(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
(12)
(13)
(14)
(15)
T301
2
4
6
7
9
10
R318
330
ZNR33
R343
2.2K
R348
100
C325
1
+5V
Q308
IC302
1
2
3
R346
10K
R347
10K
IC302
5
6
4
C329
100P
D391
R344
4.7K
Q306
R345
1K
IC302
12
13
11
IC302
9
8
10
Q309
R392
0
R393
4.7K
Q311
C331
0.022
+24V
+5V
+5V
IC302
14
7
+5V
C328
0.022
L302H
0
T300H
3
16
4
D302H
2V
L300H
0
C324H
1
R301H
47
C320H
0.022
R342H
15K
CN30H
1H
4L
Q304H
ZNR32H
39V
ZNR30H
39V
R341H
68
L301H
0
CN30H
2T
3R
C321H
0.022
+24V
L303H
0
R302H
10K
C322H
2.2
L305H
1.5mH
C324F
1
L302F
0
Q304F
L303F
0
+24V
L301F
0
L300F
0
R302F
10K
R301F
47
CN30F
2T
3R
R342F
15K
D302F
2V
CN30F
1H
4L
ZNR32F
39V
L305F
1.5mH
ZNR30F
39V
T300F
3
16
4
C321F
0.022
R341F
68
C322F
2.2
C320F
0.022
C324G
1
L302G
0
Q304G
L303G
0
+24V
L301G
0
L300G
0
R302G
10K
R301G
47
CN30G
2
T
3
R
R342G
15K
D302G
2V
CN30G
1
H
4
L
ZNR32G
39V
L305G
1.5mH
ZNR30G
39V
T300G
3
1
6
4
C321G
0.022
R341G
68
C322G
2.2
C320G
0.022
+5V
IC304
P72
1
P71
2
P70
3
P11
36
P00
32
X1
21
P13
33
P81
27
P51
10
P53
8
P52
9
P03
29
P02
30
P41
15
P22
41
P80
28
P12
35
P33
23
P32
24
P10
37
P23
40
P73
44
P50
11
P01
31
XT1
18
XT2
19
VEE
17
VCC
38
VDD
39
NC
12
NC
34
P40
16
P43
13
P42
14
P31
25
P30
26
P60
7
P61
6
P62
5
P63
4
X2
22
RESET
20
P21
42
P20
43
R340F
68
Q301F
R310F
10K
ZNR31F
39V
R303F
47
D303F
2V
R340G
68
Q301G
R310G
10K
ZNR31G
39V
R303G
47
D303G
2V
R340H
68
Q301H
R310H
10K
ZNR31H
39V
R303H
47
D303H
2V
IC305
P10
13
P11
14
P12
15
P13
16
P14
17
P15
18
P16
19
P17
20
P20
21
P21
24
P22
25
P23
26
P24
27
P25
28
P26
29
P27
30
P30
36
P31
37
P32
38
P33
39
P34
40
P35
41
P36
44
P37
45
P40
46
P41
47
P42
48
P43
49
P44
50
P45
51
P46
53
P47
54
P50
55
P51
56
P52
57
P53
58
P54
59
P55
60
P56
61
P57
64
VSS
2
VSS
12
VSS
23
VSS
63
D0
68
D1
69
D2
70
D3
71
D4
72
D5
74
D6
75
D7
76
VDD
33
VDD
73
NC
3
NC
22
NC
62
NC
43
P00
4
P01
5
P02
6
P03
7
P04
8
P05
9
P06
10
P07
11
A0
77
A1
78
A2
79
A3
80
RD
66
WR
65
CS
67
RST
1
P60
31
P61
32
P62
34
P63
35
VSS
52
VSS
42
+5V
C300
0.022
+5V
R324
47K
R27247K
+5V
R326
47K
R305F
56K
+
-
RLY30F
12
1
D310F
Q307F
R311F
47K
Q305F
D306F
C314F
0.039
R306F
27K
R304F
6.8K
+5V
Q307G
+
-
RLY30G
12
1
R305G
56K
C314G
0.039
R304G
6.8K
+5V
Q305G
D310G
R306G
27K
R311G
47K
D306G
Q307H
+
-
RLY30H
12
1
R305H
56K
C314H
0.039
R304H
6.8K
+5V
Q305H
D310H
R306H
27K
R311H
47K
D306H
R315F
1W1K
R315G
1W1K
R315H
1W1K
R327
47K
X300
4MHz
C33315P
C33415P
+24V
+24V
+24V
R316F
2W/100
R316G
2W/100
R316H
2W/100
R329
330
R110
330
R322
330
R370 330
R371 330
R372 330
R373 330
R374 330
R375 330
CN2
10
EXP08CARD
R288
330
R103 330
R102 330
R101 330
R100 330
R99 330
