Service manual

3 • Theory Of Operation
3-30 DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
LCD Display
Keyboard
LEDs
Socket Modem
PSD
I-Button
Interface
Serial 0
Serial 1
Serial
Peripheral
Serial TTL
ASIC UART
USB Slave
USB Host 1
USB Host 2
MOC
8MB Flash
16MB DRAM
128K NVM
Renesas
SH7720
Microprocessor
Canon
ASIC
USB
HUB
Feeder Control
(DM400c Only)
LSFR
PSOC
Sync
Comm
Motion Control
Processor
H8S/2212
Paper
Sensor
PS1 Output
Transport Motor (Servo)
Carriage Motor (Stepper)
Purge Motor (Stepper)
Paper Sensor PS1
Paper Sensor PS2
Paper Sensor PS3
Transport Encoder
Cap Home Sensor
Pump Home Sensor
Carriage Home Sensor
Cover Sensor
Jam Lever Sensor
Tape Motor
M
M
M
S
S
S
S
S
S
S
S
S
M
LSFR PSOC
Head EEROM
Tank EEROM
Carriage Board
On-Chip Memory
12K RAM
128K Flash
Feeder Motor (Servo)
Feeder Sensor FS1
Feeder Sensor FS2
Feeder Encoder
M
M
M
S
Figure 3-31 System Architecture Block Diagram (DM300c/DM400c/DM450c)
3.6 Electronics
Figure 3-31 below is a block diagram of the system architecture for the
DM300c/DM400c/DM450c.
Figures 3-32 A and B on the subsequent pages provide a simplified block
diagram that shows the printed circuit boards (PCBs) used in the system
and the devices that are connected to them. PCBs and system electronic
components are described on the following pages.