Service manual

Chapter 3
3-2
3.1.2 Functional Block Diagram
0006-3944
F-3-2
3.1.3 Image Processor PCB
0007-7164
It controls the machine as a whole, and communicates directly with all PCBs except the sensor PCB and modular
jack PCB.
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
Memb-
rane
LCD
Speaker
*3
Telephone line
To power supply
Transmission
Modular
Jack
PCB
*3
Delivery
sensor
NCU PCB
*3
Fixing assembly
Power supply PCB
Switching
regulator
Cartridge
DC controller PCB
Fixing heater control block
High-voltage control block
Drive control block
Sensor detection
Image processor PCB
interface block
Laser control block
Horizontal sync signal control
Scanner motor control
Cartridge detection mechanism
Toner level detection
mechanism
Key detection
and LCD/LED
drive
LCD
function
Serial
communication
control
Control panel
PCB
2-Line/4-Line
conversion circuit
Dial pulse
generation
circuit
Line voltage
conversion circuit
Off-hook
detection
circuit
Image processor PCB
Drive control block
Control panel control block
Image processing control block
Sensor detection
Memory function
ESS control
Communication control block
Speaker control
*3
J403
J4030 J4020
J402
J401 J1/J2 J103/104 J204/201
J315 J319/J320
*3
J301/302 J303/304
J404 J7/J8
Analog
processor
PCB
Contact sensor
Sensor PCB
Reader motor
ADF
*1
Laser scanner motor driver
Scanner
motor
Fan
Manual feed pickup
solenoid
Manual feed tray
paper sensor
Cassette pickup
solenoid
Laser driver/
BD PCB
Original
sensor
Registration
sensor
ADF motor
J317
J501
J503
J504
J502
J601
J310
J3102
J311
*1
J3112
J3113
J3114
J3110
J316
J801 J3120
J3124
J312 J309 J307 J314 J308
Communication
Control
USB serial
number notice
function
Smoothing
Printer Controller
PCB
*2
Parallel I/F
USB I/F
J701
J318
*2
J107 J206
J902J102
J205/J207/208/J209 J105/
J107/
J911/J912
Reception
J1051
PS3
PS102 PS103
PC
PS4
Contact sensor
home position
sensor
PS1
ADF
(copyboard cover)
open/close
sensor
PS2
PS6
PS7
Original
delivery
sensor
PS8
SL2SL1FM1
M4
M3
M2
Main motor driver
Main
motor
J3123
M1
Cassette
paper sensor
Paper leading
edge sensor
J4 J902
FT101 FT901
Reader unit slide
detecting switch
*1 : If equipped with ADF functions.
*2 : If equipped with printer functions.
*3 : If equipped with fax functions.
SW1
PS101
LGL paper sensor