PT6800 Service Manual
31
Figure 7 PT6800 Key Board Schematic Circuit Diagram
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D
D
C
C
B
B
A
A
MI
C
1
MI
C
C20
10
5
R2
2
1.
8K
R2
0
470R
C16
4.
7u
F/1
0V
C2
2
10
2
L3
B
LM
11A
221S
C19
10
2
C1
8
10
2
C2
1
10
2
KE
Y
1
F1
KE
Y
2
F2
KE
Y
3
F3
KE
Y
4
F4
KE
Y
5
1
KE
Y
6
2
KE
Y
7
3
KE
Y
8
4
KE
Y
9
5
KE
Y
1
0
6
KE
Y
1
1
7
KE
Y
1
2
8
KE
Y
1
3
9
KE
Y
1
5
0
KE
Y
1
4
*
KE
Y
1
6
#
L4
B
L
M
11A
22
1S
Q1
FM
M
T
5
9
1
Q2
DT
C1
4
4
E
E
D1
*
C1
7
104
R1
9
1
00R
D4
YELLOW
D5
Y
E
LLO
W
D3
YELLOW
D7
YE
L
L
O
W
D2
YELLOW
D6
Y
E
LLO
W
R1
8
100R
R1
7
10
0R
R1
2
1K
R1
1
1K
R1
0
1K
R9
1K
R1
3
1
K
R1
4
1
K
R1
5
1
K
R1
6
1
K
1 2
3 4
5 6
7 8
9 10
CN2
CN1
0
1
2 3
4 5
6 7
8 9
10 11
12 13
14 15
16 17
18 19
20 21
22 23
24
39
25 26
27 28
29 30
31 32
33 34
35 36
37 38
CN3
CN3
8
C1
1
22
1
C7
22
1
C6
221
1
2 3
4 5
6 7
8 9
10 11
12 13
14
15
CN1
CN1
4
L
1
BLM
1
1
A2
2
1
S
C1
3
10
3
C1
2
102
R4
0
R
R8
*
R7
2
.7
K
R6
2
.7
K
R3
2
.7
K
R2
2
.7
K
R1
2
.7
K
L2
B
L
M
1
1
A
2
2
1
S
C1
5
10
3
C1
4
10
2
按
键
板电原理图
名称
文件
号
设计
批准
机型
版本
审核
第张
张
共
1
1
/
Q3
2
S
K
1
824
R2
3
*
R2
1
100
K
R5
2
.7
K
C1
221
C2
22
1
C2
3
22
1
C2
4
22
1
C2
5
221
C2
6
221
C2
7
22
1
C2
8
22
1
C8
221
C9
22
1
C1
0
*
C2
9
*
C3
0
*
C3
1
*
C3
2
*
C3
3
*
C3
4
*
C3
5
*
C3
6
22
1
C3
7
22
1
R2
4
0R
R2
7
*
C4
1
10
4
C4
2
10
4
L5
BLM
1
1
A
22
1S
C3
8
4
70P
C3
9
470P
C4
0
4.
7u
F
/10
V
R2
5
47
0R
R2
6
1.
8k
LC
D
CN
CS
S
RX
D
TX
D
GND
RX
D
TX
D
5V GND
CN PF
PT
T
ME
MI
C
M S
W
SP
-
SP
+
GND
5V
PF
PT
T
MI
C
SP
-
SP
+
SP
SW
R3
0
*
R2
8
0R
R2
9
NC
R3
1
36
K
Summary of Contents for PT6800
Page 28: ...PT6800 Service Manual 27 Figure 3 PT6800 Main Board Top Layer Position Mark Diagram ...
Page 29: ...PT6800 Service Manual 28 Figure 4 PT6800 Main Board Bottom Layer Position Mark Diagram ...
Page 30: ...PT6800 Service Manual 29 Figure 5 PT6800 Main Board Top Layer Position Value Diagram ...
Page 31: ...PT6800 Service Manual 30 Figure 6 PT6800 Main Board Bottom Layer Position Value Diagram ...
Page 33: ...PT6800 Service Manual 32 Figure 8 PT6800 Key Board Top Layer Position Mark Diagram ...
Page 34: ...PT6800 Service Manual 33 Figure 9 PT6800 Key Board Bottom Layer Position Mark Diagram ...
Page 35: ...PT6800 Service Manual 34 Figure 10 PT6800 Key Board Top Layer Position Value Diagram ...
Page 36: ...PT6800 Service Manual 35 Figure 11 PT6800 Key Board Bottom Layer Position Value Diagram ...
Page 40: ...PT6800 Service Manual 39 Figure 16 KBC 60Q Schematic Circuit Diagram ...
Page 41: ...PT6800 Service Manual 40 Figure 17 PCB Layout 1 ...
Page 42: ...PT6800 Service Manual 41 Figure 18 PCB Layout 2 ...
