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-   -   Beovision 7102 CRT TV,schematic/advice please (https://www.vintage-radio.net/forum/showthread.php?t=126284)

Clydeuk 6th Jun 2016 11:04 pm

Re: Beovision 7102 CRT TV,schematic/advice please
 
You shouldn't have any convergence issues with a 30AX. I'm sure I used to swap yokes around on these back in the day without encountering any problems.

I always found converging a delta gun CRT quite therapeutic and a real challenge to get it as best it could be. You really need to know when to stop though.

hans 6th Jun 2016 11:26 pm

Re: Beovision 7102 CRT TV,schematic/advice please
 
Didn't these tubes have a potmeter on a small print on the scan coils? I remember having trouble With dry joints on this print.

zens.tv 7th Jun 2016 9:34 am

Re: Beovision 7102 CRT TV,schematic/advice please
 
hi Hans,yes checked for dry joints already

Clydeuk 7th Jun 2016 10:58 am

Re: Beovision 7102 CRT TV,schematic/advice please
 
When you say the scan coils are smoking, are you getting a picture still?

zens.tv 8th Jun 2016 9:33 am

Re: Beovision 7102 CRT TV,schematic/advice please
 
no,managed to see picture just before it failed,and seemed to collapse into a vertical line down the center of screen,whilst coils smoking ,then no picture at all

Clydeuk 8th Jun 2016 2:04 pm

Re: Beovision 7102 CRT TV,schematic/advice please
 
Remove the scan coils and have a close look at the winding. See if you can see any evidence of burning. I can't remember if you can see the winding when the yoke is removed, can you believe that when I must have worked on hundreds of sets with this CRT.

It seems strange that the coils would just fail after fixing the original fault.

zens.tv 8th Jun 2016 2:40 pm

Re: Beovision 7102 CRT TV,schematic/advice please
 
will do cheers

used to work on many CRT sets myself.

only seen a few in the past 8 years and struggling to remember my theory


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