Sharp XE-A302 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.
XEA302USME
ELECTRONIC
CASH REGISTER
MODEL XE-A302
(U and A version)
CHAPTER 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CHAPTER 2. OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
CHAPTER 3. MASTER RESET AND PROGRAM RESET. . . . . . . . . 4
CHAPTER 4. HARDWARE DESCRIPTION . . . . . . . . . . . . . . . . . . . . 5
CHAPTER 5. DIAGNOSTIC PROGRAM . . . . . . . . . . . . . . . . . . . . . 11
CHAPTER 6. IPL FROM EP-ROM . . . . . . . . . . . . . . . . . . . . . . . . . . 15
CHAPTER 7. CAUTION TO BE USED WHEN
CONNECTING THE RS-232 CABLE . . . . . . . . . . . . . 16
CHAPTER 8. CIRCUIT DIAGRAM AND PWB LAYOUT . . . . . . . . . 17

XE-A302U SPECIFICATIONS
– 1 –
CHAPTER 1. SPECIFICATIONS
1. APPEARANCE
2. RATING
3. KEYBOARD
3-1. KEYBOARD LAYOUT
3-2. KEY LIST
■
■■
■Keyboard layout
■
■■
■Key names
4. MODE SWITCH
4-1. LAYOUT
• Rotary type
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.
XE-A302
Weight 27.6lb (12.5kg)
Dimensions 421 (W) x 429 (D) x 297 (H) mm
16.6 (W) x 16.9 (D) x 11.7 (H) inches
Power source AC 120V (m10%), 60Hz
Power consumption Stand-by 8W, Operating 30W (max.)
Working temperature 0°C~40°C (32°F to 104°F)
Type Flat keyboard
Key pitch 18 (W) x 15 (H) mm
Key stroke 1.1 m 0.2mm
Caption on key top Key sheet
Front view Rear view
RS-232C connector
Operator display
Receipt paper
Drawer lock
Drawer
Printer cover
Customer display
(Pop-up type)
Mode switch
Power cord
Keyboard
Take-up spool
Print roller
release rever
Print roller arm
Inner cover
Paper roll cradle
Paper positioning guides
Printer
E/J
PRINT
56
45
34
23
12
1
46
35
24
13
2
57
67
47
36
25
14
3
58
68
48
37
26
15
4
59
69
49
38
27
16
5
60
70
50
39
28
17
6
61
71
51
40
29
18
7
62
72
52
41
30
19
8
63
53
42
31
20
9
73
64
54
43
32
21
10
74
65
55
44
33
22
11
75
66
CLK# 246
135
AUTO
ESC
2
DEPT
#RCPT
/PO
PLU
/SUB
@/FOR
RA
TAX
CONV
TAX1
SHIFT TAX2
SHIFT
CH1 CH2
MDSE
SBTL CHK
#/TM
SBTL
%1
%2
RFND
VOID CA/AT
123
456
789
000
CL
KEY TOP DESCRIPTION
0-9, 00 Numeric keys
• Decimal point Key
CL Clear key
@/FOR Multiplication key
2Paper feed key
RA Received-on-account key
RCPT/PO Receipt print/Paid out key
RFND Refund key
CLK# Clerk code entry key
VOID Void key
AUTO Automatic sequence key
CH1, 2 Charge 1, 2 keys
CHK Check key
TAX1, 2 SHIFT Tax1, 2 shift keys
TAX TAX key
%1, 2 Percent 1, 2 keys
-Discount key
CONV Conversion key
E/J PRINT Electronic journal print key
(D-PLU) 1-75 Direct PLU 1-75 keys
DEPT1-6 Department 1-6 keys
DEPT# Department code entry key
PLU/SUB PLU/Sub department code entry key
#/TM/SBTL Non add code Entry/Time/Subtotal key
MDSE SBTL Merchandise subtotal key
CA/AT Total/Amount tender/No sale
ESC Escape key
PGM
VOID
OFF
OPX/ZREGMGR
X1/Z1
X2/Z2
OP
MA
Manager key (MA)
Operator key (OP)
MA OP

XE-A302U SPECIFICATIONS
– 2 –
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 press-
ing 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) consoli-
dation.
5. DISPLAY
5-1. OPERATOR DISPLAY
Layout:
5-2. CUSTOMER DISPLAY
Layout:
■
■■
■Operator display
• Clerk code or Mode name
The mode you are in is displayed. When a clerk is assigned, the clerk
code is displayed in the REG or OP X/Z mode. For example, “*01*”
is displayed when clerk 01 is assigned.
• Repeat
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 33......9 30 31 32...)
• Sentinel mark
When amount in the drawer reaches the amount you prepro-
grammed, the sentinel mark “X” is displayed to advise you to remove
the money and put it in a safe place.
• Power save mark
When the cash register goes into the power save mode, the power
save mark (decimal point) lights up.
• Function message display area
Item labels of departments and PLU/subdepartments and function
texts you use, such as %1, (-) and CASH are displayed.
When an amount is to be entered or entered, “AMOUNT” is dis-
played: When an amount is to be entered, ------- is displayed at the
numeric entry area with “AMOUNT”. When a preset price has been
set, the price is displayed at the numeric entry 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 [#/TM/SBTL] key to dis-
play 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)
Display device : LCD
Number of line : 2 line
Number of positions : 16 positions
Color of display : Yellow / Green
Character form : 7 segment + Dp
Character size : 14.2 (H) x 7.9 (W) 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)
Function message display area
Clerk code or mode name
Numeric entry display area
Receipt OFF indicator
Repeat / Sentinel mark / Power save mark
Power save mark
(Lighting the mark only under the power save mode)

XE-A302U SPECIFICATIONS
– 3 –
6. PRINTER
6-1. PRINTER
6-2. PAPER
6-3. LOGO STAMP
• No
6-4. PRINTING AREA
Number of thermal head heater elements 288 dots
7. DRAWER
[OUTLINE]
• Standard equipment: Yes
• Max. number of additional drawers: 0
• The drawer consists of:
1) Drawer box (outer case) and drawer
2) Coin case (for SEC)
3) Money case
4) Lock (attached to the drawer)
[SPECIFICATION]
7-1. DRAWER BOX AND DRAWER
7-2. MONEY CASE
7-3. LOCK (LOCK KEY : LKGIM7331BHZZ)
8. BATTERY
8-1. MEMORY BACK UP BATTERY
• 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 0.174mm
• Font : 10 dots (W) x 24 dots (H)
• Printing capacity : max. 24 characters
• Character size : 1.67mm (W) x 4.17mm (H) at 10 x 24 dots
• Print pitch : Column distance 2.0mm
Row distance 5.21mm
• Print speed : Approximate 60mm/s (12 lines/sec)
• Paper feed speed
(Manual feed) : Approximate 60mm/s (12 lines/sec)
• Reliability : Mechanism LIFE 6 million lines used to high-
quality thermal paper
• Paper end sensor : Set up
• Cutter : No
• Near end sensor : No
• Paper roll dimension : 57.5 m0.5mm in width
Max. 80mm in diameter
• Paper quality : High-quality thermal paper
paper thickness: 0.06 to 0.08mm
0.167
(4.75) (4.75)48 (288 dots)
print area
(max.24 characters)
(units : mm)
57.5±0.5
(Paper dimension)
Model name of the drawer box SJ423
Size 420 (W) x 426 (D) x 114 (H) mm
16.5 (W) x 16.8 (D) x 4.5 (H) inches
Color Gray (PB-N8.0)
Material Metal
Bell —
Release lever Standard equipment: situated at the
bottom
Drawer open sensor —
Separation from the main unit —
Separation from the drawer Allowed
Separation of the bill compartments from the
coin compartments Allowed
Bill separator Allowed
Number of compartments 5B/6C
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
Built-in battery: Rechargeable batteries, memory holding time about 1
month (with fully charged built-in batteries, at room
temperature)
5B/6C
SK1-1
L
o
c
k
u
n
l
o
c
k

