fezder
Well-Known Member
Hi!
previously, i made an error by repairing many scopes in same thread, but now, as fellow member pointed out, different scopes=different thread. Sorry for previous confusion folks!. but now for this issue:
The faulty part, at least one of them, is located at y-amp section (vertical), and it's on ''positive'' portion of mirrored section. Burned component, is r95 in schematic (page 27, on REAL pdf page numbering, 25 on scanned manual). resistor is rated 100 ohms
now, if i just replace resistor, it probadly just burn out again, as something is the reason why it burned out.
obserwations from front panel settings: x-y setting doesn't work, do dot beam, beam slides from left to center, about 2 div high. volts/div knob doesn't do a thing at signal.
outside of x-y setting, volts/div still won't affect, but time/div knob does work.
position knobs won't work either well, at either state. beam ''squeezes'' at the edges if i try to push it out the horizontal edges.
and, trace disappear at about 2 divs before right edge (even at x-y when i should see only dot)
what would be best way to start further troubleshooting?
edit: forgot to add manual:
https://onedrive.live.com/view.aspx?resid=477358247C3BC88D!229&app=WordPdf
edit2:wrong resistor number....sorry
previously, i made an error by repairing many scopes in same thread, but now, as fellow member pointed out, different scopes=different thread. Sorry for previous confusion folks!. but now for this issue:
The faulty part, at least one of them, is located at y-amp section (vertical), and it's on ''positive'' portion of mirrored section. Burned component, is r95 in schematic (page 27, on REAL pdf page numbering, 25 on scanned manual). resistor is rated 100 ohms
now, if i just replace resistor, it probadly just burn out again, as something is the reason why it burned out.
obserwations from front panel settings: x-y setting doesn't work, do dot beam, beam slides from left to center, about 2 div high. volts/div knob doesn't do a thing at signal.
outside of x-y setting, volts/div still won't affect, but time/div knob does work.
position knobs won't work either well, at either state. beam ''squeezes'' at the edges if i try to push it out the horizontal edges.
and, trace disappear at about 2 divs before right edge (even at x-y when i should see only dot)
what would be best way to start further troubleshooting?
edit: forgot to add manual:
https://onedrive.live.com/view.aspx?resid=477358247C3BC88D!229&app=WordPdf
edit2:wrong resistor number....sorry
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