More thoughts/observations...
It's a given that the logic board needs recapping, however...
...Upon further inspection, I suspect that the power supply area of the analog board needs a recap job as well. The symptoms seem to fit with a lack of voltage, which is most probably caused by a bad capacitor or two (or three? or four?) somewhere in the power supply. I suspect that the CRT-driving area is okay because I get a relatively good, overall undistorted picture, with good vertical/horizontal action, although it is a bit on the dim side and slightly shrunken (which makes sense if there's not enough voltage, which wouldn't necessarily be caused by anything in the CRT-driving circuits).
I want to be strategic about this; I want to keep parts orders to a minimum for now by doing a minimal recap. Does anybody know which capacitors (and of what values) are most likely to cause this problem so I can replace just those?
Thank you,
c
It's a given that the logic board needs recapping, however...
...Upon further inspection, I suspect that the power supply area of the analog board needs a recap job as well. The symptoms seem to fit with a lack of voltage, which is most probably caused by a bad capacitor or two (or three? or four?) somewhere in the power supply. I suspect that the CRT-driving area is okay because I get a relatively good, overall undistorted picture, with good vertical/horizontal action, although it is a bit on the dim side and slightly shrunken (which makes sense if there's not enough voltage, which wouldn't necessarily be caused by anything in the CRT-driving circuits).
I want to be strategic about this; I want to keep parts orders to a minimum for now by doing a minimal recap. Does anybody know which capacitors (and of what values) are most likely to cause this problem so I can replace just those?
Thank you,
c