Sharp ER-A520 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 without notice.
ERA520USME
ELECTRONIC
CASH REGISTER
ER-A520
MODEL ER-A530
(U, A 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 . . . . . . . . . . . . . . . . . . . . . 14
CHAPTER 6. IPL FROM EP-ROM . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CHAPTER 7. CIRCUIT DIAGRAM AND PWB LAYOUT . . . . . . . . . 20
ER-A520
ER-A530
PARTS GUIDE

ER-A520U/ER-A530U SPECIFICATIONS
– 1 –
CHAPTER 1. SPECIFICATIONS
1. APPEARANCE
ER-A520
ER-A530
2. RATING
3. KEYBOARD
3-1. KEYBOARD LAYOUT
ER-A520
ER-A530
3-2. KEY LAYOUT
ER-A520 KEYLAYOUT
Note: All the keys except the receipt paper feed and journal paper feed
keys can be re-positioned.
■Key names
Model ER-A520/530
Weight 31.7lbs (14.4kg)
Dimensions 421 (W) x 427 (D) x 297 (H) mm
16.6 (W) x 16.8 (D) x 11.7 (H) inch
Power source 120V m10%, AC 60Hz
Power consumption Stand-by 11W, Operating 47W (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 0.8 m0.2 mm
Key pitch 18 (W) x 15 (H) mm
Front view Rear view
Printer cover
Receipt paper
Journal window
Keyboard
Drawer
Drawer lock
Customer display (Pop-up type)
Operator
display
Mode
switch
Printer
cover lock
(left side)
Rear cover
Front view Rear view
Printer cover
Receipt paper
Journal window
Keyboard
Drawer
Drawer lock
Customer display
(Pop-up type)
Operator
display
Mode
switch
Printer
cover loc
k
(left side)
Rear cover
2RECEIPT Receipt paper feed key
2JOURNAL Journal paper feed key
[0]~[9], [00] Numeric keys
[ • ] Decimal point key
CL Clear key
@/FOR Multiplication key
RFND Refund key
VOID Void key
AMT Amount entry key
CASH# Cashier code entry key
PLU/UPC PLU/UPC key
INQ PLU/UPC inquiry key
PRICE CHANGE UPC price change key
-Discount 1 key
%1, %2 Percent 1 and 2 keys
NC New check key
PBLU Previous balance key
FINAL Final key
NS No-sale key
TAX SHIFT TAX 1 shift key
TAX Manual tax key
MDSE SBTL Merchandise subtotal key
1 ~ 20 Department keys
AUTO1~AUTO2 Automatic sequencing 1 and 2 keys
RA Received-on-account 1 key
PO Paid-out 1 key
FS SHIFT Food stamp shift key
FS TEND Food stamp tender key
CH1, CH2 Charge 1and 2 keys
CONV Currency conversion key
CHK Check 1 key
SBTL Subtotal key
CA/AT Cash/amount tendered key
RCPT Receipt print key
RCPT
AMT
5
INQ
SBTL
7
4
1
000
4
3
2
1
10
9
8
7
6
15
14
13
12
11
20
19
18
17
16
NS
CA/AT
2
56
89
PLU/UPC
3
#/TM
VOID
RFND
TAX
TAX
SHIFT
@
FOR
SLIP PBLU
CONV
FINAL
CASH#
CL
PRICE
CHANGE
FS
SHIFT AUTO 1
MDSE
SBTL
CHK CH2
CH1
FS
TEND AUTO
2
%2
%1 PO
RA
7
4
1
000
2
-2
56
89
3
@/FOR
CL
E
D
C
B
A
J
I
H
G
FK
S
Q
W
V
RZ
Y
X
O
N
M
L
T
U
%$# &
(/@*')
!.,;:
=-+
><
?
P
NC
O
`
`
~
^
V
NUM
£
Pt
(Back
Space)
■TEXT PRESET KEY LAYOUT
■STANDARD KEY LAYOUT

