Sharp ER-A410 / ER-A420 (serv.man3) Service Manual ▷ View online
ER-A410/ER-A420
HARDWARE DESCRIPTION
– 7 –
CHAPTER 4. HARDWARE DESCRIPTION
1. BLOCK DIAGRAM
ER-23X
2. MEMORY MAP
2-1. ADDRESS MAP
Only the /CS0, /CS1 area (28000h~FFFFFh) in the bank is valid.
2-2. EXTERNAL BUS
*
CGROM is available only for the Japanese market.
CPU
MITSUBISHI M30620SAFP 12MHz
(INTERNAL RAM 10KB)
(INTERNAL RAM 10KB)
EXTERNAL MEMORY
RAM
512KB
FLASH ROM
512KB
SHARP LH28F004BVT
CGROM
1MB (JAPAN ONLY)
PRINTER
PR45M
II
POWER
SUPPLY
CPU
RAM 10KB
DRAWER 1
DRAWER 2
RAM CGROM
512KB 1MB
DRIVER, SENSOR
DRIVER, SENSOR
PRINTER
EFT I/F BOARD
(option)
MUX
RS232C CH1
RS232C CH2
KEY & SW
KEY SCAN
KEY RETURN
4 to 16
DECODER
SEG DRIVER
DIG DRIVER
LCD
16 DIGITS
x 2 LINES
POPUP
7-DIGIT
7-DIGIT
LED
EXTERNAL BUS ACCSESS SPEED
SRAM/EPROM/FLASH ROM; 2 BCLK
CGROM; 3 BCLK
EXTERNAL I/O; 2 BCLK
*
1BCLK = 83.3ns (at 12MHz)
SRAM
/CS2 area
address 08000h~27FFFh 128KB
/CS1 area BANK 0,2
address 28000h~2FFFFh 32KB x 2
/CS0 area BANK 0
address 30000h~7FFFFh 320KB
FLASH ROM
/CS0 area BANK 0
address 80000h~FFFFFh 258KB
(Moves to Bank 1 when rewriting using EPROM.)
CGROM
/CS0 area BANK 2,3
address 40000h~BFFFFh (512KB x 2)
I/O
/CS3 area BANK0
address 04000h~07FFFh 16KB
Internal RAM area
10KB
External SRAM
4
64KB
External SRAM
5
256KB
CG ROM
512KB
(Lower level)
FLASH ROM
Lower 256KB
FLASH ROM
Lower 256KB
IPL SW
OFF: Flash ROM
ON: EP RPM
OFF: Flash ROM
ON: EP RPM
IPL SW
OFF: EP ROM
ON: Flash RPM
OFF: EP ROM
ON: Flash RPM
CG ROM
512KB
(Upper level)
External SRAM
2
32KB
External SRAM
3
32KB
External SRAM
1
128KB
Internal reserved area
External I/O
Even if the bank is changed, the same
address can be accessed.
address can be accessed.
00400h
00000h
BR1
BR0
/CS0
0
0
0
BANK 0
0
1
0
BANK 1
1
0
0
BANK 2
1
1
0
BANK 3
02C00h
04000h
08000h
28000h
30000h
40000h
50000h
80000h
C0000h
FFFFFh
/CS3
/CS2
/CS1
/CS0
ER-A410/ER-A420
HARDWARE DESCRIPTION
– 8 –
3. CPU PIN TABLE
M16C/24 PORT MEMORY SPACE: NORMAL MODE
PROCESSOR MODE: MICRO PROCESSOR MODE
It is used by (SEPARATE BUS 8bit width).
PORT
PIN
No.
