TV has composite video in (RCA jack usually yellow in color) it's highly likely it will work.

    Don't expect a sharp crisp display. Color fringing will still be evident and you probably won't get 80 column to be readable (if fitted to the Apple II).

    There is a chance it won't work, but you've got nothing to lose in giving it a go.
     
  3. senseless thread starter macrumors 68000

    senseless

    Joined:
    Apr 23, 2008
    Location:
    Pennsylvania, USA
    #3
    I tried a video to VGA converter and it would not do anything on my LCD monitor. I also tried going to RCA video in on my Plasma flat screen TV and it won't sync. Just a bunch of moving static when the computer is on. I'm sorry I didn't keep any of my old CRT monitors now.
     
  4. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
  5. senseless thread starter macrumors 68000

    senseless

    Joined:
    Apr 23, 2008
    Location:
    Pennsylvania, USA
    #5
    You gave me a good idea. I'll try some yard sales.
     
  6. iPhonagain macrumors newbie

    iPhonagain

    Joined:
    Dec 28, 2009
    Location:
    Indy
    #6
    I have a Apple II+ Monitor, can test if it still works if you're interested.
     
  7. senseless thread starter macrumors 68000

    senseless

    Joined:
    Apr 23, 2008
    Location:
    Pennsylvania, USA
    #7
    I'm doing that today with a friend that also has an apple monitor, but thanks!
     
  8. senseless thread starter macrumors 68000

    senseless

    Joined:
    Apr 23, 2008
    Location:
    Pennsylvania, USA
    #8
    I tested this Apple II on an Apple composite monitor and it turns out the video coming from the computer is bad. Squiggly diagonal lines from all outputs, including the output of the RF modulator and 80 column card. Anyone know what chip(s) might be bad?
     
  9. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #9
    Did you get a pic or video?

    Also, a pic of the full motherboard might show an obvious problem such as missing ICs.

    Check video cable is working with another video source or multimeter/continuity tester

    Check voltages from power supply. +5v, +12v, -5v, -12v

    Try removing ANY/ALL expansion cards (make certain power is off and removed)

    Try pressing down on all socketted ICs. You may hear crunching sounds - this is normal as the ICs re-seat.

    Check all ICs for corroded/broken pins - not easy but may be necessary.


    Finally, from Level II diags check the following ICs specifically. The locations noted (eg C11) are board locations, ie - Row 'C' Column '11'.

    Videos wavers - C11 - 74LS04

    Video distorted - D2 - 74LS20

    Horizontal lines/junk chars. - B5 - 74LS174
     
  10. senseless thread starter macrumors 68000

    senseless

    Joined:
    Apr 23, 2008
    Location:
    Pennsylvania, USA
    #10
    Thanks, I'll let you know how I make out. It's surprising how accessible this board is for hobbyists.
     
  11. senseless thread starter macrumors 68000

    senseless

    Joined:
    Apr 23, 2008
    Location:
    Pennsylvania, USA
    #11
    Got it working! It turned out to be either B14, C14, D11, D12, D13 or D14. I changed them all at once so I'm not sure which did it. I have video out going to an HDTV video input and it's color fringing pretty bad, but this may be normal. Thanks again


     
  12. MacTech68 macrumors 68000

    MacTech68

    Joined:
    Mar 16, 2008
    Location:
    Australia, Perth
    #12
    Great news. Glad it's now booting up. The color fringing is pretty normal, so don't be too alarmed by it.
     
  13. senseless thread starter macrumors 68000

    senseless

    Joined:
    Apr 23, 2008
    Location:
    Pennsylvania, USA
    #13
    Yes, I do recall needing both a color monitor and a monochrome for text.
     

Share This Page