ER-A520U/ER-A530U SPECIFICATIONS
– 2 –
Note: The following function keys can optionally be mounted in place of
those shown in the figure of the standard keyboard layout. For
details, please consult your authorized SHARP dealer.
■Optional keys
Note: The department and direct PLU keys may be expanded. If you
require expansion of the department or direct PLU keys, please
contact your dealer.
ER-A530 KEYLAYOUT
Note: • All keys except the receipt paper feed and journal paper feed
keys may be re-positioned.
If you want to change the keyboard layout, please consult your
dealer.
• Please note that the price lookup/subdepartment/UPC key
([PLU/SUB]) and the previous balance key ([PBLU]) are shown
as [PLU/UPC] and [PBLU] urespectively in this manual.
PLU/UPC PBAL
■Key names
Note: The following function keys can optionally be added in place of
those shown in the figure of the standard keyboard layout. For
details, please consult your authorized SHARP dealer.
SLIP Slip printer key
#/TM Non-add code/Date & time display key
DEPT# Dept. number key
%3 ~ %5 Percent 3 thru 5 keys
-2 ~ -5 Discount 2 thru 5 keys
CH3 ~ CH9 Charge 3 thru 9 keys
CA2 ~ CA5 Cash 2 thru 5 keys
CONV2 ~ CONV4 Currency conversion 2 thru 4 keys
RA2 Received-on-account 2 key
PO2 Paid-out 2 key
AUTO3 ~ AUTO10 Automatic sequencing 3 thru 10 keys
SRVC Service key
TRAY SBTL Tray subtotal key
RETURN Return key
CHK2~CHK5 Check 2 through 5 keys
TRANS OUT Transfer out key
TRANS IN Transfer in key
CA TIP Cash tip key
CH TIP Charge tip key
TIP PAID Tip paid key
EAT IN1~EAT IN3 Eat in 1 thru 3 keys
TAX2 SHIFT~TAX4 SHIFT Tax 2 thru 4 shift keys
DEPO Deposit key
DEPORFND Deposit refund key
LEVEL# PLU level shift number key
RP SEND Remote printer send key
GRT EXEMPT Gratuity exempt key
OPEN TARE Tare entry key
REPEAT Repeat entry key
GASSBTL Gasoline sales subtotal key
P-SHIFT# Price shift number key
SCALE Scale entry key
L1~L5 PLU level shift 1 thru 5 keys
P1~P6 Price level shift 1 thru 6 keys
PRINT Validation print key
CVCNT Cover count entry key
NO DEL No delete key
BS Bill separation key
BT
Bill totalize/Bill transfer key (CHECK-ADD)
BIRTH Birthday entry key
RFND SALES Refund sales key
WASTE Waste mode key
C NEXT Condiment next key
C CANCEL Condiment cancel key
EDIT TIP Edit tip key
GLU RECALL Table# recall key
000 Numeric key
2RECEIPT Receipt paper feed key
2JOURNAL Journal paper feed key
[0] ~ [9], [00], [000] Numeric keys
[ • ] Decimal point key
CL Clear key
@/FOR Multiplication key
RCPT Receipt print key
RFND Refund key
VOID Void key
PLU/SUB Price lookup/subdepartment/UPC key
[ 1] ~ [100] Direct price lookup keys
L1~L3 PLU level shift 1 thru 3 keys
NC New check key
SRVC Service key
FINAL Final key
PBAL Previous balance key
-Discount 1 key
% Percent 1 key
INQ PLU/UPC inquiry key
SERV# Server code entry key
AUTO1 ~ AUTO3 Automatic sequencing 1 thru 3 keys
CONV Currency conversion key
CH1 ~ CH3 Charge 1 thru 3 keys
CHK Check 1 key
MDSE SBTL Merchandise subtotal key
SBTL Subtotal key
CA/AT Cash/amount tendered key
RP SEND Remote printer send key
I
(SHIFT)
SBTL CA/AT
@
FOR
BACK
SPEACE
(DC)
00
0
1
4
7
GHJKL
ERTY
{}
?
U
#$%
^
)=
Z
CL
000
RECEIPT
JOURNAL
” ”
<>
!@
QW
AS
CV
X
F
D
,.
BN
;:
OP
&(
Ñ¿
2
5
8
3
6
9
M_
/
1234567890 +
-
[]
■TEXT PRESET KEY LAYOUT
■STANDARD KEY LAYOUT
31
20
9
79
67
56
45
34
23
12
1
32
21
10
80
68
57
46
35
24
13
2
33
22
11
91
81
69
58
47
36
25
14
3
64
53
42
92
82
70
59
48
37
26
15
4
65
54
43
93
83
71
60
49
38
27
16
5
66
55
44
99
89
77
100
90
78
94
84
72
61
50
39
28
17
6
97
87
75
95
85
73
62
51
40
29
18
7
98
88
76
96
86
74
63
52
41
30
19
8
CONV
RP
SEND
%RCPT
L1 L2 L3
SBTL CA/AT
PBAL
SRVC
CH1
CH2
CH3FINAL
NCRFND
CHK
AUTO
1
AUTO
2
SERV
#
AUTO
3
MDSE
SBTL
000 000
123
456
789
CL
RECEIPT
JOURNAL
@
FOR
PLU/
SUB
INQVOID

ER-A520U/ER-A530U SPECIFICATIONS
– 3 –
■Optional keys
Note: Department and direct PLU keys can be expanded. If you require
expansion of the department or direct PLU keys, please contact
your authorized SHARP dealer.
4. MODE SWITCH
4-1. MODE SWITCH AND MODE KEYS
The mode switch has these settings:
DEPT# Dept. number key
%2 ~ %5 Percent 2 thru 5 keys
-2 ~ -5 Discount 2 thru 5 keys
CH4 ~ CH9 Charge 4 thru 9 keys
CA2 ~ CA5 Cash 2 thru 5 keys
CONV2 ~ CONV4 Currency conversion 2 thru 4 keys
RA1, RA2 Received-on-account 1 and 2 keys
PO1, PO2 Paid-out 1 and 2 keys
AUTO4 ~ AUTO10 Automatic sequencing4 thru 10 keys
CHK2 ~ CHK5 Check 2 through 5 keys
TRANS OUT Transfer out key
TRANS IN Transfer in key
CA TIP Cash tip key
CH TIP Charge tip key
TIP PAID Tip paid key
EAT IN1 ~ EAT IN3 Eat in 1 thru 3 keys
TAX1 SHIFT ~
TAX4 SHIFT Tax 1 thru 4 shift keys
DEPO Deposit key
DEPO RFND Deposit refund key
TAX Manual tax key
TRAY SBTL Tray subtotal key
RETURN Return key
GAS SBTL Gasoline sales subtotal key
#/TM Non-add code/Date & time display key
NS No-sale key
SCALE Scale entry key
LEVEL# PLU level shift number key
L4, L5 PLU level shift 4 and 5 keys
P-SHIFT# Price shift number key
P1 ~ P6 Price level shift 1 thru 6 keys
PRINT Validation print key
CV CNT Cover count entry key
SLIP Slip printer key
BS Bill separation key
BT Bill totalize/Bill transfer key (CHECK-ADD)
NO DEL No delete key
GRT EXEMPT Gratuity exempt key
OPEN TARE Tare entry key
REPEAT Repeat entry key
AMT Amount entry key
PRICE CHANGE UPC price change key
BIRTH Birthday entry key
RFND SALES Refund sales key
WASTE Waste mode key
C NEXT Condiment next key
C CANCEL Condiment cancel key
EDIT TIP Edit tip key
GLU RECALL Table# recall key
FS SHIFT Food stamp shift key
FS TEND Food stamp tender key
OFF: This mode locks all register operations.
No changes may occur to register data.
OP X/Z: This setting allows cashiers to take an X or Z reports for their
sales information. This mode can also be used for displaying
the date/time and printing the employee's arrival/departure
times. This mode can be also used to toggle receipt state "ON"
and "OFF" by pressing the [RCPT] key. (To utilize this func-
tion, the register must be 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 or PLUs, and percentages.
PGM2: To program all PGM1 programs 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 in the REG mode.
– for example, after-transaction voiding and override entries.
X1/Z1: To take the X/Z reports for various daily totals.
X2/Z2: To take the X/Z reports for various periodic (weekly or monthly)
consolidation of totals.
REG
OP
X / Z
MGR
X
1
/Z
1
X 2 /Z 2
PG
OFF
M 1
PGM 2
MA
SM
Operative range
(SRV) (SRV')
MA SM
• Manager key (MA) • Submanager key (SM)
OP
• Operator key (OP)

