Sharp ER-A410 User manual

CODE : 00Z
qSERVICE MANUAL
CONTENTS
Parts marked with "!" are important for maintaining the safety of the set. Be sure to replace these parts with specified
ones for maintaining the safety and performance of the set.
SHARP CORPORATION This document has been published to be used
for after sales service only.
The contents are subject to change withoutnotice.
ERA410VSME
ELECTRONIC
CASH REGISTER
ER-A410
MODEL ER-A420
SRV KEY : LKGIM7113RCZZ
PRINTER : PR-45MII
(V version)
CHAPTER 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CHAPTER 3. MASTER RESET AND PROGRAM RESET. . . . . . . . . 6
CHAPTER 4. HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . 7
CHAPTER 5. DIAGNOSTIC PROGRAM . . . . . . . . . . . . . . . . . . . . . 15
CHAPTER 6. IPL FROM EP-ROM . . . . . . . . . . . . . . . . . . . . . . . . . . 20
CHAPTER 7. CIRCUIT DIAGRAM AND PWB LAYOUT . . . . . . . . . 21
ER-A410
ER-A420
PARTS GUIDE

ER-A410/ER-A420
CAUTION
RISK OF EXPLOSION IF BATTERY IS REPLACED
BY AN INCORRECT TYPE.
DISPOSE OF USED BATTERIES ACCORDING
TO THE INSTRUCTIONS.
IF THE MODE SW IS SET TO THE SRV' POSITION
WHEN THE POWER IS OFF,
THE MACHINE WILL NOT OPERATE PROPERLY EVEN T
HOUGH THE POWER IS TURNED ON.
DO NOT SET THE MODE SW TO THE SRV' POSITION
WHEN THE POWER IS OFF.

ER-A410/ER-A420 SPECIFICATIONS
– 1 –
CHAPTER 1. SPECIFICATIONS
1. APPEARANCE
ER-A410
ER-A420
2. RATING
3. KEYBOARD
3-1. KEYBOARD LAYOUT
ER-A410
ER-A420
3-2. KEY LAYOUT
ER-A410 KEYLAYOUT
Note: All the keys but the receipt paper feed and journal paper feed
keys can be re-positioned.
If you want to change the layout, consult your dealer.
■
■■
■Key names
ER-A410/420
Weight ER-A410: 12.2kg
ER-A420: 12.1kg
Dimensions 355 (W) x 424 (D) x 305 (H) mm
Power source 220~230V (m10%), 50/60Hz
230~240V (m10%), 50Hz
Power consumption Stand-by 11W, Operating 49W (max.)
Working temperature 0°C~40°C (32°F to 104°F)
Type Normal keyboard
Key stroke 3.5 m0.5 mm
Key pitch 19 (W) x 19 (H) mm
Type Flat key
Key stroke 1.1 m0.2 mm
Key pitch 18 (W) x 15 (H) mm
Front view Rear view
Printer cover
Receipt paper
Journalwindow
Keyboard
Drawer lock
Drawer
Customer display
(Pop-uptype)
Operator
display
Mode switch
RS-232Cconnector
Printer cover
Receipt paper
Journalwindow
Keyboard
Drawer lock
Drawer
Customer display
(Pop-uptype)
Operator
display
Mode switch
RS-232Cconnector
Front view Rear view 2RECEIPT Receipt paper feed key
2JOURNAL Journal paper feed key
0 ~ 9, 00 Numeric keys
• Decimal point key
yMultiplication key
CL Clear key
1 ~ 20 Department keys
PLU/SUB Price lookup/subdepartment key
AMT Amount entry key
VAT Value added tax key
CASH # Cashier code entry key
-Discount key
% Percent key
EX1, EX2 Foreign currency exchange 1 and 2 keys
CR1, CR2 Credit 1 and 2 keys
CH1, CH2 Cheque 1 and 2 keys
ST Subtotal key
TL Total (cash total) key
pVoid key
RF Refund key
RA Received-on-account key
PO Paid-out key
DEPT # Department code entry key
# Non-add code key
NS No-sale key
DIFFER ST Difference subtotal key
RCPT Receipt print key
AUTO Automatic sequencing key
1
4
3
2
5
11
12
13
14
15
16
17
18
19
20
0
123
456
789
CL
00
CH1
RCPT
6
7
8
9
10
%
RAPO
RF
#
CASH
#
CR1
CH2
CR2
TL
ST
DEPT
#
EX2
EX1
AMT AUTO
PLU/SUB
RECEIPT JOURNAL
NSVAT
DIFFER
ST

