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Vanløse, Copenhagen, Denmark
Mathematician. Working programmer/system developer. Nerd. Married. Father of 3.


Scope dead but a new (old) one acquired + nice gear

Last week my good old scope (Trio-Kenwood CS-1022 20MHz) decided that she'd had enough of me and simply stopped sweeping horizontally. It happened when I accidently had her turned on for two full days. When I discovered that she was on, this was the sight I saw:

(the dot looks bigger in the picture than irl). I think it might be the horizontal deflection coil or the circuit driving it. I will at some point try to repair it, I think.

Luckily, about 1 week before this incident, I'd been contacted by one on my old friends Jarl from my days of studying math and computer science at the university. He wrote that he had some old gear stashed away in his basement, and that he would gladly donate it to me, if I could find any use for it. It was an old scope and an old EPROM-programmer. The timing couldn't have been better };-P

The following weekend we'd hired a car anyway, so I drove to Jarls place to get the goods. We had a nice nerdy chit-chat about 'the good old days', EPROMS, C64, The CoreBoot Project and a lot more };-P

Then we both drove back to my place, so he could have a look at my own little repair workshop. We tried to connect the scope (Telequipment D65 15MHz), and she works like a charm with a nice crisp and steady picture:

As a pure bonus, she has a really nice retro-look; I'm back in the arcade-repair business! };-P

Now as for the EPROM-programmer (Sunshine EW-704), it connects to an ISA-slot. I didn't own any PC with ISA-slots, but Jarl was kind enough to donate me his old 486DX2 as well. We couldn't get in contact with the hard drive for some reason, but as the software for the programmer is written for DOS and consists of only one exe-file, it fits nicely on a DOS bootdisk.

The external module with the 4-gang of ZIF-sockets fitted nicely in the disc-slots on the front of the PC, so I choose to mount it there };-P

This programmer actually does Vpp=25V (something not possible on my Top2005+), so now I can program those old 2716 and 2732 EPROMS as well; totally jawsome };-P

I really owe Jarl a big thnx for the kind donation...really helps me keeping them old boards alive };-P


  1. Regarding the EPROM programmer: You can download the latest version (2.1) of the programmer software that was released prior to the closing of Sunshine electronics right here. I suggest you download it because it may have fixed the issue that the software I gave you did work properly when the turbo switch is on (66Mhz) so you have to run in 33Mhz mode. Try the V2.1 of the software and see if it works in 66Mhz mode and let us know if can work in 66Mhz mode.

    Regarding the scope: You can see I rewritten the numbers around the dials with a marker because the original labels was torn off.


    1. Just tried. V2.1 and it is much more stable when reading. Also I successfully programmed a 2732 (with the classic algorithm 50ms/address) with the "Turbo-button" active };-P

  2. Hi Elgen,
    I happened to be given a CS1022 scope the same as yours. I have never used one before but wish to learn to use it.
    It gets power but I get no display at all on the screen. Wondering if you would have any idea where I should start looking to try and repair it.

    Also is it good enough to perform diagnostics on arcade boards?

  3. Hi Jason

    A CS1022 wil surely be good for arcade diagnostics/repairs. I haven't used any other scope until it died on me.
    Unfortunally I have no idea as to how you should start repairing it, if it is broken. But I wish you good luck in doing so, and please report back on your progress.

    };-P Elgen