ER-A520U/ER-A530U SPECIFICATIONS
– 4 –
5. DISPLAY
5-1. OPERATOR DISPLAY
Layout:
5-2. CUSTOMER DISPLAY
Layout:
6. PRINTER
1) PRINTER (PR-58HM)
2) PAPER
Display device: LCD
Number of lines: 2 lines
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 lines: 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)
Item Description
No. of station 2: Receipt and Journal
Validation No
Printing system Line thermal
No. of dot Receipt: 360 dots
Journal 360 dots
Dot pitch Horizontal: 0.125mm
Vertical: 0.125mm
Font 10 dots (W) x 24 dots (H)
Printing capacity Receipt: Max. 30 characters
Journal: Max. 30 characters
Character size
1.25 mm (W) x 3.0 mm (H): At 10 x 24 dots
Print pitch Column distance: 1.5 mm
Row distance: 3.75 mm
Paper feed speed Approximate 65 mm/s
Reliability Mechanism: MCBF 5milion lines
Paper end sensor Yes (Receipt and Journal)
Cutter Manual
Paper near end sensor No
Printing area
Printing format
Item Description
Name Heat-quality paper
Roll dimension 57.5 m0.5 mm in width
Thickness 0.06 mm to 0.08 mm
0.125 (7.0)
(7.0) (5.5)
360dots
(45)
57.5 ±0.5 5.0
(5.5)
UNIT: mm
106(848dots)
1.5 (12dots) 1.5 (12dots)
0.125
0.125
3.0 (24dots)
3.75 (30dots)
3.75 (30dots)
UNIT: mm
12 x 24
font

ER-A520U/ER-A530U 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
Model name of the drawer
box SK423
Size 420 (W) x 427 (D) x 112 (H) mm
color Gray 368
Material Metal
Bell –
Release lever Standard equipment: attached to the
bottom
Drawer open sensor YES
For U version For A version
Separation from the drawer Allowed Allowed
Separation of the coin compart-
ments from the money case Disallowed Allowed
Bill separator No No
Number of compartments 5B/5C 5B/6C
5B/5C
For U version
5B/6C
For A version
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
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
2 Key kit 1 x 1 key top kit (30) ER-11KT7 ER-A520 only
1 x 2 key top kit (30) ER-12KT7
2 x 2 key top kit (10) ER-22KT7
1 x 1 dummy key kit (30) ER-11DK7G
5 x 1 dummy key kit (10) ER-51DK7G
3 Display UP-P16DP
4 Memory RAM board UP-S02MB

ER-A520U/ER-A530U MASTER RESET AND PROGRAM RESET
– 6 –
CHAPTER 3. MASTER RESET AND PROGRAM RESET
The SRV key is used for performing entries in the SRV mode.
A MASTER RESET clears the entire memory and resumes initial values.
A PROGRAM RESET resumes the initial program without clearing the
memory.
There are 2 kinds of MASTER RESET operations.
1. MASTER RESET 1
Please use “Procedure A” or “Procedure B”
Procedure A: 1) Set the mode switch to the (SRV’) position.
2) Plug in the AC power cord to the wall outlet.
3) While holding down the JOURNAL FEED key, turn
the mode switch to (SRV) position from the (SRV’)
position.
Procedure B: 1) Unplug the AC power 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 power cord to the wall outlet.
Note: Procedure B cannot reset the hardware.
Procedure A must be used to reset the hardware.
2. MASTER RESET 2
Please use “Procedure A” or “Procedure B”
Procedure A: 1) Set the mode switch to the (SRV’) position.
2) Plug in the AC power cord to the wall outlet.
3) While holding down the JOURNAL FEED & the
RECEIPT FEED keys, turn the mode switch to the
(SRV) position from the (SRV’) position.
4) Program the [0] [1] [2] [3] [4] [5] [6] [7] [8] [9] [00] [000]
[.] [CL] [@/FOR] [SBTL] [CA/AT] keys by depressing
the keys in this order.
Procedure B: 1) Unplug the AC power cord from the wall outlet.
2) Set the mode switch to the (SRV) position.
3) While holding down the JOURNAL FEED & the
RECEIPT FEED key, plug in the AC power cord to the
wall outlet.
4) Repeat the same sequence as in “Procedure A”
Note: Procedure B cannot reset the hardware.
Procedure A must be used to reset the hardware.
3. PROGRAM RESET
Please use either “Procedure A”, “Procedure B” or “Procedure C”
Procedure A: 1) Set the mode switch to the (SRV’) position.
2) Plug in the AC power cord to the wall outlet.
3) Without pressing the JOURNAL FEED key, turn the
mode switch to (SRV) position from the (SRV’) posi-
tion.
Procedure B: 1) Unplug the AC power 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 power cord from the wall outlet.
Procedure C: 1) Unplug the AC power 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 power cord to the
wall outlet.
*“Procedure C” can be executed when SRV#916-B is +4: PROGRAM
RESET in PGM2 = ENABLE.
Note: Procedure B and C cannot reset the hardware.
Procedure A must be used to reset the hardware.
MASTER RESET 1: Normal MASTER RESET
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] [@/FOR] [SBTL]
[CA/AT]
Note: If the [000] key is not required, press the same
key in the next step, and [000] key will be
inhibited.

ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 7 –
CHAPTER 4. HARDWARE DESCRIPTION
1. BLOCK DIAGRAM
ER-A520 and ER-A530
2. MEMORY MAP
2-1. ADDRESS MAP
CPU
MITSUBISHI M30802GP 12MHz
(INTERNAL RAM 10KB)
EXTERNAL MEMORY
STD RAM 1MB
OPT RAM 2MB
FLASH ROM 1MB
PRINTER
PR58HM
2MB 1MB1MB
PRINTER
CPU
RAM 10KB
4 to 16
DECODER
RS232C CH1
DRIVER, SENSOR
KEY & SW
㪧㪦㪮㪜㪩㩷㪪㪦㪬㪚㪜
DRAWER2
DRAWER2
KEY SCAN
KEY SCAN
DIG DRIVER
DIG DRIVER
SEG DRIVER
SEG DRIVER
KEY RETURN
KEY RETURN
RAM OPT RAM FROM
PO
PO
PUP
PUP
LED
LCD
LCD
16 digits
7 digits
x 2LINE
RS232C CH2
DRAWER1
DRAWER1
CI
5V
500000h
600000h
700000h
800000h
900000h
A00000h
B00000h
C00000h
D00000h
E00000h
F00000h
FFFFFFh F-ROM(1MB) EPROM(1MB)
EPROM(1MB) F-ROM(1MB)
NOT USED
NOT USED
NOT USED
INTERNAL
AREA
(1BCLK:0WAIT)
Microprocessor mode : MODE0
IPLION0# "L" IPLON0# "H"
EXTERNAL
AREA0
(2BCLK:1WAIT)
EXTERNAL
AREA1
(3BCLK:2WAIT)
EXTERNAL
AREA2
(3BCLK:2WAIT)
EXTERNAL
AREA3
(2BCLK:1WAIT)
SFR AREA
EXTERNAL I/O
INTERNAL RAM AREA(10KB)
INTERNAL RESERVE AREA
NOT USED
NOT USED
EXPANSION SRAM(UP-S02MB)
400000h - 5FFFFFh
400000h - 5FFFFFh
EXPANSION SRAM
(UP-S04MB)
000000h
000400h
000800h
100000h
200000h
300000h
400000h STD SRAM(1MB)

ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 8 –
3. CPU PIN TABLE
M16C/80 PORT USED IN PROCESSOR MODE: MICROPROCESSOR MODE (SEPARATE BUS 8bit WIDTH)
PORT PIN
No. Pin name Signal name I/O Initial value After POFF Function
P00 122 D0 D0 I/O −In DATA BUS D0
P01 121 D1 D1 I/O−In DATA BUS D1
P02 120 D2 D2 I/O −In DATA BUS D2
P03 119 D3 D3 I/O −In DATA BUS D3
P04 113 D4 D4 I/O −In DATA BUS D4
P05 112 D5 D5 I/O −In DATA BUS D5
P06 111 D6 D6 I/O −In DATA BUS D6
P07 110 D7 D7 I/O −In DATA BUS D7
P10 109 P10 RAS O L Out L RECEIPT
PAPER FEED A
P11 108 P11 RBS O L Out L RECEIPT
PAPER FEED B
P12 107 P12 RCS O L Out L RECEIPT
PAPER FEED C
P13 106 P13 RDS O L Out L RECEIPT
PAPER FEED D
P14 105 P14 JAS O L Out L JOURNAL
PAPER FEED A
P15 104 P15
/INT3# JBS O L Out L JOURNAL PAPER FEED B
P16 103 P16
/INT4# JCS O L Out L JOURNAL PAPER FEED C
P17 102 P17
/INT5# JDS O L Out L JOURNAL PAPER FEED D
P20 101 A0 A0 O −Out L Address Bus A0
P21 100 A1 A1 O −Out L Address Bus A1
P22 99 A2 A2 O −Out L Address Bus A2
P23 98 A3 A3 O −Out L Address Bus A3
P24 97 A4 A4 O −Out L Address Bus A4
P25 96 A5 A5 O −Out L Address Bus A5
P26 95 A6 A6 O −Out L Address Bus A6
P27 94 A7 A7 O −Out L Address Bus A7
P30 92 A8 A8 O −Out L Address Bus A8
P31 85 A9 A9 O −Out L Address Bus A9
P32 84 A10 A10 O −Out L Address Bus A10
P33 83 A11 A11 O −Out L Address Bus A11
P34 82 A12 A12 O −Out L Address Bus A12
P35 81 A13 A13 O −Out L Address Bus A13
P36 80 A14 A14 O −Out L Address Bus A14
P37 79 A15 A15 O −Out L Address Bus A15
P40 78 A16 A16 O −Out L Address Bus A16
P41 77 A17 A17 O −Out L Address Bus A17
P42 75 A18 A18 O −Out L Address Bus A18
P43 73 A19 A19 O −Out L Address Bus A19
P44 72 A20
/CS3# A20 O −Out L Address Bus A20
P45 71 A21
/CS2# A21 O −Out L Address Bus A21
P46 70 A22
/CS1# A22 O −Out L Address Bus A22
P47 69 A23#
/CS0# A23# O −Out L Address Bus A23
P50 65 WR# WR# O −Out L WRITESTROBE
SIGNAL
P51 64 BHE# BHE# O −Out L NOT USED
P52 63 RD# RD# O −Out L READ STROBE
SIGNAL
P53 62 BCLK BCLK O −Out L BCLK CLOCK
P54 55 HLDA# HLDA# O −Out L NOT USED
P55 54 HOLD# HOLD# I −In NOT USED
P56 53 ALE ALE O −Out L NOT USED
P57 52 RDY# RDY# I −In NOT USED
P60 47 RTS0# RS2# O H In RS-232 RS2
P61 46 CLK0
CI2# I−In RS-232 CI2
P62 45 RxD0 RD2 I −In RS-232 RD2
P63 44 TxD0 TD2 O H In RS-232 TD2
P64 43 RTS1# RS1# O H In RS-232 RS1
P65 42 CLK1 CI1# I −In RS-232 CI1
P66 40 RxD1 RD1 I −In RS-232 RD1
P67 38 TxD1 TD1 O H In RS-232 TD1
P70 37 P70/
TA0out KR0# I −In KEY RETURN SIGNAL 0
P71 36 P71/
TA0in KR1# I −In KEY RETURN SIGNAL 1
P72 35 P72/
TA1out KR2# I −In KEY RETURN SIGNAL 2
P73 34 P73/
TA1in
KR3# I−In KEY RETURN
SIGNAL 3
P74 33 P74/
TA2out KR4# I −In KEY RETURN SIGNAL 4
P75 32 P75/
TA2in KR5# I −In KEY RETURN SIGNAL 5
P76 31 P76/
TA3out KR6# I −In KEY RETURN SIGNAL 6
P77 30 P77/
TA3in KR7# I −In KEY RETURN SIGNAL 7
P80 29 P80/
TA4out BUZZER O L In BUZZER SIG-
NAL
P81 28 P81/
TA4in DSEN I −In DRAWEROPEN SENSE SIGNAL
P82 27 P82/
INT0# POFF# I −In P-OFF SIGNAL
P83 26 P83
/INT1# SHEN# I −In
UP-P16DP
SHEN# SINGNAL
P84 25 P84
/INT2# I−In NOT USED
P85 24 P85
/NMI# NMI# I −In NMI (CON- NECTED TO
VDD)
P86 18
P86/
Xcout
Xcout O −Out SUB CLOCK
(32.768kHz)
P87 17 P87/
Xin Xcin I −In SUB CLOCK (32.768kHz)
P90 7 P90/
CLK3 SCK O L Out L UP-P16DP CLOCK SIGNAL
PORT PIN
No. Pin name Signal name I/O Initial value After POFF Function

ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 9 –
POWER SUPPLY/CONTROL PINS
P91 6 P91/
RxD3 STH I −In UP-P16DP STH SIGNAL
P92 5 P92/
TxD3 HTS O L Out L UP-P16DP HTS SIGNAL
P93 4 P93/
RTS3# DRAWER1 O L Out L DRAWER 1
DRIVE SIGNAL
P94 3 P94/
RTS4# DRAWER2 O L Out L DRAWER 2
DRIVE SIGNAL
P95 2 P95/
CLK4 PCLK O L Out L PRINTER CLOCK
P96 1 P96/
TxD4 SO O L Out L PRINTER DATA OUT
P97 144 P97/
RxD4 SI I −In PRINTER DATA IN
P100 141 P100/
AN0 TM I −In
PRINTER HEAD
TEMPERATURE
MONITOR
P101 139 P101/
AN1 VPTEST I −In PRINTER HEAD VOLTAGE MON-
ITOR
P102 138 P102/
AN2 VREF I −In REFERENCE VOLTAGE
P103 137 P103/
AN3 PHUPS I −In
PRINTER HEAD
UP DETECTION
P104 136 P104/
AN4 RPES I −In
PRINTER
RECEIPTPAPER
EMPTY DETEC-
TION
P105 135 P105/
AN5 JPRS I −In
PRINTER JOUR-
NAL PAPER
EMPTY DETEC-
TION
P106 134 P106/
AN6 VHCOM O L Out L
PRINTER
POWER CON-
TROL
P107 133 P107/
AN7 I−In NOT USED
P110 118 P110 STRB1# O H In PRINTER
STROBE 1
P111 117 P111 STRB2# O H In PRINTER
STROBE 2
P112 116 P112 STRB3# O H In PRINTER
STROBE 3
P113 115 P113 STRB4# O H In PRINTER
STROBE 4
P114 114 P114 LATCH# O H In PRINTER
LATCH
P120 90 P120 BLON O L Out L LCD BACK
LIGHT ON
P121 89 P121 LCDON O L Out L LCD POWER
ON
P122 88 P122 LRS O L Out L LCD RS
P123 87 P123 LR/W# O L Out L LCD R/W#
P124 86 P124 LE O L Out L LCD ENABLE
P125 68 P125 LWDL O L Out L LCD WRITE
DATA LATCH
P126 67 P126 IPLON0 I −In IPL from ROM
P127 66 P127 O−Out L NOT USED
P130 61 P130 ER2# O H In RS-232 ER2
P131 60 P131 CD2# I −In RS-232 CD2
P132 58 P132 CS2# I −In RS-232 CS2
P133 56 P133 DR2# I −In RS-232 DR2
PORT PIN
No. Pin name Signal name I/O Initial value After POFF Function
P134 51 P134 ER1# O H In RS-232 ER1
P135 50 P135 CD1# I −In RS-232 CD1
P136 49 P136 CS1# I −In RS-232 CS1
P137 48 P137 DR1# I −In RS-232 DR1
P140 14 P140 KR8# I −In KEY RETURN
SIGNAL 8
P141 13 P141 KR9# I −In KEY RETURN
SIGNAL 9
P142 12 P142 MODE# I −In MODE KEY
RETURN SIG-
NAL
P143 11 P143 FSR# I −In FEED SENSE
SIGNAL
P144 10 P144 WP# I −In Flash ROM WP#
P145 9 P145 RY/BY# I −In NOT USED
P146 8 P146 CKDCR O H In UP-P16DP
RESET SIGNAL
P150 131 P150 KS0 O L Out L KEY STROBE
SIGNAL 0
P151 129 P151 KS1 O L Out L KEY STROBE
SIGNAL 1
P152 128 P152 KS2 O L Out L KEY STROBE
SIGNAL 2
P153 127 P153 KS3 O L Out L KEY STROBE
SIGNAL 3
P154 126 P154 LEDS0 O L Out L LED STROBE
SIGNAL 0
P155 125 P155 LEDS1 O L Out L LED STROBE
SIGNAL 1
P156 124 P156 LEDS2 O L Out L LED STROBE
SIGNAL 2
P157 123 P157 LEDS3 O L Out L LED STROBE
SIGNAL 3
PORT PIN No. I/O PIN NAME FUNCTION
Xin 22 I Xin SYSTEM CLOCK IN
Xout 20 O Xout NC
RESET# 19 I RESET# RESET
BYTE 15 I BYTE Connected to VDD
CNVss 16 CNVss Connected to VDD
Vref 142 Vref Connected to VDD
PORT PIN
No. Pin name Signal name I/O Initial value After POFF Function

ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 10 –
4. PRINTER CONTROL
The PR-58HM printer is employed.
4-1. STEPPING MOTOR CONTROL
The stepping motor is driven at a constant current by SMA7036M (made
by Sanken).
1step: 0.125mm, 1dot: 1step
Printing speed: 50mm/s
<CPU PORT>
<DRIVING STEP>
RECEIPT MOTOR
*When the motor is stopped, rush conduction must be performed for
10ms in the same phase as the last excitation phase to turn off con-
duction to all the phases.
3RAS~RDS and JAS~JDS are turned to "L".
Allow at least 30ms before boosting after stopping.
When boosting, rush conduction must be performed for 10ms in the
first excitation phase to start the motor by acceleration control.
4-2. HEAD CONTROL
HEAD: All864dot
Printable area:RECEIPT side, 360dot;
JOURNAL side, 360dot
Related PORT
*When turning off the printer power supply, make sure to turn
/STB1,2,3,4 to “H.”
*Do not turn on the printer under paper empty state.
*During printing or paper feeding, after 10ms of turning on the printer
head power, A/D conversion must be performed to check that the
voltage is stabilized before starting the operation.
4-3. OTHER PORTS
PHUPS: "1" Head up
PRES : "0" Receipt paper end
PJES : "0" Journal paper end
VHCOM: "1" Thermal head power control: On at "H" and OFF at "L".
Turn off the power conduction when printing is completed (the
motor is stopped).
No. CPU PORT Signal to be used
109 P10 RAS
108 P11 RBS
107 P12 RCS
106 P13 RDS
105 P14 JAS
104 P15 JBS
103 P16 JCS
102 P17 JDS
Driver IC input (CPU output) Motor drive signal
STEP RAS RBS RCS RDS /RPFA /RPFB /RPFC /RPFD
1LHLH ON OFF ON OFF
2LHHLONOFFOFFON
3HLHLOFFONOFFON
4HLLH OFF ON ON OFF
Driver IC input (CPU output) Motor drive signal
STEP JAS JBS JCS JDS /JPFA /JPFB /JPFC /JPFD
1LHHLONOFFOFFON
2LHLH ON OFF ON OFF
3HLLH OFF ON ON OFF
4HLHL OFF ON OFF ON
No. CPU PORT Signal to be used
2 P95/CLK2 PCLK
1 P96/TXD4 SO
144 P97/RXD4 SI
118 P110 STRB1#
117 P111 STRB2#
116 P112 STRB3#
115 P113 STRB4#
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
136 P103 PHUPS
135 P104 PRES
134 P105 PJES
133 P106 VHCOM

ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 11 –
5. A/D CONVERSION
In the ER-A520/530, the following three kinds of signals are inputted to
the A/D conversion port.
<CPU PORT>
5-1. PRINTER HEAD TEMPERATURE MONITOR
A voltage divided by the temperature detection thermistor of the printer
head and the resistor is inputted to AN0 pin.
The printer head conduction must be controlled as shown below.
5-2. PRINTER HEAD VOLTAGE MONITOR
A voltage is supplied by the printer head power source, passed through
the printer, and divided by the resistor is inputted to AN1 pin.
The A/D conversion value must be read after turning VHCOM signal
(CPU P106) to "H" and stabilizing the voltage (after 10msec).
The printable voltage range of the printer is 15V~26V. The voltage is
calculated from the AN1 value and the A/D conversion value of the ref-
erence voltage.
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
6. KEY/DISPLAY
6-1. LCD CONTROL
LCD control is same as the ER-A275P.
LCD-related Register
<CPU PORT>
When the read busy flag of the LCD display remains busy for more than
500ms, turn off LCDON (P121) for 1ms and perform initializing.
No. CPU PORT Signal to
be used Function
130 AN0 TM PRINTER HEAD TEMPERATURE
MONITOR
138 AN1 VPTEST PRINTER HEAD VOLTAGE MONI-
TOR
137 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 FOR CONDUCTION
TIME SPECIFIED ON PR-
58H CONTROL SPEC.
70°C or above 0~231 MOTOR LOCK
Function Address R/W
LCD Write Data 100001h W
LCD Read Data 100001h R
No. CPU PORT Signal to
be used Function
90 P120 BLON LCD BACK LIGHT ON SIGNAL
89 P121 LCDON LCD ON SIGNAL
88 P122 LRS LCD RS SIGNAL
87 P123 LR/W# LCD R/W# SIGNAL
86 P124 LE LCD E SIGNAL
85 P125 DATALE LCD WRITE DATA LATCH
P125: LWDL
L : LCD write data latch
P124: E
Enable Signal Enable
P123: R/W#
H: Data read L: Data Write
P122 LRS
H: Data input L: Instruction Input
LRS
LR/W#
LE
DB0-7
LWDL
DATA WRITE (CPU 3LCD)
Valid Data
P122 "x"
P123 "L" 100001h DATA
WRITE
P124 "H" P124 "L" P123 "H"
LRS
LR/W#
LE
DB0-7
LWDL
DATA READ (CPU 1LCD)
Valid Data
P122 "x"
P123 "H" P125 "H" P124 "H" 100001h DATA
READ
P124 "L" P125 "L"

ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 12 –
6-2. KEY/DISPLAY SCAN
Key/display scan and key read are performed at the following timing.
1Key/display scan cycle: 10ms
2Blanking time: 50us
3KEY DATA READ timing: Read before 10~100us of strobe signal
OFF.
Key/Display-related Register
<LED Segment Signal> Write
<CPU PORT>
KS3~0 : KEY strobe signal is generated.
LS3~0 : POP UP Display strobe signal is generated.
R0#~KR9# : Flat Keyboard KEY Return signal
KR0#~KR7# : Normal Keyboard KEY Return signal
The mode key switch and other signals are read at CPU ports P142 and
P143 at the key strobe timing.
Reading is made 10~100us before the strobe signal OFF..
The Flat Keyboard takes key data in twice during the strobe period.
For read timing, refer to the timing chart below.
Function Address R/W
LED Segment Signal 100000h W
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
100000h DP g f e d c B a
No. CPU PORT Signal to
be used Function
131 P150 KS0 KEY STROBE SIGNAL 0
129 P151 KS1 KEY STROBE SIGNAL 1
128 P152 KS2 KEY STROBE SIGNAL 2
127 P153 KS3 KEY STROBE SIGNAL 3
126 P154 LS0 LED STROBE SIGNAL 0
125 P155 LS1 LED STROBE SIGNAL 1
124 P156 LS2 LED STROBE SIGNAL 2
123 P157 LS3 LED STROBE SIGNAL 3
No. CPU PORT Signal to
be used Function
46 P70 KR0# KEY RETURN SIGNAL 0
45 P71 KR1# KEY RETURN SIGNAL 1
44 P72 KR2# KEY RETURN SIGNAL 2
43 P73 KR3# KEY RETURN SIGNAL 3
42 P74 KR4# KEY RETURN SIGNAL 4
41 P75 KR5# KEY RETURN SIGNAL 5
40 P76 KR6# KEY RETURN SIGNAL 6
39 P77 KR7# KEY RETURN SIGNAL 7
14 P140 KR8# KEY RETURN SIGNAL 8
13 P141 KR9# KEY RETURN SIGNAL 9
No. CPU PORT Signal to
be used Function
12 P142 MODE# MODE KEY SIGNAL
11 P143 FSR# FEED SENS SIGNAL
P142 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
P143 ST10 : Receipt feed “0” Receipt feed
ST11: Journal feed “0” Journal feed
ST13 : Keypad select “1” Flat key
“1” JNormal key
9h Fh 0h
Max.10us
0h 1h FhFh
950 25us
10 - 100us
0h 1h 2h Fh 0h
588us ±20us
50 10us
KS0 - 3
LS0 - 3
Key Return Sinnal
(0h~Fh repeat)
(0h~9h repeat)
LED Segment
Signal BLANK BLANK BLANK
1ST DIGIT
DISPLAY DATA 1ST DIGIT DISPLAY DATA
2nd DIGIT
DISPLAY DATA

ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 13 –
6-3. DISPLAY
The ER-A520/530 is provided with the LCD display of 5 x 7 dot, 2 line,
16 digit on the FRONT side, and the LED display of 7 digit 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
The LED segment signal can be outputted by writing segment data
to 4000h.
DATA~SEGMENT assignment
7. SERIAL I/O
The ER-A520/530 is provided with 2ch RS-232 ports as standard provi-
sion.
Ch1 and Ch2 of RS-232 are assigned to the following CPU ports.
Ch1
Ch2
8. POWER
9. FLASH MEMORY REWRITE PROCEDURE
The FLASH ROM of Fujitsu MBM29F800TA-90 is employed.
IPLONO# :"1"; IPL from EP-ROM. Executed from ER ROM.
IPLON1# :"1"; IPL from COM
WP#: Write protect signal of FLASH ROM. "0" write protect. Not used
in the ER-A520/530.
RY/BY# : Ready/Busy signal from FLASH ROM
IPL from EP-ROM : After setting the IPL SW to ON side, turn on the
power to boost the EP-ROM.
IPL from COM : Data from PC are written into the FLASH ROM through
the COM port. (Max. 38.4kbps)
10. DRAWER
The ER-520/530 is provided with 2ch of drawer ports.
The drive time of the drawer solenoid is as follows:
50ms (max) 45ms(min)
<CPU PORT>
DRAWER1 : "1", DRAWER 1 OPEN
DRAWER2 : "1", DRAWER 2 OPEN
DSEN : "1", DRAWER OPEN
D0~D6 3a~g
D7 3DP
Pin No. CPU PORT Signal to be used
42 /RTS1# RS1#
41 P65 CI1#
40 RXD1 RD1
39 TxD1 SD1
51 P134 ER1#
50 P135 CD1#
49 P136 CS1#
48 P137 DR1#
Pin No. CPU PORT Signal to be used
47 /RTS0# RS2#
46 P61 CI2#
45 RXD0 RD2
44 TxD0 SD2
61 P130 ER2#
60 P131 CD2#
58 P132 CS2#
56 P133 DR2#
No. CPU PORT Signal to
be used Function
67 P126 IPLON0 IPL from EP-ROM
66 P127 IPLON1 IPL from COM
10 P144 WP# F ROM Write Protect signal
9 P145 RY/BY# F ROM Ready/Busy signal
No. CPU PORT Signal to
be used Function
4 P93 DRAWER1 DRAWER1 OPEN SIGNAL
3 P94 DRAWER2 DRAWER2 OPEN SIGNAL
28 P81 DSEN DRAWER OPEN SIGNAL
Service interruption should be performed
within 10ms after generation of /POFF.
TRANS. LM2574 + TR 24V DRAWER
PRINTER
PQ1CG2032 VLED 5.7V
VCC 5.0V
VDD 5.0V
BATTERY
/POFF detection point
ON/OFF control
(MODE SW)

