Panasonic KX-TA308 Service Manual page 8

PROTECTOR
1V
+12V
-1V
PULSE
TRANSFORMER
(1) T301
TXD 6
C325 1
7
2
(2) RXD 9
4
10
R348
(3)
C335
1
100
(4)
DC CUT
Q308
CAPACITOR
+5V
0.6V
+24V
(5)
R393
4.7K
Q310
Q309
+5V
(6)
R391
(7)
10K
(8)
(9)
(10)
(11)
(12)
(13)
(14)
C324F
EXT6
L302F
CN30F
0
1
H 1
L 4
L303F
0
RLY30F
8
L300F
9
10
0
CN30F
C323F
T 2 ZNR30F
NO MOUNT
39V
R 3
C321F
RLY30F
L301F
3
4
0
5 ZNR31F
39V
C324G
EXT7
L302G 1
CN30G
0
H 1
4
L
L303G
0
RLY30G
8
L300G
CN30G 9
10
0
C323G
2
T ZNR30G
NO MOUNT
39V
R 3
C321G
RLY30G
L301G
3
4
0
5
ZNR31G
39V
C324H
L302H
1
EXT8
CN30H
0
H 1
L 4
L303H
0
RLY30H
8
L300H
9
10
CN30H
0
C323H
T 2
NO MOUNT ZNR30H
39V
R 3
RLY30H
L301H
3
4
0
5
ZNR31H
39V
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
(15)
4ms
+5V
12
4ms
R343
13
Q306 11
2.2K
IC302
9
10
8 IC302
IC302
1 R346 R347 2ms
3 5
4
6
2
10K
10K
IC302
5V 5V
4ms 4ms
0V 0V
BREAK CONTROL SW
R353 47K
Q311
R352 47K
R351 47K
+12V
OVER CURRENT
12V
0V
DETECT
8ms
Q314
12V
0V
4ms
12V
0V
16ms
R301F
Q304F R341F
47 68
R302F D302F
2V
10K
C322F
C320F T300F
2.2
D300F
3
0.022 4
1 6
D301F
0.022
D303F
R310F
VAG
10K
2V
68
R303F
47 R340F
Q301F
R304F
6.8K
R305F
56K
Q304G R301G
R341G
68
47
D302G
R302G
10K 2V
C322G
C320G T300G
2.2
D300G
3
0.022 4
1 6
D301G
0.022
R310G D303G
VAG
10K 2V
68
R303G
Q301G 47 R340G
R304G
R305G
6.8K
56K
R301H
Q304H R341H
68
47
R302H D302H
10K 2V
C322H
C320H T300H
2.2
D300H
3
0.022 4
1 6
C321H
D301H
0.022
D303H
R310H
VAG
10K 2V
68
R303H
47 R340H
Q301H
R304H
R305H
6.8K
56K
4ms
5V
4 BIT CPU
+5V
0V
IC304
35 7
PRX1 CRXD0
P60
P12
6
CRXD1
P61
28
PCLR
P80 5
CRXD2
P62
4
CRXD3
P63
41
PTX1
36
CREQ
P22
P11
15
PA
P41
14 3
PB CTXD0
P70
P42
2
13
PC CTXD1
P71
P43
1
CTXD2
P72
26 44
CTXD3
ACK1
P73
P30
25 40
CACK
ACK2
P23
P31
30 37
SD1 CINT
P10
P02
29
SD2
P03
9 24
ACK3
STD1
P32
P52
8 23
ACK4
STD2
P33
P53
R350
16 32
SD3
P40 P00
+5V
34 31
47K SD4
P01
NC
12 11
STD3
P50
NC
10
+5V STD4
P51
39 27
PTX2
P81
VDD
38 33
PRX2
P13
VCC
42
350Hz
P21
43
620Hz
P20
17 21
X1
VEE
19 22
XT2 X2
18 20
XT1 RESET
+5V
TXD6
RXD
BELL
R317F
R316F
3.9
TXPOWER
2W/100
Q313F
EXT6
H=ON BELL
L=OFF RELAY
CONTROL
+5V
HOOK6
+24V
Q305F
Q307F
H=ON HOOK HOOK
L=OFF HOOK DETECT
TXD7
RXD
BELL
R317G
R316G
