Actually it's fairly easy to rebuild if you have the parts but.. If it is new enough the factory will do it.
When my PD-9180 (Converter) died at 12.5 years old I was about to leave from the Flint MI area (Davison) For South Carolina for the winter. So I picked up a nice and very handy battery charger (Deltran Battery tender Delux puts out 2,20 or 70 amps depending on mode and will auto switch from 20-2 amp "Tender" mode and in tender mode it works just like the smaller units)
Used it for a day and a half. and on Halloween Morn was parked at the T/A Truck stop in Tekonsha MI.. Pulled the converter (In a light snow) and off to Marshall.. Walked in the parts/service door and was ask "Can I help you" Pointed to the unit and said DEAD. told to go through a 2nd set of doors, Again ask "Can I help you" Same response. "put it on my desk"
$236 later I walked out with a factory rebuilt back to Tekonsha. Installed (partially did not bolt it down) and off to SC.
Factory address is on "Industrial" but the factory is on the corner of Industrial and the main drag from Tekonsha to Marshall. If you get to the round about you went too far.
Home was where I park it. but alas the.
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times