Functional Block Diagram; Image Processor Pcb - Canon MF6500 Series Service Manual

Chapter 2

2.1.2 Functional Block Diagram

LaserBase MF6530 / / LaserBase MF6540PL / LaserBase MF6550 / KaserBase MF6560PL / / LaserBase MF6580PL
SR2004
J2006
J401/
J402
J10/J11
To Power
supply PCB
CL1 CL
SL1 SL
SL5 SL
SL2 SL
FM1
SR9
J33
SR10
J39
SR12
J36
SR11
J35
*1 : If equipped with fax functions.
*2 : If equipped with printer functions.

2.1.3 Image Processor PCB

LaserBase MF6530 / / LaserBase MF6540PL / LaserBase MF6550 / KaserBase MF6560PL / / LaserBase MF6580PL
1.function
The image processor PCB has the following functions.
Drive Control Block
The drive control mechanism acts on the reader motor and the ADF motor by the work of the ASIC and motor drive IC.
Control Panel Control Block
The control panel control block receives the state of control keys while sending/receiving data in serial communication with the control IC of the control panel PCB.
Also, it sends LED and LCD signals to the control panel PCB.
Image Processing Control Block
- It subjects the digital image data from the analog processor PCB to enlargement/reduction processing, shading correction, smoothing, and other image processing,
thereby converting it to 600x600-dpi image signals (VD0, VD01*, VDO2, VDO2*).
- It converts the analog image data from fax communication into 600x600-dpi image signals (VD0, VD01*, VDO2, VDO2*).
- It uses a horizontal sync signal (BD0*) as a trigger to send image signals (VD0, VD01*, VDO2, VDO2*) to the laser unit.
- The image data from the contact sensor is re-arranged, and the intensity of the contact sensor LED is controlled.
Smoothing
The 300 x 300-dpi image data from the PC is converted into image data equivalent of 1200 x 600 dpi; or, 600 x 600-dpi image data is converted into data equivalent
of 2400 x 600-dpi.
Sensor Detection
It detects the state of each sensor of the reader unit and the ADF.
ESS Control
It controls the ESS function used to reduce the power consumption while the machine isin standby state.
Memory Storage
Image data is stored in SDRAM, and is retained for about 1 hr even after the power is removed by the work of the super capacitor mounted on the modem PCB.
The system software and various data (e.g., user data, service data) are held by flash ROM.
Speaker Control (if equipped with fax functions.)
It turns on/off or control the volume of the error sound, key sound, and line monitor sound generated by the speaker.
MEMOÅF
The volume of the line monitor or the sound of the key sound or the error sound is adjusted in user mode.
2. Construction
The image processor comes in different ROM types/sizes and RAM sizes according to models.
2-2
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SL2002 M2001
SR2003 SR2001
SR2002 SL2003 SL2001
SL SL SL M
J2005 J2008 J2007 J2004 J2003 J2001 J2002
J406 J411 J410
Analog processor PCB
J404 J403
J309 J308
Control
panel
J209 J111
J205
J201 J106
J204
J112
J114
J203
J207
Relay PCB
SW2
J201
J2
Humidity
sensor
J208
J202
Contact
SR401 M401
PC
snsor
M
J451 J460
LAN I/F
J408
J412 J409
Network
PCB*2
J1300
J304
Image processor PCB
J314
J104
DC controller PCB
J108 J113 J110
J107
J900
J38
J29
M1
SR5
Main
J903 J902
motor
SL
SR1 SL3
Cassette unit
(Option)
TH101
TH102
TP1
H1
Fixing unit
F-2-2
Speaker*1
J1203
Modem PCB*1
Mojular jack
PCB*1
J1202
J1201
J1800
J1200
J313
J1924
J1921
J1922
NCU PCB*1
J1923
J103
J13
J12
J103 J14
J105 J102
J31
J30
Scanner
unit
Power supply PCB
To analog
processor
PCB
J401/402
J10/J11
J16
J15
0011-3538
0011-3549