Read Sharp ER-A220 (serv.man2) Service Manual online
CHAPTER 4. HARDWARE DESCRIPTION
1. Hard ware block diagram
CPU
M30624
ROM : 256K Byte
RAM : 20K Byte
RAM : 20K Byte
DRIVER , SENSOR
PRINTER
LP1245A
PAPER TAKE
UP MOTOR
ROM
256K Byte
RAM
128K Byte
Data bus
74HC374
Seg. DRIVER
Dig. DRIVER
REAR
FRONT
LED
KEY RETURN SIGNAL
KEY SCAN SIGNAL
RS232
DRIVER
MAX211
MAX211
RS232
1port
OPTION
REMOTE DRAWWER
ER-05DW/06DW
74HC138
4 to 6
DECORDER
KEYBOARD
MODE SWITCH
HEAD UP SENSOR
RECEIPT NEAR END SENSOR
RS232 /CI SIGNAL
MODE SWITCH
HEAD UP SENSOR
RECEIPT NEAR END SENSOR
RS232 /CI SIGNAL
STANDARD
DRAWER.
DRAWER.
POWER SUPPLY
Address
bus
bus
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