Tekronix 2235 Oscilliscope - No Horizontal Sweep - only vertical signal.

[AcousticBruce]

I am trying to troubleshoot this oscilloscope and I was hoping that you can join me on my adventure!

History....

Tested at warehouse and got a 1khz signal on both channels.
Took home from a smooth ride in my jeep and set it on bench. Next day fired up and it was not working.

Manual...

I have the Operators Manual / Service Manual / Tektronix repair your oscilloscope guide.


What is it doing? I uploaded a vid to Youtube ->> https://youtu.be/tof9Hp0yYAo

-No traces without using beam find. AT ALL. NONE.
-No horizontal time reading.
-The video shows me doing many tests with the buttons while holding beam find.


I as well as others seem to think this is in the horizontal circuit somewhere. Also there is a chance that one of the buttons is sticking and needs replaced. Either way I was hoping that you all can check out the video so you can see EXACTLY what my scope is doing and maybe you can help guide me for a less frustrating experience.

I am reading the manuals and there is a lot I do not understand with troubleshooting. I do know about all the high voltage and understand how to be safe.

What do you all think? Thank you so much!
-

 

[KeepItSimpleStupid]

I can't see a good pic of the front panel and what you have the controls set at. beamfinder is working properly.

The intensity control may actually be turned down.

I need to see a shot of the front panel, so I can see the controls.

Many times you actually use channel 2.

It seems like a classic problem in which you don''t have the trigger set right or the intensity is turned down. The fact that beamfinder shows a real signal, your intensity control may have gotten bumped.

I need a pic of the front panel with the probe in the cal slot.

 

[ronsimpson]

It looks like the intensity knobs(s) are turned down.

 

[AcousticBruce]

Wow good thing I did not take out any circuit boards. The intensity was the only issue. Thanks for the help. Problem solved.

 

[ronsimpson]

LOL.
It was hard to see in your video.
Good deal!

 

[KeepItSimpleStupid]

Exactly. It was very difficult to see the control positions. You kept focusing on the waveform. Half of the fun is getting a first time trace.

 

[atferrari]

Albeit there was a trouble going on and eventually somebody could be shooted for all this, could we call this actual "troubleshooting"?

Good to know that the problem was solved.