CPU
<For 220/230/240V model>
850E/MA3
ROM: 256KB
RAM: 16KB
FEED, CUT button
Green LED, Red LED
Oscillator circuit
7.6MHZ
DC motor
for full cut
For tape feed
driving
EEPROM
(4Kbit)
FROM 64Mbit
(Max. 64Mbit)
SDRAM 128Mbit
(Max. 128Mbit)
LAN IC
LAN 9115
RS232C
IC
RS232C
IF
Step motor
Bipolar constant current
drive circuit
220/230/240V
INT
(NEC)
+25V
output
LAN
IF
USB IC
D12
USB
IF
Cutter home position
sensor
Media type sensor circuit
6 selector switches
Cover open sensor
Power supply
ON/OFF button
Cover left sensor
Fan motor unit
AC power supply
Switching
power supply
Power supply
shunt PCB
+2.5V power
supply circuit
+3.3V power
supply circuit
Photo sensor for
detecting top edge
of media
DC motor
Normal/reverse
drive circuit
Thermal head
temperature detect circuit
Thermal head
+25V power supply
voltage detect circuit
16bit bus
+2.5V output
(for CPU power supply)
+25V output
(for drive power supply)
+3.3V output
(for logic power supply)
Lock
signal
Key PCB
+5V output
ON/OFF
current control signal
+8V output
Fig. 2.3-2 Block Diagram of Main PCB (For 220/230/240V model)
II- 9