Sharp XE-A301 (serv.man3) Service Manual ▷ View online
XE-A301V
HARDWARE DESCRIPTION
– 8 –
Power supply/CONTROL pins
5. KEY-DISPLAY
5-1. LCD CONTROL
Basically the same as the 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 A401, the key and display scan signal is common.
KEY/display SCAN and key read should be performed at the following
timing.
1
KEY/display SCAN cycle: 10ms
2
Blanking time: 50us
3
KEY DATA READ timing: More than 10 ms from the fall of the SCAN
signal
Key / Display-related registers
< LED Segment Signal >
< LCD Control Signal / Key Strobe Signal >
Bit3 ~ 0 : KS3 ~ 0
Strobe signals for keys and POP UP Display are generated at KS3 - 0.
< Key Return Signal >
PORT
PIN
No.
I/O
Pin name
Function
PORT
PIN
No.
I/O
Pin name
Function
BYTE
8
I
BYTE
Connected to VCC
Vcc
62
Vcc
Connected to VCC
CNVss
9
I
CNVss
Connected to GND
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 VCC
Vss
14
Vss
Connected to GND
AVcc
99
AVcc
Connected to VCC
Xin
15
I
Xin
connected to Spectram diffusion IC
Vcc
16
Vcc
Connected to VCC
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
04003h
KR7
KR6
KR5
KR4
KR3
KR2
KR1
KR0
XE-A301V
HARDWARE DESCRIPTION
– 9 –
5-3. KEYSCAN MATRIX
5-4. DISPLAY
This machine has an LCD display, 5 x 7 dots, 2 lines, at the front side
and a 7-digit LED at the pop-up side.
• 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
3
A ~ g
D7
3
DP
6. POWER SUPPLY
7. REWRITING FLASH MEMORY
IPL from EP-ROM: After IPL SW is set to ONA the program is started
from EP-ROM by turning on the power.
The program on EP-ROM is transferred to flash
The program on EP-ROM is transferred to flash
ROM by switching the banks through S-RAM.
8. DRAWER
This machine has a 1 channel of drawer port. (+ 1 channel is reserved
for the CPU PORT) O R No open sensor is provided.
The driving time for the DRAWER solenoid are as follows: 50ms (max)
45ms (min)
45ms (min)
9. PRINT RATE
384 dots/1 line
10. A/D CONVERSION
The printer power supply voltage should be measured at more than 10
ms after the printer is turned ON.
11. BUZZER
PIEZO type BUZZER
The oscillating frequency is 4.0kHz
m
0.5kHz
12. RESET
The RESET signal is generated when:
1) The mode key switch is turned from SRV to a position other than
SRV’(excluding OFF).
2) The power is turned ON more than 10 seconds after the power is
turned OFF. (The reset signal may not be issued if the POWER-
OFF time is short.)
3) The mode key switch is turned from OFF to a position other than
OF (excluding the SRV position). (If the power-off time is less than 5
seconds, the reset signal may not be issued.)
seconds, the reset signal may not be issued.)
CPU
STO
ST1
ST2
ST3
ST4
ST5
ST6
ST7
ST8
ST9
MODE
P90
SRV
PGM
Time
REG
MGR
X1/Z1
X2/Z2
Others
P91
PF-R
PF-J
RPE
HEAD
UP
JPE
DRAWER
OPEN
MRS
RS/CI
FRONT:
POP UP:
VLED
VCC 5.0V
VDD 5.0
24V
BATTERY
/POFF detection
point
TRANS.
LM2574 +
power failure occurs..
PQ1CG2032
ON/OFF CONTROL
(MODE SW)
(MODE SW)
Measures should be taken to restore within 10 ms after a
XE-A301V
DIAGNOSTIC PROGRAM
– 10 –
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
1
Key operation
100
3
2
Test 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.
3
Check that:
A) Each position is correctly displayed.
B) The brightness of each number is uniform.
C) The buzzer sound is normal.
4
End of testing
You can exit the test mode by pressing any key. The following is
printed.
1 0 0
2) KEY CODE
1
Key operation
101
3
2
Test procedure
3
Check that:
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.
4
End 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:
1 0 1
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 + “PO” key
Key operation: Above code + “PO” key
RCPT/PO
D I S P
B U Z Z E R
P G M
0 1 2 3 4 5 6 7 8 9 A B C D E F
OP display
Rear display
4.5.6.7.8.9.0.
RCPT/PO
K E Y
C O D E
P G M
OP display
KEY CODE
XE-A301V
DIAGNOSTIC PROGRAM
– 11 –
3) PRINTER TEST
1
Key operation
102
3
2
Test procedure
At the receipt side, the logo is also printed and the receipt is issued.
3
Check that:
The print is free from contamination, blur, and uneven density.
4
End of testing
The test will end automatically.
4) KEYBOARD TEST
1
Key operation
_ _ _ _104
3
2
KEY check sum code
2
Test 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.
until the final key (CA/AT) is pressed.
Both data are the same, the test ends, printing the number given
below.
below.
If both data are different, the printer prints the error message.
3
Check:
A) The content of completion print
4
End 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.
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
a decimal number value, which will become the sum check data
that will be entered when DIAG is started.
5) MODE SWITCH TEST
1
Key operation
105
3
2
Test procedure
The above X must be read in the correct order. (If the contact is
open, 9 will be displayed.)
open, 9 will be displayed.)
3
Check:
The display during testing and the content of the completion print.
4
End of testing
6) PRINTER SENSOR TEST
1
Key operation
106
3
2
Test procedure
Check the status of the paper end sensor and head up sensor.
3
Check the following.
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
4
End of testing
You can exit the test mode by pressing any key and the printer prints
the following.
1 0 6
7) CLOCK TEST
1
Key operation
107
3
2
Test procedure
3
Check that:
“–“ blinks and the clock counts up.
When the test ends normally:
1 0 4
When an error occurs:
E – ~ –
1 0 4
RCPT/PO
R / J
P R I N T E R
P G M
OP display
5 lines of 24 digits are printed.
Enlargement
RCPT/PO
K E Y
B O A R D
P G M
OP display
KEY CODE
1 0 4
When the test ends normally
1 0 5
When an error occurs:
E – ~ –
1 0 5
RCPT/PO
M O D E
1 0 5
S W
X
P G M
OP display
MODE: PGM_VOID_OFF_OP X/Z_REG_MGR_X1/Z1_X2/Z2__PGM
X :
1
2
9
3
4
5
6
7
1
RCPT/PO
R / J
S E N S O R
P G M
X
Y
OP display
1 0 6
RCPT/PO
T I M
C H E C K
P G M
OP display
Hour
Blinks at an interval of 0.5 sec.
Min.
Sec.
1 0 4
E R
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