I'm repairnig another ancient Aiwa AD6900 cassette unit.
It would make access to the deck much easier if I could remove the 3 sockets
that protrude
through the front plate. These are locked into the subchassis , the barrel
(that the plug passes through)
pokes through holes in a steel plate and then stout plastic rings pushed
over
the barrels to lock in place. Hot air gun to soften the plastic to remove ?
Any attempt to prize off these barrels would be obvious as they protrude out
the front plate.

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Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/