Scanner controller board
The scanner controller board controls the operation of flatbed and ADF components used in the following scanning processes: document transportation, document exposure, and imaging. When the copy processor board sends the scan commands to the scanner controller board, the scanner controller board sends signals to the motors, solenoids, scanning lamp, and CCD driver PCB.
The scanner controller board controls the operation of the following components:
●ADF document transportation
•ADF sensors
•ADF solenoid
•ADF drive motor
●document exposure
•
•scanning lamp
•scanning motor
●imaging process
•CCD driver PCB (converts reflected light to a digital RGB signal)
•copy processor communication
●flatbed intake fan (off in PowerSave mode,
| ADF motor circuit |
| The ADF motor circuit controls the operation of the ADF motor. The ADF motor is a +24 vdc |
| stepping motor. It rotates in a counterclockwise direction. The ADF motor is not |
|
|
Note | When a |
| ADF motor circuit is not fault protected. No error message appears on the |
| if this circuit fails. |
|
|
|
|
| The optical unit motor circuit controls the optical unit motor and the movement of the unit. The |
| optical unit motor is a +24 vdc stepping motor. It rotates in both a clockwise and |
| counterclockwise direction. If the optical unit motor fails, the message 30.1.17 SCAN FAILURE |
| appears on the |
|
|
| The fan motor circuit controls the fan speed. The fan is off in PowerSave mode, it rotates at half- |
| speed when the product is idle, and at |
| is detected in the ADF, or when a |
| message 30.01.06 Scan Failure appears on the control |
5 Theory of operation 61 |