(h)
(i)
(j)
(29)
(30) (37)(38)
(39) (45)
(54)(55) (56)(57)(58)(59)(60)(61)(62)(32)(33) (34)(35)(31) (36)
4/4
KX-TA308 MAIN BOARD NO.3 (4/4)
(40)
(44)
(42)(41)
(46)(47)(48)(49)(50) (52)(51)
(53)
(43)
IC108
1D
3
2D
4
3D
7
4D
8
5D
13
6D
14
7D
17
8D
18
OE
1
8Q
19
7Q
16
6Q
15
5Q
12
4Q
9
3Q
6
2Q
5
1Q
2
E
11
VCC
20
GND
10
IC100
CPU(V55)
120
OPEN
119
DEX
118
RAS
117
IORD
116
IOWR
115
RD
114
WRL
113
WRH
112
ASTB
111
IC(L)
110
D8/D16
109
GND
108
VDD
107
A23
106
A22
105
A21
104
A20
103
A19
102
A18
101
A17
100
A16
99
A15
98
A14
97
A13
96
A12
85
AD1
84
AD0
83
IC(H)
82
GND
81
VDD
80
TCE1
79
TCE0
78
DMAAK1
77
DMAAK0
76
RS232CDSR
75
RS232CDTR
74
VDD
73
P77
72
P76
71
P75
70
P74
69
P73
68
P72
67
P71
66
P70
65
GND
64
AVDD
63
AVREF
62
CODE3
61
CODE2
55
RTCCLK
54
RTCCS
53
GND
52
DRLY2
51
DRLY1
50
BUSY2
49
BUSY1
48
DOPN4
47
DOPN3
46
DOPN2
45
DOPN1
44
VDD
43
P36
42
MODEMRXD
41
MODEMTXD
40
P33
39
P32
38
RS232CRXD
37
RS232CTXD
36
25Hz
35
440Hz
34
TEST
33
LEDSW
32
BGMSW
31
EXTPAG
30
INTP5
29
INTP4
28
ACDOWN
27
RTC
26
INTP1
25
DCPDWN
24
P10
23
GND
22
DCN4
21
DCN3
20
DCN2
19
DCN1
18
DHK4
17
DHK3
16
DHK2
15
DHK1
14
REFRQ
13
GND
12
X2
11
X1
10
VDD
9
WDTOUT
8
RESET
7
CLKOUT
6
POLL
95
A11
94
A10
93
A9
92
A8
91
AD7
60
CODE1
59
DEFAULT
58
AVSS
57
VDD
56
RTCDATA
90
AD6
89
AD5
88
AD4
87
AD3
86
AD2
5
READY
4
HLDRQ
3
HLDAK
2
BUSLOCK
1
VDD
R107 39
R122 39
C106
0.022
+5V
R130
10K
R131 10K
R132 10K
+5VS
+5VS
R104
10K
R106 10K
R105 10K
+5VS
+5V
C105
0.022
IC107
DECORDER
A
1
B
2
C
3
G1
6
VDD
16
G
8
G2A
4
G2B
5
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
+5VS
+5VS
+5VS
+5VS
L103
L101
L104
L102
4.7
C127
4.7
C126
4.7
µ
F
C124
4.7
µ
F
C123
+5V
R153
39
R154
39
R155
39
R156
39
R109 39
R111 39
R113 39
R114 39
R116 39
R117 39
R118 39
R119 39
R120 39
R121 39
R123 39
R124 39
R125 39
R126 39
R127 39
R128 39
R129 39
R136 10K
R13739
R138 10K
R163
47K
R164
10K
CN7
7 RST
6 DSR
4 DTR
2 RS232CRXD
3 RS232CTXD
5AG
8NC
1NC
9NC
IC123
5
3
+5VB
C117
0.022
IC112
8
4
C119
0.022
+24V
IC115
14
7
C140
0.022
+5V
IC114
14
7
C141
0.022
+12V
IC113
8
4
+12V
C143
0.022
+12V
IC900
8
4
C142
0.022
R170 39
R171 39
R172 39
R173 39
R175 39
R174 39
R176 39
R177 39
R178 39
R179 39
+12V
IC400
8
4
C144
0.022
IC117
RS232C
4
C2+
5
C2-
6
V-
2
V+
16
VDD
15
GND
3
C1-
1
C1+
89
11 14
1312
10 7
J110
J111
J112
R194
47K
R195
47K
R196
47K
+5VS
SW2
2
1
3
IC400
VAG
3
2
1
+12V
R150
2.7K
D105 6.2L
VAG
C155 100
R14
10K
R15
10K
R16
10K
IC122
2
1
4
R134 39
R133 39
+5V
+24V
R60
39
R61
39
R83 39
R84 39
R85 39
R86 39
R87 39
R88 39
IC402
14
7
+12V
C149
0.022
+5VS
C118
0.022
IC122
5
3
C115
0.022
+5V
IC124
5
3
D3
D2
D6
D0
D5
D7
D1
D4
IORD
IOWR
A0
CS(EXTG/A)
A3
RESET
A1
A2
CN5
10 NC
11 NC
12 NC
13 NC
43 A4
48 A5
44 CS(MODEM)
46 CS(CALL1)
39 A0
42 A1
24 A2
45 A3
25 D0
26 D1
27 D2
28 D3
29 D4
30 D5
31 D6
32 D7
37
IORD
38
IOWR
40 RESET
47 MODEMRXD
49 MODEMTXD
50
MODEMINT
22 +5V
23 +24V
35 AG
36 AG
R66 47K
R64 47K
R62 47K
R67 47K
R65 47K
R69 47K
R63 47K
R68 47K
+5VS
R108 39
L110
L111
L112
L114
L113
L115
L116
L117
L118
L119
L120
L121
L122
R420
39
R421
39
R422
39
R423
39
J120
J121
A10
A11
A12
A13
A14
A15
A17
A19
A11
A10
A13
A15
A14
A12
A16
A9
A8
A0,A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11,A12,A13,A14,A15,A16,A17,A18,A19
CS(EXTG/A)
D0
D1
D2
D3
D5
D4
D6
DSR
RS232CRXD
RS232CTXD
A2
A3
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
D0
D0,D1,D2,D3,D4,D5,D6,D7
A1
A0
D0,D1,D2,D3,D4,D5,D6,D7
DTR
D7
IOWR
IOWR
RESET
RESET
MODEMTXD
DCN4
DCN3
DCN2
DCN1
DHK4
DHK3
DHK2
DHK1
RTCCS
RTCCLK
RTCDATA
DOPN1
DOPN2
DOPN3
DOPN4
BUSY1
BUSY2
DRLY1
DRLY2
CS(DISADTMF)
A5
A4
CS(EXP308G/A)
CS(8*16)2
CS(4*8)3
CS(EXP08G/A)
CS(8*16)3
CS(4*8)4
CS(DINT)
D7
D6
D5
D4
D3
D2
D1
D0
A18
IORD
IORD
A7
A6
A5
A4
A3
A2
A1
A0
MODEMINT
MODEMRXD
ADDRESS
LATCH
CALLER ID CARD
CONNECTOR
I/O CS DECORDER
DOOR PHONE
CONTROL PORT
CPU
5V
0V
5V
0V
RS232C
DRIVER/
RECEIVER IC
FILTER
VAG
6V
5V
0V
5V
0V
5V
0V
ADDRESS LATCH
SYSTEM
CLEAR SW
DOOR PHONE
DOOR OPENER
CONTROL PORT
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