AL-2020/2035/2040/2050/2060 CIRCUIT DIAGRAM 14 - 31
5V
5V
5V
EN
5V
KEYSC1
KEYSC2
KEYSC3
KEYI
N
SELI
N
3
SELI
N
2
SELI
N
1
PSW
F-KEYSC
2
F-KEYSC
3
F-KEYSC
1
F-KEYI
N1
F-KEYI
N2
F-KEYI
N3
F-KEYI
N4
F-KEYI
N5
F-KEYI
N6
F-KEYI
N7
BZR
CAK
NM6K
NM1K
NM8K
RAT
ENT
LK
MODK
BPK
MENU
RK
NM7K
SHPK
NM4K
NM2K
CLK
NM3K
NM5K
NM9K
NM0K
ASTK
EXP
ESRT
2SIDE
PSW
R312
100J
R312
100J
R343
2kJ
R343
2kJ
KEY315
SKQNA
B
D010
KEY315
SKQNA
B
D010
TP
2
6
TP
2
6
R317
1kJ
KEY306
SKQNA
B
D010
KEY306
SKQNA
B
D010
R33
9
10kJ
R33
9
10kJ
KEY321
SKQNA
BD010
KEY321
SKQNA
BD010
C317
Open
C317
Open
R307
100J
R307
100J
C30
9
Open
TP
3
6
TP
3
6
C31
9
Open
TP
2
9
TP
2
9
R313
100J
R313
100J
TP
2
4
TP
2
4
TP
1
7
TP
1
7
BZ301
PS1720P02
BZ301
PS1720P02
1
2
C334
Open
C334
Open
KEY325
SKQNA
BD010
KEY325
SKQNA
BD010
R30
9
100J
R30
9
100J
KEY307
SKQNA
B
D010
KEY307
SKQNA
B
D010
C310
Open
C318
Open
TP
2
5
TP
2
5
TP
3
3
TP
3
3
KEY322
SKQNA
B
D010
KEY322
SKQNA
B
D010
KEY313
SKQNA
BD010
KEY313
SKQNA
BD010
TP
1
9
TP
1
9
KEY302
SKQNA
BD010
KEY302
SKQNA
BD010
D302
1SS133
D302
1SS133
R318
33J
R318
33J
R338
1kJ
C311
Open
KEY324
SKQNA
BD010
KEY324
SKQNA
BD010
C316
Open
C316
Open
TP
2
1
TP
2
1
R321
2kJ
R321
2kJ
KEY31
9
SKQNA
B
D010
KEY31
9
SKQNA
B
D010
TP
3
5
TP
3
5
TP
2
8
TP
2
8
R336
1kJ
R340
2kJ
R340
2kJ
KEY320
SKQNA
B
D010
KEY320
SKQNA
B
D010
KEY323
SKQNA
B
D010
KEY323
SKQNA
B
D010
D303
1SS133
D303
1SS133
R315
1kJ
R308
100J
R308
100J
KEY308
SKQNA
BD010
KEY308
SKQNA
BD010
R311
100J
R311
100J
C320
Open
KEY318
SKQNA
B
D010
KEY318
SKQNA
B
D010
KEY312
SKQNA
BD010
KEY312
SKQNA
BD010
KEY301
SKQNA
BD010
KEY301
SKQNA
BD010
TP
3
1
TP
3
1
TP
3
2
TP
3
2
KEY310
SKQNA
B
D010
KEY310
SKQNA
B
D010
D301
1SS133
D301
1SS133
TP
2
3
TP
2
3
R342
2kJ
R342
2kJ
KEY303
SKQNA
BD010
KEY303
SKQNA
BD010
C335
Open
C335
Open
R320
2kJ
R320
2kJ
R322
2kJ
R322
2kJ
KEY314
SKQNA
BD010
KEY314
SKQNA
BD010
IC
3
0
2
74HC151
IC
3
0
2
74HC151
D0
4
D1
3
D2
2
D3
1
D4
15
D5
14
D6
13
D7
12
A
11
B
10
C
9
G
7
W
6
Y
5
VCC
16
GN
D
8
KEY317
SKQNA
B
D010
KEY317
SKQNA
B
D010
R31
9
2kJ
R31
9
2kJ
C336
Open
C336
Open
TP
1
6
TP
1
6
TP
3
4
TP
3
4
C321
0.1u
TP
2
7
TP
2
7
R348
2kJ
C304
Open
C304
Open
TP
1
8
TP
1
8
KEY311
SKQNA
BD010
KEY311
SKQNA
BD010
R316
1kJ
R337
1kJ
TP
2
0
TP
2
0
R314
100J
R314
100J
R347
2kJ
Q306
KRC106S
Q306
KRC106S
1
2
3
C313
Open
C313
Open
C315
47pF
TP
3
0
TP
3
0
R341
2kJ
R341
2kJ
KEY30
9
SKQNA
BD010
KEY30
9
SKQNA
BD010
R346
2kJ
KEY305
SKQNA
BD010
KEY305
SKQNA
BD010
C337
Open
C337
Open
KEY316
SKQNA
BD010
KEY316
SKQNA
BD010
R310
100J
R310
100J
IC
3
0
3
74HC238
IC
3
0
3
74HC238
GN
D
8
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
A
1
B
2
C
3
G2B
5
G2A
4
G1
6
VCC
16
TP
2
2
TP
2
2
C314
Open
C314
Open
KEY304
SKQNA
BD010
KEY304
SKQNA
BD010
C312
0.1u
C312
0.1u
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
OPERATION
PWB
(KEY
/
Buzzer
section)
(AL-2050/2060)
2/3
Summary of Contents for AL-2020
Page 217: ...Memo ...