Quote:
Originally Posted by timmy
C59 is 470pf I measured 410pf does ceramic caps go down in value? As for the vertical it does have 640v boost.
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ceramic capacitors rarely ever go bad, and most in the set are 20% values unless otherwise listed, and it's very had to test in circuit unless you have a tester that was specifically made to test capacitors in circuit with leads that compensate, then a simple DVM will always give bad (deviated ) readings, especially with lower value capacitors because the length and position of the leads themselves used will skew the test results.
Notice the leads on this $1200 pro tester.
https://media.digikey.com/Photos/BK%...os/LCR-600.JPG
And yes, and mentioned before the vertical uses the 640v boost in 3 areas.
Vertical Height pot R17, Vertical linearity pot R18 and it also goes to C5 to R109 / C3.
Any problem here, and you would most likely lose sweep.