Samsung WC-M15i Series Service Manual page 138

Schematic DiagramsSchematic Diagrams
8-6. Localtalk diagram
VCC
C1
J3 33UF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
CON30
Samsung Electronics
U6 U6 U6 U6
1 2 3 4 5 6 9 8 11
74LS14 74LS14 74LS14 74LS14
D(0:7)
U5
1
D(0)
3
D(1)
2
D(2)
74F32
D(3)
U5
4
D(4)
6
5
D(5)
SCC_CS* SCC_CS*
D(6)
74F32
D(7)
VCC
LF1
FILTER-150PF R1
VCC OSC1
68
4 3
VCC CLK
1 3
2
2 1
GND NC
7.3728MHZ
C17
0.1UF
R3
U6 U6
33
10 13 12
74LS14 74LS14
SCC_CS*
R4
33
(N.A)
VCC
C18
0.1UF
U1
10
VCC
1 22
D(0)
D0 DCDA
2 14
D(1)
D1 RXDA
44 16
D(2)
D2 TXTA
3 15
D(3)
D3 TRXCA*
D(4) 43 13
D4 RTXCA*
4 12
D(5)
D5 SYNCA*
42 11
D(6)
D6 W_REQA*
5 19
D(7)
D7 DTRA*
20
RTSA*
41 21
RD* CTSA*
40
WE*
24
Z85230 DCDB
39 31
A_B* RXDB
38 29
CE* TXTB
37 30
D_C* TRXCB*
32
RTXCB*
R16
9 33
10K INTACK* SYNCB*
8 34
IEI W_REQB*
7 27 U7
IEO DTRB*
6 26 1
INT* RTSB*
25
CTSB*
23 74LS14
PCLK
C23
R5 330PF
GND1 GND2
33
35 36
VCC
U4
R6
33
R2
2 5
68 D Q
C14
100PF
3
CLK
6
C15
Q_
100PF
74LS74
VCC
VCC
C19 C16 C22
0.1UF 0.1UF 0.1UF
VCC
C20
0.1UF
VCC
C2
U3
1UF
16
C4
VCC
1UF
1 2 R15
C1+ Y+
4
C2+
C3
1UF
3
C1-
C5
5 6
1UF
MAX232
C2- Y-
11 14
T1_IN T1_OUT
10 7
T2_IN T2_OUT
12 13
R1_OUT R1_IN
9 8
R2_OUT R2_IN
C6 C7 C8 C9
330PF 330PF 330PF 330PF
GND
15
VCC
2
C21
0.1UF
U2
C12 C13
14
MAX491
330PF 330PF
VCC
Y 9 R7 27 R8 27
5 DI
Z 10 R9 27 R10 27
4 DE
A 12 R11 27 R12 27
3
_RE
B 11 R13 27 R14 27
2 RO
GND2 GND1
C10 C11
330PF 330PF
7 6
3 4
U7
74LS14
5 6
U7
74LS14
C24 9 8
U7
0.1UF
74LS14
11 10
U7
74LS14
13 12
U7
74LS14
J1
1K 1
6
B1 1 2 BEAD 2
7
B4 1 2 BEAD 3
B3 1 2 BEAD 8
4
B21 BEAD 2
9
B5 1 BEAD 2 5
DESUB-9P
J2
6
3
B61 BEAD 2 4
1
7
2
B7 1 BEAD 2 8
B81 BEAD 2 5
DIN-8P
8-21