Hi Christophe,
My comments are below.
On Mon, Mar 14, 2022 at 12:58 PM, clunche wrote:
Hello gents,
Almost there! I received the Allen key 1/16" today and could remove the upper
knob of the time base switch and I did inject cleaning spray along the shaft
and it seems to help. Actually, I located the issue in the delayed B time base
actuation via the pulling of the knob: it sometimes does not go back correctly
and I can see the DLY sign still on time to time. However, and this is good
now because when properly pushed back, then powering on and off the scope
brings the correct screen and the trace is nice! So the issue is truly located
there.
Great news, looks like you are close to fixing the scope for good.
Now, if I have successfully removed the first time base knob, I am stuck at
removing the plastic part associated with the 3 springs. I have seen what I
thought to be a miniature screw but it is not - a kind of key - which keeps
the spring always in tension. I need to carefully remove this small black part
but it seems well locked inside. I've tried with a small thin plier but I'm
afraid to break it. What do you recommend?
Unfortunately 2465 knob is different than 2467B knob so I don't have any direct knowledge. However, page 6-27 of service manual describes removal of the A/B timebase knob. It only mentions set screws.
Could you also please confirm from the schematic diagram that the B switch is
J601 marked as PUSH ALT PUSH B and it could the one I really need to clean?
But if it is part of the switch also I'm afraid I am kinda stuck to reach it.
Any advice there will be appreciated.
Yes, it is the switch. Hopefully by following page 6-27 you will be able to access to it.
Ozan