ER-A520U/ER-A530U HARDWARE DESCRIPTION
– 14 –
11. RISTRICTIONS ON PRINT RATIO
Max. 288dot/1line x 140line (Corresponds to black background LOG print)
Ave. 108dot/1line or less (Corresponds to 12.5% of all dots)
12. BUZZER
Oscillation frequency is 2.048kHz (2.0kHz~2.2kHz).
<CPU PORT>
13. UP-P16DP I/F
The ER-A520/530 is provided with I/F with CKDC on the option display
of UP-P16DP.
<CPU PORT>
The CKDCR "HIGH" time to input RESET to the UP-P16DP is min
30us.
14. RESET
The RESET signal is generated under the following condition.
1) When the MODE key switch position is changed from SRV' to any
other position (excluding OFF position).
15. POFF
The POFF signal is changed from 0 to 1 when the 5V power and the
24V power reach the operating voltage level.
It is changed from 0 to 1 when the power falls below the operating volt-
age level.
POFF, RESET TIMING CHART
No. CPU PORT Signal to
be used Function
29 P80 BUZZER BUZZER SIGNAL
No. CPU PORT Signal to
be used Function
26 INT1# SHEN# CKDC interface shift enable signal
7 CLK3 SCK CKDC interface synchronizing shift
clock
6 RxD3 STH CKDC interface shift input data
5 TxD3 HTS CKDC interface shift output data
8 P126 CKDCR CKDC reset signal
+5V
+24V
/
RESET
/
POFF
/
EFTRES
20.8V
min.10ms
min.10ms
POWER ON Instant service
interruption MODE SRV' MODE Other than
SRV'
POWER OFF

ER-A520U/ER-A530U 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 + “CA/AT” 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 Standard RAM test
12) 121 OPTION RAM test
13) 122 CPU internal RAM test
14) 130 FLASH ROM test
15) 160 AD conversion port test
16) 400 POLE DISPLAY test
17) 500 RS232 ch1 test
18) 501 RS232 ch2 test
19) 510 SCANNER 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.
CA/AT
DISP BUZZER SRV
0123456789ABCDEF
OP display
Rear display 4.5.6.7.8.9.0.
CA/AT
KEY CODE SRV
OP display
KEY CODE
KEYBOARD

ER-A520U/ER-A530U 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
When the test ends normally: 104
When an error occurs: E – ~ – 104
CA/AT
R/J PRINTER SRV
OP display
5 lines of 24 digits are printed.
Enlargement
CA/AT
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
CA/AT
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
CA/AT
R/J SENSOR SRV
XY
OP display 106

ER-A520U/ER-A530U DIAGNOSTIC PROGRAM
– 17 –
7) CLOCK TEST
1Key operation
107 3
2Test procedure
3Check that:
“–“ blinks and the clock counts up.
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
CA/AT
TIM CHECK SRV
OP display
Hour
Blinks at an interval of 0.5 sec.
Min. Sec.
107ER
107XXXXXX XXXXXX
yearmonthday
hour min. sec.
CA/AT
DRAWER SRVX
OP display
X : O = DRAWER OPENED
C = DRAWER CLOSED
1
CA/AT
DRAWER SRVX
OP display
X : O = DRAWER OPENED
C = DRAWER CLOSED
2
CA/AT
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.

ER-A520U/ER-A530U DIAGNOSTIC PROGRAM
– 18 –
11) STANDARD RAM TEST
1Key operation
120 3
2The standard RAM is checked.
The contents of memory must be the same before and after this test.
RAM (100000H~1FFFFFH 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:
300000H, 300001H, 300002H, 300004H, 300008H, 300010H,
300020H, 300040H, 300080H, 300100H, 300200H, 300400H,
300800H, 301000H, 302000H, 304000H, 308000H, 310000H,
320000H, 340000H, 380000H,
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 *****.
12) OPTION RAM TEST
1Key operation
121 3
2The standard RAM is checked.
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:
400000H, 400001H, 400002H, 400004H, 400008H, 400010H,
400020H, 400040H, 400080H, 400100H, 400200H, 400400H,
400800H, 401000H, 402000H, 404000H, 408000H, 410000H,
420000H, 440000H, 480000H, 500000H,
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 *****.
When the test ends normally: 120
When the test end abnormally: Ex – ~ – 120
*****
x = 1: Data error
x = 2: Address error
CA/AT
RAM SRV
OP display 120
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
CA/AT
RAMCPU SRV
OP display 121

ER-A520U/ER-A530U DIAGNOSTIC PROGRAM
– 19 –
13) CPU INTERNAL RAM TEST
1Key operation
122 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 *****.
14) FLASH ROM TEST
1Key operation
130 3
2Test procedure
The test program checks that the checksum of the flash ROM
(F00000H ~ 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:
15) 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
16)POLE DISPLAY TEST
UP-P16DP is attached in DISPLAY CN.
1Key operation
400 3
2Test procedure
Displayed in the following procedure A test pattern.
Progresses to the following pattern by pushing arbitrary KEY.
i ) The following test pattern is displayed.
ii) The test pattern of all beam all-points lights is displayed.
3Check:
A) The display of each position is right.
B) Be uniform in the luminosity of each display and there needs to
be no MURA in it.
4End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
400
17) RS232 CH1 TEST
Install the RS232 loopback connector.
1Key operation
500 3
2Test procedure
The test program checks the control signals.
The test program ends after printing.
When the test ends normally: 122
When the test ends abnormally: Ex – ~ – 122
*****
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)
CA/AT
RAMCPU SRV
OP display 122
CA/AT
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
CA/AT
TM SRV
OP display
Display
160 =
VRF SRV
OP display 160 =
VPTEST SRV
OP display 160 =
Repeat
CA/AT
DOT DISPLAY
7SEG DISPLAY
0123456789;AaBbC
0.1.2.3.4.5.6.7.8.9.-.
:
:ccccccccccc
CA/AT