Sharp XE-A20S User Manual

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SERVICE MANUAL

CODE : 00Z

XEA20SUSME

ELECTRONIC
CASH REGISTER

MODEL

CONTENTS

CHAPTER 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

XE-A20S

(U version)

CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

CHAPTER 3. MASTER RESET AND PROGRAM RESET. . . . . . . . . 5

CHAPTER 4. HARDWARE DESCRIPTION. . . . . . . . . . . . . . . . . . . . 6

CHAPTER 5. TEST FUNCTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

CHAPTER 8. CIRCUIT DIAGRAM AND PWB LAYOUT . . . . . . . . . 15

Parts mark ed w ith "!" 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 pub lished to be used
for after sales service only.
The contents are subject to change without notice.

LEAD-FREE SOLDER

The PWB’s of this model employs lead-free solder. The “LF” marks indicated on the PWB’s and the Service Manual mean “Lead-Free” sol­der.
The alphabet following the LF mark shows the kind of lead-free solder.

Example:

<Solder composition code of lead-free solder>

Solder composition
Sn-Ag-Cu
Sn-Ag-Bi

Sn-Ag-Bi-Cu
Sn-Zn-Bi
Sn-In-Ag-Bi
Sn-Cu-Ni
Sn-Ag-Sb
Bi-Sn-Ag-P

Bi-Sn-Ag

5mm

Lead-Free

Solder composition
code (Refer to the
table at the right.)

a

(1) NOTE FOR THE USE OF LEAD-FREE SOLDER THREAD

When repairing a lead-free solder PWB, use lead-free solder thread. Never use conventional lead solder thread, which may cause a
breakdown or an accident.

Since the melting point of lead-free solder thread is about 40°C higher than that of conventional lead solder thread, the use of the exclu­sive-use soldering iron is recommendable.

Solder composition code

a
b
z

i
n
s

p

(2) NOTE FOR SOLDERING WORK

Since the melting point of lead-free solder is about 220°C, which is about 40°C higher than that of conventional lead solder, and its solder­ing capacity is inferior to conventional one, it is apt to keep the soldering iron in contact with the PWB for longer time. This may cause land
separation or may exceed the heat-resistive temperature of components. Use enough care to separate the soldering iron f rom the PWB
when completion of soldering is confirmed.

Since lead-free solder includes a greater quantity of tin, the iron tip may corrode easily. Turn ON/OFF the soldering iron power frequently.
If different-kind solder remains on the soldering iron tip, it is melted together with lead-free solder. To avoid this, clean the soldering iron tip

after completion of soldering work.
If the soldering iron tip is discolored black during soldering work, clean and file the tip with steel wool or a fine filer.

CAUTIONS

THERE IS A RISK OF EXPLOSION IF THE BATTERY

IS REPLACED BY AN INCORRECT TYPE.

PROPERLY DISPOSE OF USED BATTERIES ACCORDING

TO THE INSTRUCTIONS.

XE-A20S LEAD-FREE SOLDER

CHAPTER 1. SPECIFICATIONS

1. APPEARANCE

Front view

Operator display
Printer cover

Receipt paper
Keyboard

Drawer
Drawer lock

Printer

Take-up spool

Print roller arm
Print roller

release rever
Inner cover

Customer display
(Pop-up type)

Rear view

Power cord
Mode switch

USB port

Paper roll cradle

Paper positioning guides

2. RATING

XE-A20S
Weight 16.3lb (7.4kg)
Dimensions 13.0 (W) x 16.9 (D) x 11.0 (H) inches

Power source AC 120V (
Power consumption Stand-by 7.7W, Operating 30W (max.)
Working temperature 32°F to 104°F (0°C~40°C)

(330 (W) x 428 (D) x 280 (H) mm)

10%), 60Hz

m

Key names

KEY TOP DESCRIPTION

2

Paper feed key

RA Received-on account key

RCPT/PO Receipt print/Paid-out key

VOID Void key

ESC Escape key

CONV Conversion key

%1, %2 Percent 1and 2 key

RFND Refund key

-

Discount key

@/FOR Multiplication key

• Decimal point key

CL Clear key

0-9,00 Numeric Keys

PLU/SUB PLU/Subdepartment key

DEPT# Department code entry key

DEPT SHIFT Department shift key

CLK# Clerk code entry key

Dept1-32 Department keys

TAX Tax key
Tax 1 SHIFT Tax 1 shift key
Tax 2 SHIFT Tax 2 shift key

AUTO Automatic sequence key

CHK Check key

CH Charge key

MDSE SBTL Merchandise subtotal key

#/TM/SBTL Non-add code/Time display/Subtotal key

CA/AT/NS Total/Amount tender/Non Sale key

4. MODE SWITCH

3. KEYBOARD

1) KEYBOARD LAYOUT

Type Normal keyboard
Key position Std/Max 53keys
Key pitch 19 (W) x 19 (H) mm
Key layout Fixed type

