Read Sharp XE-A212 Service Manual online
XE-A212V
HARDWARE DESCRIPTION
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5-3. KEYSCAN MATRIX
PENDING
Others
5-4. DISPLAY
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 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
3
a ~ g
D7
3
DP
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)
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)
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
DRAWER OPEN : 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.
+ 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
detection point
ON/OFF control (MODE SW)
ON/OFF control
Winding motor
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