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Old 08-28-2018, 06:51 PM
flyrihght flyrihght is offline
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Magnavox T989 chassis flyback

I am in search of magnavox flyback #361499. t989 chassis r313 1200 ohm resister opened. replaced with tripler disconnected and no hv. seems like there is drive. be glad to pay shipping on a whole chassis. i may have to get back in there and troubleshoot that d board. any tips?
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File Type: jpg d board drive circuit.jpg (120.0 KB, 18 views)
File Type: jpg output circuit.jpg (125.7 KB, 14 views)
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Old 08-29-2018, 12:31 PM
zeno zeno is offline
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Some of these FBT's plugged in. The connections would toast up.
Also the mother board & module connectors went cold a lot. Dont
forget the frame grounds....
It doesnt show one but this is about the time they switched to
4-lead caps. An open leg will kill the HV.
The SCR is for HVSD. Pull it to eliminate BUT use a variac, you may
have too much HV. Start it at abt 70VAC.
With the tripler input unhooked you should get a healthy 1/2" arc
at the FBT out. These were not FBT eaters. Only ones I changed
were badly burned from the bad connections.

73 Zeno
LFOD !
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Old 08-30-2018, 10:39 PM
flyrihght flyrihght is offline
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thank you

I will check these suggestions and let you know results
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Old 08-31-2018, 10:48 PM
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bgadow bgadow is offline
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I checked the Thordarson number, looks like their part # FLY-462. I didn't see on in my stash.
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