Sharp AR-M35 / AR-M450 (serv.man8) Service Manual ▷ View online
AR-350/450 BASIC SCANNER SECTION 8-1
[8] SCANNER SECTION
The scanner unit of this machine is largely divided into the (D)SPF section and the flat head scanner section.
1. Outline of the flat head scanner section
1
Copy lamp unit
Lights up to radiate documents. A xenon lamp (operating on 3.15KV) is employed.
2
Reflector
This mirror converges lights on documents.
3
No. 1 mirror
Secures the optical path between a document and No. 2 mirror.
4
No. 2 mirror
Secures the optical path between No. 1 mirror and No. 3 mirror.
5
No. 3 mirror
Secures the optical path between No. 2 mirror and the CCD.
6
CCD/Lens unit
The reduction optical type CCD (Charge Coupled Device) of 7,500 pixels is employed. The scan resolution is 600dpi.
Converts photo energy reflected by the mirrors into electric energy.
Converts photo energy reflected by the mirrors into electric energy.
7
White balance sheet
Serves as the reference sheet of white for scanning with the CCD/Lens unit. If dust or dirt is attached to this sheet, white
streaks may be produced.
streaks may be produced.
8
Table glass
A document is set on this glass. The glass surface is coated for protection against static electricity.
A document is set to the top left corner.
A document is set to the top left corner.
9
SPF scan glass
The copy lamp unit is fixed, and a document is moved over this glass to scan line by line.The glass surface is coated for
protection against static electricity.If dust or dirt is attached to this sheet, black streaks may be produced.
protection against static electricity.If dust or dirt is attached to this sheet, black streaks may be produced.
10
Mirror home position
sensor (MHPS)
sensor (MHPS)
Detects the home position of the mirror base unit.
11
Scan motor
Drives the mirror base and the copy lamp unit.
12
DSPF white balance
sheet
sheet
Serves as the reference sheet of white for scanning with the CIS unit.
If dust or dirt is attached to this sheet, white streaks may be produced.
If dust or dirt is attached to this sheet, white streaks may be produced.
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3
4
2
5
6
8
9
10
11
7
12
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AR-350/450 BASIC SCANNER SECTION 8-2
2. Outline of the DSPF section
1
CIS unit
(AR-EF1 only)
(AR-EF1 only)
This is an image sensor unit to scan the back of a document. An image sensor (CIS: Contact Image Sensor) of 7,196
pixels is employed. The scan resolution is 600dppi.LED lights in the unit are reflected onto the document. Lights
reflected from the document are passed through the lens to form images on the photoelectric conversion elements.
The photo energy is converted into electric energy.
pixels is employed. The scan resolution is 600dppi.LED lights in the unit are reflected onto the document. Lights
reflected from the document are passed through the lens to form images on the photoelectric conversion elements.
The photo energy is converted into electric energy.
2
Document resist roller This roller makes synchronization between the document lead edge and the scan start position.
3
Document resist front
sensor (SPSD)
sensor (SPSD)
Detects that a document reaches the resist roller.
4
Document set sensor
Detects that a document is set on the tray.
5
Document feed roller
Feeds documents.
6
Separation plate
The rubber plate prevents against duplicated feed of documents.
7
Document length
sensor (SLD1/SLD2)
sensor (SLD1/SLD2)
Detects the document length to detect the document size.
8
Document width
detection volume
detection volume
Detects the document width to detect the document guide.
9
SPF motor
Transports a document in the SPF.
10
Document take-up
roller
roller
Picks up a document and transport it to the document feed roller.
11
Document exit roller
Discharges a document.
12
Document exit sensor
Detects document exit.
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2
5
7
8
10
12
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4
6
9
11
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AR-350/450 BASIC SCANNER SECTION 8-3
a. CCD/Lens unit
The reduction optical type CCD (Charge Coupled Device) of 7,500 pixels
is employed. The scan resolution is 600dpi.
is employed. The scan resolution is 600dpi.
Lights reflected from the document are reflected by the mirrors, and
passed through the reduction type lens to form images on the CCD
element. The photo energy is converted into electric energy (analog
element. The photo energy is converted into electric energy (analog
signals).
Line CCD scan is performed line by line.
By moving the carriage unit (lamp and mirror) or by moving the
By moving the carriage unit (lamp and mirror) or by moving the
document, the scan position is shifted in order.
b. CIS unit
This is an image sensor unit to scan the back of a document.
