Panasonic KX-TA308 Service Manual page 18

(1)
47K
(2)
(3)
47K
(4)
47K
(5)
47K
(6)
(7)
(8)
(9)
0.1 C18A
(10)
(11)
(12)
(13)
(14)
(15)
(16)
(17)
(18)
(19)
(20)
(21)
(22)
(23)
SERIAL-PARALLEL
CONVERT IC
IC3A
32 7
TRNDT1 CS1
36 12
RTS1 CS2
37 8 A0
DTR1 RSLCT0
46 11 A1
RCVDT1 RSLCT1
D0
R13A 30 41
CTS1 DB0
D1
35 42
DB1
DSR1
22 44 D2
TRNDT2
DB2
D3
25 45
RTS2
DB3
D4
26 1
DB4
DTR2
D5
13 2
RCVDT2 DB5
R13B 20 3 D6
CTS2 DB6
D7
23 4
DSR2 DB7
R14A 5 6 IOWR
TRNCLK1 W
39 9 IORD
RCVCLK1
R
R14B 15 34 RESET
TRNCLK2
RST
27 28
TRNRDY1
RCVCLK2
10
RCVRDY1
33 29
SYNC/BRX1
CLK
+5V 31
TRNEMP1
40 17
TRNRDY2
VCC
16
RCVRDY2
18
SYNC/BRX2
21
TRNEMP2
47
GND
IC16
4 3
X2
4.9152M
R18
4.9152MHz
1M
IORD
IOWR
RESET
+5V
IC3C
32 7
TRNDT1 CS1
36 12
RTS1 CS2
37 8 A0
RSLCT0
DTR1
46 11 A1
RCVDT1 RSLCT1
47K R13C 30 41 D0
CTS1
DB0
35 42 D1
DB1
DSR1
22 44 D2
TRNDT2 DB2
D3
25 45
RTS2 DB3
26 1 D4
DTR2 DB4
13 2 D5
RCVDT2 DB5
R13D
47K 20 3 D6
CTS2 DB6
47K R16 23 4 D7
DSR2
DB7
47K R14C 5 6
IOWR
TRNCLK1
W
39 9
IORD
RCVCLK1
R
R14D
47K 15 34 RESET
TRNCLK2 RST
47K R15D 27 28
RCVCLK2 TRNRDY1
10
RCVRDY1
33 29
SYNC/BRX1
CLK
+5V 31
TRNEMP1
40 17
VCC TRNRDY2
16
RCVRDY2
18
SYNC/BRX2
21
TRNEMP2
47
GND
SERIAL-PARALLEL CONVERT
D0,D1,D2,D3,D4,D5,D6,D7
A0,A1,A2,A3
IORD,IOWR,RESET
IC7
4 2
Y0 SELA
5 3
Y1 SELB
6
Y2
7 1
Y3 G
HC139
CO SELECTOR
C30
0.022
+5V
IC14
4 20
COL1
COL1 TONE
0.1
5 19
COL2
C40
COL2 CD
6 2
COL3
COL3 XMIT
11 12
COL4
COL4 MUTE
17 9
ROW1
ROW1 OSCI
16 13
ROW2
ROW2 NC
15 8
ROW3
ROW3 a
14 3
ROW4
ROW4 NC
10
18
NC
OSCO
DTMF GENERATOR
+5V +12V
16 8
6
13
14 5
15
4
8
+5V +5V
8 8
4 4
KX-TA308 CALLER ID CARD (2/2)
D0
D1
D2
D3
D4
D5
D6
D7
RESET
IORD
IOWR
A0
A1
A2
A3
+12V
Q42
Q41
Q40
13
1 2
R46
47K
IC10
12
C42
10 11
R45 R44
0.0015
IC10
12K 0
2
6
C61
1
3
8 9
0.1
IC10
IC15
DTMF AMPLIFIER
+5V
+5V
+24V
Q43
+12V
R47
2.7K
+12V
+5V
14
14
5
5
11
9 13
7
7
+5V
8
4
CN1
25 D0
26 D1
27 D2
28 D3
29 D4
30 D5
31 D6
32 D7
40 RESET
37 IORD
38 IOWR
39 A0
42 A1
24 A2
45 A3
43 A4
48 A5
46 CS(CALL)
CN1
41 CO3(CO8)
47 MODEMRXD
34 CO2(CO7)
49 MODEMTXD
33 CO1(CO6)
44 CS(MODEM)
50 MODEMINT
10 OPEN
11 OPEN
12 OPEN
13 OPEN
22 +5V
23 +24V
20 CALLIDCARD
21 PAYTONECARD
35 AG
36 AG