Scanning
D017/D018/D019/D020 6-18 SM
6.4 SCANNING
6.4.1 OVERVIEW
1. Scanner HP sensor 7. Scanner motor
2. ADF exposure glass 8. Sensor board unit (SBU)
3. 2nd scanner (2nd carriage) 9. Lens Block
4. Scanner lamp 10. Original length sensor
5. 1st scanner (1st carriage) 11. Original width sensor
6. Exposure glass
The original on the exposure glass or ARDF exposure glass reflects the light emitted from
the scanner lamp. The reflected light goes to the CCD on the sensor board by way of the
1st and 2nd scanners. The sensor board converts the CCD analog signals into digital
signals.
When the original is manually placed on the exposure glass, the scanner motor pulls the
1st and 2nd scanners via mechanical linkage. The original is scanned from left to right.
When the original is fed from the optional ARDF, it is automatically transported onto the
ARDF exposure glass, and to the original exit. The original does not stay on the glass; but
goes to the exit. The 1st and 2nd scanners stay at their home positions.
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