2) KEY LIST

Keyboard layout

PLU

/SUB

4

3

2

1

RCPT

/PO

VOID

DC

ESC

BS

CONV

NUMBER

Ð

RFND

%1RA
%2

SPACE

SHIFT

@/

FOR

CL

¥
789
456
123

0

00

Note: The small characters on the bottom or lower right in each key

indicates functions or characters which can be used for character
entries for text programming.

DEPT

DEPT

A

20

B

8

19

C

7

18

D

6

17

E

5

CLK

#

SHIFT

#

F

24

G

23

H

22

I

21

J

P

K

28

32

L

12

Q

16

27

31

M

11

R

15

26

30

N

10

S

14

25

29

O

9

T

13

AUTO

TAX

X

U

TAX2

TAX1

SHIFT

SHIFT

Y

V

CHK

CH

Z

W

MDSE

#/TM

SBTL

SBTL

CA/AT/NS

XE-A20S SPECIFICATIONS

1) LAYOUT

• Rotary type

MA

OP

REG

OP

MGR

X/Z

X

OFF
VOID

PGM

1/Z1

X2/Z2

The mode switch can be operated by inserting one of the two supplied
mode keys - manager (MA) and operator (OP) keys. These keys can be
inserted or removed only in the “REG” or “OFF” position.

– 1 –

Manager key (MA)

Operator key (OP)

MA

OP

The mode switch has these settings:

OFF: This mode locks all register operations. (AC power turns off.)

No change occurs to register data.

OP X/Z: To take individual clerk X or Z reports, and to take flash

reports.
It can be used to toggle receipt state “ON” and “OFF” by
pressing he [RCPT/PO] key.

REG: For entering sales.
PGM: To program various items.
VOID

: Enters into the void mode. This mode allows correction after

finalizing a transaction.

MGR: For manager’s entries. The manager can use this mode for an

override entry.

X1/Z1: To take the X/Z report for various daily totals.
X2/Z2: To take the X/Z report for periodic (weekly or monthly)

consolidation.

5. DISPLAY

1) OPERATOR DISPLAY

Display device: LED
Number of line: 1 line
Number of positions: 10 digits
Color of display: Yellow / Green
Character form: 7 segment
Character size: Numeric 14 (H) x 8 (W) mm

Layout:

PLU/SUB

REPEAT

DEPT

RCPT
OFF

2) CUSTOMER DISPLAY

Display device: LED
Number of line: 1 line
Number of positions: 7 digits
Color of display: Yellow / Green
Style: Pop up type
Character form: 7 segment
Character size: 14mm (H) x 8mm (W)

Layout:

DC SHIFT NUMBER

 Operator display

PLU/SUB

DEPT REPEAT

RCPT

OFF

DC

Clerk code

NUMBERSHIFT

 Customer display
(Pop-up type)

Amount: Appears in the far-right eight (max.) positions. When the

amount is negative, the minus symbol “-” appears before the
amount.

Number of repeats for repetitive registrations:

The number of repeats is displayed, starting at “2” and incre­mental with each repeat. When you have registered ten
times, the display will show “0.” (2

3

3

.....

9 3 0 3 1 3 2

Receipt function status:

The indicator “_” appears in the RCPT OFF position when
the receipt function is in the OFF status.

Time: Appears in the far-right six positions (hour-minute - ”A” or

hour-minute - ”P”) in the OP X/Z, REG, or MGR mode. “A” is
displayed in the morning (AM), and “P” in the afternoon
(PM). In the REG or MGR mode, press the [#/TM/SBTL] key
to display the time.

Machine state symbols

: Appears during program ming.

: Appears when an error is detected.
: Appears when the subtotal is displayed or when the amount

tendered is smaller than the sales amount.

: Appears when the [CONV] key is pressed to calculate a su bto-

tal in foreign currency.

: Appears when a transaction is finalized by pressing the [CA/AT/

NS], [CHK] or [CH] key.

