Hi,
just got my HP1980B scope (nice thing...). Worked nicely (incl. readout) for like 1 minute, then there was a click noise and the readout display is compressed horizontally to a very narrow line. Now the good thing: The processor and its periphery is fine, the scope works just as it should and the menus also work, just i cant see much of them. Readout vertical deflection also is fine. Normal horizontal deflection is fine (traces didplay nicely) so the horizontal deflection hybrids (which are impossible to get without a whole scope around them) probably are good. Also, i didnt pay too much for it.
The bad things: Readout horizontal deflection doesnt. And if one scope really should have this working, its the 1980.Living without this might work on a 7000series but not on that scope, esp since navigating the menus without seeing them is bad. Also, its HP, so most part numbers are HP numbers. And, its a 1980B.Thats a surprisingly small case stuffed with 20kg of electronics.Probably the analog scope with the most PCB area and largest part count too. Also i dont have a service manual (which would be darn incredibly useful if i would know where the signal goes so i could look where it stops...) and i could not locate any place that sells it (i have the operating/programming manual).
Id have most of the equipment i would need for troubleshooting, that is a tek TAS250 50Mhz analog scope, a slow storage scope, several meters (including high-precision ones) and of course a soldering iron. Just no service manual or schematics of the HP, which is bad.
Now does anyone have a idea what could be bad and what to do about? Also, where to get a schematic/service manual?