Bringing Mr. Dean back to life (Tek 2225 with screwed up power supply)

[Toasty]

Great!  Good job!

 

T

[The Guy]

Been trying to fix the horizontal amplifier issue and now i am puzzled again! I jumpered both leads (in red "A" in the schematic) from the horizontal output amplifier right before the CRT and the dot does not center! ...there is no circuit after that... it should´ve centered. In the working scope it centers just fine. That I don´t understand.

If I put the SEC/DIV selector in X/Y mode the dot centers. Also if I push the beam find button it also appears at the side of the screen.

The voltages recommendations are all in spec except for the voltage readings in red in the schematic which look a little weird.

Any ideas?

[The Guy]

Fixed it! It was a bad contact in one of those ribbon wires... It works as good as new now 

I just added two great working 222five tek scopes to my collection ha!

Cheers and thank you.

[oldway]

Congratulations .... Having at least two analog oscilloscopes of the same model is a solution that I recommend.
One serves as a donor if necessary, this greatly simplifies the diagnosis and repair.

I like very much the hameg hm605, it is the oscilloscope that I use every day and I confess  .... I have 3 of them in good working condition ....

[tautech]

Just as oldway says, congrats.
Charlie and Mr Dean are goers but what about poor Ben, poor poor cannibalised Ben. 

Along to Sphere for bits to fix him ?
http://www.sphere.bc.ca/test/tek-transformers.html

[The Guy]

Just as oldway says, congrats.
Charlie and Mr Dean are goers but what about poor Ben, poor poor cannibalised Ben. 

Along to Sphere for bits to fix him ?
http://www.sphere.bc.ca/test/tek-transformers.html

Thank you!

Problem with Ben is that some sort of gorilla tried to fix it at some point and did a real lousy job... lots of lifted traces, screwed up stuff.. really not good. That doesn´t make me very exited about repairing it to be honest. I think I´ll just leave it as a spare parts scope for fixin future failures of the ones I have working.... or maybe even for repairing another one I could score along the line... I just payed about 40 bucks each. Not big deal I guess 

We´ll see....

All I want now is a 465 or something like that. I already have a 422 and I love it!

[The Guy]

Congratulations .... Having at least two analog oscilloscopes of the same model is a solution that I recommend.
One serves as a donor if necessary, this greatly simplifies the diagnosis and repair.

I like very much the hameg hm605, it is the oscilloscope that I use every day and I confess  .... I have 3 of them in good working condition ....

Thanks! They are pretty good scopes... though they can´t compare with my awesomest Tek 547  But hey, they work just fine!

I was thinking about getting a Hameg  hm 203 but I don´t know much about them.... how do they compare to their Tektronix equivalents?

Cheers

[oldway]

For the Hameg oscilloscopes, I know them well because I have different models.

I have three HM605, one HM1005, one HM1505, I had an HM204-4 but it was irreparable (transformer defective) and I sold it for parts and I have already repaired HM604.

Without any hesitation, my preference goes to the HM605, by far.

NB: repairing an HM605