Service manual
Schematic Diagrams
B-31
Schematic Diags
I/O, FDD, LED & Debug
Sheet 30 of 42
I/O, FDD, LED &
Debug
VCC5
VCC5
VDD3
VDD3
VCC5S
VA
VDD3
VIN
VCC5S
VCC5
VCC5VCC5
3VH8
VDD5
C1+
C1-
C2+
V-
C2-
SOUTA COMP3
RTSA# COMP7
DTRA# COMP4
COM1RI
DSRA# COMP6
RIA# COMP9
CTSA# COMP8
SINA COMP2
DCDA# COMP1
Z461
COMP3
DCD1#
COMP6
RI1#
COMP7 RTS1#
SIN1
COMP9
COMP4
COMP8
COMP2
SOUT1
COMP1
DSR1#
SOUT1
RI1#
DCD1#
DTR1#
RTS1#
DSR1#
CTS1#
DTR1#
SIN1
CTS1#
MTR0#
3MODE#
INDEX#
TRK0#
WGATE#
DRV0#
HDSEL#
DISKCHG#
WDATA#
WRPRT#
DIR#
STEP#
RDATA#
COM1RI
LID_SW#
PWRS
WEB0#
WEB1#
WEB2#
SCROLLOCK
NUMLOCK
CAPSLOCK
HD_LED
AD6
AD2
IRDY#
AD1AD0
C/BE#3
AD13
AD14 AD15
AD9
AD3
AD5
AD11
PCIRST#
AD8
TRDY#
AD10
AD4
C/BE#0 PCLK_80P
C/BE#1
C/BE#2 FRAME#
AD7
AD12
BOOT_FLASH
LEDCLK
80CLK 80DATA
LEDAT/WATCH
PWRSW#
80PORT_DET#
MD1
E-MAIL
PWR/SUS_LED
WL_LED
CHA/BATLOW
BAT_FULL
SCROLLOCK
CAPSLOCK
NUMLOCK
164_RESET#
LEDAT/WATCH
LEDCLK
VIN
R370
100K
R369
100K
L89 BK2125HS121
C541
4.7U
L73
BK2125HS121
U2
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
C418
0.1U(K%)
C438
0.1U(K%)
R382 100K
RN66
BK32164S121
1
2
3
4
8
7
6
5
R365 0(0805)(R)
R364 BK2125HS121
C5
180P
C4
180P
C6
180P
C8
180P
C7
180P
C416
0.1U
C437
0.1U(K%)
C417
0.1U(K%)
C4090.1U
T179
T195
R37 10K
RN65
BK32164S121
1
2
3
4
8
7
6
5
C1
180P
C2
180P
C3
180P
CN6
CONNECTOR DB9
5
9
4
8
3
7
2
6
1
11
10
CN5
FDD CON.
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
Q16
2N7002
G
S D
R348 10K
R687
330K
R688
100K
T181
C41010U/10V(0805)
C516
0.1U
U7
74HCT164
1
2
8
9
3
4
5
6
10
11
12
13
147
A
B
CLK
CLR
QA
QB
QC
QD
QE
QF
QG
QH
VCCGND
C549
0.1U
C524
0.1U(0805)
T1
R38 100K
Q20
2N7002
G
S D
J1
CON15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R368
100K
D3 F01J2E
AC
T
T T
P1
DEBUG-P80
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
CN3
H8 DEBUG PORT
SPUFZ-10A-0
1 2
3 4
5 6
7 8
9 10
T532
T531
D1 F01J2E
AC
D2 F01J2E
AC
SOUTA[29]
RTSA#[29]
DTRA#[29]
DSRA#[29]
RIA#[29]
CTSA#[29]
SINA[29]
DCDA#[29]
PME# [19,29,31,33,35,36]
MTR0#[29]
INDEX#[29]
TRK0#[29]
HDSEL#[29]
WRPRT#[29]
DRV0#[29]
DIR#[29]
STEP#[29]
WGATE#[29]
WDATA#[29]
DISKCHG#[29]
RDATA#[29]
3MODE#[29]
ACIN# [31]
PWRS[37,42]
HD_LED[23]
LID_SW#[18,31]
WEB0#[31]
WEB1#[31]
WEB2#[31]
PCIRST# [6,11,19,23,29,31,32,33]
FRAME# [17,19,22,33,35,36]
TRDY# [17,19,22,33,35,36]
IRDY# [17,19,22,33,35,36]
C/BE#[0..3][17,19,22,33,35,36]
PCLK_80P [5]
AD[0..31][17,19,22,33,35,36]
BOOT_FLASH [31,32]
80DATA [31]
80PORT_DET#[31]
MD1[31] LEDAT/WATCH [31,32]
LEDCLK[31] PWRSW# [31,37]
80CLK[31]
164_RESET#[32]
LEDCLK[31]
LEDAT/WATCH[31,32]
E-MAIL [18]
PWR/SUS_LED [18]
CHA/BATLOW [18]
WL_LED [18]
BAT_FULL [18]
Hot keys,Power
switch,key,Lid
Debug Port