accuphase e-303x

Hello There!

I ve been evaluating DIY for a while and finally got an opportunity on the famous accuphase E-303X.

cant find any schematics so far , is there someone to help or send some something ?

also I d apreciate to read your review or comments on this amplifier and what tweak / cleaning you d recommend

is there a benefit to go with an extra pre-amp or the integrated one is good enough ?

enjoy the music ;)
bump for an old thread. does anyone have anything like schematics or a service manual for this guy? even just biasing information. they seem to keep these things on lockdown, so you'd probably have to be an old Accuphase repair tech or know somebody who is/was to be able to help out...

thanks just in case!