Brother PT 1800 - P-Touch 1800 Thermal Transfer Printer, Service Manual

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Appendix A. Main PCB
NAME
CODE
MAIN PCB CIR 1800
LA0096001
A
B
1 2 3
C
D
1 2 3 5 6
A
B
C
D
6
4
4 5
R S I 1
V 2
S
E
G
5
1
P A 7
V C C
Q 2
R T 1 N 1 4 4 C
X I
Q 3
D T A 1 4 3 Z K
V 1
V C C
V 5
R 3
1 0 K 1 %
R 4
1 0 K 1 %
R 8
1 0 K
1 %
0 V
P 1 ( S E N S O R )
A B 0
A B 2
R 6
1 0 K 1 %
R 7
1 0 K 1 %
P A 0
A B 1
R 5
1 0 K 1 %
R 2
1 0 K 1 %
R 9
4 . 3 K
1 %
3
V C C
P
0
4
P
1
2
L
C
D
R
E
S
P
1
3
M M O D
4 7 K
1 0 K
P
2
3
V B T
L
C
D
E
P
3
0
N
P
1
1
Q 4
B 1 4 2 7
4 . 7 K
V B T
R 1 1
2 . 2 K
5
R S I 5
R S I 4
R S I 3
R S I 2
2
1
R 1 0
1 0 K
4 7 K
P A 1
P
2
4
A
B
1
5
M
O
T
_
O
N
P
1
4
M O T _ O N
P
1
0
1
4
3
1 0 0
( 6 . 3 V )
0 V
+ 5 B V
S - 8 1 3 5 0
Q 2
C 4
1
1 0 4
C 1 1
I N OU T
GN D
D 1
1 S S 3 5 5
2
P 3 ( M O T O R O N )
0 V
2
0 V
V 3
V 4
L C D R E S
L C D A 0
L C D R W
T H 1
5 0 K
R 1 3
4 7 K 1 %
0 V
N
0 V
0 V
V S S
X O
0 V
V B T
P 0 0
P
0
3
P
0
5
P
0
6
P
2
1
4
7
6
5
3
8
9
2
1
H _ C L K
C O M
D A T A
C L O C K
C O M
L A T C H
G N D
G N D
G N D
S T R O B E
V D D
V D D
P 2 ( H E A D )
C 5
1 0 4
R 2 4 1 M
R 2 5
4 7 0
N
C 3
1 0 4
0 V
H _ L A T
H _ L A T
1
8 0
O S C 2
O S C 1
P 0 2
R E T
V C C
D A T A
X T 1 2 0 M H z
I
R
Q
0
+ 5 B V V D D
V R E F +
V R E F -
P 0 1
R
S
T
1 0
+ 5 B V
1
3
2
0 V
R 2 0
1 0 K
C 8
1 0 2
C 7
1 0 4
Q 6
S 8 0 8 4 2
A N U
I N OU T
GN D
K I 7
K I 6
K I 5
K I 4
K I 3
K I 2
K I 1
K I 0
S I _ 0
S I _ 1
A
B
1
3
A
B
1
4
P 3 5
P
8
0
P 4 1
P 4 2
P
6
4
P
6
5
P
6
6
A B 3
P 5 1
O N / O F F
P
2
2
A B 1 9
0 V
P 4 7
P 5 0
P 5 2
C 1 0
1 0 4
S
E
G
5
V 1
S
E
G
4
S
E
G
2
S
E
G
3
S
E
G
1
S
E
G
0
C
O
M
1
5
L C D E
C
O
M
5
R E S
P 5 4
A B 1 8
P 5 3
K O 5
K I 1
K I 2
K I 3
K I 4
K I 5
K I 6
P 6 0
P 6 1
P 6 2
P 6 3
P 4 3
P 4 4
P 4 5
P 4 6
V 2
V 3
V 4
V 5
D B 7
V 1
V 2
V 3
V 4
V 5
A 0
R / W
E
N J U 6 4 5 0
8 8
9 5
9 2
9 1
9 4
9 0
8 6
8 7
7 3
