PT8000 Service Manual
28
Figure 5 PT8000 Keyboard 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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
35
25
26
27
28
29
30
31
32
33
34
CN2
CN34
GND
MD
HOOK
ME
MIC
ME
PTT
GND
B
B
BLC
GND
GND
GND
BUSY
PTT
TXD
RXD
VPP
RESET
VCC
AFIN
AFOUT
MD
1
HOOK
2
MI
C
3
ME
4
PTT
5
GND
6
B
7
BL
C
8
CN1
RJ
4
5
VR1
10K
R21
220R
R20
220R
R19
220R
R18
220R
R17
220R
R16
220R
R15
220R
R14
220R
a
7
b
6
c
4
d
2
e
1
f
9
g
10
dp
5
a
b
c
d
e
f
g
dp
CO
M
3
CO
M
8
IC
1
SE
G
-0
.5
R3
220R
K1
P1
K2
P2
K3
P3
K4
P4
K5
P5
K6
PO
W
E
R
D13
GREEN
D14
GREEN
R2
2
22
0
R
R2
3
220R
C3
4
10
1
C11
101
C13
101
C14
10
1
C15
101
C16
101
C1
7
10
1
C9
10
1
C8
101
C7
101
C6
10
1
C5
101
C4
101
C3
10
1
R4
0R
D3
GR
E
E
N
R1
330R
Q1
D
T
C
144E
E
D4
GR
EE
N
D6
GR
EE
N
C26
471
R1
1
22
0R
R1
2
22
0R
R1
3
22
0R
R2
6
22
0R
D1
GR
EEN
R2
330R
D2
GR
E
E
N
D5
GR
EEN
C21
101
C22
101
C23
101
C24
101
C25
101
C27
101
C28
101
A
1
B
2
Q0
3
Q1
4
Q2
5
Q3
6
GND
7
CP 8
MR 9
Q4
10
Q5 11
Q6 12
Q7 13
VCC 14
IC
2
74
L
S
1
6
4
LOWL
SCANL
GND
KEY1
KEY2
RXL
DATA
CLK
TXL
R1
0
10
R
C1
47
1
R30
220R
R31
220R
C2
*
C20
*
R2
7
10K
L1
BL
M11A
601S
R5
10K
R8
0R
R7
4.7K
R6
20K
R9
10K
R32
0R
R29
4.7K
R28
20K
C12
101
GND
MR
C31
101
C32
101
C33
101
C10
101
C29
101
C30
101
C35
101
R36
*
R2
4
22
0
R
R2
5
220R
D7
GREEN
D10
RED
Q2
*
C1
8
*
Q3
*
C19
*
R3
3
0R
R3
4
0R
D8
GREEN
D9
*
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
PT
8000
1
1
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Summary of Contents for PT8000
Page 1: ......
Page 28: ...PT8000 Service Manual 26 Figure 3 PT8000 Main Board Top Layer Position Mark Diagram ...
Page 29: ...PT8000 Service Manual 27 Figure 4 PT8000 Main Board Bottom Layer Position Mark Diagram ...
Page 31: ...PT8000 Service Manual 29 Figure 6 PT8000 Keyboard Top Layer Position Mark Diagram ...
Page 32: ...PT8000 Service Manual 30 Figure 7 PT8000 Keyboard Bottom Layer Position Mark Diagram ...