Tektronix 465 Oscilloscope

[j@cs]

Hi, I have recently buy a 465 in good conditions but it`s front panel is quite a bit dirty. When I tried to remove the buttons to clear it, I couldn`t remove the delay time button and also that one that you have to pull to limit the bandwidth.
The delay time button is a bit complex and I`m afraid to damage it without any tips. And regarding to the BW limit button I`m afraid to pull it hard and break something. Does anyone there can give me some tips or even post some photos, if there are any, to help me?

Thanks guys.

[ebclr]

http://download.tek.com/manual/070940300.pdf

[j@cs]

ebclr, thanks for sharing the manual. Actually my oscilloscope is the Tektronix 465. Not the TAS 465. I am attaching a image it`s front panel.

[rhb]

Look here:

http://bama.edebris.com/manuals/tek/465/

[j@cs]

Thanks for the tip rhb.
I visited the link and downloaded the manual. But it is incomplete and didn't show how to disassemble the front panel.

[bd139]

I’ve done a few of these. To remove the delay time knob, there is a grub screw on the top half of the knob. Undo that. It will slide off. Under that is the main body of the vernier control. You need some long needle nose pliers to unscrew the big ring around the shaft. Whole thing will come off the front panel then. Watch out because the pot can fall inside the case. The rest of the controls are straightforward.

Don’t take the buttons off if you can help it. The shafts break easily. Just push in, clean, pull out, clean. Contacts for the bandwidth limit are at the opposite end of the scope to the button to give you an idea how complicated they are to get out!

The bulb indicator shafts pull out and can just be pushed back in after.

[rhb]

I looked at my original manual and there's very little discussion about disassembly.  No mention at all about the front panel.