Read Sharp XE-A202 Service Manual online
XE-A202V
HARDWARE DESCRIPTION
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Thermal head block daigram
Thermal head strobe terminals
8. PAPER TAKE UP MOTOR DRIVE CIRCUIT
When the MOTOR signal from the CPU is HIGH, Q1 is turned on to
operate the motor.
9. DRAWER DRIVE CIRCUIT
When the DR1 signal from the CPU is HIGH, Q9 is turned on to operate
the solenoid.
the solenoid.
10. BUZZER DRIVE CIRCUIT
When the pulse signal (about 4KHz) is generated from the CPU, the
buzzer sounds.
11. KEYBOARD CIRCUIT
Four P10-13 signals from the CPU are converted into 16 strobe signals by two 74HC138 for use in various functions.
STB No.
Dot No.
Number of dots
1
1 ~ 144
144
2
145 ~ 288
144
STB1
11
VP
GND
9,10,14,15
STB2
13
LAT
7
CLK
16
DAT
17
VCC
12
Latch register
Shift register
5,6,18,19
Dot #1
Dot #288
Connector
CPU
TA4IN/U
MOTOR
Q13
R101
CN5
MOTOR
VH
C79
(21pin)
25D2212
1K
N.U.
M
Q9
R102
C80
FB2
DR1
CPU
/RTS0
(38pin)
FB2, FB3: Jumper Wire
1K
DIA
IN4002
IN4002
CN6
FB3
0.1u
V0
F6
T400mA/250V
2SD2212
CPU
TA4OUT/U
22pin
470
R86
BZ
BZ
CPU
P10-13
P92-97
Key
Matrix
Head up
sensor
HC138
P10-13
P10-13
/S8-9
/S0-7
/S0-9
P92-97
Mode
Switch
/S0-7
/S0-9
P91
Paper
feed key
/S1
Paper end
sensor
/S3
/S4
RS232
/CI
signal
/S9
P91
Front
display
74HC374
a,b,c,d,e,f,g,dp
/CS3
Pop-up
display
display
G1',G2',
G3'G4',G5',
G6',G7
G3'G4',G5',
G6',G7
/S0 - 9
A',B',C',D',E',F',G',DP'
D0-7
D0-7
/CS3
P90
HC138
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