Tek 220 scope teardown

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This was a broken scope considered beyond worth to repair by service, but I got it working again… (white tape that holds jumper wire going to display connector).

Thank you for service manuals in Internet. Google search and YouTube are repair hacker’s friend.

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2 Comments

  1. Tomi Engdahl says:

    Fixing a broken CCFL Backlight
    http://hackaday.com/2016/06/10/fixing-a-broken-ccfl-backlight/

    When you work at Tektronix and they make a difficult to refuse offer for their ‘scopes, you obviously grab it.

    Jason Milldrum] got his unit before cheaper, and better ‘scopes appeared on the market. It served him well for quite a long time. But keeping it switched on all the time took a toll, and eventually the CCFL backlight failed. Here’s how he replaced the CCFL back light with a strip of LED’s and revived the instrument.

    Searching for an original replacement CCFL backlight didn’t turn up anything – it had been obsoleted long back.

    the CCFL can be replaced by a thin strip of SMD LEDs powered by a DC-DC converter.

    The original DC-DC converter supplied along with his LED strip needed a 12V input, which was not available on the TDS1012.

    TDS1012 LED Backlight Retrofit
    http://nt7s.com/2016/05/tds1012-led-backlight-retrofit/

    Reply

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