54 Theory of operation C9148-90909
General descriptions
This section describes the individual MFP components and their roles in the scanning process.
Figure
18 illustrates the relationship between the MFP components. Figure 19 illustrates the
flatbed-assembly component locations. Figure 20 illustrates the ADF-unit component locations.
The following components are identified:
The block diagram below illustrates the relationship among the MFP components.
Figure 18. MFP block diagram
● scanner controller board
• CPU
• fan-motor drive circuit
• ADF drive motor circuit
• optical-unit motor circuit
• optical-unit home-position
sensor (PI1201)
● optical unit
• scanner motor
• inverter PCB
• scanning lamp
• CCD driver PCB
● power supply
● flatbed intake fan
● intermediate PCB
● ADF cover-open sensor
(PS10)
● ADF unit
• document-detect sensor
(PS2)
• document leading-edge
sensor (PS1)
• ADF drive motor
• pickup solenoid
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