: Appears when the change due amount is displayed.

: May appear in the far-left three positions at the timing of key

entry when the electronic journal (EJ) memory is full. (Depend­ing on programming.)

: Appears when the voltage of the installed batteries is under the

required level. You must replace with new ones within two days
to avoid loss of memory.

:

Appears when the batteries are not installed, or the installed
batteries are dead. You must replace with new ones immediately.

: May appear right below the eighth and ninth places at the timing

of finalization of a transaction when the electronic journal (EJ)
memory is nearly full.
Also appears right below the tenth place when power save
mode is effective.

: Appears when the print roller arm is not locked.

: Appears w hen the paper is not installed or paper is out.

...

)

XE-A20S SPECIFICATIONS

– 2 –

Segment

Display

position

Amount 1-8
Minus sign 2-10 -: Floating
Error 8-10 Exx :xx = error code
PGM Mode 10 P
CASH, CHECK,

CHARGE

SUB TOTAL/
short tender

Change 10 C: L i g ht u p w h e n e ve r t h e c hange

Currency
Conversion

Department 9-10 No zero-suppressed
PLU 7-10 No zero-suppressed
Repeat 8 Endless count, starting from 2.
Receipt OFF 9 _
DC _: Double size character entry status
SHIFT _: Shift character entry status
NUMBER _: Number character entry status
Clerk No. 2, 3 -xx-: clerk number
EJ FULL 8-10 E-E: Light up when EJ memory is

Low Battery 10 L:
No Battery 10

10 F: Light up when a registration is

10 o

10 c : Light up whenever the foreign

finalized by depressing CASH,
CHECK, CHARGE key

due amount appears in the display.

amount appears in the display.

FULL at the timing of key entry
(by PGM selection).

:

L

Description

Decimal Point

Display

position
Decimal point 7-1
TAB 4-1
EJ near full 8, 9 (by PGM selection)

Description

6. PRINTER

1) Printer

• Part number : M-T53II

• No. of station : 1 (Receipt or journal)

• Validation : No.

• Printing system : Line thermal

• No. of dot : 288 dots

• Dot pitch : Horizontal 0.167mm
Vertical 0.167mm

• Font : 10 dots (W) x 24 dots (H)

• Printing capacity : max. 24 characters/Line

• Character size : 1.67mm (W) x 4.00mm (H) at 10 x 24 dots

• Print pitch : Column distance 2.0mm
Row distance 5.21mm

• Print speed : Approximate 60mm/s (Approximate 12 l/s)

• Paper feed speed : Approximate 60mm/s (Approximate 12 l/s)

• (Manual feed) : Approximate 60mm/s (Approximate 12 l/s)

• Reliability : Mechanism LIFE 6 million lines used to
high quality thermal paper

• Paper end sensor : Set up

• Cutter : Manual Cutter

• Near end sensor : No

2) Paper

• Paper roll dimension: 2.25 m 0.02 inch

57.5

0.5mm in width

m

Max. 3.15 inch
Max. 80mm in diameter

• Paper quality: High-quality thermal paper
paper thickness: 0.06 to 0.08mm

Nihon seisi thermal paper TF50KS-E2C
KANZAN thermal paper: KF50
KSP thermal paper: P350

3) Logo stamp

• No

4) Printing area

Number of thermal head heater elements 288 dots

XE-A20S SPECIFICATIONS

– 3 –

(4.75) (4.75)48 (288 dots)

print area

(max.24 characters)

0.167

57.5±0.5

(Paper dimension)

(units : mm)

7. DRAWER

8. BATTERY

[OUTLINE]

• Standard equipment: Yes (1)

• Max. number of additional drawers: 0

• The drawer consists of:

1) Drawer box (outer case) and drawer

2) Money case

3) Coin case

4) Lock (attached to the drawer)

[SPECIFICATION]

1) DRAWER BOX AND DRAWER

• Model name of the drawer box : SK-415

• Size : 330 (W) x 418 (D) x 98 (H) mm

• Material : Metal

• Bell :

• Release lever : Standard equipment:

• Drawer open sensor :

• Separation from the main unit :

13 (W) x 16.5 (D) x 3.9 (H) inch

-

locate on the bottom

-

-

2) MONEY CASE

Separation from the drawer Disallowed
Separation of the bill compartments from the

coin compartments
Bill separator
Number of compartments 4B/5C

Layout:

4B/5C

Allowed

-

1) MEMORY BACK UP BATTERY

For memory back up, (3) dry AA batteries are needed.

