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Electronics => Repair => Topic started by: gerovite on October 20, 2015, 01:12:51 pm

Title: Repairing Tektronix 2213
Post by: gerovite on October 20, 2015, 01:12:51 pm

I appeal to owners Tektronix 2213
What should be the waveform in point 9 SWEEP GENERATOR & LOGIC
thanks in advance

Title: Re: Repairing Tektronix 2213
Post by: singapol on October 21, 2015, 08:44:16 am

There is nothing wrong with the waveform except that maybe your oscilloscope's rise time/bandwitdh is not fast enough. Try using X10 setting on probe. The 74Sxx series logic is pretty fast. 

Title: Re: Repairing Tektronix 2213
Post by: oldway on October 21, 2015, 08:49:11 am

Welcom on the forum.

It would be better to describe the problem you have with your scope.
What's wrong ?

Title: Re: Repairing Tektronix 2213
Post by: gerovite on October 21, 2015, 09:54:13 am

Thanks for your kind reply :)

I can not take a picture on the oscilloscope because currently there is no chip 74f74.
 Here is the problem:
  When capture sin in CRT displayed:

Title: Re: Repairing Tektronix 2213
Post by: oldway on October 21, 2015, 10:04:53 am

That's not a very clear explanation...Is the sine wave sincronised ?

Do you display only one channel or both ?

If sine wave is well syncronised and only one channel displayed, it seems to be a blanking problem during retrace.

Title: Re: Repairing Tektronix 2213
Post by: gerovite on October 21, 2015, 10:13:16 am

Quote from: oldway on October 21, 2015, 10:04:53 am

Do you display only one channel or both ?

sorry, it's only one ch

Title: Re: Repairing Tektronix 2213
Post by: oldway on October 21, 2015, 10:27:19 am

Trigger works well or not ?

Title: Re: Repairing Tektronix 2213
Post by: gerovite on October 21, 2015, 10:32:02 am

Trigger work

Title: Re: Repairing Tektronix 2213
Post by: oldway on October 21, 2015, 10:45:58 am

In repair, there is a basic rule: always to start from the beginning and never to rely on the diagnostic made by others.

What You suspect does not interest me, what I want is a detailed description of the problem as it appeared originally.

I do not need you to copy the service manual, I have it too.

Simply answer to my questions !

With your way of responding, whe are going nowhere. :palm: