Serial Port Com1 - Acer 390 Series Service Manual

PNF
+5V
C106
U2B
1 4 4
SCD1U R197
5 6 1
3 3MODE#
33R3
7 SSABT125
+5V
U40A
1 4 SSHCT32
FDD5VON# 1
3
RZ14
1 2 2
+5V
10KR3 MTR0#
14
7
DZ4
PBUSY 2 1 RY2
1
+5V
S1N4148
D12 100KR3
1 2
+5V
S1N4148
1 4
R233
XNOCON 1 2 13
1MR3
C273
7
SC1U25V5MY
14,23 PPD[0..7]
14 PSTROB#
14 PAUTOFD#
14 PERROR#
14 PINIT#
PSLCTIN#
14
14 PACK#
PBUSY
14 PBUSY
14 PPE
14 PSLCT
C230 C4 C5 C6
SC180P SC180P SC180P SC180P
+5V +5V
R236
1 2 1
23 EXT_FDD_SMI#
R235
100R3 10KR3
2
2 P3_MODE XNOCON
3 FDD/PRT#
+5V
U47C +5V
U47D
1 4
TSHCT08
1 4
9 TSHCT08
8 12
10 11
13
14 MTR1#
7
RY3 7
2 1 2
+5V
100KR3
+5V
U8F U8A
1 4
12 1 2 NOCON
SSHCT14 7 SSHCT14
+5V +5V
U8E
1 4 1 4 1
FDD/PRT# 11 10 PNF 2
7 SSHCT14 7
PNF
PPD4 1
2
PPD5
PPD6 3
PPD7 4
PRT+5V 5
R5
PBUSY 1 2
1KR3
PPD0
PPD1
PPD2
PPD3
R198 PPD4
1 2
+5v
PPD5
4K7R3 P3_MODE
PPD6
PNOCON
PPD7
PFDD/PRT#
FDD+5V
C7 C225 C12 C224 C13 C229 C228
SC180P SC180P SC180P SC180P SC180P SC180P SC180P
1
R78
10KR3

Serial Port COM1

2 R196
1 2 PNOCON
100R3 CN3
10
R195 5
1 2 PFDD/PRT# 9
4
100R3 8
3
7
2
6
1
11
GPI9
3
RS232-9-4-D
Wide GND line
NOCON 3
+5V +5V CX1
1
R11 SCD1U
10KR3 U13
U2A 1 OUT 8
GND
2 2 OUT 7
IN
R10 3 OUT 6
IN
3 FDD5VON# 1 2 4 OUT 5
EN#
100KR3 TPS2013D
SSABT125
ST10U16VBM
+5V
1
D2
S1N4148
RP1
10 PRT+5V 2
9
PPD3
8 PPD2
7 PPD1
6 PPD0 PRT+5V
SRP4K7
C227 C226 C8 C9 C10 C11
SC180P SC180P SC180P SC180P SC180P SC180P
C14 C19
C15 C16 C17 C18
SC680P SC680P SC680P SC680P SC680P SC680P
FDD+5V
1
R205
1 100KR3 C222
SCD1U
C223
2 2
Title
Size Document Number
A3
Date:
RP2
PAUTOFD# 1 10 PRT+5V
2 9
PERROR# PSTROB#
PINIT# 3 8 PACK#
PSLCTIN# 4 7 PPE
5 6 PSLCT
SRP1K
CN2
26
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
27
PRNT25-4-D
PRI1# 14
PDTR1# 14
PCTS1# 14
PSOUT1# 14
PRTS1# 14
PSIN1 14
PDSR1#
14
PDCD1# 14
C220 C221
SC680P SC680P
ACER TAIPEI TAIWAN R.O.C
PARALLEL & SERIAL PORT
390 ACERNOTE LIGHT
REV
96183 SD
August 5, 1997 Sheet 15 of 23