Sharp ER-A450T Service Manual - Page 9
Hardware Description
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CHAPTER 4. HARDWARE DESCRIPTION 1. Hard ware block diagram DRAWER CPU STA NDARD RAM1 256KB OPTIONAL RAM2 ER-03RA:512KB 512KB TPRC1 GATE ARRAY MPCA7 PRINTER PR-45M OPC2 STA NDARD ROM 512KB CKDC8 RS232 I/F 1 ports OPERATER DISPLAY 1 LINE 7SEG 10DIG CUSTOMER DISPLAY 1 LINE 7SEG 7DIG SWITCH KEY BOARD RS232 I/F CH1 Fig. 1-1 4 - 1
CHAPTER 4. HARDWARE DESCRIPTION
1. Hard ware block diagram
Fig. 1-1
CPU
GATE ARRAY
MPCA7
DRAWER
STANDARD
RAM1
256KB
OPTIONAL
RAM2
512KB
ER-03RA:512KB
STANDARD
ROM
512KB
SWITCH
KEY BOARD
RS232
I/F
1 ports
RS232
I/F
CH1
CKDC8
OPC2
1 LINE
7SEG
7DIG
1 LINE
7SEG
10DIG
CUSTOMER DISPLAY
OPERATER DISPLAY
TPRC1
PRINTER
PR-45M
4 – 1