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

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Old 15th Aug 2023, 1:51 pm   #1
CRavens
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Join Date: Aug 2023
Location: Lisbon, Portugal.
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Default Thomson TTV 3575 P - Betacam SP - VU meter doesn't turn on

Hello,

Everything in this deck is working perfectly, except the VU meter that doesn't turn on. What could go wrong? I have a functional VU meter on a BVW 65 P, I could potentially use some donor parts, not the led meter though, looks slightly different probably because of the recorder/player difference in the decks audio monitoring, any suggestions? Thanks.

PS: The audio works and the level knobs too.
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Old 16th Aug 2023, 3:31 pm   #2
John123
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Default Re: Thomson TTV 3575 P - Betacam SP - VU meter doesn't turn on

Assuming this uses a VFD, check the low-voltage AC heater supply (e.g +5V). If present, check the anode supply which is usually a high negative supply (e.g. -30v) normally fed to the display directly from the PSU, or in some cases, generated 'locally' by a DC-DC boost converter.

Check PSU health in general (caps, etc). And of course, those all-important fuses..
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John
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Old 20th Aug 2023, 8:37 pm   #3
CRavens
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Join Date: Aug 2023
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Default Re: Thomson TTV 3575 P - Betacam SP - VU meter doesn't turn on

I think I will try to swap boards first in that area and see what happens, thanks!
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