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Electronics => Repair => Topic started by: psykok on March 05, 2019, 10:15:27 am

Title: Tektronix 7313 repair
Post by: psykok on March 05, 2019, 10:15:27 am

Hi,

Just bought a some instruments and got this Tektronix 7313.
(https://uploads.tapatalk-cdn.com/20190305/51263ab604dbc42f34a116a0ac981468.jpg)

The scope is turning on but the screen get totally green after a few seconds.
(https://uploads.tapatalk-cdn.com/20190305/7853c9e47528dcaf7b799e7b4244bdee.jpg)

If I install the 7b53an module in any of the 3 places, the scope is loosing the 5v rail (the plug-in is working, no issue with it)
Installing a vertical module like the 7a15 is not disturbing the 5v.
(https://uploads.tapatalk-cdn.com/20190305/24962326ec7aa2763935037cef7934b2.jpg)

Any idea what could cause this issue?

I will sign the PSU tomorrow to check if something is bad there.


Alex

Title: Re: Tektronix 7313 repair
Post by: David Hess on March 05, 2019, 11:21:35 am

The 7313 is an analog storage scope so the CRT includes a flood gun which illuminates the entire CRT depending on operating mode.  So what you are seeing is normal depending on the settings.

Title: Re: Tektronix 7313 repair
Post by: anotherlin on March 20, 2019, 07:31:13 pm

Can you update us on the repair?
I just bought a 7313 from ebay.com but it arrived broken!
I will soon start the repair process.