XE-A302U OPTIONS
– 4 –
CHAPTER 2. OPTIONS
1. OPTIONS (NO)
2. SERVICE OPTIONS (NO)
3. SUPPLIES
4. SPECIAL SERVICE TOOLS
CHAPTER 3. MASTER RESET AND PROGRAM RESET
1. MASTER RESETTING
Master resetting clears the entire memory and resumes initial values.
Master resetting can be accomplished by using the following procedure:
The master reset can also be accomplished in the following case.
In case power failure occurs when the machine has no battery
attached to it, the master reset operation is automatically performed
after the power has been restored.
(This is because if power failure occurs with no battery attached to
the machine, all the memories are lost and the machine does not
work properly after power recovery; this requires the master reset
operation.)
2. PROGRAM RESETTING (INITIALIZATION)
This resetting resumes the initial program without clearing memory.
This resetting can be operated at below sequence in PGM mode.
Note: In case power failure occurs when the machine has no battery
attached to it, the master reset operation is automatically per-
formed after the power has been restored.
NO NAME PARTS CODE PRICE
RANK DESCRIPTION
1 Thermal roll paper TPAPR6656RC05 BA 5 ROLLS/PACK
NO NAME PARTS CODE PRICE
RANK DESCRIPTION
1 RS-232 Loop-back connector UKOG-6705RCZZ BC
Procedure A: 1) Unplug the AC cord from the wall outlet.
2) Set the mode switch to the PGM position.
3) While holding down both the JOURNAL FEED key
and [CL] key, plugin the AC cord to the wall outlet.
Procedure: 1) Unplug the AC cord from the wall outlet.
2) Set the mode switch to the PGM position.
3) While holding down both JOURNAL FEED key and
RECEIPT FEED key, plugin the AC cord to the wall
outlet.

XE-A302U HARDWARE DESCRIPTION
– 5 –
CHAPTER 4. HARDWARE DESCRIPTION
1. BLOCK DIAGRAM
XE-A302U
CPU
MITSUBISHI M30620SAFP
(INTERNAL RAM 10KB)
EXTERNAL MEMORY
SRAM 512KB
FLASH ROM 512KB
SHARP LH28F004BVT
PRINTER
M-T53II
RS-232
1ch
Battery
Ni-MH
2. MEMORY MAP
2-1. ADDRESS MAP
2-2. EXTERNAL BUS
VH (8V)
VLED (5.7V)
VCC
VDD
VDRW (+23.8V)
VLMP (4.3V)
RS-232
CH1
EPROM
PRINTER
CPU
RAM 10k BYTE
A0~19
D0~7
DRIVER
,
SENSOR FRONT
2Line
LCD
KEY
&
SW
DRAWER1
/S0 9
DIG DRV
SEG DRV
KR0 KR7
BZ
12MHz
HC245
HC374
32.768kHz
HC375
HC245
4 to 16
Decoder
KR0 KR11
FROM
SRAM2
SRAM1
GAL
BR0~2
/CS0
/CS1,/CS2
HC
138
HIN
211
Pop up
LCD
HIN
211 Pop
up
7deg
LED
HC245
CH2
External BUS ACCESS SPEED
SRAM/EPROM/FLASH ROM ; 2 BCLK
External I/O ; 2 BCLK * 1BCLK = 83.3ns (at 12MHz)
SRAM /CS2 area:
/CS1 area BANK 0, 2:
/CS0 area BANK 0:
address 08000h ~ 27FFFh 128KB
address 28000h ~ 2FFFFh 32KB x 2
address 30000h ~ 3FFFFh 64KB
address 40000h ~ 7FFFFh 256KB
Reserve
/CS0 area BANK 4, 5: address 40000h ~ 7FFFFh 256KB x 2
FLASH
ROM
/CS0 area BANK 0 address 80000h ~ FFFFFh 256KB
(Moves to Bank 1 when
rewritten using EPROM)
Reserve /CS0 area BANK 6: address 80000h ~ FFFFFh 256KB
I/O /CS3 area BANK 0: address 04000h ~ 07FFFh 16KB
00000h
00400h
02C00h
04000h
08000h
28000h
30000h
40000h
60000h
80000h
C0000h
FFFFFh
Bank 0 Bank 1 Bank 2 Bank 3 Bank 4 Bank 5 Bank 6 Bank 7
BR1 00110110
BR2 11110000
BR0 1 1010100
SFR area
Internal RAM area 10KB
Internal reserved area
External I/O
External SRAM 1
128KB
External SRAM 1
256KB
External SRAM 1 32KB External SRAM 1 32KB
External SRAM 1 64KB
External SRAM 1 32KB External SRAM 1 32KB
(Phantom) (Phantom)
IPL SW
OFF:F-ROM F-ROM
(Program)
(512KB)
ON:EP-ROM
(Program)
(512KB)
External
SRAM 2
256KB
(Reserve)
External
SRAM 2
256KB
(Reserve)
External
SRAM 2
256KB
(Phantom)
External
SRAM 2
256KB
(Phantom)
Flash ROM
Program 256KB
Flash ROM
(CG Data)
(Reserve)
Not used
512KB
Flash ROM
(CG Data)
(Reserve)
Not used
512KB
Not used bank 4, 5 and bank 6, 7
Even if the bank is changed, the
same address can be accssed.
CS3
/CS2
/CS1
/RAMCS1
/CS0 /RAMCS2
Caution: The printer handler and so on should be
stored to C0000h or later.

