Accuphase P-300L Power Amp Repair III - Parts Replacement

This is one of the challenging repair work I have encountered. Because there is no access of wiring and circuit diagram, I have to use the labels marked on the parts and the traces at underside of PCB to figure out a circuit schematic for the repair use. So far, I am happy with the result of the work and hope all the DIY fans enjoy watching the video as well. I welcome all the comments and questions regarding to this repair. (Please note - the schematic in this video is still under verification, no accuracy guarantee)

[@brucetungsten5714]

Beautiful amp and very nice repair. Great to see it being taken care of in a professional manner.

[@hdgboy]

As usual a fine job at troubleshooting and repair. Always a great soundtrack too. Thanks

[@alexzildjian]

Thanks for the vídeo 😃🙏

[@SamB-fv6su]

Very nice 👍🏾

[@dulemml]

Well done.hard work.

[@tottimejdi5820]

you can compare right and left channel on oscillo to see if there is a diffrence

[@brunohui846]

Great work, I like to know the transistor have to match pair before replace or not

[@VintageAudioFan]

Yes, it will ensure the amplifier working properly.

[@Zazpi_Zezenak]

Well done for this great repair ! Don’t you want to change the same components on the left channel to keep it balanced?

[@VintageAudioFan]

Thank you for the suggestion. It will be the project in the future (I already bought enough parts for both channels). My short term goal is trying to make this P-300L back to life again.

[@saurabhshresth6996]

Any chance you could post the list of parts that you used? Thank you

[@VintageAudioFan]

Please email me for your request.