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Old 31st Mar 2020, 8:42 pm   #51
Kyle__B
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Join Date: Mar 2020
Location: Nijmegen, Netherlands
Posts: 142
Default Re: New to valves, Dutch Philips TV with 50Hz speaker buzz

Quote:
Originally Posted by Nuvistor View Post
It’s unlikely the valves have killed the LOPTX, it’s more likely if they are faulty they damaged the power supply.
Look carefully for burned resistors in the power supply, you will probably be able to see them.
It’s quite possible that the replacement valves are ok and it’s another fault caused the problem, it happens, just moving the chassis in a vintage TV can break insulation on wires etc.

A careful check for burnt items hopefully will spot what part as burned, then you need to trace out why.

I've looked and nothing is visibly burned, as it is now with the old valves back in the audio section is still working perfectly. The 805s are in horizontal and vert sync and I'm willing to bet they can cause stress. I doubt very much that just unplugging two valves and plugging two new ones in has made a wire come loose because the chassis has been in the same position for weeks.

I'm not touching this tv again for another few days. I need a holiday from it.

Last edited by Kyle__B; 31st Mar 2020 at 8:47 pm.
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