II - 9
2.3
MAIN PCB
Fig. 2.3-1 shows the block diagram of the main PCB. The main PCB consists of the
following components.
(1) CPU (Including ROM and RAM)
(2) EEPROM (16Kbit)
(3) Power supply ON/OFF circuit, Feed button ON/OFF circuit, Cut button ON/OFF
circuit, LED ON/OFF circuit
(4) Head power supply ON/OFF circuit
(5) Full cutter motor driver circuit and Media feed motor driver circuit
(6) Media type detect sensor circuit, Media position detect sensor circuit and Cover
open sensor circuit
(7) Head temperature detect circuit
(8) Cutter home position detect sensor circuit
(9) Reset circuit
(10) USB interface circuit
(11) 256Mbit SDRAM
(12) 128Mbit Flash ROM
(13) Ethernet interface circuit
(14) Serial interface circuit
Fig. 2.3-1 Block Diagram of the Main PCB
INT
INT
INT
USB I/F
EEPROM
16Kbit
CPU
LPL1830
(NXP)
Media type detect
circuit
5 selector switches
Media position detect
sensor circuit
Photo sensor
Cover open sensor
circuit
Cutter home position
detect sensor circuit
ON/OFF button
Feed, Cut, Wi-Fi button
LED (Green, Red),
Green LED
AC power supply
Switching
power supply
+3.3V power
supply circuit
+25V output
(for drive power
supply)
+25V output
+8V output
+3.3V output
(for logic power
supply)
Oscillator circuit
12MHz
256Mbit SDRAM
128Mbit Flash ROM
DC motor drive circuit
Normal/reverse
drive circuit
DC motor for
full cut
Thermal head
Thermal head
temperature
detect circuit
+25V power supply
voltage detect
circuit
Step motor
Bipolar constant
current drive circuit
Step motor for
media feed drive
Ethernet I/F
Serial I/F
