Sharp XE-A301 Service Manual page 7
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Also See for XE-A301:
- Instruction manual (384 pages) ,
- Bedienungsanleitung (80 pages) ,
- Quick start manual (6 pages)
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3. PRINTER CONTROL
3-1. STEPPING MOTOR CONTROL
The stepping motor is driven at a constant voltage by Sanken
STA471A.
1step: 0.125mm, 1dot: 1step
Printing speed 50mm/s
< CPU's PORT >
No.
CPU PORT
80
P10
79
P11
78
P12
77
P13
76
P14
75
P15
74
P16
73
P17
< Driving steps >
RECEIPT MOTOR
Driver IC input (CPU output)
STEP
RAS
RBS
RCS
1
H
L
L
2
L
H
L
3
L
H
H
4
H
L
H
Driver IC input (CPU output)
STEP
JAS
JBS
JCS
1
L
H
H
2
L
H
L
3
H
L
L
4
H
L
H
* When the motor is at rest, the same phase as the final excitation
phase is RUSH energize for 10 ms to turn off all phases. 3 Turn all
RAS ~ RDS and JAS ~ JDS into L.
No energizing should be allowed at lease 30 ms after stopping the
motor before restarting.
When starting the motor, the first excitation phase is RUSH ener-
gized for 10 ms to start the motor.
Signal to be used
RAS
RBS
RCS
RDS
JAS
JBS
JCS
JDS
Motor driving signal
RDS
/RPFA
/RPFB
/RPFC
H
L
H
H
H
L
L
H
L
L
L
H
Motor driving signal
JDS
/JPFA
/JPFB
/JPFC
L
H
L
H
H
L
H
L
H
L
L
H
3-2. HEAD CONTROL
HEAD:832 dots in all. Printable range: 384 dots at receipt side; 384 dots
at journal side
Related PORT
No.
CPU PORT
30
29
28
93
92
91
90
89
21
/STB1: 641 ~ 832dot: 192 dots in all
/STB2: 449 ~ 640dot: 192 dots in all
/STB3: 193 ~ 448dot: 256 dots in all
/STB4:
* When turning on or off the printer power supply, make sure to turn /
/RPFD
STB1, 2, 3, 4 to "H".
H
L
* Do not turn on without paper.
H
L
* THERMAL HEAD power supply control : Turns ON when P81= "H";
L
H
turns OFF when "L". (The power supply for HEAD and STEPPING
L
H
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 ** ms
/JPFD
after the printer head is turned ON and make sure the voltage is sta-
L
H
ble.
H
L
(The power supply of the printer head should be turned ON and OFF
by using the regulator IC.)
H
L
L
H
XE-A301V HARDWARE DESCRIPTION
– 6 –
Signal to be used
TXD2
SO
RXD2
SI
CLK2
PCLK
P103
/STRB1
P104
/STRB2
P105
/STRB3
P106
/STRB4
P107
LATCH
P81
VHCOM
1 ~ 192dot: 192 dots in all
Total 832 dots
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