Canon EOS 50 E - Page 5

Part 2. Technical Information
1.TECHNICAL DESCRIPTION (OPTO-MECHANICAL) ......... 2-1
1 .1 Eye-controlled Autofocus . . . . . . . . . . . . . . . . . . . . . . . . .2-1
1.2 Autofocus System . . . . . . . . . . . .................... 2-5
1.3 Exposure Control System . . . . . . . ................... 2-9
1.4 Film Transport ................................... 2-13
1.5 Built-in Flash .................................... 2-16
1.6 E-TTL Flash System .............................. 2-17
2. CIRCUIT EXPLANATIONS ............................ 2-26
2.1 Overall Operation ................................ 2-26
2.2 Electronic Circuitry and Power Supply ................ 2-29
2.3 Power Distribution ............................... 2-32
2.4 Battery Installation ................................ 2-33
2.5 Battery Check ................................... 2-34
2.6 Autoloading .................................... 2-35
2.7 Light Metering ................................... 2-36
2.8 Autofocus Ranging ............................... 2-37
2.9 Shutter Release ................................. 2-38
2.10 Built-in Flash ................................... 2-39
2.11 FP Sync (with Speedlite 380 EX) ................... 2-40
2.12 Film Winding ................................... 2-41
2.13 Film Rewinding ................................ · .2-41
3. SWITCH NOMENCLATURE AND FUNCTION ............ 2-42
4. IC PIN DESCRIPTIONS .............................. 2-43
Part 3. Repair Information ___________ _
1. REPAIR PREPARATIONS ............................. 3-1
1 .1 Bleed the Main Capacitor ........................... 3-1
1.2 Operations with Top Cover Removed .................. 3-1
1.3 Current Consumption .............................. 3-2
1 .4 Tools and Expendables ............................ 3-3
1.5 Locally Fabricated Tools ............................ 3-4
2. ASSEMBLY AND DISASSEMBLY ....................... 3-8
2.1 External Cover Removal ........................... 3-8
2.2 Mirror Box Unit Removal ........................... 3-10
2.3 Main Flex Unit Removal ........................... 3-14
2.4 Mirror Box Disassembly-1 .......................... 3-18
2.5 Mirror Box Disassembly-2 .......................... 3-20
2.6 Body Disassembly-1 .............................. 3-22
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