Hello TIM
some days ago an AK member explain why you will not find any SM for Accuphase units :
Big issues. You're dealing with Accuphase and their attitude. Owner's manual you might call them and see if you can buy one or they'll send you one. The Service Manual, the schematics, you won't get from Accuphase. Nor will they sell you spare parts, they expect you to send the unit to them in the country you bought it from or the original owner bought it from for service. Best of luck.
KentTeffeteller
what is the issue in your preamplifier ?