[Techtoolslist] Problems with Tektronix 475 Scope
John Robertson
jrr at flippers.com
Wed Feb 13 15:32:07 EST 2019
Hi Matt,
Do you have the Maintenance manual from the FTP /Techtronics section?
Have a few service related manuals there...
ftp://ttl.arcadetech.org/TTL/Test_Equipment/Tektronix/
I have the operators manual in my 475 that isn't scanned yet...should do
it some day I guess.
John :-#)#
On 2019/02/13 10:08 a.m., Matthew Rossiter wrote:
> Hi Everyone,
>
> I'm starting to have some issues with my Tektronix 475 scope where
> after it warms up for about 5-10 minutes the beam goes out.
>
> If I press the ch1/alt/add or ch2 buttons I see the beam flash
> on/off. Same if I turn the trigger or delay knobs it comes in and out.
>
> Pushing the chop button brings both ch1/ch2 beams on for some reason.
> After a while the beam will come back. Letting the scope cool off
> will normally bring the beam back.
>
> Last year I did clean some contacts - this seems to be heat related
> though. Has anyone seen this? or is there forum out there that
> someone recommends specifically for old tek scopes?
>
> https://youtu.be/GZxO8YkzaBM
>
> Thanks!
>
> Matt
>
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