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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 6th Jun 2016, 11:04 pm   #21
Clydeuk
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Default 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.
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Old 6th Jun 2016, 11:26 pm   #22
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Default 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.
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Old 7th Jun 2016, 9:34 am   #23
zens.tv
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Default Re: Beovision 7102 CRT TV,schematic/advice please

hi Hans,yes checked for dry joints already
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Old 7th Jun 2016, 10:58 am   #24
Clydeuk
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Default Re: Beovision 7102 CRT TV,schematic/advice please

When you say the scan coils are smoking, are you getting a picture still?
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Old 8th Jun 2016, 9:33 am   #25
zens.tv
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Default 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
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Old 8th Jun 2016, 2:04 pm   #26
Clydeuk
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Default 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.
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Old 8th Jun 2016, 2:40 pm   #27
zens.tv
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Default 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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