Marantz AV8003 Service Manual AV Pre Tuner This Marantz AV8003 /F B/K1B/N1B/U1B covers the following topics: technical specifications, technical description, service mode, system error, dual backup memory, update firmware, wiring diagram, block diagram, schematic diagram, parts location, exploded view and parts list, microprocessor and ic data, electrical parts list, about replace the microprocessor with a new one