An image sensor (CIS: Contact Image Sensor) of 7,196 pixels is
employed. The scan resolution is 600dppi.
This image sensor is independent from the image sensor of the scanner
This image sensor is independent from the image sensor of the scanner
unit.
It realizes simultaneous scanning of both surfaces of a document.
LED lights in the unit are reflected onto the document. Lights reflected
LED lights in the unit are reflected onto the document. Lights reflected
from the document are passed through the lens to form images on the
photoelectric conversion elements. This photo energy is converted into
electric energy (analog signals). Scanning of CIS is performed line by
electric energy (analog signals). Scanning of CIS is performed line by
line.
By moving the document on the scanning line, the scan position is
shifted in order.
shifted in order.
c. Image signal flow
The image signals made by photoelectric conversion in the CCD/CIS unit
are subject to image process of white balance and shading correction by
are subject to image process of white balance and shading correction by
the CCD/CIS PWB, and passed through the scanner connection PWB to
the scanner control PWB.
The signals are then passed from the scanner control PWB to the MFP
The signals are then passed from the scanner control PWB to the MFP
controller, where they are converted into the laser lighting signals and
passed through the motherboard PCU to the LSU (Laser Scanning Unit).
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AR-350/450 BASIC SCANNER SECTION 8-4
3. Counter table
A. Multi- function model
Simulation
Code
Operation content
UNIT
CONFORMING
COUNT MODE
(26-5)
COUNT TIMING, ETC.
Main Sub
ICU
(Data ID)
FAX
(Data ID)
SCANNER
(Data ID)
ENGINE
(Data ID)
TOTAL
MAINTE
NANCE
DEVE
22
01
Each counter display
(Total/Maintenance/
Developer/RADF/
Staple/Tray)
(Total/Maintenance/
Developer/RADF/
Staple/Tray)
1:TOTAL COUNTER
0010
O
(described later)
2:DRUM
CARTRIDGE
COUNTER
COUNTER
0011
O
(described later)
(Equivalent to the maintenance
counter)
(Equivalent to the maintenance
counter)
3:TONER
CARTRIDGE
COUNTER
COUNTER
0012
O
(described later)
(Equivalent to the developer counter)
(Equivalent to the developer counter)
4:DEVE
CARTRIDGE
COUNTER
COUNTER
0013
O
(described later)
5:MAINTENANCE
COUNTER
001B
O
(described later)
6:TOTAL OUTPUT
COUNTER
0019
O
(described later)
(Equivalent to the copy valid paper)
(Equivalent to the copy valid paper)
7:COPY COUNTER
O
(described later)
(Equivalent to the copy valid paper)
(Equivalent to the copy valid paper)
8:PRINTER
COUNTER
O
(described later)
(Equivalent to the print counter)
(Equivalent to the print counter)
9:FAX OUTPUT
COUNTER
O
(described later)
(Equivalent to the FAX counter)
(Equivalent to the FAX counter)
10:RIGHT SIDE
OUTPUT
COUNTER
COUNTER
001E
O
Counts up on starting main body
paper exit.
(When POD2 ON)
paper exit.
(When POD2 ON)
11:OTHER PRINT
COUNTER
O
(described later)
02
JAM/Trouble
counter display
counter display
1:PAPER JAM
-
-
-
Counts up at every event.
(A jam by door close is not counted.)
(A jam by door close is not counted.)
2:SPF JAM
-
-
-
Counts up at every event.
(A jam by door close is not counted.)
(A jam by door close is not counted.)
3:TROUBLE
-
-
-
Counts up at every event.
(Follows the trouble count method of
SIM 26-35.)
(Follows the trouble count method of
SIM 26-35.)
08
Document/Staple
counter display
counter display
1:SPF DOCUMENT
FEED NUMBER
0011
-
-
-
1 count for every SPF document
exposure in all the modes
exposure in all the modes
2:SCAN NUMBER
0010
-
-
-
1 count for completion of every scan
in all the modes
in all the modes
3:STAPLING
NUMBER
001C
-
-
-
1 count for every staple
4:PUNCHING
NUMBER
001D
-
-
-
1 count for every punching
5:SPF FINISH
STAMP NUMBER
0014
-
-
-
1 count for every stamping
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