Sharp AR-M35 / AR-M450 (serv.man8) Service Manual ▷ View online
AR-350/450 DATA FLOW 7-4
H. Software composition
I. Name of function block
name of function block
description
PWB
software
scanner block
This block controls SCAN ASIC and scanner unit.
SCAN
scanner
task for management of copier
input sequence
input sequence
This block manages input sequence of copier image and handles scanner unit. At
same time,it sets ICU ASIC parameter and starts up each task.
same time,it sets ICU ASIC parameter and starts up each task.
MFP
copier application
scanning task
This block sets parameters for taking image to ICU ASIC from SCAN ASIC.
MFP
copier application
compression task with PM22
This block sets parameters for compressing image from SCAN ASIC.
MFP
copier application
local memory
This memory block is used for storage compressed data for ERDH area at copier
function.
function.
MFP
expansion task with PM22
Image in local memory is expanded and this block transfers it to next block.
MFP
Print task
rotation task
This block rotates input image and transfers it to memory.
MFP
Print task
LSU output task
This block outputs image.
MFP
Print task
task for management of print
sequence
sequence
This block handles engine unit sequence and starts lower task at each sequence
timing.
timing.
MFP
Print task
engine block
This block prints image and controls LSU.
MFP
Engine
(without HDD Option)
Scanner Block
Engine Block
Image processing
Control information
Manage of Print
sequence
Manage of Copier
input sequence
Manage of Copier
input sequence
Scanning Task
Compression Task with PM22
Local Memory(ERDH)
Expansion Task with PM22
Print task
Rotation Task
LSU output Task(RET)
(with HDD Option)
Scanner Block
Engine Block
Image processing
Control information
Manage of Print
sequence
Scanning Task
Compression Task with PM22
HDD Memory(ERDH)
Expansion Task with PM22
Print task
Rotation Task
LSU output Task(RET)
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AR-350/450 DATA FLOW 7-5
2. Image data flow when copying
SCAN ASIC
SCAN ASIC
PM-2500
I/O ASIC
PCU PWB
Laser beams
ICU ASIC
MFP control PWB
Scanner
section
section
Printer engine
CIS PWB
CCD PWB
CCD
Analog
process IC
A/D
conversion
Shading
correction
Density conversion
AE process
Area separation
Filter process
Electroniczoom
resolution
conversion
Output LUT
2-digit error
diffusion
Pattern matching
thin-out
Data transfer
control block
PCI
interface
Rotation
SDRAM
Compression
Expansion
Smoothing
Main scan 2-pixel
average
CIS
<600Dpi>
<600Dpi>
Shading
correction
Density conversion
AE process
Area separation
Filter process
Electronic zoom
resolution
conversion
Output LUT
2-digit error
diffusion
Pattern matching
thin-out
Data transfer
control block
Main scan 2-pixel
average
2-digit
zoom
LSU
Data
transfer
control
Sync VIDEO
signal
generation
System
Controller
SDRAM
PCI-IDE
conversion
3.5" HDD
Analog
process IC
A/D
conversion
Data
transfer
control
1
1
2
3
4
5
6
7
8
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AR-350/450 DATA FLOW 7-6
3. Flowchart of image process
(1)
CCD unit
Employs the reduction optical type line CCD
(Charged Coupled Device) of 7500 pixels.
The scan resolution is 600dpi.
Reflects the copy lamp light onto the
document.
Light reflected onto the document is passed
through the reduction lens to form images on
the photo electric conversion element.
The photo energy is converted into electric
energy.
The CCD is scanned by every line.
The scan position is shifted sequentially by
shifting the carriage unit (lamp and mirror) or
by shifting the document.
(Charged Coupled Device) of 7500 pixels.
The scan resolution is 600dpi.
Reflects the copy lamp light onto the
document.
Light reflected onto the document is passed
through the reduction lens to form images on
the photo electric conversion element.
The photo energy is converted into electric
energy.
The CCD is scanned by every line.
The scan position is shifted sequentially by
shifting the carriage unit (lamp and mirror) or
by shifting the document.
(2)
CIS unit
Employs the CIS (Contact Image Sensor) of
7196 pixels.
