Lpt/Com Port - EUROCOM D47EV Service Manual

Schematic Diagrams

LPT/COM Port

22 SOUTA
22 RTSA#
22 DTRA
22 DSRA#
22
22 CTSA#
22
22 DCDA#
Sheet 23 of 42
VDD5
+5V
LPT/COM Port
B - 24 LPT/COM Port (71-D40U0-D04A)
R724 0(R)
VDD5
C285
R725 0
+5V
0.1UF
28 27
C1+ V+
C270
0.1UF(K%) 24 3
C1- V-
C307
1
C2+
C306 0.1UF(K%)
0.1UF(K%) 2
C2-
SOUTA 14 9
T1IN T1OUT
RTSA# 13 10
T2IN T2OUT
DTRA 12 11
T3IN T3OUT
COM1RI
20
R2OUTB
DSRA#
19 4
R1OUT R1IN
RIA#
18 5
RIA#
R2OUT R2IN
CTSA#
17 6
R3OUT R3IN
SINA
16 7
SINA
R4OUT R4IN
DCDA#
15 8
R5OUT R5IN
23
FORCEON
R267 100K(R) 22
/FORCEOFF
25
GND
R268 100K 21
T /INVALID
U16
MAX3243
PD[0..7]
22 PD[0..7]
RN3 BK32164S471
PD1
4 5
3 6
PD2
2 7
PD3
1 8
PD4
4 5
PD5
3 6
PD6
2 7
PD7
1 8
PINIT# RN2 BK32164S471
22 PINIT#
CP6
8P4C-180P
CP1
8P4C-180P
PD0
RN1 BK32164S471
PACK#
4 5
22 PACK#
PBUSY
3 6
22 PBUSY
PPE
2 7
22 PPE
PSLCT
1 8
22 PSLCT
PSTB#
4 5
22 PSTB#
PATFD# 3 6
22 PATFD#
2 7
PPERR# 1 8
22 PPERR#
PSLIN#
22 PSLIN#
RN4 BK32164S471
C269
0.1UF(K%)
JCOM1
RN49
12
1 8 5
2 7 9
3 6 4
4 5 8
3
7
FCA3216K4-221 2
6
1
13
RN48
1 8 COM1_DB9
2 7
3 6
4 5
FCA3216K4-221
CP3 CP2
8P4C-120P 8P4C-120P
CP5
8P4C-180P
CP4 C2
8P4C-180P 180P
R1 FCM1608K221
VDD3
R285
100K
PME#
PME# 19,22,24,25
D
D22 Q1
COM1RI
A C G S 2N7002
1SS355
R286
100K
+5V
RP2
PSTB#
1 10
1 10
PATFD# PSLIN#
2 9
2 9
PD0 PD3
3 8
PD1 3 8 PD2
4 7
4 7 PINIT#
5 6
5 6
10P8R-4.7K
R2 2K PPERR#
+5V
RP1
PACK#
1 10
1 10
PBUSY PD7
2 9
2 9
PPE PD6
3 8
PSLCT 3 8 PD5
4 7
4 7 PD4
5 6
5 6
10P8R-4.7K
JPRT1
29
1
14
2
15
3
16
4
17
5
18
6
19
7
20
8
21
9
22
10
23
11
24
12
25
13
28
PRT_PORT