1. Memory holding time:
Approx. 1 year after NEW dry batteries are installed.

2. Battery replacement method:
When the low battery symbol “L” lights up, replace the batteries (3

AA) by the following method;

1) Power on the ECR.

2) Mode switch turn to “REG” mode.

3) Remove the OLD dry batteries (3 pieces).

4) Insert the NEW dry batteries (3 pieces).

5) Confirm the low battery symbol “L” is off.

2) LOW BATTERY

Low battery indication will appear on the left side of display when the
battery voltage is low.

CASE 1: When machine is sitting idle or after finalization of a transaction.

The machine will always indicate the low battery condition.

CASE 2: During any numeric or item key entry.

Battery condition will not appear.
Except when the power is restored after a power failure, t he low
battery condition will appear on the display only when the battery
is low and the indicator will disapear after any key entry.

[Display sample]

“ 0.00”: Battery is OK.
“L 0.00”: Low battery (You have to change the batteries.)
“

0.00”: No battery (You have to change the batteries immediately.)

L

After finalization

“F 12.34”: Battery is OK.
“L 12.34”: Low battery. (“L” indicate instead of “F”.)
“

12.34”: No battery. (“L” indicate instead of “F”.)

L

Note: “NO BATTERY”: When “NO BATTERY” is displayed, the master

reset is executed upon "POWER ON" after
"POWER OFF" or power failure.

3) LOCK (LOCK KEY : LKGIM7331BHZZ)

Location of the lock: Front
Method of locking and unlocking:

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

k

c

o

SK1-1

L

k

c

o

l

n

u

XE-A20S SPECIFICATIONS

– 4 –

CHAPTER 2. OPTIONS

1. OPTIONS (NONE)

2. SERVICE TOOL

NO NAME PARTS CODE

1 USB cable For connection between ECR and PC

PRICE

RANK

DESCRIPTION

3. SUPPLIES

NO NAME PARTS CODE

1 Thermal roll paper

TPAPR6656RC05

PRICE

RANK

BA 5 ROLLS/PACK

DESCRIPTION

CHAPTER 3. MASTER RESET AND PROGRAM RESET

1. MASTER RESETTING

Master resetting clears the entire memory and resumes default values.
Master resetting can be accomplished by using the following procedure:

Procedure: 1) Plug in the AC cord to the wall outlet.

2) Set the mode switch to REG position.

3) Remove the 3 AA batteries.

4) Unplug the AC cord from the wall outlet.

5) Wait over 1 minute for discharging.

6) Plug in the AC cord to the wall outlet.

7) Install the 3 AA batteries.

Note: The master reset can also be accomplish ed in the f ollowi ng case.

In case a power failure occurs when the machine has no batteries
installed, the maste r reset ope ration i s automat ically per formed af ter
the power has bee n restored.
When power failure occurs with no batteries installed in the the
machine, all memory is l ost and t he machine does not work pro perly
after power is restored, thus req uir ing the master rese t operat ion. )

2. PROGRAM RESETTING

(INITIALIZATION)

This resetting resumes the initial program without clearing memory.
This resetting can be operated at below sequence in PGM mode.

Procedure: 1) Unplug the AC cord from the wall outlet.

2) W ait over 1 muinite for discharging.

3) S et the mode switch to the PGM position.

4) W hile holding down the FEED key,
plugin the AC cord to the wall outlet.

Note: In case a power failure occurs when the machine has no batter-

ies installed, the master reset operation is automatically per­formed after the power has been restored.

XE-A20S OPTIONS

– 5 –

CHAPTER 4. HARDWARE DESCRIPTION

1. HARDWARE BLOCK DIAGRAM

POWER SUPPLY

CPU

Data bus
Address

bus

DRIVER , SENSOR

ROM : 256K Byte
RAM : 20K Byte

STANDARD
DRAWER.

RAM

128K Byte

PRINTER

M-T53II

PAPER TAKE

UP MOTOR

4 to 16

DECORDER

KEY SCAN SIGNAL

KEY RETURN SIGNAL

M66291GP

POPUP

Seg. DRIVER

FRONT

LED

Dig. DRIVER

KEYBOARD
MODE SWITCH

USB TYPE B

CPU : RENESAS 30624 (MASK) (ROM 256KB RAM 20KB)
EXTERNAL MEMORY : RAM 128 KB
PRINTER : EPSON M-T53II 1SHEET
USB CONTROLLER : RENESAS M66291FP

XE-A20S HARDWARE DESCRIPTION

– 6 –

TRANSFORMER

/

PQ1CG2032

/POFF detect point

PQ1CG2032

ON/OFF Control (MODE SW)

LM2574

+ Tr.

