Sharp AL-800, AL-840, Digital Copier service manual Mhps, Ccd Ccd Out, SL Sensor PDA/PDK

(2) Major parts

10)

4) MHPS

11)

8) SL SENSOR

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2)

6) CCD SENSOR

3)5)

2)

7)

4) MHPS 10) 8) SL SENSOR 7) 6) CCD SENSOR

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					11)	9)	5)	3)
No.				Parts				Note
	Code	Signal name	Name	Type	Function/operation		Active condition
1			Scanner lamp		Drives the scanner lamp.
			control PWB		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	Photo	Detects the scanner home		HIGH (5V) when
			position sensor	transmission	position. By this signal the image		the home position
				sensor	scanning operation is controlled.		is detected.
5			Lens		Transfers the document image to
					CCD.
6	CCD	CCD OUT	CCD (Image)	CCD	Scans the document images		Digital signal
	SENSOR		sensor		(photo signals) and converts		(8Bit)
					them into electrical signals.
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	Photo diode	Detects the scanner lamp light		Analog signal
			quantity sensor		quantity. This signal is inputted to		(0 ∼ 0.5V)
					the scanner lamp control PWB to
					control the scanner lamp drive
					voltage to maintain a constant
					level of light quantity.
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.

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