The scan resolution is 600dpi.
Reflects the LED light in the unit onto the
document.
Light reflected on the document is passed
through the lens to form iamges on the photo
electric conversion element.
The photo energy is converted into electric
energy.
The CIS is scanned by every line.
The scan position is shifted sequentially by
shifting the document.
7196 pixels.
The scan resolution is 600dpi.
Reflects the LED light in the unit onto the
document.
Light reflected on the document is passed
through the lens to form iamges on the photo
electric conversion element.
The photo energy is converted into electric
energy.
The CIS is scanned by every line.
The scan position is shifted sequentially by
shifting the document.
(3)
Analog process
The photoelectic conversion element outputs
analog signals.
The analog signals are amplified.
analog signals.
The analog signals are amplified.
(4)
A/D conversion
The analog image signals are converted into
digital signals.
Conversion is made in 8bit (256 gradations).
(0 - 255)
digital signals.
Conversion is made in 8bit (256 gradations).
(0 - 255)
(5)
White balance
process
process
Each correction of white level and dark
composition is performed according to the
value when the copy lamp is blinked a certain
times at the white balance position.
composition is performed according to the
value when the copy lamp is blinked a certain
times at the white balance position.
(6)
Density
conversion
(AE process)
conversion
(AE process)
Density correction for the scanner side
(input side). LUT is sued for density correction.
Four kinds of LUT are used for that operation:
AE,/TEXT/PHOTO/TEXT-PHOTO.
(input side). LUT is sued for density correction.
Four kinds of LUT are used for that operation:
AE,/TEXT/PHOTO/TEXT-PHOTO.
(7)
Main scan 2
pixels average
pixels average
Pixel thin-out is performed depending on the
mode of scanning.
mode of scanning.
(8)
Area separation
As shown in the figure, pixels of 5 x 4 are
sampled and the total value of each side is
compared. (The difference between the total of
side A and the total of side B, and the
difference between the total of side C and the
total of side D)
If the difference is great, it is judged as Text,
and if smaller, Photo.
sampled and the total value of each side is
compared. (The difference between the total of
side A and the total of side B, and the
difference between the total of side C and the
total of side D)
If the difference is great, it is judged as Text,
and if smaller, Photo.
(9)
Filter process
(MTF correction)
(MTF correction)
According to the judgment of images in area
separation, the gradation is adjusted so that
the text area becomes sharp and the photo
area becomes soft. (Filtering)
separation, the gradation is adjusted so that
the text area becomes sharp and the photo
area becomes soft. (Filtering)
(10) Electronic zoom
process
"Linear interpolation is performed according to
the zoom ratio of enlargment or redeuction.
the zoom ratio of enlargment or redeuction.
(11) Output LUT
Density correction for the scanner side
(input side). Performed with LUT.
Four kinds of LUT are used:
AE/TEXT/PHOTO/TEXT-PHOTO.
(input side). Performed with LUT.
Four kinds of LUT are used:
AE/TEXT/PHOTO/TEXT-PHOTO.
A
C
D
B
(12) 2-digit error
diffusion
8bit image data are converted into 2-digit
image data by using error diffusion.
image data by using error diffusion.
(13) Pattern matching
thin out
(14) Data transfer
block
Serial communication control is performed
between the CCD PWB and the MFP control
PWB.
Data are transferred normally by 1 line. When
zooming, however, since the data size is great,
transfer is made by 2 lines.
between the CCD PWB and the MFP control
PWB.
Data are transferred normally by 1 line. When
zooming, however, since the data size is great,
transfer is made by 2 lines.
(15) SDRAM
Signals sent to the MFP control PWB in serial
communication are passed through the
ICU-ASIC to be stored in the SDRAM.
The storage capacity is 2 pages of A3 paper.
Then the signals are sent to the ICU-ASIC
again.
communication are passed through the
ICU-ASIC to be stored in the SDRAM.
The storage capacity is 2 pages of A3 paper.
Then the signals are sent to the ICU-ASIC
again.
(16) Compression
Image data are sent from the ICU-ASIC to the
CODEC-IC and compressed.