XE-A302U HARDWARE DESCRIPTION
– 6 –
3. PRINTER CONTROL
3-1. STEPPING MOTOR CONTROL
The two phase Bi-Polar stepping motor is driven at a constant voltage
by SANYO LB1838M.
1step: 0.087mm, 1dot: 2step
< CPU’s PORT >
< Driving steps >
*When the motor is at rest, the same phase as the final excitation
phase is RUSH energize to turn off all phases. 3Turn ENA1 and
ENA2 into L.
No energizing should be allowed at lease 40 ms after stopping the
motor before restarting.
When starting the motor etc, required the chopping
3-2. HEAD CONTROL
HEAD: 288 dots in all, width: 0.167mm/dot (6dot/mm)
<Related PORT>
Conduction pulse width: Refer to the M-T53II specifications.
*When turning on or off the printer power supply, make sure to turn
/STB1, 2 to “H”.
*Do not turn on without paper.
*THERMAL HEAD power supply control : Turns ON when P105= “H”;
turns OFF when “L”. (The power supply for HEAD and STEPPING
MOTOR is shared). When printing is finished (when the motor is
stopped) Athe power should be turned OFF.
*Before printing or feeding paper, perform A/D conversion in 20 ms
after the printer head is turned ON and make sure the voltage is sta-
ble.
(The power supply of the printer head should be turned ON and OFF
by using the regulator IC.)
*The head rank confirmation was abolished.
3-3. WINDING MOTOR CONTROL
<Related port>
3-4. PAPER EMPTY DETECTION
When LOW is detected twice continuously in sampling of signals for
every one dot line, it is judged as paper empty.
The threshold level of High/Low level is 2.5 m0.2V. (Vcc = 5VDC m5%)
When paper empty is detected, printing is terminated. However, when
paper empty is detected during printing, 15-dot lines from detection of
paper empty can be printed.
3-5. PLATEN OVER
When signals are sampled in the frequency of 1ms or less and open
state is detected twice continuously, it is judged as platen over.
If the head is conducted under the platen over state, the thermal head
life may be shortened. When, therefore, platen over is detected, printing
is terminated.
Under the platen over state (switch open state), driving the paper feed
motor is inhibited.
No. CPU PORT Signal to be used
76 P14 IN1
75 P15 IN2
74 P16 ENA1
73 P17 ENA2
Driver IC input
(CPU output) Motor driving signal
STEP IN1 IN2 ENA1 ENA2 A
(OUT1) B (OUT3) /A (OUT2) /B (OUT4)
1LLHHH H L L
2HLHH L H H L
3HHHH L L H H
4 LHHH H L L H
No. I/O PORT Function Signal
name Initial value
Portsetup
in single
chip mode
18 OUT P84 PRINTING
/STB2 HOut L
89 OUT P107 PRINTING
/STB1 HOut L
30 OUT P70 TXD2 PRINTING DAT
(Print DATA) HOut L
28 OUT P72 CLK2 PRINTING PCLK
(Transfer Clock) Out L
90 OUT P106 PRINTING /LAT
(DATA Latch) HOut L
91 OUT P105
PRINTING
VPON (Head
motor POWER
SUPPLY)
LOut L
/STB1: 1 ~ 144 dot: 144 dots in all Total 288 dots
/STB2: 145 ~ 288 dot: 144 dots in all
OFF time of print strobe : Conduction strobe OFF time between dots
min. 160us
Logo print ratio restriction : Average print ratio 35% or below (Same as
the M-T51)
When the print ratio at the peak one-dot
line is 50%, the average print ratio of 10-
dot line including the above line should be
35% or less.
No. I/O
PORT Function Signal
name Initial
value Port setup in singlechip mode
21 Out P81 Printer motor
(Winding motor) LON
1 288

XE-A302U HARDWARE DESCRIPTION
– 7 –
4. CPU
• M16C/64A Group: M30620SAFP
• Processor mode = Microprocessor mode
• Internal reserve area, without expansion
• Multi function 16-bit Timer: Output system 5 lines + input system 6 lines
• Serial I/O:
M16C/64A PORT MEMORY SPACE: NORMAL MODE
PROCESSORMODE:MICROPROCESSORMODE
It is used by (SEPARATE BUS 8bit Width)
PORT PIN
No. I/O Pin name Signal name Initial value OFF MODE Function PORT PIN No. I/O Pin name Signal name Initial value OFF MODE Function
P00 88 I/O D0 D0 Out L P54 42 O /HLDA (NU) Out L
P01 87 I/O D1 D1 Out L P55 41 I /HOLD /HOLD In
P02 86 I/O D2 D2 Out L P56 40 O ALE (NU) Out L
P03 85 I/O D3 D3 Out L P57 39 I /RDY /RDY In
P04 84 I/O D4 D4 Out L P60 38 O /RTS0 /RS2 H In RS-232 /RS2
P05 83 I/O D5 D5 Out L P61 37 O CLK0 N.U. (FSCK) L Out L FMC DSCK
P06 82 I/O D6 D6 Out L P62 36 I RXD0 RD2 In RS-232 RD2
P07 81 I/O D7 D7 Out L P63 35 O TXD0 SD2 L Out L RS-232 SD2
P10 80 O P10 /PLCS H Out L Pop up LCD
Chip Select P64 34 O /RTS1 /RS1 H Out L RS-232 /RS1
P11 79 O P11 /PLRD H Out L Pop up LCD
Read clock P65 33 I P65 IPL ON In IPL ON Signal
P12 78 O P12 /PLWR H Out L Pop up LCD
Write clock P66 32 I RXD1 RD1 In RS-232 RD1
P13 77 O P13 PLDATA L Out L Pop up LCD
serial DATA P67 31 O TXD1 SD1 H Out L RS-232 SD1
P14 76 O P14 IN1 L Out L Paper feed
motor (IN1) P70 30 O TXD2 DAT L Out L PRINTER DATA OUT
P15 75 O P15 IN2 L Out L Paper feed
motor (IN2) P71 29 I RXD2 N.U. (BUSY) In PRINTER DATA IN
P16 74 O P16 ENA1 L Out L Paper feed
motor (ENA1) P72 28 O CLK2 PCLK L Out L PRINTER CLOCK
P17 73 O P17 ENA2 L Out L Paper feed
motor (ENA2) P73 27 O P73 DRAWER 1 L Out L DRAWER DRIVE SIGNAL
P20 72 O A0 A0 Out L P74 26 O P74 /ER1 H Out L RS-232 /ER1
P21 71 O A1 A1 Out L P75 25 I P75 /CD1 In RS-232 /CD1
P22 70 O A2 A2 Out L P76 24 I P76 /CS1 In RS-232 /CS1
P23 69 O A3 A3 Out L P77 23 I P77 /DR1 In RS-232 /DR1
P24 68 O A4 A4 Out L P80 22 O P80 BUZZER L Out L
P25 67 O A5 A5 Out L P81 21 O P81 MOTOR L In Printer winding motor
P26 66 O A6 A6 Out L P82 20 I /INT0 /POFF In Power interruption
P27 65 O A7 A7 Out L P83 19 O /INT1 /WP H Out L FROM /WP
P30 63 O A8 A8 Out L P84 18 O P84 /STB2 H In PRINTER /STB2
P31 61 O A9 A9 Out L P85 17 I /NMI (NU) In
P32 60 O A10 A10 Out L P86 11 O
XCOUT XCOUT 32.768kHz
P33 59 O A11 A11 Out L P87 10 I XCIN XCIN 32.768kHz
P34 58 O A12 A12 Out L P90 7 I P90 MDR In MODE KEY SENSE
P35 57 O A13 A13 Out L P91 6 I P91 MSENS In MISCELLANEOUS SENSE
P36 56 O A14 A14 Out L P92 5 O P92 BR1 L Out L BANK signal1
P37 55 O A15 A15 Out L P93 4 O P93 BR0 L Out L BANK signal0
P40 54 O A16 A16 Out L P94 3 O P94 /LDCS H Out L LCD DATA LATCH signal
P41 53 O A17 A17 Out L P95 2 O P95 BLON L Out L BACK LIGHT ON
P42 52 O A18 A18 Out L P96 1 O P96 LCDON L Out L LCD POWER ON
P43 51 O A19 A19 Out L P97 100 O P97 BR2 L Out L BANK singal2
P44 50 O /CS0 /CS0 Out H P100 97 I AN0 TM In HEAD temperature monitor
P45 49 O /CS1 /CS1 Out H P101 95 I AN1 VPTEST In HEAD voltage monitor
P46 48 O /CS2 /CS2 Out H P102 94 I AN2 VREF In Referance voltage
P47 47 O /CS3 /CS3 Out L External I/O
Chip Select P103 93 IAN3 VBAT In VBAT (Battery voltage)
P50 46 O /WR /WR Out L P104 92 O AN4 /ER2 H In RS-232 /ER2
P51 45 O /BHE (NU) Out L P105 91 O P105 VPON L Out L PRINTER HEAD POWER
P52 44 O /RD /RD Out L P106 90 O P106 /LAT H In PRINTER DATA LATCH
P53 43 O BCLK BCLK Out L P107 89 O P107 /STB1 H In PRINTER /STB1

