Repairing Kenwood XR900-5 car audio amp. Can't identify missing part

[mitsu2k]

Hello folks, I am trying to repair this Kenwood XR900-5 power amp. Someone else had previously worked on this amp and tore off a transistor (Q982, pad and all) and I cannot identify what it was without a schematic or service manual. The one near it is an 2SCR533 NPN. I am wondering if the missing one is likely to be the same or a PNP? Can anyone make a good guess based on the photo?

[redwire]

Looks like the identical circuit for Q981, Q982 2SCR533D possibly a self-resonant DC-DC converter or Royer as a wild guess.
You would have to follow the collector/emitter circuit, I'm expecting a transformer somewhere.
Confirm polarity on D982, D981 is the same, I think D981-K should not go to the base? Can't quite see in the pic.
If this is a power mosfet driver circuit, it's weird the emitters appear to not go to GND.

[mitsu2k]

Looks like the identical circuit for Q981, Q982 2SCR533D possibly a self-resonant DC-DC converter or Royer as a wild guess.
You would have to follow the collector/emitter circuit, I'm expecting a transformer somewhere.
Confirm polarity on D982, D981 is the same, I think D981-K should not go to the base? Can't quite see in the pic.
If this is a power mosfet driver circuit, it's weird the emitters appear to not go to GND.

Hello redwire, yes there are transformers. The polarity of D981 and D982 seem to be opposite but both do go directly to the base of the Q981 and Q982. Would this indicate that Q982 would possibly be PNP? Please see photos.

"I think D981-K should not go to the base?" Do you mean the Cathode of D981 should not go to the base of Q981? It does.
For D982, the Anode goes to the base of Q982



btw, I found D982 to be shorted so temporarily wired this 10v zener in.

[redwire]

The circuit looks like it could be a driver stage for the bank of power mosfets? Can you trace it out a bit.