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RB2
C83
C85
10pF
10pF
C84
10pF
10pF
C103
10pF
10pF
C102
C104
N-550B
RG0
R18
C30
D5
10K
0.1uF
B140
1
2
C29
R19
C31
R25
820pF
100K_F
22nF
5K_POT
SEG a
SEG c
SEG e
SEG g
C87
C89
C91
DIGIT 1
10pF
10pF
10pF
DIGIT 3
C86
C88
C90
DIGIT 5
10pF
10pF
10pF
DIGIT 7
RF0
RF2
10pF
10pF
10pF
RE0
C105
C107
C109
RE2
10pF
10pF
10pF
RC4
C106
C108
C110
RC6
RB0
RB4
RB3
RC2
Power OUT
TP17
+5V
C32
T POINT M5
0.47uF
47uF_16VEL
C33
R20
5.1K
+5V
47uF_16VEL
U16
1
VCC
R21
3
2
U17A
1K
+
VI2
1
4
2
VI4
-
LM324/SO
7
TP16
NC
T POINT M5
TDA7052A
Alarm Sound Module
Connector
J3
1
2
A1
B1
3
4
5
A2
B2
6
A3
B3
7
8
9
A4
B4
10
A5
B5
11
12
A6
B6
13
14
15
A7
B7
16
A8
B8
17
18
19
A9
B9
20
A10
B10
21
22
23
A11
B11
24
A12
B12
25
26
27
A13
B13
28
A14
B14
29
30
A15
B15
31
32
33
A16
B16
34
A17
B17
35
36
37
A18
B18
38
A19
B19
39
40
41
A20
B20
42
RE3
A21
B21
43
44
A22
B22
DIN 44_AB-H
C117
C28
10pF
47uF_35VEL
Alarm SW
+5VB
Power IN
VIN
Front BD Connection
47uF_16VEL
C34
C35
C36
C37
0.1uF
47uF_16VEL
TP18
6
GND1
T POINT M5
5
S1
VO1
8
VO2
S2
3
TP19
GND2
T POINT M5
SEG b
SEG d
SEG f
DP
DIGIT 2
C92
C93
C94
C95
C96
DIGIT 4
10pF
10pF
10pF
10pF
10pF
DIGIT 6
DIGIT 8
RF1
RF3
RE1
RC3
10pF
10pF
10pF
RC5
C111
C112
C113
RC7
RB1
RB5
anteld
J6
PHONEJACK STEREO SW
Foot SW/Antenna Phone Jack
Speaker Control Schematic Diagram
Technical Discussion
C82 120pF
J7
1
2
CON2
C97
C98
C99
C100
C101
10pF
10pF
10pF
10pF
10pF
10pF
10pF
10pF
C114
C115
C116
+5V
MR1
4.7K
Alarm SW
MC1
1uF
Figure 53: MainPCB Interface and
125
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