VH, VP (8V)

PRINTER HEAD, MOTOR
PAPER TAKEUP MOTOR

ON/OFF Control (MODE SW,
/POFF, CPU P105)

2. DESCRIPTION OF MAIN LSI’S

2-1. CPU (M30624MGA)

1) Pin configuration

D6

D5D4D3

D2

D1

D0

DTS

LATCH

P105

P104

P103

Vref

P101

GND

TH

VDD

VDD

P97

9998979695949392919089888786858483828180797877

P96
P95
P94
P93
P92
P91

P90
VDD
GND

XCIN
XCOUT
/RESET

XOUT

GND

XIN
VDD
VDD

CTCRL

/FRDY
P-OFF

MOTOR

BUZ1

P77

P76

P75

100

AN4

AN3

AN2

AN1

AN0

SIN4

VREF

AVSS

AVCC

1

SOUT4

2

CLK4

3

TB4IN

4

TB3IN

5

SOUT3

6

SIN3

7

CLK3

8

BYTE

9

CNVss

10

XCIN

11

XCOUT

12

/RESET

13

XOUT

14

Vss

15

XIN

16

Vcc

17

NMI

18

INT2

19

INT1

20

INT0

21

TA4IN/U

22

TA4OUT/U

23

TB3IN

24

TBEOUT

25

TA2INW

TA2OUTW

TA1IN/V

TA1OUT/V

TB5IN

26272829303132333435363738394041424344454647484950

P74

P73

P71

CLK

TB5OUT

TXD1

RXD1

P67

P66

DAT

M30624MGA

CLK1

CLKS1

P64

/FRES

AN5

TXD0

FSD

AN7

AN6

RXD0

CLK0

FRD

FSCK

D0

/RTS0

DR1

D1

/RDY

/RDY

D2

ALE

HOLD

/HOLD

VCC

/HLDA

NC

D6

D5D4D3

CBCLK

/RD

NC

/RD

D7

D7

/BHE

NC

V0 24V

Drawer

VLED 5.7V

VCC 5V
VDD 5V

Battery

PH1

P13

P12

P11

P10

76

D9

D8

D12

D11

D10

/WR

/WR

VSS
VCC

/CS3

/CS3

D13
D14
D15

A10
A11
A12
A13
A14
A15
A16
A17
A18
A19

/CS2

/RAS1

A0
A1
A2
A3
A4
A5
A6
A7

A8
A9

/CS1

BUSY

PH2

75

PH3

74

PH4

73

A0

72

A1

71

A2

70
69

A3

68

A4

67

A5

66

A6

65

A7

64

GND

63

A8

62

VDD

61

A9
A10

60
50

A11
A12

58

A13

57

A14

56

A15

55

A16

54

A17

53

NC

52

NC

51

/CS0

/ROS1

XE-A20S HARDWARE DESCRIPTION

2) Pin description

M16C/62 PORT

MEMORY SPACE : MEMORY PROCE SS O R MO DE

(NORMAL MODE)

PROCESSOR MODE : MEMORY PROCESSOR MODE

It is used by (SEPARATE BUS 8bit Width)

PIN

PORT

No.

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 KST0 L IN KEY DISPLA Y

P11 79 O P11 KST1 L IN KEY DISPLA Y

P12 78 O P12 KST2 L IN KEY DISPLA Y

P13 77 O P13 KST3 L IN KEY DISPLA Y

P14 76 O P14 IN1 L OUT L PAPER FEED

P15 75 O P15 IN2 L OUT L PAPER FEED

P16 74 O P16 ENA1 L OUT L PAPER FEED

P17 73 O P17 ENA2 L OUT L PAPER FEED

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 (NU) L OUT L
P45 49 O /CS1 /CS1 OUT L USB

P46 48 O /CS2 /CS2 OUT L SRAM
P47 47 O /CS3 /CS3 OUT L SEGMENT LATCH
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

– 7 –

I/O

Pin

name

Signal

name

Initial
value

OFF

MODE

(4 to 16)

(4 to 16)

(4 to 16)

(4 to 16)

MOTOR

MOTOR

MOTOR

MOTOR

CONTROLLER

Function