1975 RCA XL100 model CU 680 W trips reset button when turned on

[JohnCT]

Originally Posted by Rog Beltmann

If power supply checks ok don't overlook the trace/retrace SCRs

And if you find a shorted SCR, carefully check the reactance transformer connections on the back side of the board or cracks in the board traces from mishandling. I remember we had one brand new out of the box that had a cracked sweep board.

Also, the sockets themselves could get iffy after many years and hours. Flush them thoroughly with a circuit board cleaner and re-pinch the pins with a sharp awl.



John

[pac.attack76]

If it is cracked, then what? I doubt there's a replacement after this long 😔

[DavGoodlin]

Originally Posted by pac.attack76

If it is cracked, then what? I doubt there's a replacement after this long 😔

Cracks in PWB's I have fixed with super glue, solder-bridge the board traces using 18-20 ga/ solid copper wire. While these were pretty good when new, they always responded well to simply cleaning module sockets and controls, looking for solder issues usually turned up a few broken joints under heavy parts like pincushion transformers, etc.

I have modules for this XL-100 series. I scrapped a few back in the day but only with good cause like a broken CRT. Moyer's Electronics still has a surprising number of RCA parts too.

[pac.attack76]

Awesome, I'll keep in mind.

[Jeffhs]

Originally Posted by pac.attack76

Restoration begun on this set. I've managed to get the entire outside done. Now if I can ever get inside and begin with repairs.

Good luck. I hope you get that TV working as normal, as they were good sets and make excellent pictures when they are working as they should. Get yours working as normal and you will have one excellent TV; they don't make 'em like that anymore. When I was in high school 48 years ago (!), I was on the AV crew. Our closed-circuit TV setup had one RCA color monitor, 21-inch if I recall correctly, with the new RCA logo, not the old round one (for our school's CCTV system, we had Sony VTRs and modulators on channels 2, 4, 6 and 7, between locals 3, 5 and 8. We used old Sony 5-inch b&w TVs as monitors for two channels (4 and 6), with a 19" Zenith b&w for channel 2; channel 7 was our one and only color channel, which we began using in my senior year. Don't know what's in use there today; probably flat screens.

Ah, yes, those were the days.

[pac.attack76]

Originally Posted by Jeffhs

Good luck. I hope you get that TV working as normal, as they were good sets and make excellent pictures when they are working as they should. Get yours working as normal and you will have one excellent TV; they don't make 'em like that anymore. When I was in high school, I was on the AV crew. Our video setup had one RCA color monitor, 21-inch if I recall correctly, with the new RCA logo, not the old round one (for our school's CCTV system, we had Sony VTRs and modulators on channels 2, 4, 6 and 7, between locals 3,5 and 8; channel 7 was our one and only color channel, which we began using in my senior year).

Awesome. Ill do my best. I want to use it with my rca selectavision units and ced discs when done.