I/O
Pin
name
Signal
name
Initial
value
value
OFF
MODE
Function
P00
88 I/O
D0
D0
Out L
P01
87 I/O
D1
D1
Out L
P02
86 I/O
D2
D2
Out L
P03
85 I/O
D3
D3
Out L
P04
84 I/O
D4
D4
Out L
P05
83 I/O
D5
D5
Out L
P06
82 I/O
D6
D6
Out L
P07
81 I/O
D7
D7
Out L
P10
80
O
P10
RAS
L
Out L
RECEIPT
PAPER FEED A
PAPER FEED A
P11
79
O
P11
RBS
L
Out L
RECEIPT
PAPER FEED B
PAPER FEED B
P12
78
O
P12
RCS
L
Out L
RECEIPT
PAPER FEED C
PAPER FEED C
P13
77
O
P13
RDS
L
Out L
RECEIPT
PAPER FEED D
PAPER FEED D
P14
76
O
P14
JAS
L
Out L
JOURNAL
PAPER FEED A
PAPER FEED A
P15
75
O
P15
JBS
L
Out L
JOURNAL
PAPER FEED B
PAPER FEED B
P16
74
O
P16
JCS
L
Out L
JOURNAL
PAPER FEED C
PAPER FEED C
P17
73
O
P17
JDS
L
Out L
JOURNAL
PAPER FEED D
PAPER FEED D
P20
72
O
A0
A0
Out L
P21
71
O
A1
A1
Out L
P22
70
O
A2
A2
Out L
P23
69
O
A3
A3
Out L
P24
68
O
A4
A4
Out L
P25
67
O
A5
A5
Out L
P26
66
O
A6
A6
Out L
P27
65
O
A7
A7
Out L
P30
63
O
A8
A8
Out L
P31
61
O
A9
A9
Out L
P32
60
O
A10
A10
Out L
P33
59
O
A11
A11
Out L
P34
58
O
A12
A12
Out L
P35
57
O
A13
A13
Out L
P36
56
O
A14
A14
Out L
P37
55
O
A15
A15
Out L
P40
54
O
A16
A16
Out L
P41
53
O
A17
A17
Out L
P42
52
O
A18
A18
Out L
P43
51
O
A19
A19
Out L
P44
50
O
/CS0
/CS0
Out L
P45
49
O
/CS1
/CS1
Out H
P46
48
O
/CS2
/CS2
Out H
P47
47
O
/CS3
/CS3
Out L
P50
46
O
/WR
/WR
Out L
P51
45
O
/BHE
(NU)
Out L
P52
44
O
/RD
/RD
Out L
P53
43
O
BCLK
BCLK
Out L
P54
42
O
/HLDA
(NU)
Out L
P55
41
I
/HOLD
/HOLD
In
P56
40
O
ALE
(NU)
Out L
P57
39
I
/RDY
/RDY
In
P60
38
O
/RTS0
/RS2
H
In
RS-232 /RS2
P61
37
O
CLK0 DRAWER1
L
Out L
DRAWER 1
DRIVE SIGNAL
DRIVE SIGNAL
P62
36
I
RXD0
RD2
In
RS-232 RD2
P63
35
O
TXD0
SD2
H
In
RS-232 SD2
P64
34
O
/RTS1
/RS1
H
In
RS-232 /RS1
P65
33
O
P65
/EFTRES
H
Out L
EFT RESET
SIGNAL
SIGNAL
P66
32
I
RXD1
RD1
In
RS-232 RD1
P67
31
O
TXD1
SD1
H
In
RS-232 SD1
P70
30
O
TXD2
SO
L
Out L
PRINTER DATA
OUT
OUT
P71
29
I
RXD2
SI
In
PRINTER DATA
IN
IN
P72
28
O
CLK2
PCLK
L
Out L
PRINTER
CLOCK
CLOCK
P73
27
O
P73
DRAWER2
L
Out L
DRAWER 2
DRIVE SIGNAL
DRIVE SIGNAL
P74
26
O
P74
/ER1
H
In
RS-232 /ER1
P75
25
I
P75
/CD1
In
RS-232 /CD1
P76
24
I
P76
/CS1
In
RS-232 /CS1
P77
23
I
P77
/DR1
In
RS-232 /DR1
P80
22
O
P80
BUZZER
L
Out L
P81
21
O
P81
VHCOM
L
In
PRINTER HEAD
CONTROL
CONTROL
P82
20
I
/NIT0
POFF
In
P83
19
I
P83
/EFTC
In
EFT PWB connect
P84
18
O
P84
/ER2
H
In
RS-232 /ER2
P85
17
I
/NMI
/NMI (NU)
In
P86
11
O XCOUT
XCOUT
32.768kHz
P87
10
I
XCIN
XCIN
32.768kHz
P90
7
I
P90
MODE
In
MODE KEY
SENSE
SENSE
P91
6
I
P91
MSENS
In
MISCELLA-
NEOUS SENSE
NEOUS SENSE
P92
5
O
P92
BA1
L
Out L
BANK 1 SIGNAL
P93
4
O
P93
BA0
L
Out L
BANK 0 SIGNAL
P94
3
O
P94
DATA/CE
L
Out L
LCD DATA
LATCH SIGNAL
LATCH SIGNAL
P95
2
O
P95
BLON
L
Out L
BACK LIGHT ON
PORT
PIN
No.
