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Old 4th Aug 2022, 10:07 am   #1
19Seventy7
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Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,306
Default Thorn 3000 - flywheel test point

Hi all

I’ve been asked to work on a couple of old sets at work to see if I can get them working, a Thorn 1500 and 3000. The Thorn 1500 has a dead IF stage, looking like VT7 is faulty, but I digress

I’ve managed to get the 3000 up and running, it took very little work, someone has been here before in the 80s and the PSU was overhauled - thankfully!

I’m now faced with a very fast line oscillator. I’ve read that to adjust the coil you need to short the “flywheel test point” to chassis, easy enough, if only I knew where the test point was! So here comes the daft question - where is it?!

I’ve had a look on a trader sheet but I can see no mention of the actual point nor can I see anything on the circuit diagrams provided.

Thanks
‘77
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