(a)
(b)
(c)
(d)
(e)
(f)
(g)
(29)
(30)
(32)
(33)
(34)(35)
(37)(38)
(39)
(40)
(44)
(45)
(42)(41)
(46)(47)(48)(49)(50) (52) (54)(51)
(53)
(55)
(56)(57)(58)(59)(60)(61)(62)
(43)
(31)
KX-TA308 MAIN BOARD NO.3 (3/4)
(36)
3/4
IC106
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
C104
0.022
+5V
C148
0.022
+5VS
R112
1M
R115
150
X100
24MHz
C112
15P
C101
15P
R161
47K
R162
47K
+5VS
+5VS
R151
470
D104
+5V
R149
180K
R148
20K
C121
0.082
C120
0.082
R147 390K
IC112
5
6
7
R146
33K
R145
47K
C107
50V3.3
IC101
ROM(2M)
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
OE24
A7
5
A6
6
A5
7
A4
8
A3
9
A2
10
A1
11
A0
12
CE
22
VCC
32
GND
16
A8
27
A9
26
A10
23
A11
25
A12
4
A13
28
A14
29
A15
3
A16
2
PRG
31
A17
30
VPP
1
Q105
R141
4.7K
R143
68K
R142
22K
R140
1K
IC115
56
D100
20V
+24V
+5V
+5VS
R139
18K
+5VS
SW1
IC115
98
IC115
11 10
IC115
13 12
IC115
12
IC115
34
C109
2.2
R144
27K
C108
0.1
+5V
TP60
(TESTPOINT)
IC110
CLOCKIC
1
CE
2
SCLK
3
SIO
4
VSS
5
INTR
6
OCSOUT
7
OSCIN
8
VDD
X103
32.789MHz
C12820P
D101
D404
R411
680
+5V
D102
J104
OPEN
C137
0.022
IC123
+5B
1
2
4
C15033
R181
39
R182
39
R183
39
R184
39
R185
39
R186
39
R187
39
R188
39
R189
39
R190
39
R191
39
R180
39
IC111
RESETIC
3
1
2
R199
39
R198
39
R197
39
BATT
C15133
IC112
3
2
1
Q133
IC102
RAM(1M)
D0
13
D1
14
D2
15
D3
17
D4
18
D5
19
D6
20
D7
21
OE
24
A7
5
A6
6
A5
7
A4
8
A3
9
A2
10
A1
11
A0
12
VCC
32
GND
16
A8
27
A9
26
A10
23
A11
25
A12
4
A13
28
A14
3
A15
31
A16
2
S2
30
NC
1
WE
29
S1
22
IC124
24
R953
10K
CN1
4 +6V
7 BELL
1 ACDOWN
6 FRQ
2 +24V
3AG
5AG
+5V
+24V
R51
39
R52
39
R53
39
R54
39
R55
39
R56
39
R57
39
R58
39
+5VS
D103
C100
0.047F
J103
OPEN
+24V
IC103
1
VCC
2
GND
3
OUT
+12V
C157
33
C158
0.1
R80
39
R81
39
R82
39
C129
0.022
BELL
CS(COG/A)
J113
CN2
1AG
2AG
9 BELL
20 A0
19 A1
22 A2
21 A3
24 A4
23 A5
26 A6
28
IORD
25
IOWR
27 RESET
17 D0
18 D1
15 D2
16 D3
13 D4
14 D5
11 D6
12 D7
30 CS(CALL2)
35 CS(EXP308G/A)
36 CS(8*16)2
33 CS(4*8)3
34 CS(EXP08G/A)
31 CS(8*16)3
32 CS(4*8)4
29 CS(DINT)
6 +5V
7 +5V
8 +5V
3 +24V
4 +24V
5 +24V
+12V +12V
+12V
CN12
1
4M
2
N
3
2M
R152
100/1W
J300
A10
A12
A13
A15
A14
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A11
RTCCS
RTCCLK
RTCDATA
DHK1,DHK2,DHK3,DHK4,DCN1,DCN2,DCN3,DCN4,DOPN1,DOPN2,DOPN3,DOPN4,BUSY1,BUSY2,DRLY1,DRLY2
CS(EXTG/A)
LEDSW
A17
A19
A0
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
D1
D2
D3
D4
D5
D6
D7
D0
D1
D2
D3
D4
D5
D6
D7
D7
D6
D5
D4
D3
D0
D1
D2
D0,D1,D2,D3,D4,D5,D6,D7
A0
A1
A2
A3
A6
A5
A4
A15
D0
CS(8*16)1
CS(4*8)1
CS(CALL1)
CS(COG/A)
RESET
CS(MODEM)
CS(4*8)2
CS(8*16)1,CS(4*8)1,CS(4*8)2,CS(DISADTMF)
RTCCS,RTCCLK,RTCDATA
ACDOWN
IOWR
RESET
+5VB
BELL
CS(CALL2)
A16
IORD
A18
MAIN-POWER
CONNECTOR
H:LED ON
L:LED OFF
512K:OPEN
1M :0
CLOCK
LOW PASS FILTER
BELL SIGNAL PULSE
DC POWER DOWN DETECT
CIRCUIT
CPU CLOCK
RESET
CIRCUIT
I/O CS DECORDER
24MHz
LED
CONTROL
WAVE
ROM
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
RAM
0V
+12V
REGULATOR
LITHIUM
BATTERY 3V
4M/2M
CONTROL SW
32MHz
5V
0V
0V AT RESET
NOMALY 5V
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