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Schematic Diagrams
B - 24 LPT/COM Port (71-D4000-D04)
B.Schematic Diagrams
LPT/COM Port
Sheet 23 of 35
LPT/COM Port
VDD3
+5V
+5V
VDD5
+5V
VDD5
CTSA#[22]
DCDA#[22]
DSRA#[22]
DTRA[22]
RTSA#[22]
SOUTA[22]
SINA[22]
RIA#[22]
PACK#[22]
PBUSY[22]
PPE[22]
PSLCT[22]
PSTB#[22]
PATFD#[22]
PSLIN#[22]
PME# [19,22,24,25]
PINIT#[22]
PPERR#[22]
PD[0..7][22]
COM1RI
COM1RI
PPERR#
PSLIN#
PD1
PD0
PATFD#
PSTB#
PBUSY
PACK#
PPE
PSLCT
PATFD#
PBUSY
PSTB#
PPE
PSLCT
PACK#
SINA
RTSA#
DTRA
RIA#
CTSA#
DSRA#
SOUTA
DCDA#
PD4
PD5
PD7
PD6
PD2
PSLIN#
PINIT#
PD3
PME#
PD3
PD2
PD5
PD[0..7]
PD7
PD4
PD6
PD1
PINIT#
PPERR#
PD0
R2 2K
RP2
10P8R-4.7K
1
2
3
4
5
10
9
8
7
6
1
2
3
4
5
10
9
8
7
6
Q1
2N7002
G S
D
R223
100K
RP1
10P8R-4.7K
1
2
3
4
5
10
9
8
7
6
1
2
3
4
5
10
9
8
7
6
R1 FCM1608K221
C267
0.1UF(K%)
C247
0.1UF(K%)
C268
0.1UF(K%)
D24
1SS355
A C
C246
0.1UF(K%)
C260
0.1UF
RN2 FCA3216K4-221
81
72
63
54
RN3 FCA3216K4-221
81
72
63
54
CP4
8P4C-180P
18
27
36
45
C2
180P
CP1
8P4C-180P
18
27
36
45
CP5
8P4C-180P
1 8
2 7
3 6
4 5
CP6
8P4C-180P
1 8
2 7
3 6
4 5
JPRT1
PRT_PORT
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
28
29
RN10
FCA3216K4-121
1 8
2 7
3 6
4 5
R224
100K
T
U19
MAX3243
28
24
1
2
14
13
12
20
19
18
17
16
15
23
22
21
27
3
9
10
11
4
5
6
7
8
25
26
C1+
C1-
C2+
C2-
T1IN
T2IN
T3IN
R2OUTB
R1OUT
R2OUT
R3OUT
R4OUT
R5OUT
FORCEON
/FORCEOFF
/INVALID
V+
V-
T1OUT
T2OUT
T3OUT
R1IN
R2IN
R3IN
R4IN
R5IN
GND
VCC
R226 100K(R)
R225 100K
CP3
8P4C-120P
18
27
36
45
CP2
8P4C-120P
18
27
36
45
RN4 FCA3216K4-221
81
72
63
54
RN1 FCA3216K4-221
81
72
63
54
RN9
FCA3216K4-121
1 8
2 7
3 6
4 5
JCOM1
COM1_DB9
5
9
4
8
3
7
2
6
1
12
13