R98 330
R97 330
R96 330
R95 330
R94 330
R93 330
R92 330
R91 330
R90 330
CN4
24 DISACARD
5
CE2
4
P/R2
6
RESET2
7
STD10
2
EOM2
1
VOX2
3
CNG2
9
CE1
11
P/R1
12
RESET1
8
STD9
10
EOM1
13 VOX1
14 CNG1
R166 47K
R167 47K
R21 47K
R165 47K
R19 47K
R168 47K
+5V
R20
47K
R22
47K
+5V
R328
47K
R352 47K
+5V
R353 47K
R351 47K
R350
47K
RLY30F
9
8
10
RLY30G
9
8
10
RLY30H
9
8
10
RLY30F
4
5
3
RLY30G
4
5
3
RLY30H
4
5
3
+12V
R357
100
R356
1M
ACK3
ACK4
SD3
SD4
STD3
STD4
350Hz
620Hz
ACK1
ACK2
SD1
SD2
STD1
STD2
A3
RESET
D7
D3
A2
CS(EXTG/A)
D2
D0
A0
IOWR
D5
D4
A1
IORD
D6
D1
OGMSW2
OGMSW1
EXT4
EXT8
EXT2
BELL
EXT3
EXT6
EXT7
EXT5
EXT1
R32547K
R323
47K
+5V
+5V
R31947K
VAG
D392
+5V
CN3
4
PTX2
10
PRX2
12
PCLR
8
PA
6
PB
5
PC
13
EXP308CARD
14
DINTCARD
3
NC
7
NC
9
NC
11
NC
35
AG
36
AG
1
VAG
2
VAG
+5V
R391
10K
R399
5.6K
Q310
R317F
3.9
Q313F
R317G
3.9
Q313G
R317H
3.9
Q313H
Q314
R398
47K
VAG
VAG
VAG
D300F
D301F
D300G
D301G
D300H
D301H
C323F
NO MOUNT
C323G
NO MOUNT
C323H
NO MOUNT
C326
0.033
AG
D307F
D307G
D307H
C335
1
D393
D394
+12V
R394
27K
R395 27K
R312F
OPEN
R312G
OPEN
R312H
OPEN
PRX1
EXT2
EXT3
EXT4
EXT5
EXT6
ACK1
ACK2
SD1
SD2
ACK1,ACK2,SD1,SD2,STD1,STD2
ACK1
ACK2
SD1
SD2
STD1
STD2
EXT8
EXT7
EXT6
EXT8
EXT7
BELL
BELL
BELL
EXT1,EXT2,EXT3,EXT4,EXT5,EXT6,EXT7,EXT8,BELL1,BELL2,BELL3,BELL4,BELL5,BELL6,BELL7,BELL8,HOOK1,HOOK2,HOOK3,HOOK4,HOOK5,HOOK6,HOOK7,HOOK8,BELL
BELL1
BELL2
BELL3
BELL4
BELL5
BELL6
BELL7
BELL8
HOOK1
HOOK2
HOOK3
HOOK4
HOOK5
HOOK6
HOOK7
HOOK8
CRXD0
CRXD0
CRXD1
CRXD1
CRXD2
CRXD2
CRXD3
CRXD3
CREQ
CREQ
CTXD0
CTXD0
CTXD1
CTXD1
CTXD2
CTXD2
CTXD3
CTXD3
CINT
CINT
D7
D6
D4
D5
IOWR
IORD
D1
D0
CS(EXTG/A)
A2
A0
A3
A1
D2
D3
PDRLY
HOOK6
BELL6
BELL7
HOOK7
BELL8
HOOK8
CACK
CACK
BR1
PTX2
PB
PA
PC
EXP308CARD
DINTCARD
EXP08CARD
DISACARD
CE2
P/R2
RESET2
CE1
P/R1
RESET1
OGMSW2
OGMSW1
EOM2
VOX2
CNG2
EOM1
VOX1
CNG1
STD9
STD10
PTX1
STD4
STD3
SD4
SD3
STD2
STD1
ACK3
ACK4
620Hz
350Hz
PRX2
PCLR
RESET4BIT
TXPOWER
TXPOWER
TXPOWER
BELL
OL1
RESET
TXD6
TXD7
TXD8
TXD
RXD
RXD
RXD
RXD
EXT1
EXT7
EXT8
EXT6
EXP 308 CARD
CONNECTOR
EXP 308 CARD
DISA CARD
CONNECTOR
KX-TA308 MAIN BOARD NO.1 (2/2)
PROTECTOR
PULSE
TRANSFORMER
5V
0V
5V
0V
4ms
4MHz
12V
0V
1V
4ms
4ms
-1V
DC CUT
CAPACITOR
0.6V
2ms
4ms 4ms
4ms
8ms
OVER CURRENT
DETECT
BREAK CONTROL SW
12V
0V
16ms
12V
0V
5V
4 BIT CPU
0V
5V
0V
5V
NORMALY 0V
DTMF RECEIVE 5V
0V
NORMALY 0V
DTMF RECEIVE 5V
PITS DATA
FOR EXT
109~116
EXT G/A
DETECT
DATA
ADDRESS
5
0
0V AT
RESET
H=ON
BELL
RELAY
CONTROL
L=OFF
H=ON HOOK HOOK
DETECT
OPTION CARD
DETECT
L=OFF HOOK
NORMALY 5V
DTMF RECEIVE 0V
5V
0V
5V
0V
5V
0V
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