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Thread: Just picked up a Kaypro II. Have some questions.

  1. #11

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    Quote Originally Posted by pski View Post
    Let us know if it works.
    Will do, it may be a little while before I get a chance to test it though haha.

  2. #12

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    Quote Originally Posted by WMH View Post
    Will do, it may be a little while before I get a chance to test it though haha.
    Don't wait another 3 years!

  3. #13

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    Quote Originally Posted by pski View Post
    Don't wait another 3 years!
    Don't worry, I don't think I'd have the self-control to let a great new machine sit that long!

    I've gotta get through my finals before I'll have the time to mess around with it though...

  4. #14
    Join Date
    Mar 2013
    Location
    Chaffee, MO
    Posts
    1,460

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    Here is the information I posted several months back.

    http://www.vcfed.org/forum/showthrea...ghlight=kaypro


    Larry

  5. #15

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    Quote Originally Posted by ldkraemer View Post
    Here is the information I posted several months back.

    http://www.vcfed.org/forum/showthrea...ghlight=kaypro


    Larry

    Oh awesome, thanks! If that cable I ordered doesn't work out, that'll definitely come in handy.

  6. #16

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    Hey everyone, just an update on my Kaypro.

    I got home from college last night, so I was finally able to test the machine myself. It booted up fine, and the keyboard cable I bought was working great (I know you'd asked about that Pete.) After an hour or so, the E key started dying on me. I assumed the keyboard just needed a little TLC, so I unplugged everything for the night with the intent of looking into it more today.

    However, when I plugged the machine in this morning, it refused to turn on at all. Nothing was on the screen and the drives weren't spinning. I popped the fuse out and it looked OK, so I unscrewed and removed the top of the case. I did a quick visual inspection of all the caps and soldered connections I could see, and I started to remove the logic board when I realized that I had no idea where to start.

    So I was wondering, have any of you guys had a similar problem with your Kaypros. If you have, where do you think I should start looking?

    Thanks
    -wmh

  7. #17
    Join Date
    Mar 2013
    Location
    Chaffee, MO
    Posts
    1,460

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    First check the Power Supply for an input of 115 VAC, then check the Output Voltages. +5.00 VDC, + 12.0 VDC, and -12.0 VDC.

    1-6 POWER SUPPLY. The power supply used in the KAYPRO II
    computer is either a California DC power supply or a Boschert
    power supply. Both supply plus and minus regulated 12 VDC and +5
    VDC and dissipate approximately 60 watts. One important
    difference between them is that the Cal DC power supply has two
    five-watt power-dissipating resistors located in the upper corner
    (these are the 1K & 10K Ohm rectangular ceramic resistors) that
    normally get quite hot. Therefore, the power supply cables nearby
    should be tied down behind the power supply circuit board, or
    damage could result. There are two fuses associated with the power
    supply: one (2 Amp) accessible on the back panel of the KAYPRO II,
    and the other (3 Amp) on the power supply board. If work is done
    on the power supply, make sure that the plug is oriented correctly
    when reconnected, with the black wire on top and the white and
    green wires underneath. To change the power supply from 110 VAC
    to 220 VAC, refer to Figures 1-6 (A) & (B).

    Larry
    Last edited by ldkraemer; May 12th, 2016 at 04:35 AM.

  8. #18

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    Quote Originally Posted by ldkraemer View Post
    First check the Power Supply for an input of 115 VAC, then check the Output Voltages. +5.00 VDC, + 12.0 VDC, and -12.0 VDC.
    Hey Larry, thanks for the advice. The other day I opened up the machine to start testing voltages and I decided that I might as well try reseating all the power and data connectors on the logic board. The thing started right up! I'm still not sure what was wrong; the only thing I can think of was that letting it sit upright (on the keyboard) overnight dislodged something inside.

    I've kept it horizontal for the past few days and it seems to be working consistently now. I'll probably open it up in a few weeks time and clean the dust out of it, but it's actually surprisingly clean on the inside considering that it turns 34 this June.
    Last edited by WMH; May 15th, 2016 at 02:10 PM.

  9. #19

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    Quote Originally Posted by WMH View Post
    After an hour or so, the E key started dying on me. I assumed the keyboard just needed a little TLC, so I unplugged everything for the night with the intent of looking into it more today.
    The foam pads inside the keyboard are probably deteriorated. Other keys will likely follow and start failing. I did a major restoration job on my Kaypro and had to replace the foam. You can either go the cheap and time consuming route like I did and use weatherstripping, or go the expensive route and order pre-made foam pads off ebay.

    However, when I plugged the machine in this morning, it refused to turn on at all.
    Mine had quit on me also. I found a pin on one of the connectors had come loose, so I popped it back in.

    I did a detailed post on what I did to restore my Kaypro here:

    http://www.classicalgasemissions.com...-computer.html

  10. #20
    Join Date
    Apr 2007
    Location
    Saraland, AL just north of Mobile
    Posts
    79

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    Hi guys,
    Thought I would add a final note about using a phone cord as a keyboard cable. Here is a picture of my Kaypro 4 running with a beige ATT handset cord as the keyboard cable.
    Maybe it will help resolve the uncertainty.

    Phillip


    100_1980.jpg

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