ER-A410/ER-A420 SPECIFICATIONS
– 2 –
■
■■
■Optional keys
Note: The department and direct PLU keys can be extended, if you
require extension of the department or direct PLU keys, please
contact your dealer.
ER-A420 KEYLAYOUT
Note: All the keys but the receipt paper feed and journal paper feed
keys can be re-positioned.
If you want to change the layout, consult your dealer.
■
■■
■Key names
■
■■
■Optional keys
Note: The department and direct PLU keys can be extended, if you
require extension of the department or direct PLU keys, please
contact your dealer.
SLIP Slip print key
%2 ~ %4 Percent 2 through 4 keys
AUTO 2 ~ AUTO 5 Automatic sequencing 2 through 5 keys
CA2 Cash total 2 key
CR3, CR4 Credit 3 and 4 keys
RA2 Received-on-account 2 key
PO2 Paid-out 2 key
VAT SHIFT Value added tax shift key
VP Validation print key
CLERK # Clerk code entry key
GC COPY Guest check copy key
PBLU Previous balance lookup key
NBAL New balance key
FINAL Final key
DEPO (+) Deposit entry key
DEPO (-) Deposit refund key
GC RCPT Guest check receipt key
CHK PRINT Check print key
1/2Half penny key
L1 ~ L3 PLU level shift 1 through 3 keys
PRICE SHIFT Price level shift key
-2 ~ -4 Discount 2 through 4 keys
CH3, CH4 Cheque 3 and 4 keys
EX3, EX4 Foreign currency exchange 3 and 4 keys
000 Triple zero entry key
2RECEIPT Receipt paper feed key
2JOURNAL Journal paper feed key
0 ~ 9, 00, 000 Numeric keys
• Decimal point key
yMultiplication key
CL Clear key
1 ~ 6 Department keys
PLU/SUB Price lookup/subdepartment key
1
4
3
2
5
15
16
17
18
19
22
23
24
25
26
0
123
456
789
CL
00 8
9
10
11
12
%
RA
PO
RF
CASH
#
CR1
CR2
ST
GC
COPY
AMT
PLU
SUB
NS
VAT
RCPT
RECEIPT JOURNAL
000
3
4
5
6
1
2
L1
L2
TL
CH
EX
L3
PRICE
SHIFT
6
7
20
21
27
28
13
14
29
32
31
30
33
43
44
45
46
47
50
51
52
53
54
36
37
38
39
40
34
35
48
49
55
56
41
42
57
58
59
60
61
64
65
66
67
68
62
63
69
70
#
AUTO
DEPT
#
AMT Amount entry key
VAT Value added tax key
CASH # Cashier code entry key
-Discount key
DEPT # Department code entry key
% Percent key
L1 ~ L3 PLU level shift 1 through 3 keys
CR1, CR2 Credit 1 and 2 keys
CH Cheque key
ST Subtotal key
TL Total (cash total) key
pVoid key
RF Refund key
RA Received-on-account key
PO Paid-out key
GC COPY Guest check copy key
EX Foreign currency exchange key
PRICE SHIFT Price level shift key
NS No-sale key
# Non-add code key
RCPT Receipt print key
AUTO Automatic sequencing key
1 ~ 70 Direct price lookup keys
SLIP Slip print key
%2 ~ %4 Percent 2 through 4 keys
AUTO 2 ~ AUTO 5 Automatic sequencing 2 through 5 keys
CA2 Cash total 2 key
CR3, CR4 Credit 3 and 4 keys
RA2 Received-on-account 2 key
PO2 Paid-out 2 key
VAT SHIFT Value added tax shift key
DIFFER ST Difference subtotal key
CLERK # Clerk code entry key
VP Validation print key
PBLU Previous balance lookup key
NBAL New balance key
FINAL Final key
DEPO (+) Deposit entry key
DEPO (-) Deposit refund key
GC RCPT Guest check receipt key
CHK PRINT Check print key
1/2Half penny key
-2 ~ -4 Discount 2 through 4 keys
CH2 ~ CH4 Cheque 2 through 4 keys
EX2 ~ EX4 Foreign currency exchange 2 through 4 keys

ER-A410/ER-A420 SPECIFICATIONS
– 3 –
4. MODE SWITCH
4-1. MODE SWITCH AND MODE KEYS
The mode switch has these settings:
5. DISPLAY
5-1. OPERATOR DISPLAY
Layout:
5-2. CUSTOMER DISPLAY
Layout:
:This mode locks all register operations.
No change occurs to register data.
OP X/Z: This setting allows cashiers/clerks to take X or Z reports for
their sales information. (This setting may be used only when
your register has been programmed for “OP X/Z mode avail-
able” in the PGM2 mode.)
REG: For entering sales
PGM1: To program those items that need to be changed often: e.g.,
unit prices of departments, PLUs or EANs, and percentages
PGM2: To program all PGM1 items and those items that do not
require frequent changes: e.g., date, time, or a variety of reg-
ister functions
MGR: For manager’s and submanager’s entries
The manager can use this mode to make entries that are not
permitted to be made by cashiers -for example, after-transac-
tion voiding and override entry.
X1/Z1: To take the X/Z report for various daily totals
X2/Z2: To take the X/Z report for various periodic (weekly or monthly)
consolidation
REG
OP
X / Z
MGR
X
1
/Z
1
X 2 /Z 2
PGM 1
PGM 2
SRV SRV'
SRV
MA
SM
MA SM SRV
• Manager key (MA) • Submanager key (SM)
• Service key (SRV)
OP
• Operator key (OP)
Display device: LCD
Number of line: 2 line
Number of positions: 16 positions
Color of display: Yellow / Green
Character font: 5 x 7 dot
Character size: 4.84 (W) x 8.06 (H) mm
Display device: LED
Number of line: 1 line
Number of positions: 7 positions
Color of display: Yellow / Green
Style: Pop up type
Character form: 7 segment + Dp
Character size: 14.2mm (H) x 7.9mm (W)

