Sharp UP-3300 (serv.man14) Service Manual ▷ View online
Pin
No.
SYMBOL
SIGNAL
NAME
Default
value
immediately
after reset
IN/OUT
after
initializing
FUNCTION
79
/HWR
/HWR
OUT
OUT
Upper write
signal
signal
80
/LWR
/LWR
OUT
OUT
Lower write
signal
signal
81
MD0
MD0
IN
IN
+5V: mode3
82
MD1
MD1
IN
IN
+5V: mode3
83
MD2
MD2
IN
IN
GND: mode3
84
AVCC
+5V
85
Vref
+5V
86
P70/AN0
TM1
IN
IN
Thermal head
thermistor sense
thermistor sense
87
P71/AN1
VPTST
IN
IN
+24V test
88
P72/AN2
/PES
IN
IN
Paper end sense
89
P73
NES
IN
IN
Near end sense
90
P74/AN4
VPREF
IN
IN
Standard
voltage sense
voltage sense
91
P75/AN5
SHUR
IN
IN
Thermal head
resistance
detection
resistance
detection
92
P76/AN6
SHR
IN
IN
Thermal head
resistance
detection
resistance
detection
93
P77/AN7
PFA
IN
IN
Step motor
disconnect
sense
disconnect
sense
94
AVSS
GND
GND
95
A20
A20
OUT
OUT
ADDRESS BUS
20
20
96
A21
A21
OUT
OUT
ADDRESS BUS
21(NU)
21(NU)
97
A22
A22
OUT
OUT
ADDRESS BUS
22(NU)
22(NU)
98
A23
A23
OUT
OUT
ADDRESS BUS
23(NU)
23(NU)
99
VSS
GND
GND
100
P80/IRQ0_
/POFF
IN
IN
IRQ0 POWER
OFF SIGNAL
OFF SIGNAL
101
P81/CS3_
/EXS
IN
OUT
IRQ1 INPUT
BUFFER FULL
SIGNAL
BUFFER FULL
SIGNAL
102
P82/CS2_
/RAS
IN
OUT
RAM CHIP
SELECT
SELECT
103
P83/CS1_
/CGS
IN
OUT
CG ROM chip
select(NU)
select(NU)
104
P84/CS0_
/ROS
IN
OUT
ROM CHIP
SELECT
SELECT
105
PA0/TP0
/ATRB1
IN
OUT
Thermal head
strobe signal
strobe signal
106
PA1/TP1
/STRB2
IN
OUT
Thermal head
strobe signal
strobe signal
107
PA2
/PFSW
IN
IN
Paper feed
switch sense
switch sense
108
PA3
/ONLSW
IN
IN
On-line switch
sense
sense
109
PA4
/LP
IN
OUT
Thermal head
latch signal
latch signal
110
PA5
HVCCSW
IN
OUT
Thermal head
power control
power control
111
PA6
DONLN
IN
OUT
On-line lamp
signal
signal
112
PA7
DERR
IN
OUT
Data error lamp
signal
signal
3. Memory map
4. Printer contorol
1) Paper feed control
The paper feed motor is a stepping motor with 4-phase driving coils.
The motor is driven by switching over the driving coils.
<MOTOR DRIVE SEQUENCE>
CPU OUTPUT
M54646AP OUTPUT
STEP
No.
JAS
JBS
B
A
/B
/A
1
L
H
L
H
H
L
2
H
H
H
H
L
L
3
H
L
H
L
L
H
4
L
L
L
L
H
H
000000H
007FFFH
200000H
400000H
600000H
800000H
A00000H
C00000H
E00000H
FF8000H
FFFD10H
FFFF00H
FFFF10H
FFFF10H
FFFF1CH
FFFFFFH
Bector
External address
area
area
Icternal RAM area
External address
area
area
Internal I/O registor
area
area
Area 6
Area 7
Area 5
Area 4
Area 3
Area 2
Area 1
Area 0
FLASH ROM
(CG ROM)
RAM
DIP SWITCH
I/O SELECT
I/O SELECT
(FISCAL MEMORY)
(FLASH ROM
BOOT BLOCK
WRITE)
BOOT BLOCK
WRITE)
NOT USED
IC14
CPU
CPU
/MON
Q1
2SK1B26
IC33A
PC35B02
+24V
JAS
JBS
IC32
M54646AP
B
A
/B
/A
11 – 5
2) Auto cutter control
To drive the auto cutter, a DC24V motor is used.
