Toshiba e-studio550 Service Manual page 84

6. SCANNING SECTION
6. 1. Function
6. 2. Construction
6. 3. Operation
6. 3. 1. Scanner motor
6. 3. 2. Two-phase motor drive circuit (fixed-current type)
6. 4. Control for Exposure Lamp
6. 4. 1. General description
6. 4. 2. Exposure lamp
6. 4. 3. Control circuit for exposure lamp
6. 5. CCD control
6. 5. 1. Opto-electronic conversion
6. 5. 2. Shading correction
6. 6. Automatic Original Size Detection Circuit
6. 6. 1. Principle of original size detection
6. 6. 2. Process of original size detection
6. 7. Disassembly and Replacement