XE-A302U HARDWARE DESCRIPTION
– 8 –
<Power supply/CONTROL pins>
5. KEY-DISPLAY
5-1. LCD CONTROL
Basically the same as the XE-A401 and ER-A275P.
<LCD-related registers>
< LCD Control Signal / Key Strobe Signal >
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
< Data Latch Signal >
L : LCD write data latch
5-2. KEY/DISPLAY SCAN
On the machine, the key and display scan signal is common.
KEY/display SCAN and key read should be performed at the following
timing.
1KEY/display SCAN cycle: 10ms
2Blanking time: 50us
3KEY DATA READ timing: More than 10 ms from the fall of the SCAN
signal
<Key/Display-related registers>
< LED Segment Signal >
…
……
…
Wite
< LCD Control Signal/Key Strobe Signal >
…
……
…
Write
Bit3 ~ 0 : KS3 ~ 0
Strobe signals for keys and POP UP Display are generated at KS3 - 0.
< Key Return Signal >
…
……
…
Read
Normal Keyboard : 04003h
Flat Keyboard : 04001h + 04003h
PORT PIN
No. I/O Pin name Function PORT PIN
No. I/O Pin name Function
BYTE 8 I BYTE Connected to VDD Vcc 62 Vcc Connected to VDD
CNVss 9 I CNVss Connected to VDD Vss 64 Vss connected to GND
/RESET 12 I /RESET AVss 96 AVss Connected to GND
Xout 13 O Xout OPEN Vref 98 Vref Connected to VDD
Vss 14 Vss Connected to GND AVcc 99 AVcc Connected to VDD
Xin 15 I Xin connected to Spectram diffusion IC
Vcc 16 Vcc Connected to VDD
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
Function Address R/W
LED Segment Signal 04000h W
LCD Control Signal / Key Strobe Signal 04003h W
Key Return Signal 04003h 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 - E R/W RS KS3 KS2 KS1 KS0
Address Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
04001h - - - -
KR11 KR10 KR9 KR8
04003h KR7 KR6 KR5 KR4 KR3 KR2 KR1 KR0

XE-A302U HARDWARE DESCRIPTION
– 9 –
5-3. KEYSCAN MATRIX
PENDING
Others
5-4. DISPLAY (PENDING)
The machine has an LCD display, 5 x 7 dots, 2 lines, 16digits, at the
front side and a 7-digit LED at the pop-up side
FRONT:
POP UP:
• Display DIGIT signal
The above ST0 ~ ST6 are display digit signals.
ST0: 1st digit ~ ST6: 7th digit
• Display SEGMENT signal
The LED segment signal is outputted by writing SEGMENT data in
the /CS3 space.
Correspondence of DATA ~ SEGMENT
D0 ~ D6 3a ~ g
D7 3DP
6. POWER SUPPLY
7. REWRITING FLASH MEMORY
IPL from EP-ROM: After IPL SW is set to ON side the program is
started from EP-ROM by turning on the power.
The program on EP-ROM is transferred to flash
ROM by switching the banks through S-RAM.
IPL from COM: Data from the PC is written to flash ROM through
the COM port. (Max. 38.4 kbps)
8. DRAWER
The machine has a 1 channel of drawer port.
No open sensor is provided.
The driving time for the DRAWER solenoid are as follows:
50ms (max) 45ms (min)
CPU STO ST1 ST2 ST3 ST4 ST5 ST6 ST7 ST8 ST9
MODE P90 SRV PGM Time REG MGR X1/Z1 X2/Z2 KEYBD
Others P91 PF HEAD
UP PE DRAWER OPEN RS-232 CI1
KEYBD : 1=Normal Keyboard/0=Flat Keyboard
HEAD UP : 1=Up/0=Down
PE : 1=Paper End/0=Paper Not End
DRAWEROPEN : Reserved (1=Open/0=Close)
RS-232 CI1 :
No. I/O PORT Function Signal Name Initial value
27 OUT P73 Drawer Drive Signal L
LM2574
+ Tr.
Drawer
VLED 5.7V
VCC
PRINTER HEAD MOTOR
VDD
VDRW 24V
5V
5V
VH 8V
Batterry
TRANS. PQ1CG203
PQ1CG203
(MODE SW, /POFF, CPU P105)
BA00ASFP
VLMP 4.3V
LCD
After detection of /POFF, power interruption must be executed within 10ms.
/POFF
detection point ON/OFF control (MODE SW)
ON/OFF control
Winding motor

