Another KCS47 Restore...No High Voltage/B+ Down 25V

[Kevin Kuehn]

Hey Chris,

Did you get your transformer wiring issues squared away OK? For your information, even after having several video IF alignments under my own belt, it's not exactly something I look forward to, not just for the sake of saying I've done it. It's one of those things that demands so much time and concentration, that it often seems like a nasty job. Then after seeing how little improvement it often results in, I'm for the most part content to leave well enough alone. But you do have to make an informed judgment call dependent on how the set performs. I often end up simply touching up the sound IF alignment so it's aligned with best picture tuning. And lately I've even gotten lazy with this and aligned the sound to the 4.5mhz carrier of my VHS/DVD combo player which has an RF modulator built in. So with the DVD player I can pause the video and the muted audio sound carrier is still present to align to using a scope or high impedance meter similar to what Sams alignment instructions typically call for. Funny thing is I seldom watch the TV's once they get taken off my work bench, so not much motivating for me to begrudgingly go through the entire video IF alignment. On the other hand from an educational perspective it makes perfect sense to do a few so you understand what is all involved, and of course it ultimately gives you a better understanding of how the circuits in the TV all work together. But it's definitely something you need to approach with caution, and most likely after you gain a better understanding of why and how its done.

[Chris K]

Originally Posted by Kevin Kuehn

Hey Chris,

Did you get your transformer wiring issues squared away OK? For your information, even after having several video IF alignments under my own belt, it's not exactly something I look forward to, not just for the sake of saying I've done it. It's one of those things that demands so much time and concentration, that it often seems like a nasty job. Then after seeing how little improvement it often results in, I'm for the most part content to leave well enough alone. But you do have to make an informed judgment call dependent on how the set performs. I often end up simply touching up the sound IF alignment so it's aligned with best picture tuning. And lately I've even gotten lazy with this and aligned the sound to the 4.5mhz carrier of my VHS/DVD combo player which has an RF modulator built in. So with the DVD player I can pause the video and the muted audio sound carrier is still present to align to using a scope or high impedance meter similar to what Sams alignment instructions typically call for. Funny thing is I seldom watch the TV's once they get taken off my work bench, so not much motivating for me to begrudgingly go through the entire video IF alignment. On the other hand from an educational perspective it makes perfect sense to do a few so you understand what is all involved, and of course it ultimately gives you a better understanding of how the circuits in the TV all work together. But it's definitely something you need to approach with caution, and most likely after you gain a better understanding of why and how its done.

Hey Kevin...the transformer is reinstalled in the TV and about half the wiring is connected up. I had to rotate the transformer 180 degrees and I still needed to cut part of the chassis out to accommodate the thicker wires. I am going to align the trap infested RCA after this and one more project on my bench...an Aja 5842 German radio that's pretty rare and has no documentation online anywhere. I have a Grundig Super Majestic that I restored several years ago and the AJA is a similar form factor (Aren't all of these 1950-1960s West Germany made radios?!)

[Kevin Kuehn]

Not sure I understand why the transformer was rotated. I avoid most German radios because of some unusual parts that are difficult to replace. Fragile PC boards, terminal strips, and plastic components. And those band switching contacts and mechanisms seem problematic. That said my folks owned a couple Grundig receivers and those did have a very nice sound back in the day.