Panasonic KX-TA1232 Service Manual page 228

SERIAL-PARALLEL
CONVERT IC
32
36 TRNDT1
37 RTS1
46 DTR1
RCVDT1
R331A 47K 30
35 CTS1
DSR1
22
25 TRNDT2
RTS2
26
13 DTR2
20 RCVDT2
R332A 47K
23 CTS2
DSR2
R333A 47K
5
39 TRNCLK1
15 RCVCLK1
R334A 47K
27 TRNCLK2
RCVCLK2
33
CLK
+5V
40
VCC
47
GND
IC312
4 3
X302
4.9152MHz
4.9152M
R335
1M
DTMF RECEIVER CONTROL
R324 STDD
22
R325 STDC
22
CALLSTDA
CALLSTDB
R326 STDB
22
CALLSTDC
STDA
R327 22
CALLSTDD
CALLREVA
D[3]
CALLREVB
D[2] CALLREVC
D[1]
D[0]
TOED
CALLREVD
35 PA7
TOEC
STDA
14 PB0
STDB
15 PB1
TOEB
STDC
16 PB2
STDD
18 PB3
TOEA D[0]
19 PB4
D[1]
PQVIMS8C5A2G
20 PB5
D[2]
21 PB6
D[3]
23 PB7
TOEA
9 PC0
TOEB
10 PC1
TOEC
TOED
DTMFGA
DTMFGB
DTMFGC
DTMFGD
DTMFGD
DTMFGC
DTMFGB
DTMFGA
J304
N.C
32
36 TRNDT1
37 RTS1
46 DTR1
RCVDT1
R331C
47K 30
35 CTS1
DSR1
22
25 TRNDT2
RTS2
26
13 DTR2
20 RCVDT2
47K
R332C
23 CTS2
DSR2
R333C 47K 5
39 TRNCLK1
15 RCVCLK1
R334C 47K
27 TRNCLK2
RCVCLK2
33
CLK
+5V
40
VCC
47
GND
SERIAL-PARALLEL
CONVERT IC
DA1,DA2
IC303A
7 CS0N
CS1
12
CS1N
CS2
8
DA1
RSLCT0
RSLCT1 11 DA2
DB0 41 D0
42 D1
DB1
44 D2
DB2
DB3 45
D3
1
D4
DB4
2
D5
DB5
3 D6
DB6
4 D7
DB7
6
IOWN
W
9
IORN
R
RST 34
RST
28
TRNRDY1
10
RCVRDY1
SYNC/BRX1 29
31
TRNEMP1
17
TRNRDY2
16
RCVRDY2
18
SYNC/BRX2
TRNEMP2 21
ADRESS
DA1
RST
DA2
D0 DATA
D0 32
D1
D1 31
D2
D2 30
D3
D3 29
D4
D4 28
D5
IC304
D5 27
D6
D6 26
D7
D7 25
IORN
RD 44
IOWN
WR 34
CS 1
+5V
G/A
RST
IC312
RST
6 5
IC303C
CS1 7 CS2N
CS2 12 CS3N
RSLCT0 8 DA1
RSLCT1 11 DA2
DB0 41 D0
DB1 42 D1
DB2 44 D2
DB3 45 D3
DB4 1 D4
2 D5
DB5
DB6 3 D6
DB7 4 D7
W 6 IOWN
9 IORN
R
RST 34
RST
TRNRDY1 28
10
RCVRDY1
SYNC/BRX1 29
TRNEMP1 31
TRNRDY2 17
16
RCVRDY2
SYNC/BRX2 18
21
TRNEMP2
12
11
13
IC311
IC306
DA1 3 1C 1
1Y
DA2 6 2C 4
2Y
8 3C 10
3Y
11 4C 13
4Y
+5V
1A 2
14 2A 5
Vcc
3A 9
4A 12
7
GND
IC307
74LS138
15 1
Y0 A
14 2
Y1 B
3
13
Y2 C
12
Y3
+5V
11
Y4
10 6
5
Y5 G1
4
9
0
Y6 G2A
5
7
Y7 G2B
5
0
C316
0.022
+5V
+5V
IC305
4
COL1
5
COL2
6
COL3
11
COL4
17
ROW1
16
ROW2
15
ROW3
14
ROW4
18
NC
C324
0.1
+5V +5V
16 20
8 10
IC312
1
3 10 11
2
IC311
IC310
1
9
8 4
10
2
4
6
IC311
5
IC311
IC308
SN74LV273
DA[1] 2 3 D1
5 Q1 D1
DA[2] 4 D2
6 Q2 D2
7 D3
9 Q3 D3
8 D4
12 Q4 D4
DA[5] 13 D5
15 Q5 D5
DA[6]
14 D6
16 Q6 D6
DA[7] 17 D7
19 Q7 D7
18
Q8 D8
11
CLK
CLR
1
IC312
9 8
IC309
C326
10
20 0.1
IC309
12
TONE
8 9
19
6
3 4
CD
IC309
2
5
XMIT
12
MUTE
9
OSCI
13
NC
8
NC
3
NC
10
OSCO
+5V +5V
+5V
14 5 14
3 7
7
CN301
PQJP22A45ZA-HT
D0
10
D1
11
D2
12
D3
13
D4
14
D5
15
D6
16
D7
17
RST
22
IORN
7
IOWN
8
A1
1
A2
2
A3
3
A4
4
A5
5
CIDSEL
9
CSN
21
20
19
18
6
CN303
IC309
PQJP04A45ZA-HT
1 2
1
13
2
11
3
4
+5V
14
12
13
7