The compression type at that time is the JPEG
type.
Then the data are passed through the PCI
interface of the ICU-ASIC again to the image
memory block.
CODEC-IC and compressed.
The compression type at that time is the JPEG
type.
Then the data are passed through the PCI
interface of the ICU-ASIC again to the image
memory block.
(17) Image memory
block
There are two kinds of image memory blocks:
the SDRAM and the hard disk.
Use of memory in this area is described later.
In this block, image data are compressed and
stored.
the SDRAM and the hard disk.
Use of memory in this area is described later.
In this block, image data are compressed and
stored.
(18) Expansion
Image data taken from the image memory
block are passed through the ICU-ASIC again
to ther CODEC-IC, and decompressed.
block are passed through the ICU-ASIC again
to ther CODEC-IC, and decompressed.
(19) Rotation
Image data are rotated acording to the paper
size.
size.
(20) 2-digit zoom
The zoom block for printing used when
receiving FAX. Zooming is performed by 2-digit
data.
receiving FAX. Zooming is performed by 2-digit
data.
(21) Smoothing
Smoothing is performed by the EET
(Edge Enhancement Technology).
(Edge Enhancement Technology).
(22) Sync Video
signal generation
2-digit image data are synchronized with the
LSU timing.
LSU timing.
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AR-350/450 DATA FLOW 7-7
4. Flash Memory Capacity
This model incorporates the following Flash ROMs.
A. Drive voltage
The Flash ROMs in this model are driven by 3.3V.
Since those in the conventional models, such as the AR-280 series, are driven by 5V, there is no compatibility.
5. Purpose of use of expansion memory
When an expansion memory is added to this machine, the following items are improved.
• Reduction in timeout error
• Reduction in spool time
• Avoidance of memory full
For expansion RAM, use a commercially available one of the following specifications.
If a RAM of different specifications is installed, it is not recognized or its capacity is not correctly recognized.
<Expansion RAM specifications>
<Printer control PWB> Standard memory: 32MB
<MFP control PWB> Standard memory: 64MB
The page memory stores the sheet of the following capacity. (Reference value: A4 5% reference document)
The AR-HD3 is a hard disk drive of 5GB capacity.
Since, however, this machine requires a work area for controlling the page data in the HDD, 2GB area is used for that purpose.
PWB name
ROM name
Capacity
CN number
File name (Reference example)
Printer control PWB
Boot
32Mbit x 2
CN3
Ve606'_main.sfu
Main
MFP control PWB
Boot
32Mbit x 2
CN3
Vm201A_boot.sfu
Main
32Mbit x 2
CN4
Vm606'_main.sfu
PCU PWB
PCU
8Mbit x 1
Socket 1
P030400.sfu
Scanner control PWB
Scanner
8Mbit x 1
Socket 1
S040000.sfu
MDMC PWB (FAX PWB) FAX
16Mbit x 1
CN106
Mdmc201.sfu
DIMM TYPE
168pin 3.3V Unbufferd SDRAM DIMM Non-ECC
DIMM capacity
64MByte, 128MByte, 256Mbyte
CAS
CL=2
SDRAM
For PC100, PC133
Parity
Not support
ECC
Not support
HDD not installed
HDD installed
Expansion
memory
Total memory
Printer memory
Other
Page memory
Printer memory
Other
Page memory
None
32MB
12MB
10MB
10MB
14MB
18MB
2GB
64MB
96MB
48MB
10MB
38MB
50MB
18MB
2GB
128MB
160MB
80MB
10MB
70MB
110MB
18MB
2GB
256MB
288MB
128MB
10MB
150MB
270MB
18MB
2GB
HDD not installed
HDD installed
Expansion
memory
Total memory
Printer memory
Other
Page memory
Printer memory
Other
Page memory
None
64MB
12MB
20MB
32MB
18MB
46MB
2GB
64MB
128MB
48MB
20MB
60MB
82MB
46MB
2GB
128MB
192MB
80MB
20MB
92MB
146MB
46MB
2GB
256MB
320MB
128MB
20MB
172MB
274MB
46MB
2GB
32MB
About 140 sheets
2GB
About 10000 sheets
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