On Sun, Dec 5, 2021 at 03:17 AM, Mark Vincent wrote:
151-0367-00
Hi Marks.
Thanks for the nice inputs.
9V zener is OK so is its resistor. The 1K uF cap replaced even if old measured good.
After recapping the entire psu, all voltages test good, and no/little ripple shows on any line.
On my screen I have a single dot. Focus and intensity works fine. Stays same for long time.
When I turn the timing switch, the blinking of this dot varies, but it does not move along the screen.
I can connect a signal but there is still just a dot, so think the vertical part also has a beating as it should show up 2 dots (high and low).
Dot can not be moved with vert position pots neither for chan one or two.
Horisontal movement with pot is only about one division on screen.
Pressing beam find moves the dot slightly and ofcourse the timing / blinking stops.
Transistor testing is tidious, and I have not found any leaky / shorted yet. Will continue. Swapped the IC's but they test good, and work fine in other scope.
I also have a working 465 wich can be handy to take live measurements on, however it looks terrible.(obviously been used mobile or been moved around some...could be run over by a truck as well :)
This one looks unused, but sadly not working.
Might swap parts or entire boards into the nicer looking one.
Hugo
