Canon imageCLASS MF6500 Series, Service Manual

Page: 46 / 228

Chapter 2
2-2
2.1.2 Functional Block Diagram
0011-3538
LaserBase MF6530 / / LaserBase MF6540PL / LaserBase MF6550 / KaserBase MF6560PL / / LaserBase MF6580PL
F-2-2
2.1.3 Image Processor PCB
0011-3549
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.
Power supply PCB
DC controller PCB
Relay PCB
*1 : If equipped with fax functions.
*2 : If equipped with printer functions.
J2008
SR2002
J2005
J406
SR2003
J2006
SR2004
J2007
SR2001
J2004
SL2003
SL
J451
J412
SR401
J409
M401
M
J2003
J411
SL2002
SL
J2001
SL2001
SL
J2002
J410
M2001
M
Analog processor PCB
Image processor PCB
Contact
snsor
J460
J408
Control
panel J1701
J318
NCU PCB*1
J404
J309
J403
J308
J314
J104
J205
CL1 CL
J209 J111
J103 J14 J201 J106
J204
SL1 SL
J203
SL5 SL
J207
SL2 SL
J33
SR9
J39 J208
SR10
J36
SR12
J35 J202
SR11
Fixing unit
J201
FM1
TH101 TH102
J113 J110
J29
Main
motor
M1
J105
J30
Scanner
unit
J1800
J1922
Mojular jack
PCB*1
J1923
J13
J1300
J304
Network
PCB*2
J10/J11
To Power
supply PCB
J401/
J402
TP1
H1
J15
To analog
processor
PCB
J401/402
J10/J11
J16
PC
LAN I/F
T
ransmission
T
e
lephone line
Reception
Modem PCB*1
J1202
J1924
J1201
J1921
J1203
Speaker*1
J313
J1200
Cassette unit
(Option)
J108
J903
SR1
J902
SL3
SL
J900
J102
J31
SW2
J112
J103
J12
J38
SR5
J107
J114
J2
Humidity
sensor
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