<MOTOR DRIVE SEQUENCE>
MOTOR +/– PIN CONTROL
MOTOR
ROATING
DIRECTION
CUT METHOD
CUTM+ (A)
CUTM– (B)
L
H
CCW
FULL CUT
H: Connected to DC24V.I
CCW: Counter clock wise
L: Connected to GND.
To detect the auto cutter home position, a microswitch is used.
3) Paper end sensor circuit
The reflex photo sensor on the printer PWB detects the presence/ab-
sence of the paper passing under the platens.
sence of the paper passing under the platens.
4) Thermal head control
The LTP2342 thermal head block diagram is shown below.
Thermal head block diagram (LTP2342)
1
Thermal head drive circuit
Print data which has been entered through DAT in synchroniza-
tion with the CLK signal is stored in LATCH according to the
timing (576 dots) of the LATCH signal. Stored print data is output
by the DST1, and DST2 signals to energize the heating element,
thus performing printing. Print data (576 dots) is divided by four
STROBE signals into the following four parts before being output.
tion with the CLK signal is stored in LATCH according to the
timing (576 dots) of the LATCH signal. Stored print data is output
by the DST1, and DST2 signals to energize the heating element,
thus performing printing. Print data (576 dots) is divided by four
STROBE signals into the following four parts before being output.
DST pin and conductive heating element (LTP2342)
STROBE No.
Heating element No.
Dot number/DST
DST1
1 ~ 288
288
DST2
289 ~ 576
288
Relationship between transferred data and print position
(LTP2342)
(LTP2342)
576 bit data transferred from DAT pin No. 1 ~ No. 576 are printed
at the position shown in the figure.
at the position shown in the figure.
2
Thermalhead temperature detecting circuit
By detecting the resistance of the thermalhead thermistor, the
head temperature is calculated to control the conduction pulse
width of the head.
head temperature is calculated to control the conduction pulse
width of the head.
3
Head rank setting
Since the thermalhead resistance fluctuates, they are classified
into the following four ranks.
into the following four ranks.
The head resistance is classified into the following four ranks.
Head resistance rank
Rank
Head resistance
1
1800 ~ 1900
Ω
2
1901 ~ 2000
Ω
3
2001 ~ 2100
Ω
4
2101 ~ 2200
Ω
*
The rank code is indicated on the label attached to the back of
the machine.
the machine.
[Example of head resistance rank]
The example shows Rank 2 of head resistance.
CTA
CTB
M
CUTM-(B)
CUTM+(A)
Cutter home
position switch
/CUTHP
CUTS
Cutter motor
IC14
CPU
CPU
IC34
TA8248K
+5V
/DES
Paper end sensor
Reflex photo sensor
1
2
4
3
IC14
CPU
CPU
DAT
CLK
LATCH
DST2
DST1
TH
TH
Vdd
Vdd
Vp
DOT576
DOT433
DOT432
DOT289
DOT288
DOT145
DOT144
DOT1
Block4
Block3
Block2
Block1
Heating element
Output driver
Latch register
Shift register
Thermister
Recording
paper
paper
Print surface
Paper feed direction
Data
Print data input
Printer mechanism
Data input sequence
1 2 3 4 5 6 ............... 574 575 576
1 2 3 4 5 6 ............... 574 575 576
Transfer data and print position (LTP2342)
1
2
3
4
5
6
7
8
9
10 11 12
1 2 3 4 5 6 7 8 9 0
LTP2242C-S432
11 – 6
5. Switches and LED lamp control
There are following two kinds of LED’s. The states are shown in the
table.
table.
LED No.
NAME
FUNCTION
LED3
ONLINE
Light up when in ON-LINE.
Goes off when in OFF-LINE.
Goes off when in OFF-LINE.
