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4hv.org :: Forums :: General Science and Electronics
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damaged oscilloscope

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kimbomba
Mon Oct 03 2011, 02:54AM Print
kimbomba Registered Member #3854 Joined: Fri Apr 29 2011, 03:45AM
Location: Mexico
Posts: 95
This oscilloscope is not functioning properly, the display shows what you see in the photo. Any idea of what can be the cause, can it be repaired? the owner wants $30. thanks in advance.

1317610455 3854 FT0 Scope
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radiotech
Mon Oct 03 2011, 07:17AM
radiotech Registered Member #2463 Joined: Wed Nov 11 2009, 03:49AM
Location:
Posts: 1546
It appears that something in the horizontal stage is limiting the deflection.Put the scope into X-Y
mode with no inputs attached, try and move the dot around the screen with the vertical and
horizontal position controls. This may be a transistor problem.



The scope is fairly limited in usage, it has only 15 Mhz. I found it in a 1975 HP catalog here.
Parts may be an issue. The scope was made for TV repair use, among other things.
It seems a lot of money for 35 year old non functional scope. However, it may be
a simple problem.

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AndrewM
Mon Oct 03 2011, 06:12PM
AndrewM Registered Member #49 Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
The price isn't very good, IMO.

I bought a Tektronics 468 scope (100MHz analog w/ a 10MHz DSO module) with some dried PSU caps for $50.
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