Quote:
Originally Posted by dtvmcdonald
At some point of frustration it pays to replace every cap and resistor (and diode if any) in a sync circuit,and do it carefully, undoing every lead completely and
resoldering with all new solder. And at least check each coil as best you can.
I fixed a flaky horizontal sync in my CT-100 and the similar circuit in an older
RCA set by doing that. And yes, its perfectly OK, in sync circuits (not RF oscillators!) to replace mica with NP0 ceramic. Its also perfectly OK to attach leads to surface mount caps (less so resistors, as they depend on the board for heat sink) and use them.
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problem is, the schematic has proven to be unreliable, at least for the sync area, bandersen has IDed that cap as 82pf, i have no reason to doubt him,and if so, then 75-561R10TCCQ82 is the mouser part to use.
the 100pf will have to be unhooked to be read, as its at an angle, and the dots can't be seen yet.
And yes, the resistors are easy enough to change, I have tons of metal film ones, most of the ones in there seem OK, but I'm starting not to trust them.
And again I don't really understand how to decode the dots on the mica caps, so I will most likely post pics of them. :/