05-16-2017, 09:34 PM
OK. Came after 9pm home from grappling class, decided I had just enough energy left to attempt the repair.
The culprit. 2N2222A transistor.
The sub. MMBT2222A, SOT23 with leads soldered, inserted in the socket.
The channel lines, chopped.
The channels showing the test meander signal from the scope front panel itself.
Ideally, Terry, if you have a 2N2222A, you could put it in, though I think this one is just fine. SOT23 dissipates half of what TO-18 can, but then I do not think there is much dissipation here.
About 1.5hr for the whole thing. Not bad. I never fixed a scope before.
The culprit. 2N2222A transistor.
The sub. MMBT2222A, SOT23 with leads soldered, inserted in the socket.
The channel lines, chopped.
The channels showing the test meander signal from the scope front panel itself.
Ideally, Terry, if you have a 2N2222A, you could put it in, though I think this one is just fine. SOT23 dissipates half of what TO-18 can, but then I do not think there is much dissipation here.
About 1.5hr for the whole thing. Not bad. I never fixed a scope before.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