XE-A302U HARDWARE DESCRIPTION
– 10 –
9. A/D CONVERSION
The machine has the following four signals at the A/D conversion ports.
<CPU’s PORT>
1Printer head temperature monitor
A voltage divided by the printer head temperature monitoring ther-
mistor and the resistor is inputted to AN0 pin.
Printer head conduction must be controlled as shown below. For
the printer head conduction time, refer to the M-T53II specifica-
tions.
2Printer head voltage monitor
A voltage supplied by the printer head power through the printer
and divided by the resistor is inputted to AN1 pin. The A/D conver-
sion value is read after turning the VPON signal (CPU P105) to
HIGH and stabilizing the voltage (20msec).
The print enable voltage range is 7.5V ~ 8.0V (A/D value: ??? ~
???). The voltage is calculated from the AN1 value and the A/D
conversion value of the AN2 reference voltage. For the calculation
method, refer to the M-T53II specifications.
3Reference voltage
The CPU power VDD is used as the reference voltage.
4Battery remaining voltage
10. BUZZER
PIEZO type BUZZER
The oscillating frequency is 4.0kHz m0.5kHz
11. RESET
The RESET signal is canceled when the power source of the device
which used the 5V system (VCC, VDD, VLED) reaches the operating
voltage.
The RESET signal is generated under the following conditions.
1) When the mode key switch is set from SRV' to another position
(except for OFF position).
2) When the power is turned on after 5sec or more from turning off the
power and the VCC reaches 5V.
3) When the mode key switch is set from OFF position to another posi-
tion (except for SRV’ position) and VCC reaches 5V. (If the OFF
time is within 5sec, the RESET signal may not be supplied.)
12. POFF
The POFF signal is changed from 0 to 1 when the 5V power and the
24V power reach the operating voltage level. When they fall below the
operating voltage level, the POFF signal is changed from 1 to 0.
<POFF, RESET TIMING CHART>
In the model where a dry cell is used as the bakc-up battery, the CPU
monitors the battery voltage when it operates. When the voltage falls
below 2.8V, the RESET signal is supplied to prevent against malfunc-
tion of the CPU.
No. CPU
PORT Signal name FUNCTION
97 AN0 TM PRINTER HEAD temperature monitor
95 AN1 VPTEST PRINTER HEAD voltage monitor
94 AN2 VREF Refarence voltage
93 AN3 VBAT VBAT (Battery voltage)
HEAD
tempreture A/D conversion value (DEC) Operation
-10°C or below 929~1023 MOTOR LOCK
-10°C ~ 0°C 869~928 Print in conduction time at 0°C
0°C ~ 70°C 232~868 Print in conduction time specified
in the PR-45M specifications.
70°C or above 0~231 MOTOR LOCK
NO BATTERY 3.0V
LOW BATTERY 3.3V
+5V
+24V
/
POFF
4.5V
20.8V
POWER ON POWER OFF
MOMENTARY
STOP

XE-A302U DIAGNOSTIC PROGRAM
– 11 –
CHAPTER 5. DIAGNOSTIC PROGRAM
1. TEST ITEMS
The test items are as follows:
*Starting DIAG.
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:
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:
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 display test
8) 110 Drawer 1 open & sensor test
9) 120 External RAM test
10) 121 CPU internal RAM test
11) 130 FLASH ROM test
12) 160 AD conversion port test
13) 500 RS232C test
Mode switch: PGM
Key operation: Above code + “RCPT/PO” key
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 incorrect
manner, --- will be displayed.
RCPT/PO
DISP BUZZER PGM
0123456789ABCDEF
OP display
Rear display 4.5.6.7.8.9.0.
RCPT/PO
KEY CODE PGM
OP display
KEY CODE

XE-A302U DIAGNOSTIC PROGRAM
– 12 –
3) PRINTER TEST
1Key operation
102 3
2Test procedure
At the receipt setting, the logo is also printed and the receipt is
issued.
3Check:
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 (TL) 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:
“–“ 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.
When the test ends normally: 104
When an error occurs:
(xxxx is the value which added the key code.) E – – xxxx 104
RCPT/PO
PRINTER PGM
OP display
3 lines of 24 digits are printed.
ZZZZZZZZZZZZZZZZZZZZZZZZ
ZZZZZZZZZZZZZZZZZZZZZZZZ
ZZZZZZZZZZZZZZZZZZZZZZZZ
RCPT/PO
KEY BOARD PGM
OP display
KEY CODE
104
When the test ends normally 105
When an error occurs: E – ~ – 105
X: 1 - Paper present
O - No paper
Y: 1 - Thermal head down
O - Thermal head up
RCPT/PO
MODE
105 SW X
PGM
OP display
MODE: PGM_ _ _OP X/Z_REG_MGR_X1/Z1_X2/Z2__PGM
X : 1 2 OFF 3 4 5 6 7 1
RCPT/PO
H/P SENSOR PGM
XY
OP display
106
RCPT/PO
TIM CHECK PGM
OP display
Hour
Blinks at an interval of 0.5 sec.
Min. Sec.
ER
107YYMMDD hhmmss
yearmonthday
hour min. sec.

XE-A302U DIAGNOSTIC PROGRAM
– 13 –
8) DRAWER 1 OPEN & SENSOR TEST
1Key operation
110 3
2Test procedure
3Check:
A) The drawer 1 opens normally.
B) The sensor correctly indicates the status of the drawer 1.
*On the XE-A302U, “C” (CLOSED) is always displayed, because
the sensor is not equipped.
4End of testing
You can exit the test mode by pressing any key. The printer prints
the following.
110
9) EXTERNAL RAM TEST
1Key operation
120 3
2Test procedure
The standard 512 Kbyte RAM is checked.
The contents of memory must be stored before and after this test.
RAM (Bank0: 08000H~7FFFFH area, Bank2: 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, 20000H,
28000H (Bank0), 28000H (Bank2),
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 *****.
10) 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 *****.
When the test ends normally: 120
When the test end abnormally: Ex – ~ –
***** 120
x = 1: Data error, x = 2: Address error
RCPT/PO
DRAWER PGMX
OP display
X : O = DRAWER OPENED
C = DRAWER CLOSED
1
RCPT/PO
RAM PGM
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
RCPT/PO
RAMCPU PGM
OP display 121

XE-A302U DIAGNOSTIC PROGRAM
– 14 –
11) FLASH ROM TEST
1Key operation
130 3
2Test procedure
The test program checks that the checksum of the flash ROM
(Bank0: F80000H ~ 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 fol-
lows:
12) AD CONVERSION PORT TEST
1Key operation
160 3
2Test procedure
The test program displays the voltage of each AD conversion port.
13) RS232C TEST
Install the RS232C 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 is performed between SD and RD.
DATA: $00 - $FF BAUD RATE: 9600 BPS
3Check:
The completion print.
4End of testing
3. KEY CODE TABLE
When the test ends normally: 130
ROM ******** (Model name)
******** (Version)
When the test ends
abnormally: E
– – ~ – –
130
ROM ******** (Model name)
******** (Version)
RCPT/PO
ROMFLASH PGM
OP display 130
RCPT/PO
TM PGM
OP display
Display
160 =
VRF PGM
OP display 160 =
VPTEST PGM
OP display 160 =
End of testing
OUTPUT INPUT
/ER /RS /DR /CI /CD /CS
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
500
Error print RS TEST **NG**ERxx
500
xx Contents of error
01 ER DR error
02 ER CI error
03 RS CD error
04 RS CS error
05 SD RD error DATA error
06 SD RD error DATA error/framing error
RCPT/PO
RS TEST PGM
OP display 500
232C
098
112
119
087
071
151
007
032
096
135
082
146
034
023
048
103
130
066
050
017
018
055
113
129
081
145
001
002
039
097
131
083
147
019
003
033
115
116
068
148
052
020
049
051
132
086
054
036
004
065
084
118
150
038
022
006
035
100
134
070
053
021
005
067
102
085
069
149
037
024
099
101
104
072
152
040
008
133
117
136
088
056
025
009
120
089
073
153
057
041
010
121
105
122
154
058
042
026
138
106
090
074
075
059
043
155
107
123
139
091
027
011
128
064
080
144
016
000
CHECK SUM :
XE-A302U
9038

