Fender M-80 single 12" Schematic needed please

[jojokeo]

Hello,


I can't seem to come up with the Fender M-80 schematic. It's the single 12" combo model. On the back of the chassis there's a barcode that reads "Fender 22-5900 M80 Combo Guitar Amp". I have had it apart already but something is amiss with the Presence control. It is not designed using the OT secondary and feedback rather appears to be sort of a pseudo part of the preamp and/or leading to the Vol/Tone Controls?! Any help would be appreciated. Thanks in advance - Keo


ps - I've already soldered all apparent bad contacts, pot appears to be okay, etc...

[mresistor]

Is this it?    https://elektrotanya.com/fender_m80_chorus_sch.pdf/download.html

[jojokeo]

Technically no, but I think it’s as close as I’m going to get? I was hoping to find an actual schematic (no chorus) before going in again. There’s a lot to take apart to get to the underside of the board. I guess I’ll re-check the traces all near once again, but without the schematic I have to guess which transistor or opamp is in play… (I hate guessing and hoping when repairing).
Thank you for the link!