Read Sharp ER-A410 / ER-A420 (serv.man3) Service Manual online
ER-A410/ER-A420
HARDWARE DESCRIPTION
– 13 –
7-2. EFT I/F CONNECTOR SPECIFICATIONS
8. SERIAL I/O
The ER-23X is provided with 2ch of RS-232 PORTs as standard provi-
sion. 1ch of the two is switched with the EFT I/F.
sion. 1ch of the two is switched with the EFT I/F.
The RS-232 ch1 and ch2 are assigned to the following CPU port and I/
O.
O.
Ch1
Ch2
<Serial I/O ch2 receive signal> Read
RS-232/EFT I/F BLOCK DIAGRAM
9. POWER
10. FLASH MEMORY REWRITE PROCEDURE
11. DRAWER
The ER-A410/A420 is provided with 2CH of DRAWER ports.
The DRAWER solenoid energizing time is as shown below.
50ms (max) 45ms(min)
GND
1
2
GND
GND
3
4
GND
A0
5
6
A1
A2
7
8
A3
A4
9
10
A5
VCC
11
12
VCC
/RD
13
14
/WR
/CS3
15
16
D0
17
18
D1
D2
19
20
D3
D4
21
2
D5
D6
23
24
D7
25
26
/EFTRES
/EFT_CD
27
28
EFT_RD
EFT_SD
29
30
/EFT_ER
/EFT_DR
31
32
/EFT_RS
/EFT_CS
33
34
/EFT_CI
/POFF
35
36
/EFTS
GND
37
38
GND
GND
39
40
GND
Pin No.
CPU PORT
Signal to be used
34
/RTS1
/RS1
32
RXD1
RD1
31
TXD1
SD1
26
P74
/ER1
25
P75
/CD1
24
P76
/CS1
23
P77
/DR1
6
P91 (Refer to 6-3.)
/CI1
Pin No.
CPU PORT
Signal to be used
38
/RTS0
/RS2
36
RXD0
RD2
35
TXD0
SD2
18
P84
/ER2
Address
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bir1
Bit0
04000h
X
X
X
X
/CD2
/DR2
/CS2
/CI2
IPL from EP-ROM: Set the IPL SW to ON and turn on the power, and
the EP-ROM will be boosted.
The bank of the EP-ROM program is switched
through S-RAM to transfer the program to the
FLASH ROM.
FLASH ROM.
IPL from COM:
Data from PC is written through the COM port to
the FLASH ROM. (Max. 38.4kbps)
CPU
Ch1 connector
Ch2 connector
MUX
EFT I/F PWB
B
AA/B
Y
+5V
Service interruption should be performed
within 10ms after generation of /POFF.
within 10ms after generation of /POFF.
TRANS.
LM2574 + TR
24V
DRAWER
PRINTER
PRINTER
ON/OFF control
(MODE SW)
(MODE SW)
PQ1CG2032
VLED 5.7V
VCC 5.0V
VDD 5.0V
BATTERY
/POFF detection point
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