ER-A410/ER-A420 SPECIFICATIONS
– 4 –
■
■■
■Operator display
The operator display consists of a 2-line LCD dot-matrix display (16
characters/line).
• Cashier/clerk code or mode name
The mode you are in is displayed. When a cashier/clerk is
assigned, the corresponding cashier/clerkcode is displayed in
the REG or OP X/Z mode. For example, “0001” is displayed
when cashier 0001 is assigned.
• Repeat
The number of repeats is displayed, starting at “2” and incremen-
tal with each repeat. When you have registered ten times, the
display will show “0”. (2 33......9 30 31 32...)
• Sentinel mark
When the amount in the drawer reaches the amount you prepro-
grammed, the sentinel mark “X” is displayed to advice you to
remove the money to a safe place.
• Power save mark
When the cash register goes into the power save mode, the
power save mark (decimal point) is displayed.
• Stock alarm indicator
When the stock of the PLU which you entered is zero or nega-
tive, the alarm indicator (decimal point) is displayed.
• Function message display area
Item labels of departments and PLU/subdepartments and func-
tion texts you use, such as %1, (–) and CASH are displayed
here. For the details of function texts.
When an amount is to be entered or entered, “AMOUNT” is dis-
played: When an amount is to be entered, – – – – – – – is dis-
played in the numeric entry display area with “AMOUNT”. When
a preset price has been set, the price is displayed in the numeric
entry display area with “AMOUNT”.
• Numeric entry display area
Numbers entered using numeric keys are displayed here.
Date and time display
Date and time appear on the display in the OP X/Z, REG, or MGR
mode. In the REG or MGR mode, press the [#] key to display the date
and time.
Error message
When an error occurs, the corresponding error message is displayed
in the function message display area.
■
■■
■Customer display (Pop-up type)
6. PRINTER
6-1. PRINTER
6-2. PAPER
6-3. LOGO STAMP
• No
6-4. CUTTER
• Method: Manual
Function message
displayarea
Cashier
/ clerkcode or
mode name
Numeric entry
displayarea
Receipt OFF indicator("_")
/ Stockalarm indicator(" ")
Repeat / Sentinelmark / Powersave mark
Dept.name
/ PLU name /
function text
Price level
/ PLU level
(e.g.P2L3)
Power save mark(This markappears only inthe power save mode)
• Part number: PR-45MII (PR-45M compatible)
• NO. of station: 2 (Receipt and journal)
• Validation: No
• Printing system: Line thermal
• No. of dot: Receipt 288 dots
• Journal 288 dots
• Dot pitch: Horizontal 0.125mm
Vertical 0.125mm
• Font: font A: 12 dots x 24 dots
font B: 9 dots x 24dots
• Printing capacity: Receipt max. 24 characters
Journal max. 24 characters
• Character size: 1.5mm (W) x 3.0mm (H) at 12 x 24 dots
1.125mm (W) x 3.0mm (H) at 9 x 24 dots
• Print pitch: Column distance 1.5mm at 12 dots
1.125mm at 9 dots
Row distance 3.75mm
• Print speed: Approximate 50mm/s
• Paper feed speed:
(Manual feed) Approximate 40mm/s
• Reliability: Mechanism MCBF 5 million lines
• Paper end sensor: Set up (Receipt and journal)
• Cutter: Manual
• Near end sensor: No
Note : PR-45MII is minor change model of the PR-45M.
This printer is not set gear cover (GCOVH7146BHZZ) from PR-
45M only.
• Paper roll dimension: 44.5 m0.5mm in width
Max. 83mm in diameter
• Paper quality: (Journal/Receipt)
High-quality paper
paper thickness: 0.06 to 0.08mm

ER-A410/ER-A420 OPTIONS
– 5 –
7. DRAWER
[OUTLINE]
• Standard equipment: Yes
• Max. number of additional drawers: 1
• The drawer consists of:
1) Drawer box (outer case) and drawer
2) Money case
3) Lock (attached to the drawer)
[SPECIFICATION]
7-1. DRAWER BOX AND DRAWER
7-2. MONEY CASE
7-3. LOCK (LOCK KEY: LKGIM7331BHZZ)
• Location of the lock: Front
• Method of locking and unlocking:
CHAPTER 2. OPTIONS
1. OPTIONS
2. SERVICE OPTIONS
Model name of the drawer
box SK420
Size 355 (W) x 424 (D) x 120 (H) mm
color Gray 368
Material Metal
Bell –
Release lever Standard equipment: situated at the bot-
tom
Drawer open sensor YES
Separation from the drawer Allowed
Separation of the bill compartments from the coin
compartments Allowed
Bill separator Disallowed
Number of compartments 5B/8C
To lock, insert the drawer lock key into the lock and turn
it 90 degrees counter clockwise.
To unlock, insert the drawer lock key and turn it 90
degrees clockwise.
Key No: SK1-1
5B/8C
SK1-1
L
o
c
k
u
n
l
o
c
k
NO CLASSIFICATION COMPONENT NAME MODEL NAME REMARK
1 Drawer Remote drawer ER-03DW
ER-04DW
ER-05DW
ER-06DW
2 EFT function EFT terminal I/F ER-03EF
3 Key kit 1 x 1 key top kit ER-11KT7
1 x 2 key top kit ER-12KT7
2 x 2 key top kit ER-22KT7
1 x 1 dummy key kit ER-11DK7G
5 x 1 dummy key kit ER-51DK7G
NO NAME PARTS CODE PRICE RANK REMARK
1SRVkey LKGIM7113RCZZ AK
2 Water proof switch cover GCOVH2541BHZB AY
3 Water proof keyboard cover GCOVH2541BHZA BC For ER-A410
4 Text preset key cover GCOVH2541BHSA BD For ER-A410
5 Blank sheet PSHEK3008BHZZ AL For ER-A420