7 7
7 6
1 1
1
7
2
7
1
7
0
6
9
6
8
6
7
# 3
D B 6
8 5
D B 5
8 4
2
1
9
6
C
O
M
0
1
0
0
C
O
M
4
M / S
V S S
0 V
O
S
C
2
F
R
O
S
C
1
9 3
7 8
8
9
7
4
7
5
C 2
1 0 4
D B 4
8 3
D B 3
8 2
D B 2
8 1
D B 1
8 0
D B 0
7 9
N
C
R 1 2 1 M
P A 2
P A 3
D
B
7
P
7
1
P
7
0
P
6
7
P
7
2
P
7
3
P
7
4
P
7
5
P
7
6
P
3
4
R S I 5
P
3
3
R S I 4
P
3
2
R S I 3
P
3
1
R S I 2
P 4 0 K I 0
P 3 7
S
I
_
0
P 3 6
P
7
7
P
8
7
A
B
4
D
B
1
P
8
1
D
B
0
D
B
2
P
8
2
D
B
3
P
8
3
D
B
4
P
8
4
D
B
5
P
8
5
D
B
6
P
8
6
+ 5 B V
R 2 2
1 0 K
A
B
1
2
A
B
1
1
A
B
1
0
A
B
9
A
B
8
A
B
7
A
B
6
A
B
5
P A 5
P A 4
P A 6
V C C
K
O
2
K
O
1
K
O
4
K
O
3
K
O
2
K
O
1
K
O
6
R S I 1
K O 6
V C C
K
O
0
K
O
0
K
O
3
K
O
4
K
O
5
H _ C L K
N
L
C
D
A
0
L
C
D
R
W
S
I
_
1 N
6
V B T
4
K I 7
D B 7
D B 0
D B 1
D B 2
D B 3
D B 4
D B 5
D B 6
C 1 2
1 0 5
S
2
5
G
S
4
0
G
S
0
S
6
0
C 0
C 4
C 5
C 1 5
R 1 9
R 1 7
S
E
G
2
5
C
O
M
1
5
S
E
G
4
0
C
O
M
1
5
R 2 3
R 2 1
C 9
1 0 5
3
0 V
2
1
PRNT
Q
W
AL T
A
SPC Z
3
4
E
R
S
D
X
C
5
6
T
Y
F
G
V
B
7
8
U
I
H
J
N
M
9
0
O
P
K
L
/
?
DEL
SET
2
A B C
1 2 3 4 5
CODE SFT
R E T
1
V B T
R E T
P 4 ( P O W E R )
Q 1
R T 1 N 1 4 4 C
4 7 K
1 0 K
Q 7
D T A 1 4 3 Z K
V C C
4 . 7 K
+ 5 B V
4 7 K
0 V
:
3 7 A B 1 4
A 1 4
3 8 A B 1 3
A 1 3
3 9 A B 1 2
A 1 2
4 0 A B 1 1
A 1 1
4 1
A B 1 0
A 1 0
4 2 A B 9
A 9
4 A B 8
A 8
5 A B 7
A 7
6 A B 6
A 6
7 A B 5
A 5
8 A B 4
A 4
9 A B 3
A 3
1 0
A B 2
A 2
1 1 A B 1
A 1
3 1 A B 0
A 0
1 5 D B 0
1 7 D B 1
1 9 D B 2
2 1 D B 3
2 4 D B 4
2 6 D B 5
2 8 D B 6
3 0 D B 7
D 4
1 3
2 3
V D D
OE C E
GN D
D 0
D 1
D 2
D 3
D 5
D 6
D 7
#
2
2
3
C
4
1
0
0
(
4
/
8
M
Masked ROM)
0 V
3 6 A B 1 5
A 1 5
3 5 A B 1 6
A 1 6
3 4 A B 1 7
A 1 7
3
A B 1 8
A 1 8
V C C
4 3
2 A B 1 9
A 1 9
A - 1
3 2
GN D
3 3
B Y T E
1
N C N
4 4
A 2 0
R 1
1 0 K
V C C
C 1
1 0 4
A B 1 7
A B 1 6
1 4
1 2
S W 1
R 1 8
1 0 0 K
V C C
N C
D A T A
0 V
2 0
2 1
4 0
4 1
6 0
6 1
6
C 6
1 0 4
C 1 3
1 0 2
C 1 4
1 0 2
T
No connection on pins
not shown here