LED2
ERR
Lights up when an error occurs.
Goes off when an error is canceled.
Goes off when an error is canceled.
There are the following two kinds of switches. The states are shown
in the table.
in the table.
SWITCH No.
NAME
FUNCTION
SW3
ONLINE
Switches between ON-LINE and
OFF-LINE.
OFF-LINE.
SW4
PF
Feeds the receipt paper. Effective in
OFF-LINE.
OFF-LINE.
6. RS-232 control
Communication with HOST is made in RS232 communication in TTL
level.
level.
7. Selector circuit
The DIP switches are provided for switching various functions and the
selector IC (HC244) are provided for detecting various hardware
states.
selector IC (HC244) are provided for detecting various hardware
states.
8. Power supply circuit
/DERR
/DONLN
/ONLSW
/PFSW1
VRES
SW3
SW4
LED3
POWER
LED2
ERR
ONLINE
ONLINE
PF
IC7 DTC143EK
IC7 DTC143EK
LCDCN
IC14
CPU
IC14
CPU
CPU
IC23A
74HC32
IC23B
74HC32
/EXS
/RD
A1
IC24A
74F02
74F02
1 : /EXS0
2 : /EX1
IC14
CPU
CPU
A0~A18
IC19
27C040
D0~D15
D0~D7
IC20
HC244
S1
SW DIP-8
S2
SW DIP-8
D8~D15
IC21
HC244
/EXS
/EXS
HOST
POWER
TRANS
FORMER
Power supply PWB
UP-T80BP
MAIN (PRINTER CONTROL) PWB
+24V
+5V
SEITCHING
REGURATOR
KA34063A
11 – 7
12 – 1
12 – 2
1
2
3
4
5
6
7
8
D
C
B
A
D
C
B
A
1
2
3
4
5
6
7
8
C18
1000P
1000P
R67
1K
R68
1K
1K
CUTS
-RES0
CUTS
-RES0
+5V
C31
0.1uF
0.1uF
R25
R26
R27
R28
R29
R30
R31
R32
R26
R27
R28
R29
R30
R31
R32
10K X 8
R1
R2
R3
R4
R5
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R7
R8
R9
R10
R11
R12
R13
R16
100 X 8
100 X 6
100 X 2
R59
R60
R60
10K X 5
R14
5
6
4
IC26B
74HC02
+5V
+5V
+5V
+5V
R230
10K
R304
47K
R131
10K
C153
0.1uF
0.1uF
R17
R18
R19
R20
R21
R22
R23
R24
R18
R19
R20
R21
R22
R23
R24
10K X 8
A11
57
A12
58
A13
59
A14
60
A15
61
A16
62
A17
63
A18
64
A19
65
-WAIT
66
P61
67
P62
68
CLK
69
STBY
70
-RES
71
NMI
72
VSS
73
EXTAL
74
XTAL
75
VCC
76
-AS
77
-RD
78
-HWR
79
-LWR
80
MD0
81
MD1
82
MD2
83
AVCC
84
V
R
E
F
8
5
A
1
0
5
6
A
N
0
8
6
A
N
1
8
7
A
N
2
8
8
A
N
3
8
9
A
N
4
9
0
P
7
5
9
1
P
7
6
9
2
P
7
7
9
3
A
V
S
S
9
4
A
2
0
9
5
A
2
1
9
6
A
2
2
9
7
A
2
3
9
8
V
S
S
9
9
-
I
R
Q
0
1
0
0
C
S
3
1
0
1
C
S
2
1
0
2
C
S
1
1
0
3
C
S
0
1
0
4
T
P
0
1
0
5
T
P
1