ER-A410/ER-A420 MASTER RESET AND PROGRAM RESET
– 6 –
3. SUPPLIES
4. SPECIAL SERVICE TOOLS
CHAPTER 3. MASTER RESET AND PROGRAM RESET
The SRV key is used for operating in the SRV mode.
MASTER RESET clears the entire memory and resumes initial values.
PROGRAM RESET resumes the initial program without clearing mem-
ory.
There are 2 kind of MASTER RESET.
1. MASTER RESET 1
“Procedure A” or “Procedure B”
Procedure A: 1) Set the mode switch to the (SRV’) position.
2) Plug in the AC cord to the wall outlet.
3) While holding down the JOURNAL FEED key, turn
the mode switch to (SRV) position from (SRV’) posi-
tion.
Procedure B: 1) Unplug the AC cord from the wall outlet.
2) Set the mode switch to the (SRV) position.
3) While holding down the JOURNAL FEED key, plug in
the AC cord to the wall outlet.
Note: Procedure B cannot reset the hardware.
It must be operated “Procedure A” to reset the hardware.
2. MASTER RESET 2
“Procedure A” or “Procedure B”
Procedure A: 1) Set the mode switch to the (SRV’) position.
2) Plug in the AC cord to the wall outlet.
3) While holding down the JOURNAL FEED key & the
RECEIPT FEED key, turn the mode switch to (SRV)
position from (SRV’) position.
4) Program [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [00] [000] [.]
[CL] [x] [ST] [TL] keys by depressing in this order.
Procedure B: 1) Unplug the AC cord from the wall outlet.
2) Set the mode switch to the (SRV) position.
3) While holding down the JOURNAL FEED key & the
RECEIPT FEED key, plug in the AC cord to the wall
outlet.
4) Same as “Procedure A”
Note: Procedure B cannot reset the hardware.
It must be operated “Procedure A” to reset the hardware.
3. PROGRAM RESET
“Procedure A”, “Procedure B” or “Procedure C”
Procedure A: 1) Set the mode switch to the (SRV’) position.
2) Plug in the AC cord to the wall outlet.
3) Without pressing the JOURNAL FEED key, turn the
mode switch to (SRV) position from (SRV’) position.
Procedure B: 1) Unplug the AC cord from the wall outlet.
2) Set the mode switch to the (SRV) position.
3) Without pressing the JOURNAL FEED key, plug in
the AC cord from the wall outlet.
Procedure C: 1) Unplug the AC cord from the wall outlet.
2) Set the mode switch to the PGM2 position.
3) While holding down the JOURNAL FEED key & the
RECEIPT FEED key, plug in the AC cord to the wall
outlet.
*“Procedure C” can be done when SRV#916_B_+4: PROGRAM
RESET in PGM2 = ENABLE.
Note: Procedure B and C cannot reset the hardware.
It must be operated “Procedure A” to reset the hardware.
NO NAME PARTS CODE PRICE
RANK DESCRIPTION
1 Thermal roll paper TPAPR6645RC05 BA 5 ROLLS/PACK
NO NAME PARTS CODE PRICE
RANK DESCRIPTION
1 RS-232 Loop-back connector UKOG-6705RCZZ BU
MASTER RESET 1: Normal MASTER RESET
It clears the entire memory and resumes initial
values.
MASTER RESET 2: It enables the layout of fixed keys in addition to
MASTER RESET 1.
Fixed keys: [0] [1] [2] [3] [4] [5] [6] [7] [8] [9]
[00] [000] [.] [CL] [x] [ST] [TL]
Note: If [000] key is not required, press the same key
in the next step, and [000] key will be inhibited.

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)
EXTERNAL MEMORY
RAM 512KB
FLASH ROM 512KB
SHARP LH28F004BVT
CGROM 1MB (JAPAN ONLY)
PRINTER
PR45MII
POWER
SUPPLY
CPU
RAM 10KB
DRAWER 1
DRAWER 2
RAM CGROM
512KB 1MB
DRIVER,SENSOR
PRINTER
EFTI/F BOARD
(option)
MUX
RS232C CH1
RS232C CH2
KEY &SW
KEY SCAN
KEY RETURN
4to 16
DECODER
SEGDRIVER
DIGDRIVER
LCD
16DIGITS
x2LINES
POPUP
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)
FLASHROM
Lower 256KB
FLASHROM
Lower 256KB
IPLSW
OFF:Flash ROM
ON: EPRPM
IPLSW
OFF:EPROM
ON: Flash RPM
CG ROM
512KB
(Upper level)
External SRAM 2
32KB External SRAM 3 32KB
External SRAM 1
128KB
Internal reservedarea
External I/O
Even if the bankischanged,the same
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 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
P11 79 O P11 RBS L Out L RECEIPT
PAPER FEED B
P12 78 O P12 RCS L Out L RECEIPT
PAPER FEED C
P13 77 O P13 RDS L Out L RECEIPT
PAPER FEED D
P14 76 O P14 JAS L Out L JOURNAL
PAPER FEED A
P15 75 O P15 JBS L Out L JOURNAL
PAPER FEED B
P16 74 O P16 JCS L Out L JOURNAL
PAPER FEED C
P17 73 O P17 JDS L Out L JOURNAL
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 HIn RS-232 /RS2
P61 37 O CLK0
DRAWER1 LOut L DRAWER 1
DRIVE SIGNAL
P62 36 I RXD0 RD2 In RS-232 RD2
P63 35 O TXD0 SD2 HIn RS-232 SD2
P64 34 O /RTS1 /RS1 H In RS-232 /RS1
P65 33 O P65 /EFTRES HOut L EFT RESET
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
P71 29 I RXD2 SI In PRINTER DATA
IN
P72 28 O CLK2 PCLK L Out L PRINTER
CLOCK
P73 27 O P73
DRAWER2 L Out L DRAWER 2
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
P82 20 I /NIT0 POFF In
P83 19 I P83 /EFTC In
EFT PWB connect
P84 18 O P84 /ER2 HIn 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
P91 6 I P91 MSENS In MISCELLA-
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
P95 2 O P95 BLON L Out L BACK LIGHT ON
PORT PIN
No. I/O Pin
name Signal name Initial 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.
3Turn 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
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
P101 95 I AN1 VPTEST In HEAD VOLT-
AGE MONITOR
P102 94 I AN2 VREF In REFERENCE
VOLTAGE
P103 93 O AN3 /STRB1 H In
PRINTERSTORE
SIGNAL 1
P104 92 O AN4 /STRB2 H In PRINTERSTORE
SIGNAL 2
P105 91 O P105 /STRB3 H In PRINTERSTORE
SIGNAL 3
P106 90 O P106 /STRB4 H In PRINTERSTORE
SIGNAL 4
P107 89 O P107 LATCH L In PRINTER
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 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
1HLLHL H H L
2LHLHH L H L
3LHHLH L L H
4HLHL L H L H
Driver IC input (CPU output) Motor drive signal
STEP JAS JBS JCS JDS /JPFA /JPFB /JPFC /JPFD
1LHHLH L L H
2LHLHH L H L
3HLLHL H H L
4HLHL 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
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.
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,
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
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.
5-3. REFERENCE VOLTAGE
The reference voltage (2.495Vm0.085V) generated by KIA431F is input-
ted to AN2 pin.
469 (DEC) tVREF t557 (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
95 AN1 VPTEST PRINTER HEAD VOLTAGE MONI-
TOR
94 AN2 VREF REFERENCE VOLTAGE
HEAD
TEMPERATURE A/DCONVERSION VALUE (DEC) OPERATION
-10°C or below 929~1023 MOTOR LOCK
-10°C ~ 0°C 869~928 PRINT IN ENERGIZING
TIME AT 0°C
0°C ~ 70°C 232~868 PRINT IN ENERGIZING
TIME SHOWN IN PR-45
CONTROL SPEC
70°C or above 0~231 MOTOR LOCK

