Service manual

3 • Theory Of Operation
3-32 DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
3.6 Electronics
Renesas
SH7721
Microprocessor
Canon
ASIC
Keyboard
Color LCD Display
Socket Modem
LEDs
i-Button
Interface
DM475 PRINTER
USB
Hub
USB Slave
Serial Peripheral
LFSR
PSOC
USB Host1
USB Host2
Print Head
LFSR PSOC
Head EEROM
Tank EEROM
Jam Lever Sensor
S
Cover Sensor
S
Carriage Home Sensor
S
Pump Home Sensor
S
Cap Home Sensor
S
Transport Encoder
S
Paper Sensor S3
S
Paper Sensor S2
S
Paper Sensor S1
S
Transport Motor (Servo)
M
Carriage Motor (Stepper)
M
Purge Motor (Stepper)
M
Serial 0
Serial 1
Serial TTL
ASIC UART
16MB DRAM
256K NVM
8MB Flash
Sync Comm
PSD
RJ45 LAN Interface
USB to Page 2
SMSC LAN91C111
Ethernet controller
WOW/Feeder
Control Processor
50MHz H8SX/
1662
On Chip Memory
Ram 40KB Flash 384KB
Tedea #1041 Load Cell
DW84009
Inst AMP & AD(20bit)
AD620, & AD7703
Junction
PCB
Transport Motor Thermistor
Transport Motor (Servo)
Transport Motor Encoder
WOW Mid Sensor
WOW Exit Sensor
Thickness Encoder
12C
DM475 FEEDER/WOW
USB from Main
PCB
EEPROM
BR24L08 2Kx8
62138 256Kx8
or equivalent
SRAM
JTAG debug conn
Power
+5V/+27V
S
M
S
S
S
S
Width Sensor
Width Sensor
Width Sensor
USB Boot control
signal
A/D
(Logic)
(Motor)
FFC
Feeder Motor (Servo)
Feeder Sensor F 1
Feeder Sensor F 2
Cover Interlock
Feeder Motor Encoder
Feeder Motor Thermistor
M
S
S
S
S
S
Figure 3-32 B System Architecture Block Diagram (DM475)