Sharp AL-841 User Manual download pdf (Page 4)

[5] EXTERNAL VIEW AND INTERNAL STRUCTURE

B. Internal parts

(1) Parts in each section

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 SENS

OR

11) 9) 5) 3)

2)

3)

2)

1)

4) MHPS

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