1
0
6
T
P
2
1
0
7
T
P
3
1
0
8
P
A
4
1
0
9
P
A
5
1
1
0
P
A
6
1
1
1
P
A
7
1
1
2
VCC
1
TP8
2
TP9
3
TP10
4
TP11
5
TP12
6
TP13
7
TP14
8
TP15
9
VSS
10
PC0
11
PC1
12
-CS4
13
-CS5
14
PC4
15
PC5
16
PC6
17
PC7
18
-RES0
19
TXD0
20
TXD1
21
RXD0
22
RXD1
23
SCK0
24
-IRQ5
25
VSS
26
D0
27
D1
28
A
9
5
5
A
8
5
4
V
S
S
5
3
A
7
5
2
A
6
5
1
A
5
5
0
A
4
4
9
A
3
4
8
A
2
4
7
A
1
4
6
A
0
4
5
V
C
C
4
4
D
1
5
4
3
D
1
4
4
2
D
1
3
4
1
D
1
2
4
0
D
1
1
3
9
D
1
0
3
8
D
9
3
7
D
8
3
6
V
S
S
3
5
D
7
3
4
D
6
3
3
D
5
3
2
D
4
3
1
D
3
3
0
D
2
2
9
IC14
HD6413003
D[0..15]
A[0..19]
+5V
+5V
+5V
A[0..19]
D[0..15]
R38
10K
10K
R39
10K
10K
TP1
R37
1K
X1
X-TAL
16MHz
C1
15P
C2
15P
R36
R35
R34
1
2
3
SW1
JP3P
-RD
-HWR
-LWR
M1
-HWR
-LWR
M1
CTA
CTB
CTB
-RESET
-RESET
M1
-RD
-HWR
-LWR
-HWR
-LWR
+5V
C154
100P
100 X 3
1
2
3
IC11
DTC143EK
A11
A12
A13
A14
A15
A16
A17
A18
A19
A12
A13
A14
A15
A16
A17
A18
A19
CTA
CTB
CTB
+5V
+5V
R61
R62
R63
R62
R63
BLM21 X 3
R15
BD14
BD15
BD13
C14
10uF/16V
C17
47P
47P
C70
330P
C15
0.1U
0.1U
R41
1K
VREF1
VREF0
VREF0
-MON
JBS
JAS
JBS
JAS
-CUTHP
D1
D0
D0
RXD1
MRS
TXD1
SHEAD
-RES0
VHCON
-DTR
-CTS
-DSR
-FRWS
MRS
TXD1
SHEAD
-RES0
VHCON
-DTR
-CTS
-DSR
-FRWS
HUD
-FLBU
-FLBU
JBS
JAS
JAS
+5V
C16
0.1U
RXD1
TXD1
SO
-DTR
-CTS
-DSR
-FRWS
-CTS
-DSR
-FRWS
HS
-FLBU
-FLBU
VHCON
CLOCK
SW2
SW-SPDT
1
2
3
IC38
DTC143EK
R132 10K
R133 10K
R134 10K
R42
1K
1K
R43
1K
1K
-ROS
-RAS
-EXS
-EXS
-CGS
+5V
+5V
+5V
HVCCSW
47P X 4
C4
C7
C5
C6
R40
18KG
C3
10uF/16V
10uF/16V
1
2
3
IC12
DTC143EK
1
2
3
IC7
DTC143EK
+5V
R125
1K
1K
C97
0.1U
C98
1000P
BD23
BLM21
R46
100K
100K
R50
0
R51
10K
10K
R52
0
R53
10K
10K
R54
10K
1
2
2
CN1
5267-02A
SHUR
SHR
PFA
PFA
-PES
M2
A20
A20
-DONLN
M2
A20
A20
CN1-1
CN1-2
CN1-2
+5V
+5V
+5V
+5V
C11
0.1U
D1
1SS353
-DERR
TM1
TM2
+5V
330P X 5
R47
3.6KF
R48
16KF
BD21
BLM21
BD22
BLM21
R49
240
C12
1000P
1000P
-HEADTM
+5V
+24V
C35
0.1uF
0.1uF
BLM21 X 3
REF
1
K
3
A
2
IC6
KIA431F
C71
C72
C73
C74
C73
C74
C75
BD16
BD17
BD18
BD18
R44
1K
R45
1K
-POFF
VPREF
-ONLSW1
-PFSW1
-PFSW1
-LP
-STRB2
-STRB1
-STRB1
1. CONTROL PWB
1/6
CHAPTER 12. CIRCUIT DIAGRAM & PWB LAYOUT
1 CPU
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