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B. Basic structure of scanner section
1
Copy lamp (Xenon lamp)
2
Reflector (Converging plate)
3
No. 1 mirror
4
No. 2 mirror
5
No. 3 mirror
6
Lens
7
No. 2/3 mirror unit
8
Copy lamp unit
9
CCD PWB
10
Mirror motor
11
MHPS (Mirror home position sensor)
12
Reference white plate
13
OC glass
The light from the light source (Xenon lamp) is reflected by a document and passed through three mirrors and reduction lenses to the CCD element
(image sensor) where images are formed. This system is known as the reduction image sensor system. Photo energy on the CCD element is con-
verted into electrical signals (analog signals). (Photo-electric conversion). The output signals (analog signals) are converted into digital signals (A/D
conversion) and passed to the MCU (main control/image process section). The resolution at that time is 400dpi. The mirror unit in the scanner section
is driven by the mirror motor. The MHPS is provided to detect the home position of the copy lamp unit.
3. PROCESS SECTION
A. Basic structure
Generate photo energy to scan documents.
Collects light emitted from the copy lamp and radiate the document.
Refracts the reflection light from the document to No. 2 mirror.
Refracts the reflection light from No. 1 mirror.
Refracts the reflection light from No. 2 mirror.
Converges reflected light from the document to form images on the CCD element.
Includes No. 2/3 mirror. Driven in synchronization with the copy lamp unit.
Includes the copy lamp, the reflector, and No. 1 mirror. Driven in synchronization with No. 2/3
mirror unit by the mirror motor.
Reflected light (image) formed on the CCD is converted into electrical signals (analog signals)
then into digital signals and sent to the MCU.
Drives the copy lamp unit and No. 2/3 mirror unit according to the scanning speed.
Detects the home position of No. 2/3 mirror unit.
Reference white sheet for scanning documents. The reference line of magnification ratio
adjustment during SIM is also drawn.
Glass table to put a document on it.
1
Main charger unit
2
Cleaning blade
3
OPC drum
4
Transfer unit
5
Resist roller
6
MG roller
7
(Laser beam)
AL-1611/AL-1622 OPERATIONAL DESCRIPTIONS
6 – 2
Charges the OPC drum.
Collects waste toner on the OPC drum.
Images are formed by laser beams electri-
cally, and toner is attached to the image.
Toner on the OPC drum is transferred to the
print paper by the potential difference.
Makes synchronization between the paper
and the print image.
Magnetic brush is formed by developer to
put toner on the OPC drum.
Forms images on the OPC drum.
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