I got this set, friend wants it fixed.
He said the power button is messed up, and it doesnt turn on. well, I seen that it was a ctc187, I know thats not the case. I got the set, and pressed the button, it presses fine. I immidiately thought in my head, since I worked on these before, the 10uf cap in the SMPS primary is gone, fuse is gone, and STK is wasted. thats what I first thought.
I took it apart, only to confirm my suspician, the fuse is wasted.
I pulled it out, here is the rundown so far: caps look normal, no bloated or exploaded caps like on most of the ones I worked on.
The fuse is gone, the HOT is shorted, and 1 of the 2 secondary diodes is shorted. The one that feeds the flyback and associated circuits is shorted.
Ok, question. What caused the HOT to blow in the first place? flyback possibly bad?
I got another board identical to it, that had a bad STK, and all the power supply caps. Everything was recapped, but the woman said she tossed it, and didnt want it fixed, so I never got the STK, and ended up robbing the caps and the NTSC processor for another set. The HOT and associated circuits are still OK.
I wonder if I should just pull the flyback and HOT, with the diodes, and some blue pincussion caps and change them out?
any thoughts would be appriciated.