Read Sharp XE-A301 (serv.man3) Service Manual online
XE-A301V
HARDWARE DESCRIPTION
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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
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