ER-A410/ER-A420 HARDWARE DESCRIPTION
– 11 –
6. KEY/DISPLAY
6-1. LCD CONTROL
The LCD control is the same as that of the ER-A275P.
LCD-related Register
<LCD Control Signal/Key Strobe Signal>
<Data Latch Signal> P94
L: LCD write data latch
6-2. KEY/DISPLAY SCAN
On A410/420, the key and display scan signal is common.
Key/display scan and key read are performed at the following timing.
1Key/display scan cycle: 10ms
2Blanking time: 50us
3KEY DATA READ timing: 10 ~100us before turning off the strobe
signal
KEY DATA are read in two divisions by switching the exchange sig-
nal.
Key/Display-related Register
<LED Segment Signal> Write
<LCD Control Signal/Key Strobe Signal> Write
Bit3~0: KS3~0
At KS3~0, the strobe signals of KEY and POP UP Display are gener-
ated.
<Key Return Signal, Key Exchange Signal> Read Flat Keyboard
<Key Return Signal> Read Normal Keyboard
<Key Select Signal>
READ is performed at the timing of ST9 of CPU port P90 (Refer to 6-3.)
1: NORMAL KEY
0: FLAT KEY
The flat keyboard switches the key exchange signal and takes key data
in two times. For the reading timing, refer to the timing chart below.
The normal keyboard reads key data 10~100us before turning off the
strobe signal of the keyboard.
Function Address R/W
LCD Write Data 04001h W
LCD Read Data 04002h R
LCD Control Signal / Key Strobe Signal 04003h W
Data Latch Signal CPU port P94 W
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04003h – E R/W RS KS3 KS2 KS1 KS0
Bit7: Not used
Bit6: E
Enable Signal Enable
Bit5: R/W
H: Data read L: Data Write
Bit4: RS
H: Data input L: Instruction Input
RS
R/W
E
DB0-7
P94
DATA WRITE(CPU 3LCD)
Valid Data
4003h
000xxxxx
WRITE
4001h
DATA
WRITE
4003h
010xxxxx
WRITE
4003h
000xxxxx
WRITE
4003h
001xxxxx
WRITE
RS
R/W
E
DB0-7
P94
DATA READ(CPU 1LCD)
Valid Data
4003h
001xxxxx
WRITE
4003h
001xxxxx
WRITE
CPU
P94
HIGH
4003h
011xxxxx
WRITE
4002h
DATA
READ
4003h
001xxxxx
WRITE
CPU
P94
LOW
Function Address R/W
LED Segment Signal 04000h W
LCD Control Signal / Key Strobe Signal 04003h W
Key Return Signal 04003h R
Key Exchange Signal 04003h Bit7 W
Key Select Signal CPU port P90 R
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04000h dp g f e d c B a
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04003h X E R/W RS KS3 KS2 KS1 KS0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04001h X X X X KR11 KR10 KR9 KR8
04003h KR7 KR6 KR5 KR4 KR3 KR2 KR1 KR0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04003h KR7 KR6 KR5 KR4 KR3 KR2 KR1 KR0
950m25us 50m5us
Max. 10us
10~100us
Fh Fh Fh
BLANK BLANKBLANK
1ST DIGIT
DISPLAYDATA2NDDIGIT DISPLAYDATA1ST DIGIT DISPLAYDATA
0190
KS0~3
LEDSegment
Signal
KeyReturn
Signal