3.9
TXPOWER
2W/100
Q313G
EXT7
+5V
HOOK7
+24V
Q305G
BELL7
Q307G
TXD8
RXD
BELL
R317H
R316H 3.9
TXPOWER
2W/100
Q313H
EXT8
+5V
HOOK8
+24V
Q305H
BELL8
Q307H
5V
0V
5V
0V
NORMALY 0V
DTMF RECEIVE 5V
NORMALY 5V
DTMF RECEIVE 0V
NORMALY 0V
DTMF RECEIVE 5V
15P C333
+5V
R357
100
15P C334
4MHz
OPTION CARD
DETECT
0V AT
EXT G/A
RESET
IC305
5V
4
CTXD0
P00
5
CTXD1
P01
6
CTXD2
0V P02
7
CTXD3
P03
CINT 8
P04
9
P05
10
PDRLY
P06
11
RESET4BIT
P07
BELL1 13
P10
BELL2 14
P11
15
BELL3
P12
BELL4 16
P13
17
BELL5
P14
BELL6 18
P15
BELL7 19
P16
20
BELL8
P17
21
HOOK1
P20
HOOK2 24
P21
HOOK3 25
P22
26
HOOK4
P23
HOOK5 27
P24
HOOK6 28
P25
HOOK7 29
P26
HOOK8 30
P27
36
CNG1
P30
37
VOX1
P31
EOM1 38
P32
39
STD9
P33
40
RESET1
P34
P/R1 41
P35
44
CE1
P36
OGMSW1 45
P37
46
CNG2
P40
VOX2 47
P41
48
EOM2
P42
STD10 49
P43
50
RESET2
P44
51
P/R2
P45
CE2 53
P46
54
OGMSW2
P47
EXT1
+5V
14
IC302
7
KX-TA308 MAIN BOARD NO.1 (2/2)
ACK3
ACK4
SD3
SD4
STD3
STD4
47K R319
+5V
47K R325
350Hz
620Hz
PITS DATA +5V
FOR EXT
109~116
CN3
R370 330
4 PTX2
R371 330
PRX2
10
R372 330
PCLR
12
R373 330
PA
8
R374 330
6 PB
R375 330
5 PC
R329 330
EXP308CARD
13
R322 330
DINTCARD
14
NC
3
EXP 308 CARD
7 NC
CONNECTOR
NC
9
NC
11
AG
35
36 AG
AG
1 VAG
VAG VAG
2
ACK1
ACK1
ACK2
ACK2
SD1
SD1
SD2
SD2
STD1
STD1
STD2
STD2
+5V
55
CRXD0
P50
56
CRXD1
P51
57
CRXD2
P52
58
CRXD3
P53
59 CREQ
P54 5
60
BR1
P55
DETECT
61
OL1
P56
64 0
CACK
P57
EXP 308 CARD
EXP308CARD
31
P60
CN2
32
DISACARD R288
P61
34
EXP08CARD
P62
10
35 DINTCARD
P63 330
EXP08CARD
68 D0
D0
D0
69 D1
D1
D1
70 D2
D2
D2
D3
71 D3
D3
72 D4
D4
D4
74 D5
D5
D5
D6
75
D6
D6
76 D7
D7
D7
A0
77
A0
A0
78 A1
A1
A1
A2
79
A2
A2
80 A3
A3
A3
IORD IORD
66
RD
65 IOWR
IOWR
WR
CS(EXTG/A)
67
CS CS(EXTG/A)
1
RESET
RST RESET
+5V
5V
33
VDD
DATA
73
VDD
3 0V
NC
22
NC
62
NC
5V
43
NC
42 ADDRESS
VSS
52
VSS 0V
2
VSS
12
VSS
+5V
23
VSS
63
VSS
CN4
R110 330
24 DISACARD
R103 330
CE2
5
R102 330
P/R2
4
R101 330
RESET2
6
R100 330
7 STD10
R99 330
2 EOM2
R98 330
VOX2
1 DISA CARD
R97 330 CONNECTOR
CNG2
3
R96 330
CE1
9
R95 330
11 P/R1
R94 330
RESET1
12
R93 330
STD9
8
R92 330
EOM1
10
R91 330
13 VOX1
R90 330
14 CNG1
OGMSW2
OGMSW1
EXT1
EXT2
EXT2
EXT3
EXT3
EXT4
EXT4
EXT5
EXT5
EXT6
EXT6
EXT7
EXT7
EXT8
EXT8
BELL
BELL