Check the listing for details. Original Tektronix Service Manual for the 7704A Oscilloscope. Condition: Used. Listed at 40.00 USD. This is an original Tektronix Service manual for the 7704A Oscilloscope, part no. 070-1260-00.The photo is of a representative manual. Manuals were frequently revised, so if you're concerned your instrument version is covered, send a message with the serial number of your instrument before ordering. Instruction manuals include operating and maintenance information, including schematics. Operator's manuals include only operating instructions, but no maintenance information. Service manuals include maintenance information and schematics, but no operating instructions. The Museum ships on Thursdays and Saturdays. vintageTEK is a charitable, educational and scientific museum founded to commemorate the early history of Tektronix, Inc and its role in spawning approximately 300 high technology companies in the 'Silicon Forest' - i.e. the four county, two state metropolitan area of Portland, Oregon. Our main goal is to share our knowledge and history and to pique the interest of young people in science and technology and to challenge them to become the technologists of the next decade.