ER-A410/ER-A420 HARDWARE DESCRIPTION
– 12 –
6-3. OTHERS
The MODE key switch and other sensor signals are read with the CPU
port P90 and 91 at the keyboard strobe timing. Reading is performed
10~100us before turning off the strobe signal.
6-4. DISPLAY
The ER-A410/A420 is provided with the front LCD of 5 x 7dot, 2 lines 16
digits, and the 7-digit LED on the pop up side.
FRONT:
POP UP:
• DISPLAY DIGIT SIGNAL
The above ST0~ST6 are DIGIT signals.
ST0: 1st digit~ST6:7th digit
• DISPLAY SEGMENT SIGNAL (REFER TO 6-2.)
By writing segment data to 4000h, the LED segment signal can be
outputted.
DATA~SEGMENT correspondence
7. EFT I/F
The ER-A410/A420 can be connected with the EFT I/F PWB as an
option.
The EFT I/F is mapped in the /CS3 area.
By inserting the EFT PWB, the RS-232 CH2 signal is switched to the
signal from the EFT.
Since, however, the reception data (RTX) of RS232 CH2 is inputted to
the CPU without being cut, the CPU port must be set so that the input
can be received without problems. The EFT PWB unit is common
except for the EFT section of the ER-01EF and the I/O address from the
HOST.
7-1. EFT I/F
X: Not fixed (EFT 3ECR just before)
1Data read of SUB CPU 1: Not reading 0: Reading
2Data to SUB CPU 1: YES 0: NO
3Data to HOST CPU 1: YES 0: NO
EFT RESET
RESET signal to initialize the EFT I/F.
After resetting the machine, /EFTRST is outputted at LOW for more
than 10µsec.
During LOW period, the EFT I/F should not be accessed.
EFT CONNECT SIGNAL
EFT I/F connect signal 0: EFT PWB provided 1: EFT PWB not provided
CPU STO ST1 ST2 ST3 ST4 ST5 ST6 ST7 ST8 ST9
MODE P90 SRV PGM VOID OP X/Z REG MGR X1/Z1 X2/Z2 Key Select
OTHERS P91 PF-R PF-J RPE HEAD UP JPE DRAWER
OPEN RS1_CI
P90 ST0 : MODE Key SRV “0” SRV mode
ST1 : MODE Key PGM “0” PGM mode
ST2 : MODE Key VOID “0” VOID mode
ST3 : MODE Key OP X/Z “0” OP X/Z mode
ST4 : MODE Key REG “0” REG mode
ST5 : MODE Key MGR “0” MGR mode
ST6 : MODE Key X1/Z1 “0” X1/Z1 mode
ST7 : MODE Key X2/Z2 “0” X2/Z2 mode
ST9 : Keyboard select “0” Flat key
“1” Normal key
P91 ST0 : Receipt feed “0” Receipt feed
ST1 : Journal feed “0” Journal feed
ST2 : Receipt paper end “1” Receipt paper end
ST3 : Head up “0” Head up
ST4 : Journal paper end “1” Journal paper end
ST6 : Drawer open sensor “0” Drawer open
ST9 : RS-232 ch1 CI signal
D0~D6 3a~g
D7 3DP
HOST CPU
I/O address Name
0400EH DTR Used for data send/receive to/from
the EFT I/F CPU.
(Data register) When WRITE: ECR 3EFT
When READ: EFT 3ECR
READ/WRITE should be per-
formed only when the condition of
NOTE 1 is satisfied.
0400FH STR Used for data send/receive to/from
the EFT I/F CPU.
(Status register) When WRITE: Indicates the EFT I/F
status.
When READ: EFT sub system reset
control
D7 D6 D5 D4 D3 D2 D1 D0
XXXXXCLMIBFOBF
123
NOTE 1) Data write to DTR is performed when “CLM:1/IBF:0.”
Data read from DTR is performed when “OBF:1.”
Pin No. CPU PORT Signal to be used
33 P65 /EFTRST
Pin No. CPU PORT Signal to be used
19 P83 /EFTC

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.
The RS-232 ch1 and ch2 are assigned to the following CPU port and I/
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.
IPL from COM: Data from PC is written through the COM port to
the FLASH ROM. (Max. 38.4kbps)
CPU Ch1 connector
Ch2connector
MUX
EFT I/F PWB
B
AA/B
Y
+5V
Service interruption should be performed
within 10ms after generation of /POFF.
TRANS. LM2574 +TR 24VDRAWER
PRINTER
ON/OFF control
(MODE SW)
PQ1CG2032VLED 5.7V
VCC 5.0V
VDD 5.0V
BATTERY
/POFF detection point

ER-A410/ER-A420 HARDWARE DESCRIPTION
– 14 –
12. PRINT RATIO LIMITATION
Max. 288dot/1line x 140line (Corresponds to black background LOGO
print.)
Ave. 108dot/1line or less (Corresponds to 12.5% of all dots.)
13. BUZZER
A buzzer of piezo type is used.
The oscillation frequency is 4.0kHz m0.5kHz.
14. RESET
The RESET signal is generated under the following condition.
1) When the MODE KEY SWITCH is moved from SRV’ to another
position (except for OFF).
15. POFF
The POFF signal is changed from 0 to 1 when the 5V system power
and the 24V system power reach the operating voltage. When they fall
below the operating voltage, the signal is changed from 1 to 0.
POFF, RESET TIMING CHART
16. I/O
<LED Segment Signal> Write
<Serial I/O ch2 receive signal> Read
<LCD Write Data> Write
<Key Return Signal, Key Exchange Signal> Read
<LCD Read Data> Read
<LCD Control Signal/Key Strobe Signal> Write
<Key Return Signal> Read
<LCD Control Signal/Key Strobe Signal> Write
<EFT Data> Write/Read
<EFT Status> Read
+5V
+24V
/
RESET
/
POFF
/
EFTRES
20.8V
POWER ONInstant service
interruption MODE SRV'MODE Other than
SRV'
POWER OFF
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04000h dp g f e d c B a
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04000h X X X X /CD2 /DR2 /CS2 /CI2
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04001h DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04001h X X X X KR11 KR10 KR9 KR8
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04002h DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04003h X E R/W RS KS3 KS2 KS1 KS0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04003h KR7 KR6 KR5 KR4 KR3 KR2 KR1 KR0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04003h X E R/W RS KS3 KS2 KS1 KS0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
0400Eh D7 D6 D5 D4 D3 D2 D1 D0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
0400Fh X XXXXCLMIBFOBF

