sssayers
Joined: 17 Jun 2005
Posts: 4
Location: Pacific NW, USA
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 Posted:
Fri Jun 17, 2005 6:12 am Post subject:
Goldstar OS-7020 Oscilloscope |
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I just bought a used OS-7020 oscilloscope. Its a dual channel scope, but channel 1 doesn't work.  There's no trace displayed at all for channel 1. Channel 2 appears to be fine. It's not user error. So, I'm looking for ideas on what it could be. I don't know the internal workings of o-scopes well enough. I think the crt has to be a dual-gun tube. Is that right?  Could it be a bad gun in the tube? That's what worries me the most as it may not be available. The electronics are nicely layed out and all pots are nicely labeled. If its a bad component, it may not be hard to fix.
Do you have any info on Goldstar? Did they make a service manual? Who repairs and calibrates them in the US (Washington State)?
Thanks, Sam
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