XE-A302U IPL FROM EP-ROM
– 15 –
CHAPTER 6. IPL FROM EP-ROM
The application program of the XE-A302 is written into the Flash ROM
in the CPU.
Since the CPU supplied as a service part does not include the applica-
tion program in it, the application program must be written when the
CPU is replaced with a new one.
To write the application program into the Flash ROM, connect the PC
and the XE-A302 with an RS-232C cable, and execute the PC software.
*Use a D-Sub 9pin cross cable employed in conventional communica-
tion between ECR-ECR (See APPENDIX: RS232C CABLE).
[Related parts/Tool]
[IPL PROCEDURE]
1) Connect the XE-A302 and PC with an RS-232C cable.
<XE-A302 side>
2) Turn off the AC Power. (& remove batteries.)
3) Open the cabinet.
4) Change the IPL JUMPER PIN (SP1) to the rear side.
5) Close the cabinet.
6) Turn on the AC Power.
(At this time, ECR looks like inactive, but ECR waits the ROM data
from PC.)
<IPL software on PC>
7) Copy the following files in "PosUtilityTool3" into the hard disk of PC.
Postool3.exe
A302u.ROM
8) Boot "Postool3.exe."
9) Push [Add Files] in the screen.
10) Select the ROM DATA file. (File name: A302u.ROM)
11) By pushing [Send] in the screen, the ROM data is sent from PC to
ECR.
The address counter is shown on PC and counts up.
12) After about 3-minuites, the message "Complete" is shown on PC.
<After booting>
<After pushing "Add Files">
*1 COM Port is selectable between COM1 and 2.
*2 For "Send Type", select "Direct".
*3 Do not select "Extra Setting".
<XE-A302 side>
12) Turn on the AC Power.
13) Open the cabinet.
14) Change the Jumper PIN (SP1) to the front side. (default position)
15) Close the cabinet.
16) Turn on the AC Power.
Master Reset will be performed. If not, power off the XE-A302, wait
1miniute and turn on the power again.
PARTS NAME PARTS CODE LOCATION
No.
CPU (without application
program) VHI30624FGA-1 IC5
PosUtilityTool3 Software
<Main PWB>
Default
SP1 SP1
When IPL

XE-A302U CAUTION TO BE USED WHEN CONNECTING THE RS-232 CABLE
– 16 –
APPENDIX: RS232C CABLE
The RS-232C cable has the following internal connections:
(Equivalent to a cross cable used in the conventional connection of
ECR-ECR)
SD : TRANSMITTED DATA
RD : RECEIVED DATA
DTR : DATA TERMINAL READY
DSR : DATA SET READY
RTS : REQUEST TO SEND
DCD : DATA CARRIER DETECTOR
CTS : CLEAR TO SEND
CHAPTER 7. CAUTION TO BE USED
WHEN CONNECTING
THE RS-232 CABLE
When connecting the RS-232 cable to the XE-A302, be sure to observe
the following condiiton:
SD 3 SD
RD
CTS
RD
2
6
8
3
2
6
8
55 SG
RTS
7
DCD
1
DTR 4
DSR
7
1
4
CTS
SG
RTS
DCD
DTR
DSR
9PIN D-SUB 9PIN D-SUB
Use RS-232 cable (with core) of accessories.
[This is a necessary to support the EMI (Electronics Magnetic
Interface).]
RS-232 CONNECTOR
Use RS-232 cable
(with core) of
accessories.