ER-A410/ER-A420 DIAGNOSTIC PROGRAM
– 15 –
CHAPTER 5. DIAGNOSTIC PROGRAM
1. TEST ITEMS
The test items are as follows:
*Starting DIAG.
Mode switch: SRV
key operation: Above code + “TL” key
2. DESCRIPTION OF EACH DIAG PROGRAM
1) DISPLAY BUZZER TEST
1Key operation
100 3
2Test procedure
The decimal point on the LED and the cursor on the LCD will shift
from the lower digit to the upper digit in steps of 1 digit (every 200
msec)
After that, all segments will turn on (about 1 sec)
These two modes are repeated.
At the same time, the buzzer sounds continuously.
3Check that:
A) Each position is correctly displayed.
B) The brightness of each number is uniform.
C) The buzzer sound is normal.
4End of testing
You can exit the test mode by pressing any key. The following is
printed.
100
2) KEY CODE
1Key operation
101 3
2Test procedure
3Check that:
4End of testing
You can exit the test mode by turning the mode switch to a position
other than the PGM mode. The printer prints as follows:
101
Code Description
1) 100 Display buzzer test
2) 101 Key code
3) 102 Printer test
4) 104 Keyboard test
5) 105 Mode switch test
6) 106 Printer sensor test
7) 107 Clock test
8) 110 Drawer 1 open & sensor test
9) 111 Drawer 2 open & sensor test
10) 116 LCD CG test
11) 120 External RAM test
12) 121 CPU internal RAM test
13) 130 FLASH ROM test
14) 160 AD conversion port test
15) 500 RS232 ch1 test
16) 501 RS232 ch2 test
17) 510 EFT self test
KEYBOARD: 1: Normal type 0: Flat type
KEY code: Every time a key is pressed, the hard code of that key
is displayed as a decimal number.
When a key is pressed twice or pressed in an incor-
rect manner, --- will be displayed.
TL
DISP BUZZER SRV
0123456789ABCDEF
OP display
Rear display 4.5.6.7.8.9.0.
TL
KEY CODE SRV
OP display
KEY CODE
KEYBOARD

ER-A410/ER-A420 DIAGNOSTIC PROGRAM
– 16 –
3) PRINTER TEST
1Key operation
102 3
2Test procedure
At the receipt side, the logo is also printed and the receipt is issued.
3Check that:
The print is free from contamination, blur, and uneven density.
4End of testing
The test will end automatically.
4) KEYBOARD TEST
1Key operation
_ _ _ _104 3
2
KEY check sum code
2Test procedure
The keyboard is checked using the sum check code of the key
code.
If the sum check code is not entered, the check is made using the
sum check code of the default keyboard arrangement
The sum check data for each model is entered to the front 4 digits
of the DIAG code, and that data is compared with the key data
added until the final key (CA/AT) is pressed.
Both data are the same, the test ends, printing the number given
below.
If both data are different, the printer prints the error message.
3Check:
A) The content of completion print
4End of testing
Note: Calculation of key sum check data
Hard codes (hexadecimal number) at the position (excluding
feed key) where there is an input data contact are added.
However, the end key (TL) is not added.
This data to which hard codes have been added is converted into
a decimal number value, which will become the sum check data
that will be entered when DIAG is started.
5) MODE SWITCH TEST
1Key operation
105 3
2Test procedure
The above X must be read in the correct order. (If the contact is
open, 9 will be displayed.)
3Check:
The display during testing and the content of the completion print.
4End of testing
6) PRINTER SENSOR TEST
1Key operation
106 3
2Test procedure
Check the status of the paper end sensor and head up sensor.
3Check the following.
4End of testing
You can exit the test mode by pressing any key and the printer
prints the following.
106
7) CLOCK TEST
1Key operation
107 3
2Test procedure
3Check that:
“–“ blinks and the clock counts up.
When the test ends normally: 104
When an error occurs: E – ~ – 104
TL
R/J PRINTER SRV
OP display
5 lines of 24 digits are printed.
Enlargement
TL
KEY BOARD SRV
OP display
KEY CODE
104
When the test ends normally 105
When an error occurs: E – ~ – 105
X:1 - Paper present at the receipt side
O - No paper at the receipt side
Y:1 - Paper present at the journal side
O - No paper at the journal side
TL
MODE
105 SW X
SRV
OP display
MODE: SRV_PGM2_PGM1_OFF_OP X/Z_REG_MGR_X1/Z1_X2/Z2__SRV
X : 100293 456 7
TL
R/J SENSOR SRV
XY
OP display
106
TL
TIM CHECK SRV
OP display
Hour
Blinks at an interval of 0.5 sec.
Min. Sec.
107ER

