kortek 1420a vertical transistors

pinnut

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on a kortek 1420a, i removed the cage around the flyback. i notice the screws mounting the 2 vertical output transistors have an insulating grommet that goes in the hole in the cage. however, there is no mica or any other insulator on the back of the transistors, just paste.
should they be insulated with mica or film, or was the paste the insulator?

thanks
 
depends if the transistor case is fully insulated. if its fully insulated than no mica is required.
 
they are insulated

looking at the schematic, they are insulated. i found the insulators on the board. i has assumed they would be stuck on the paste, but they fell right off without me ever seeing it. i was going to delete the post cause its kind of embarrassing, but it might help someone else

thanks
 
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