Check the listing for details. AMPEX AX-50 Operation Manual and free bonus Maintainance Manual. Listed at 20.00 USD. You are purchasing a COMPLETE COPY of the AMPEX AX-50 Operation manual. This manual will tell you everything you need to know about the operation of this vintage tape deck including how to get the sound on sound functions working. The free bonus Maintenance Manual includes several schematic diagrams that detail the circuits of the unit and electrical alignment procedures. Please remember that these are COPIES of the original manuals. There is bleed through from the back side text on several of the pages of the Maintenance Manual (that's why it's a free bonus)- the originals were very old and thin. I did the best I could during the photocopy process but be advised that these are not perfect reproductions. You are bidding only on the Operation manual, the Maintenance Manual is a free bonus There are no returns on this auction.