Home › Forums › Product Discussion & Questions › BeoVision › US Beovision Avant 8490 – no sync
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RallyMK1.
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24 July 2026 at 21:27 #124653
RallyMK1
BRONZE MemberHi everyone.
I’m working on a Beovision Avant 8490, US version, that was blowing fuses as soon as it was plugged in.
I’ve traced down the failed voltage regulator, and after replacing it I’ve got power to the tube and the beginning of an image on the screen, but no sync. I’m trying to find the correct service manual for this model, so I can trace the source of the sync, but the ones for earlier, or UK models, are different enough that PCB 2 does not match up with what I have.
If anyone has any info, or a source on this service manual, I’d appreciate it very much.Attachments:
You must be logged in to view attached files.24 July 2026 at 22:57 #124657RallyMK1
BRONZE MemberI have found a service manual that’s much closer to what I’m working on.
https://elektrotanya.com/bang_olufsen_beovision_avant_rf28_rf32_rf_ctv.pdf/download.html#dlAttachments:
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