Service manual

Rev. 2.00
- 50 -
SRP-275
4-2 Block Diagram
CPU
S3C4640X01
AC adapter
DC24V
Power
supply
circuit
Reset
circuit
EEPROM
M24C04
Flash
memory
M29F800
DRAM
K4F151611D
LED &
switch
DIP
Switch
LED &
button
circuit
DIP
sensing
circuit
Drawer &
buzzer
Driver
Clock
circuit
(40MHz)
Clock
(10MHz)
RS-232
driver
RS-232C
connector
IEEE1284
driver
Parallel
connector
USB
driver
USB
connector
Sensor
circuit
Paper end,
home position
sensor
Head
driver
Printer-
head dot
HF motor
driver
HF Motor
Auto cutter
Drive
Auto cutter,
home position
sensor
Sensor
circuit
Paper near end,
Paper near end-W,
Rear cover open
PF Motor
Driver
PF Motor
Address
Data
Address
Data
+5V
+24V
I/F board
Printer mechanism