ER-A410/ER-A420 DIAGNOSTIC PROGRAM
– 17 –
4End of testing
When any key is pressed, the date and time are printed and the
test mode will be terminated.
8) DRAWER 1 OPEN & SENSOR TEST
1Key operation
110 3
2Test procedure
3Check that:
A) The drawer 1 opens normally.
B) The sensor correctly indicates the status of the drawer 1.
4End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
110
9) DRAWER 2 OPEN & SENSOR TEST
1Key operation
111 3
2Test procedure
3Check that:
A) The drawer 2 opens normally.
B) The sensor correctly indicates the status of the drawer 2.
4End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
111
10) LCD CG TEST
1Key operation
116 3
2Test procedure
To check the display CG, 256 pieces of built-in CG's are grouped
into 16 blocks and each 16 characters is displayed on the dot dis-
play.
At first, CG code of 00H ~ 0FH is displayed. By pressing any key,
each block is displayed in sequence.
3Check that:
A) Displays are clear.
B) Free from blur, chip-off, unevenness.
4End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
116
11) EXTERNAL RAM TEST
1Key operation
120 3
2Test procedure
The standard 256 Kbyte RAM is checked.
The contents of memory must be stored before and after this test.
RAM (08000H~7FFFFH area and 28000H~2FFFFH area) is tested
in the following procedure:
a) Store data in the test areas
b) Write “00H”
c) Read and compare “00H” and then write”55H”
d) Read and compare “55H” and then write “AAH”
e) Read and compare “AAH”
f) Restore stored data
If an error occurs at a step, the error is printed.
If any error does not occur, the following addresses are checked in
turns.
Addresses to be checked:
08000H, 08001H, 08002H, 08004H, 08008H, 08010H, 08020H,
08040H, 08080H, 08100H, 08200H, 08400H, 08800H, 09000H,
0A000H, 0C000H, 10000H, 18000H, 28000H (BANK 0),
28000H (BANK 3), 30000H, 40000H
3Check:
A) The completion print.
4End of testing
The program ends after printing as follows:
When an error occurs, the printer outputs the error message and the
address where the error has occurred in the area *****.
107XXXXXX XXXXXX
yearmonthday
hour min. sec.
TL
DRAWER SRVX
OP display
X : O = DRAWER OPENED
C = DRAWER CLOSED
1
TL
DRAWER SRVX
OP display
X : O = DRAWER OPENED
C = DRAWER CLOSED
2
TL When the test ends normally: 120
When the test end abnormally: Ex – ~ – 120
*****
x = 1: Data error
x = 2: Address error
XY SRV
OP display
"XY" indicates the code at the head of each block
in hexadecimal number.
(Example: 10, A0)
"O" indicates the CG display position.
TL
RAM SRV
OP display 120

ER-A410/ER-A420 DIAGNOSTIC PROGRAM
– 18 –
12) CPU INTERNAL RAM TEST
1Key operation
121 3
2Test procedure
The test program tests internal RAM (10 Kbytes) of the CPU.
The contents of memory must be stored before and after this test.
RAM (00400H ~ 02BFFH area) is tested in the following procedure.
a) Store data in the test area.
b) Write “00H”
c) Read and compare “00H” and then write “55H”
d) Read and compare “55H” and then write “AAH”
e) Read and compare “AAH”
f) Restore stored data
If an error occurs at a step, the error is printed.
If any error does not occur, the following addresses are checked
in turns.
Addresses to be checked:
01000H, 01001H, 01002H, 01004H, 01008H
01010H, 01020H, 01040H, 01080H,
01100H, 01200H, 01400H, 01800H,
02000H
3Check:
The completion print.
4End of testing
If an error occurs, the printer outputs the error message and the
address where the error has occurred in the area *****.
13) FLASH ROM TEST
1Key operation
130 3
2Test procedure
The test program checks that the checksum of the flash ROM
(BANK0F80000H ~ FFFFFH).
The lower two digits of the checksum should be 10H. (pending)
3Check:
The completion print.
4End of testing
The test will automatically be terminated and the printer prints as
follows:
14) AD CONVERSION PORT TEST
1Key operation
160 3
2Test procedure
The test program displays the voltage of each AD conversion port.
3End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
160
15) RS232 CH1 TEST
Install the RS232 loopback connector.
1Key operation
500 3
2Test procedure
The test program checks the control signals.
Data communication check
A loopback test of 256-byte data between is performed.
DATA: $00 - $FF BAUD RATE:9600 BPS
3Check:
The completion print.
4End of testing
The test program ends after printing.
When the test ends normally: 121
When the test ends abnormally: Ex – ~ – 121
*****
x = 1: Data error
x = 2: Address error
When the test ends normally: 130
ROM ******** (Model name)
******** (Version)
When the test ends
abnormally: E
– – ~ – – 130
ROM ******** (Model name)
******** (Version)
TL
RAMCPU SRV
OP display 121
TL
ROMFLASH SRV
OP display 130
OUTPUT INPUT
/ER1 /RS1 /DR1 /CI1 /CD1 /CS1
OFF OFF OFF OFF OFF OFF
OFF ON OFF OFF ON ON
ON OFF ON ON OFF OFF
ON ON ON ON ON ON
Completion print RS TEST OK
Error print RS TEST **NG**ERxx
xx Contents of error
01 ER DR error
02 ER CI error
03 RS CD error
04 RS CD error
05 SD RD error DATA error
06 SD RD error DATA error/framing error
TL
TM SRV
OP display
Display
160 =
VRF SRV
OP display 160 =
VPTEST SRV
OP display 160 =
Repeat
TL
RS TEST SRV
OP display 500
232