c. Optical section
<1> Scanner (reading) section
No.
Parts
Note
Code
Signal
name
Name
Type
Function/operation
Active condition
1
Scanner lamp
control PWB
Drives the scanner lamp. Maintains the
lamp light quantity at a constant level.
2
Scanner drive wire
Transmits the scanner motor power to
the scanner unit.
3
Scanner motor
Drives the scanner unit.
4
MHPS
MHPS
Scanner home
position sensor
Photo
transmission
sensor
Detects the scanner home position. By
this signal the image scanning
operation is controlled.
HIGH (5V) when
the home position
is detected.
5
Lens
Transfers the document image to CCD.
6
CCD
SENSOR
CCD OUT
CCD (Image)
sensor
CCD
Scans the document images (photo
signals) and converts them into
electrical signals.
Digital signal (8Bit)
7
Scanner lamp
Radiates light to the document to allow
the CCD to scan the document images.
8
SL SENSOR
PDA/PDK
Scanner lamp light
quantity sensor
Photo diode
Detects the scanner lamp light
quantity. This signal is inputted to the
scanner lamp control PWB to control
the scanner lamp drive voltage to
maintain a constant level of light
quantity.
Analog signal
(0
∼
0.5V)
9
No. 1 mirror
Leads the document image to CCD.
10
No. 2 mirror
Leads the document image to CCD.
11
No. 3 mirror
Leads the document image to CCD.
10)
11)
8) SL SENSOR
9)
7)
6) CCD SENSOR
5)
4) MHPS
10)
8) SL SENSOR
7)
6) CCD SENSOR
11)
9)
5)
3)
2)
3)
2)
1)
4) MHPS
FO-3800M
5 – 7