XE-A302U CIRCUIT DIAGRAM AND PWB LAYOUT
– 17 –
PLACE NEAR CPU!!!
7pin:GND
7pin:GND *IC3 14pin:VDD
150pF*10(C1-C10)
100pF*8(C24-C31)
150pF*8(C11-C18 )
NOT INSTALL INSTALL
<- OR ->
SII
*IC4 14pin:VDD
RAM1
/RDY
VREF
P91 P90
BUSY
VREF
BUZZER
D6 D5
D1
D4
D0 D7
D3
D2
A16
A9 A13
/RAM1
A12
A4 A11 A6 A5 A0 A2
A18
A7
A14
A[0..19]
A10 A8
A1 A3
/RAM1
/CS1 /CS2 /CS0
D[0..7]
BLON3 LCDON3
INI2 INI1
D62,3
/PLCS3 /PLRD3 /PLWR3 PLDATA3
ENA24 ENA14
BUSY
/LDCS3
/LAT4 VPON4,5
BR02 BR12
/STB14
/RS2 6
/RDY
/RS1 6 /CD1 6 /DR1 6
RXD2 6 TXD2 6
RXD1 6 TXD1 6 /CTS1 6
/POFF 3,5
A32,3
VPTEST4
TM4
A8 2 A12 2 A13 2 A14 2 A15 2 A16 2 A17 2 A18 2 A19 2
/CS0 2 /CS1 /CS2 /CS3 3
/WR 2,3 /RD 2,3
P913,4,6 MDR3
DAT 4 PCLK 4
DRAWER1 3 /ER1 6
/STB2 4
/WP 2
VBAT5
/RES 2,3,4/RESET3
/ER26
BR22
IPLON 2
MOTOR 4
/RD 2,3 /WR 2,3
D32,3
A62
FRA20/SRA17 2
A22
A72
D72,3 D22,3
A52 A10 2
D12,3 D02,3 D52,3
A9 2
A12,3
D42,3
A42 A11 2
FRA19/SRA15 2
A02,3
RAMCS12
VDD
VCC VCC
VCC VCC
VCC VCC
VCC
VCC
VCC
VDD
VDD
VDD
VCC
VCC
VCC
VCC VCC
VDD
VDD
VDD
VDD
VDD
C38 0.1uF
C5
R1 10K
R50 100 R44 100
R76
(2.2K)
R45 100
R7 10K
C27
R2 10K
R13 10K
R8 10K
R62 47K
R54 10k
R28 10K
C35 100pF
C17
R43
10K
R49 100
C31
C23 30pF
C46 (0.1uF)
R22 10K
C1 C6
R67 10K
R3 10K
R23 10K
C7
R63 10K
R59 47K
R58 10K
C37
(330pF)
C26
+
C39
(10uF/50V)
C25
R24 10K
IC3B 74LV10A
3 4 56
R14 10K
R78
47K
R64
10K
R9 10K
C18
R29 10K
R30 10K
R48 100
C8
R47 100
R66
240
X2
(CST12.0MTW)
23
1
R35 10K
C20
150pF
C34
100pF
C33
100pF
IC5
KIA431A
K
A
R
C2
C30
R4 10K
D1
(1SS355)
AK
C50
1000pF
C36330pF
C24
IC4C 74LV00A
9
10 8
C1A 1000pF
R51 100
R20
10K
IC2
M30620SAFP
81
80
82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99
100
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
D7
D8
D6 D5 D4 D3 D2 D1 D0 AN7 AN6 AN5 AN4 AN3 AN2 AN1 AVSS AN0 VREF AVCC SIN4
SOUT4
CLK4
TB4IN
TB3IN
SOUT3
SIN3
CLK3
BYTE
CNVSS
XCIN
XCOUT
RESET
XOUT
VSS
XIN
VCC
NMI
INT2
INT1
INT0
TA4IN/U
TA4OUT/U
TB3IN
TBEOUT
TA2INW
TA2OUTW
TA1IN/V
TA1OUT/V
TB5IN
TB5OUT
D9
D10
D11
D12
D13
D14
D15
A0
A1
A2
A3
A4
A5
A6
A7
VSS
A8
VCC
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
CS0 CS1 CS2 CS3
WR
BHE
RD
CBCLK
HLDA
HOLD
ALE
CLKOUT
RTS0 CLK0
RXD0
TXD0
CLKS1
CLK1
RXD1
TXD1
R40 47K
C19
100pF
R31 10K
R46 100
+
C49 10uF/10V,OS
C12
C9
IC6
S-80928ANMP
2 3 15
4
VDD VSS OUT CD
NC
R60 47K
R80
3.3K
R15 10K
R38 10K
R10 10K
C32 100pF
R25 10K
R41 47K
R77 (12K)
C3
C11
R5 10K
C29
C40
1000pF
IC3A 74LV10A
1 2
13 12
R39 10K
R32 10K
B+
BZ2
(2048BH)
R56
10K
X3
CST12.0MTW
23
1
R37 10K
C13
C10
IC7 FS781
1 2 3 45
6 7 8
XIN XOUT S1 LF VSS
FSOUT
S0
VDD
R16 10K
C4
B+
BZ1 PIEZO BZ
R61 47K
R11 10K
C28
+
C42
10uF/50V
R27 10K
C45 27pF
R71
100K
C22 100pF
R79
820
R74 330
R72 (0)
IC4A 74LV00A
1 23
X1
32.768KHz
C44 18pF
R33 10K
R68 10K
C21
150pF
R36 10K
C14 C15
R17 10K
R42 10K
R73 470
C48 0.1uF
R6 10K
C51 330pF
R12 10K
C43
0.1uF
Q1
C2412K
B
EC
R75 33
R70
47K
R34 10K
C16
R26 10K
C41
1000pF
IC4B 74LV00A
4 56
R65 10K
C47
2200pF
IC1
4MSRAM HY628400ALLT2-70
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
A18 A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND
VCC
A15 A17
WR
A13
A8 A9
A11
RD
A10
CS
D7 D6 D5 D4 D3
R18 10K
A B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A
1/7
CPU
CHAPTER 8. CIRCUIT DIAGRAM AND PWB LAYOUT

XE-A302U CIRCUIT DIAGRAM AND PWB LAYOUT
– 18 –
1 ROM COPY
7Pin GND
IC13 14Pin VDD
RAM2
/RASPN2(NU )
for XE-A202J/A212J
for XE-A212V,XE-A302U/A
/WR
/RAM2
/RD
/ROMCS FRA19/SRA15 FRA18
IPLON RAMCS2
FRA20/SRA17
/RES
/RES
/WP /WP
/RD
/RD
/FRCS /WR
/RD
D1 D1
A16
A1
A1
D3
A3
D0
A17
A17 A12
A5
A5
D6
A8
A19
A14
A18 A1 A1
D0
A7
A11
D5
A16
A18
D3
D7
A12
A13
A13
A11
D5
D1
A17
A7 A0
A0
A5 A16
D1
A2
A2 A3
D7
A7
D5
D4
A14
A2
D7
A9 A9
D6
A15
A6
D7 D2
A9
A17
A12
A11
D6
A14
/RD
A6
A13
D6
A4
D4
D2
A14
D3
A17
A12 A11
A4
D2 D2
A10
A8
D4
A18 A10
A10
A0
A0
D0
A7
A8
A15 A16
A16
A6
A6
A2
D3
A13
A15
A15
A4
A15
/WR
A3
A3
A10
A9
A8
D5
D4
/WR
D0
A5
A4
BR0
/FRCS /RAM2
RAMCS2
FRA19/SRA151 FRA20/SRA171
IPLON1
BR21 BR11 BR01
/RD1,3 /RES1,3,4
/CS01
/WR1,3 /WP1
D[0..7]1,3 A[0..19]1,3
1 FRA19/SRA15
RAMCS1 1
VCC
VDD
VCC
VDD
VDD
VCC
VCC
VCC
VCC VCC
VCC
VCC
VCC VDD
C62
0.1uF
R84
0
IC13C 74LV00A
9
10 8
R85
0
IC13A 74LV00A
1 23
IC9 LH28F004SUT-NC80
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20
40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21
A16 A15 A14 A13 A12 A11 A9 A8 WE# RP# VPP WP# A18 A7 A6 A5 A4 A3 A2 A1
A17
GND
NC NC
A10
DQ7 DQ6 DQ5 DQ4 VCC VCC
NC
DQ3 DQ2 DQ1 DQ0
OE#
GND
CE#
A0
IC3C 74LV10A
9
10 11 8
C59
N.U. (100pF)
IC13D 74LV00A
12 13 11
IC11 4MRAM HY628400ALLT
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
A18 A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND
VCC
A15 A17
WR
A13
A8 A9
A11
RD
A10
CS
D7 D6 D5 D4 D3
R87
0
+
C57
10uF/50V
C54
0.1uF
R89 10K
S1
IPL SW SSS312
21
3
R86 0
IC10 PAL16V8H
1 2 3 4 5 6 7 8 9
10 11
12 13 14 15 16 17 18 19 20
CLK/I0 I1 I2 I3 I4 I5 I6 I7 I8 GND OE/I9
I/O0 I/O1 I/O2 I/O3 I/O4 I/O5 I/O6 I/O7
VCC
+
C53
10uF/50V C60
220pF
C132
100pF
C65
100pF
C61
100pF
IC13B 74LV00A
4 56
R81 10K
IC12 ROM SOCKET(32Pin)
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32
VPP A16 A15 A12 A7 A6 A5 A4 A3 A2 A1 A0 D0 D1 D2 GND D3
D4 D5 D6 D7
CE
A10
OE
A11
A9 A8
A13 A14 A17
A18/PGM
VCC
IC8 (LH28F016SUT) 16M FLASH ROM
32 28 27 26 25 24 23 22 20
52 33 35 38 40 44 46 49 51 34 36 39 41 45 47 50 9 43 37
21 42 48 19 18 17 13 12 11 10
8 7 6 5 4
14
2
54 55 56 16 53 31
115
3 29 30
A0 A1 A2 A3 A4 A5 A6 A7 A8
DQ15
DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 DQ8 DQ9
DQ10 DQ11 DQ12 DQ13 DQ14
VCC VCC VCC
GND GND GND A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 CE0 CE1 OE WE WP RP RY/BY BYTE 3/5 VPP
NC NC NC
C64
0.1uF
+
C2A 10uF/50V
+
C63
10uF/50V
C52
0.1uF C56
N.U.(0.1uF)
C58 0.1uF
+
C55
10uF/50V
A B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A
2/7FLASH ROM

