NIKON - Nikon MB21 service manual

Comprehensive service manual for Nikon's MB-21 High Speed Battery Pack, a specialized power accessory designed for F4 and F4s camera bodies. This technical reference covers all aspects of maintenance and repair procedures for this critical electrical component. The manual provides complete product specifications, including power source options (six AA alkaline-manganese or Ni-Cd batteries with selector switch), dimensional data (168.5 × 138.5 × 76.5 mm), and electrical terminal specifications (five contact points for power, shutter release signals, and battery type identification). The disassembly section delivers detailed step-by-step procedures for both disassembly and reassembly operations, cross-referenced with exploded drawings for accurate guidance. Technical documentation includes comprehensive wiring diagrams, circuit schematics, electric component location maps, and detailed exploded views of each subassembly including the upper plate unit, printed circuit board, and camera body mounting mechanisms. A complete parts list is provided to support component replacement and repair operations. This manual serves as an indispensable resource for camera repair technicians and maintenance specialists working with professional photographic equipment.