I/O
Pin
name
Signal
name
Initial
value
value
OFF
MODE
Function
ER-A410/ER-A420
HARDWARE DESCRIPTION
– 9 –
POWER SUPPLY/CONTROL PINS
4. PRINTER CONTROL
The PR-45M printer is used.
4-1. STEPPING MOTOR CONTROL
The stepping motor is driven at a constant voltage by Sanken STA471A.
1step: 0.125mm, 1dot: 1step
Printing speed: 50mm/s
<CPU’s PORT>
<DRIVING STEP>
RECEIPT MOTOR
*
When the motor is at rest, the same phase as the final excitation
phase is RUSH energized for 10 ms to turn off all phases.
3
Turn all AS~RDS and JAS~JDS into L.
No energizing should be allowed at least 30 ms after stopping the
motor before restarting.
When starting the motor, the first excitation phase is RUSH energized
When starting the motor, the first excitation phase is RUSH energized
for 10 ms to start the motor by acceleration control.
P96
1
O
P96
LCDON
L
Out L
LCD POWER ON
P97
100
I
P97
IPLON
In
IPL ON SIGNAL
P100
97
I
AN0
TM
In
HEAD TEMPERA-
TURE MONITOR
TURE MONITOR
P101
95
I
AN1
VPTEST
In
HEAD VOLT-
AGE MONITOR
AGE MONITOR
P102
94
I
AN2
VREF
In
REFERENCE
VOLTAGE
VOLTAGE
P103
93
O
AN3
/STRB1
H
In
PRINTER STORE
SIGNAL 1
SIGNAL 1
P104
92
O
AN4
/STRB2
H
In
PRINTER STORE
SIGNAL 2
SIGNAL 2
P105
91
O
P105
/STRB3
H
In
PRINTER STORE
SIGNAL 3
SIGNAL 3
P106
90
O
P106
/STRB4
H
In
PRINTER STORE
SIGNAL 4
SIGNAL 4
P107
89
O
P107
LATCH
L
In
PRINTER
LATCH SIGNAL
LATCH SIGNAL
PORT
PIN No.
I/O
PIN NAME
FUNCTION
BYTE
8
I
BYTE
Connected to VDD
CNVSS
9
I
CNVSS
Connected to GND
/RESET
12
I
/RESET
XOUT
13
O
XOUT
OPEN
VSS
14
VSS
Connected to GND
XIN
15
I
XIN
Connected to Spectram
VCC
16
VCC
Connected to VDD
VCC
62
VCC
Connected to VDD
VSS
64
VSS
Connected to GND
AVSS
96
AVSS
Connected to GND
VREF
98
VREF
Connected to VDD
AVCC
99
AVCC
Connected to VDD
PORT
PIN
No.
I/O
Pin
name
Signal
name
Initial
value
value
OFF
MODE
Function
No.