XE-A302U CIRCUIT DIAGRAM AND PWB LAYOUT
– 19 –
*IC19 2 0Pin:VCC
10Pin:GND
*IC14 GND:10pin VCC:20pin
FOR POP UP & KEY I/F
FB1,2,3:JUMPER WIRE
DRAWER1
STANDARD
RIGHT-ANGLE CON
STRAIGHT CON
-->PATTERN SHART
for 2 Line LCD I/F
for Rear LCD I/F
SK423
B16B-XH-A
40FE-BT-VK-N
A0 A1 /LE0W
/LE1W /LE1W
/WR
/LE3W
/LE0R /LE1R
/CS3
A3 /LE2R
BLON
/LE2R
/LE1R
EE RS
/LE3R KR0
KR1 KR2 KR3 KR4 KR5 KR6 KR7
/LE0R
D[0..7]
/RESET
P90
/S9 /S2 /S4
c dp e b
/S3 KS2 KS0
g a
KS3 /S6 KS1
d f
KR4 KR6 KR7 KR3 KR1 KR5 KR0 KR2
P91
KR10 KR11 KR8 KR9
KS1 KS0 KS2 KS3
KR8 KR10 KR9 KR11
LCDON
K
R/W
EE R/WR/W RSRS
VCC
DB[0..7]
DB3 DB4
DB6 DB6
DB6
DB1 DB3 DB4
DB1
DB2
DB1
DB5 DB0
DB2 DB0
DB7
DB0
DB3
DB5 DB7
DB4 DB2
DB7 DB5
P91
/VON
D5
d cD2 dpD7
D4
D7 D3
D5
D4 D2 D0 D0
b
D4
D2
D6
D0 D1 D3
D2
e
D1 D3
D1
D1 D2
D5
D1
D0
D1 D7 D0
a
D3 D3
D3
GND
D0 D5
/LD0W
D7
D5
D7
D0
gD6
D3
D6
D6
D6
f
D4
D2
D2
D1
D4
/S6
A01,2 A11,2
/CS31 A31,2 /WR1,2
/LDCS1
BLON1
/POFF 1,5 /RES 1,2,4
/RESET1
MDR1 P911,4,6
/S96 /S2 /S44 /S34 /S6
/CTS26 /DR26 /CD26 /CI26
LCDON1
P911,4,6
/S6
PLDATA1 /PLWR1 /PLRD1 /PLCS1
/VON5
D[0..7]1,2
DRAWER11
VCC VCC VCC
VCC
VLED
VCC
VCCVLED
VDRW
VCC
VCC VCC
VCC
VCC
VCC
VCC
R102 22K
C81
0.1uF
C72
100pF
+C76
22uF/10V,OS
+C68
10uF/50V
C69
0.1uF
R103 4.7K
IC15
74HC374
1 2 3 4 5 6 7 9
10
8
20 19 18 17 15 16 14 13 12 11
QE Q0 D0 D1 Q1 Q2 D2 Q3 GND D3
VCC
Q7
D7 D6
Q5 Q6
D5 D4
Q4
LE
IC20 74HC374
1 2 3 4 5 6 7 9
10
8
20 19 18 17 15 16 14 13 12 11
QE Q0 D0 D1 Q1 Q2 D2 Q3 GND D3
VCC
Q7
D7 D6
Q5 Q6
D5 D4
Q4
LE
C83 0.1uF
Q3 KRC111S
B
EC
R94
10K
CN4
R-LCD CN
1 2 3 4 5 6
IC14 74HC273
3 4 7 8
13 14 17 18 11
1
2 5 6 9 12 15 16 19
D1 D2 D3 D4 D5 D6 D7 D8 CLK CLR
Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8
FB3
(JUMPER)
+
C134 10uF/16V
C66 0.1uF C67
0.1uF
CN6
DR CN(2Pin)5046-03A
1 2 3
IC17 BA00ASFP
2 1
4 5
63
R99 12K
D21
1SS355
AK
Q2 2SD2212
B
EC
C82
0.1uF
R96 5.6K
R100 10K
IC21
74HC245
1 2 3 4 5 6 7 9
10
8
20 19 18 17 15 16 14 13 12 11
DIR A1 A2 A3 A4 A5 A6 A8 GND A7
VCC
1G
B1 B2 B4 B3 B5 B6 B7 B8
CN5
DR CN(2Pin)5045-03A
1 2 3
IC16
74HC138
1 2 3 4 5 6 7 8
16 9 10 11 12 13 14 15
A B C G2A G2B G1 Y7 GND
VCC
Y6 Y5 Y4 Y3 Y2 Y1 Y0
CN2
KEY I/F RELAY CN
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
IC19 74HC244
2 4 6 8
11 13 15 17
1
19
18 16 14 12 9 7 5 3
1A1 1A2 1A3 1A4 2A1 2A2 2A3 2A4 1G 2G
1Y1 1Y2 1Y3 1Y4 2Y1 2Y2 2Y3 2Y4
FB2
(JUMPER)
F1
T400mA/250V
+C78
10uF/50V
C79
0.1uF
D2
1SS355
AK
D3
1SS355
AK
R93
10K
R98
2.4KF
FB1
(JUMPER)
CN3
F-LCD CN
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
R104 10K
+C74
10uF/50V
C84
100pF
C75
0.1uF
IC4D 74LV00A
12 13 11
+
C77
22uF/16V
R101
1.8K
C73
100pF
D4
1SS355
AK
+C70
10uF/50V
D22
1SR154-400
C71
0.1uF
R95
10K
C80
100pF
IC18
74HC245
1 2 3 4 5 6 7 9
10
8
20 19 18 17 15 16 14 13 12 11
DIR A1 A2 A3 A4 A5 A6 A8 GND A7
VCC
1G
B1 B2 B4 B3 B5 B6 B7 B8
R97 10K
A B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A A
B
C D
87654321
12345678
D C
B A
3/7I/O I/F CIRCUIT