This comprehensive service manual provides detailed instructions and diagrams for repairing the Toshiba e-STUDIO 281c, e-STUDIO 351c, and e-STUDIO 451c copiers. The manual covers a wide range of topics, including specifications, accessories, options, supplies, and a system list. It also offers a sectional view, an electric parts layout, symbols and functions of various components, and a general description of the copier's system block diagram, board construction, cover disassembly and replacement, PC board and HDD removal and installation, and option removal and installation.

The manual delves into the copier's copy process, explaining color expression, the four-step copy process, the general description of the process, detailed process descriptions, and a list of copying process conditions. It then examines general operation, including an overview, descriptions of warming-up, ready state, drawer feed copying, bypass feed copying, interruption copying, abnormality detection, and flow charts.

The manual explores the copier's control panel, providing a general description, details on the display panel items, the relationship between equipment state and operator operation, a description of the dot matrix LCD and LED display circuits, and disassembly and replacement procedures.

The manual also includes sections on the copier's scanner, image processing, laser optical unit, drive system, paper feeding system, drum-related section, developer unit, revolver unit, transfer unit, image quality control, fuser unit and paper exit section, automatic duplexing unit, power supply unit, and PC boards.

The service handbook complements the service manual by offering additional information on error codes, self-diagnostic modes, adjustments, preventive maintenance, troubleshooting, firmware updating, power supply unit, remote service, data cloning, and wire harness connection diagrams.

Finally, the parts list provides a comprehensive inventory of the copier's components, including parts for the cover, control panel, base frame, front frame, rear frame, power supply, system case, logic case, laser optical unit, optical frame, transfer unit, drum drive, developer drive, feed drive, optical drive, feeder, bypass, bypass feeder, aligning unit, platen, cleaning unit, charger, transport belt, belt cleaning unit, developer unit, revolver unit, toner, fuser, automatic duplexing unit, drawer, and PC boards. It also includes a list of jigs, grease, download jigs, supplies, replacement units, and PM kits.