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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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7th Jun 2016, 12:04 am | #21 |
Hexode
Join Date: Mar 2012
Location: Liverpool, Merseyside, UK.
Posts: 453
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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. |
7th Jun 2016, 12:26 am | #22 |
Heptode
Join Date: Jan 2008
Location: Oslo, Norway.
Posts: 632
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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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7th Jun 2016, 10:34 am | #23 |
Retired Dormant Member
Join Date: Oct 2014
Location: London, UK.
Posts: 324
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Re: Beovision 7102 CRT TV,schematic/advice please
hi Hans,yes checked for dry joints already
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7th Jun 2016, 11:58 am | #24 |
Hexode
Join Date: Mar 2012
Location: Liverpool, Merseyside, UK.
Posts: 453
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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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8th Jun 2016, 10:33 am | #25 |
Retired Dormant Member
Join Date: Oct 2014
Location: London, UK.
Posts: 324
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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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8th Jun 2016, 3:04 pm | #26 |
Hexode
Join Date: Mar 2012
Location: Liverpool, Merseyside, UK.
Posts: 453
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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. |
8th Jun 2016, 3:40 pm | #27 |
Retired Dormant Member
Join Date: Oct 2014
Location: London, UK.
Posts: 324
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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 |