Had an offline discussion with Kibi when he was repairing his Tek 2445 (
Here) that he had to lift the huge A1 board, the mounts & connections which is identical to 2465/B, and he shared few photos that I think will be useful if anyone plan to detach the A1 board, and I think this photo tips is valueable and never seen elsewhere even at the Yahoo Tek maillist.
Thanks and credit to Kibi for allowing me to share this photos here.
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif)
Quoting his tips & photos on detaching the A1 board :
1. Must unsolder the wires that go to the X and Y plates.
![](https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/?action=dlattach;attach=87803;image)
2. Now, I did not remove this PCB (HV) because it looked quite difficult to remove. The A1 PCB is easy to remove without taking this board out, but it's a bit more difficult to put the A1 back in because the pins don't line up nicely because of the A1 being at an angle when you put it back.
![](https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/?action=dlattach;attach=87805;image)
3. Don't forget where these coax cables go and their orientation, (take some pictures).
![](https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/?action=dlattach;attach=87807;image)
4. After removing the plastic front bezel, you must remove the strip of aluminium here to allow the front end BNC's to come out clear.
![](https://www.eevblog.com/forum/testgear/tektronix-2465b-oscilloscope-teardown/?action=dlattach;attach=87809;image)