Electronics - Pitney Bowes DM300c Service Manual

3 • Theory Of Operation

3.6 Electronics

LCD Display
Keyboard
LEDs
Serial 0
Socket Modem
I-Button
PSD
Serial 1
Interface
Serial
Serial TTL
Peripheral
ASIC UART
USB Slave
USB Host 1
USB Host 2
MOC
3-30
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.
8MB Flash
16MB DRAM
128K NVM
Renesas
SH7720
Microprocessor
USB
HUB
Feeder Control
(DM400c Only)
On-Chip Memory
12K RAM 128K Flash
Figure 3-31 System Architecture Block Diagram (DM300c/DM400c/DM450c)
Canon
ASIC
Sync
Comm
LSFR
PSOC
Paper
Sensor
PS1 Output
Motion Control
Processor
H8S/2212
DM300c/DM400c/DM475 Service Manual (SV61801 Rev. D)
Transport Motor (Servo)
M
Carriage Motor (Stepper)
M
Purge Motor (Stepper)
M
Paper Sensor PS1
S
Paper Sensor PS2
S
Paper Sensor PS3
S
Transport Encoder
S
Cap Home Sensor
S
S Pump Home Sensor
S Carriage Home Sensor
S Cover Sensor
S Jam Lever Sensor
M
Tape Motor
Carriage Board
LSFR PSOC
Head EEROM
Tank EEROM
Feeder Motor (Servo)
M
M Feeder Sensor FS1
M
Feeder Sensor FS2
S
Feeder Encoder