CANON - canon t90 spt

Comprehensive service manual for the Canon T90 35mm SLR camera, a landmark professional model from the 1980s. This technical repair guide delivers the detailed maintenance and troubleshooting procedures needed to service this complex camera system. Extensive exploded view diagrams reveal complete disassembly sequences for the camera body, shutter mechanism, mirror box assembly, and all major subsystems, providing clear visual reference throughout the repair process. Adjustment sections cover the critical calibrations that define this camera's performance: shutter speed accuracy at 1/4000th second, exposure metering circuits, focusing screen positioning, aperture control, and exposure compensation settings. Detailed electrical schematics map the power supply circuits, flex cable routing and interconnections, motor drive circuits for film advance, shutter charge, and film wind functions, plus the control logic systems that govern camera operation. Switch locations and functions are documented throughout, with integrated circuit pin configurations, test point voltages, and operational specifications provided for systematic diagnosis. Troubleshooting sections address the practical issues technicians encounter: battery supply problems, film transport failures, shutter release malfunctions, DC/DC converter faults, motor operation defects, and optical system alignment. The complete parts list with Canon reference numbers allows precise identification and sourcing of replacement components. An essential workshop resource for technicians specializing in professional SLR repair and maintenance.