CPU PORT
Signal to be used
80
P10
RAS
79
P11
RBS
78
P12
RCS
77
P13
RDS
76
P14
JAS
75
P15
JBS
74
P16
JCS
73
P17
JDS
Driver IC input (CPU output)
Motor drive signal
STEP
RAS
RBS
RCS
RDS
/RPFA /RPFB /RPFC /RPFD
1
H
L
L
H
L
H
H
L
2
L
H
L
H
H
L
H
L
3
L
H
H
L
H
L
L
H
4
H
L
H
L
L
H
L
H
Driver IC input (CPU output)
Motor drive signal
STEP
JAS
JBS
JCS
JDS
/JPFA
/JPFB
/JPFC
/JPFD
1
L
H
H
L
H
L
L
H
2
L
H
L
H
H
L
H
L
3
H
L
L
H
L
H
H
L
4
H
L
H
L
L
H
L
H
ER-A410/ER-A420
HARDWARE DESCRIPTION
– 10 –
4-2. HEAD CONTROL
HEAD: 864 dots in all Printable range
RECEIPT side 384 dots
JOURNAL side 384 dots
Related PORT
*
When turning off the printer power supply, make sure to turn
/STB1,2,3,4 to “H.”
*
Do not turn on without paper.
*
THERMAL HEAD power supply control: Turn ON when P81 = ”H”;
turn OFF when at “L.” (The power supply for HEAD and STEPPING
MOTOR is shared.) When printing is finished, (when the motor is
MOTOR is shared.) When printing is finished, (when the motor is
stopped), the power should be turned off.
*
Before printing or feeding paper, perform A/D conversion in 10 ms
after the printer head is turned on and make sure the voltage is sta-
ble.
ble.
5. A/D CONVERSION
The following three kinds of signals are inputted to the A/D conversion
port of the ER-A410/420.
<CPU’s PORT>
5-1. PRINTER HEAD TEMPERATURE MONITOR
The voltage divided by the resistor and the thermistor for detecting the
temperature of the printer head is inputted to AN0 pin. As shown below,
temperature of the printer head is inputted to AN0 pin. As shown below,
the printer head energizing is controlled.
5-2. PRITER HEAD VOLTAGE MONITOR
A voltage is supplied by the printer head power supply, passed through
the printer, divided by the resistor, and inputted to AN1 pin. Before
reading the A/D conversion value, turn the VHCOM signal (CPU P81) to
“H” and make sure the voltage is stable. Then read the A/D conversion
“H” and make sure the voltage is stable. Then read the A/D conversion
value.
The printable voltage range for the printer is 15V~26V. The voltage is
calculated from the AN1 value and the A/D conversion value of the ref-
erence voltage of AN2.
erence voltage of AN2.
5-3. REFERENCE VOLTAGE
The reference voltage (2.495V
m
0.085V) generated by KIA431F is input-
ted to AN2 pin.
469 (DEC)
t
VREF
t
557 (DEC)
VREF 469 (DEC) corresponds to VREF = 2.41V at VCC = 5.25V
VREF 557 (DEC) corresponds to VREF = 2.58V at VCC = 4.75V
No.
CPU PORT
Signal to be used
30
TXD2
SO
29
RXD2
SI
28
CLK2
PCLK
93
P103
/STRB1
92
P104
/STRB2
91
P105
/STRB3
90
P106
/STRB4
89
P107
LATCH
21
P81
VHCOM
/STB1: 1~288dot: 288 dots in all
/STB2: 289~432dot: 144 dots in all
/STB3: 433~576dot: 144 dots in all
/STB4: 577~864dot: 288 dots in all
Total 864 dots
No.
CPU PORT
Signal to
be used
Function
97
AN0
TM
PRINTER HEAD TEMPERATURE
MONITOR
MONITOR
95
AN1
VPTEST
PRINTER HEAD VOLTAGE MONI-
TOR
TOR
94
AN2
VREF
REFERENCE VOLTAGE
HEAD
TEMPERATURE
A/D CONVERSION
VALUE (DEC)
OPERATION
-10°C or below
929~1023
MOTOR LOCK
-10°C ~ 0°C
869~928
PRINT IN ENERGIZING
TIME AT 0°C
TIME AT 0°C
0°C ~ 70°C
232~868
PRINT IN ENERGIZING
TIME SHOWN IN PR-45
CONTROL SPEC
TIME SHOWN IN PR-45
CONTROL SPEC
70°C or above
0~231
MOTOR LOCK
Click on the first or last page to see other ER-A410 / ER-A420 (serv.man3) service manuals if exist.