MAMIYA - Mamiya M645 Super AE Prism TechBulletin
by MAMIYAComprehensive technical documentation for the Mamiya M645 Super, focusing on circuit board improvements and modifications. This collection assembles multiple service bulletins issued during 1987 production to address specific operational issues encountered in the field. The document opens with a detailed wiring diagram of the electronic system (section 3), followed by two improvement bulletins numbered 052 and 049. Bulletin 052 (October 1987) documents a phenomenon where the AE mirror remains in the upper position when attaching or removing the prism finder, requiring transistor replacement (Q1 and Q2) and substitution of resistors R8 and R11 with jumper pins. Bulletin 049 (July 1987) addresses unintended illumination of the LED "OVER" display, attributed to static electricity damage to integrated circuit IC3, resolved through the addition of protective diodes (D2-D5), a resistor (R37), and a capacitor (C13). Each modification is accompanied by annotated circuit board schematics clearly marking component locations and applicable part numbers, providing technicians with precise guidance for performing the necessary upgrades.
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Document Details
- Format
- Pages
- 6
- Size
- 3.3 MB
- Category
- Photography