Tektronics 2213 Scope Repair

[RonnieEEVBlog]

Hi,

I recently purchased a Tektronics scope 2213 60MHZ from Ebay. While testing it, I noticed that when both the channels are active, the display becomes very dim and starts flickering. But if I watch each channel separately, it works fine.

Does any one know what is going on here and is it safe to open the hood and look inside when power is disconnected, when you have zero experience ?

Regards,
Ronnie

[oldway]

Welcome op EEVBLOG.
That's TEKTRONIX and not TEKTRONICS.
Don't open the hood of your oscilloscope, there is probably no fault, only a wrong operating. (alternate selected instead of chopp)
Read first the user manual to learn how to operate it.
http://user.physics.unc.edu/~sean/Phys351/techresource/docs/2213%20User%20Manual.pdf

[RonnieEEVBlog]

Hi,

I checked that. My settings are as follows Vertical Mode: BOTH & ALT & under trigger its is VERT MODE.

Regards,
Ronnie

[oldway]

Please read the instruction manual first .....

[tautech]

Does any one know what is going on here and is it safe to open the hood and look inside when power is disconnected, when you have zero experience ?

You can but with zero experience what do you expect to see?
Truth is without considerable experience you'll see nothing.

There are a few things that can bite even powered down and from what you describe there may be nothing wrong with it only the way you're using it.
Oldway's advice is sound, RTFM.
Basic manual advice will include nominal settings to observe a waveform, the best to play with initially is the 1 KHz square wave from the probe calibration output.
After becoming comfortable with the cal output then a low voltage AC, say from an AC wallwart (never straight mains) will give a sinewave.
Just printing the basic setting part of the manual is handy for scope newbies like you.
Enjoy and be careful.

BTW hunt out Daves vid on "how not to blow up your scope"

[David Hess]

Hi,

I checked that. My settings are as follows Vertical Mode: BOTH & ALT & under trigger its is VERT MODE.

Regards,
Ronnie

Well, there's your problem.  Read the manual.

If ALT sweep and VERT trigger is used, then the oscilloscope will do alternate triggering which is tricky to use and only applies for specialized applications.

Either use CHOP mode or set the trigger to channel 1 or channel 2 when displaying both channels.