Service manual

Schematic Diagrams
B-27
Schematic Diags
Flash ROM/LPT1
Sheet 26 of 39
Flash ROM/LPT1
VCC5
VCC5
VCC5S
VCC3S
VCC5S
VCC5S
VDD3
C_PD4
C_PD7
C_PD0
C_PD1
C_PSTB#
C_PATFD#
PD5
PD7
PD6
PD4
PD1
PD0
C_PD1
C_PATFD#
C_PD4
C_PSTB#
C_PD0
C_PD7
C_PSLIN#
C_PD3
C_PD2
C_PINIT#
PPERR#
PD2
PD3
PSLIN#
PINIT#
PPE
C_PBUSY
C_PPE
C_PSLCT
C_PSLIN#
C_PD2
C_PD3
C_PACK#
C_PINIT#
PSLCT
C_PBUSY
C_PPE
PACK#
C_PSLCT
C_PACK#PBUSY
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#
DTR1#
CTS1#
PD5
PD4
PD3
PD2
PPERR#
PSLCT
PPE
PD7
PD0
PSTB#
PBUSY
PACK#
PD1
PD6
PINIT#
PSLIN#
PATFD#
SD0
SD1
SD2
SD3
SD4
SD5
SD6
SD7
MEMW#
SA1
SA3
SA16
SA2
SA0
SA15
SA14
SA12
SA13
SA18
FLASH#
SA4
SA5
SA6
SA7
SA8
SA9
SA10
SA11
SA17BIOSCS#
MEMR#
WBIOS#
SOUT1
RI1#
DCD1#
DTR1#
RTS1#
DSR1#
CTS1#
SIN1
COM1RI
PATFD#
PSTB#
C_PD6 C_PD5
C_PD6C_PD5
C407
180P
C405
180P
C406
180P
C412
180P
C411
180P
C410
180P
C408
180P
C409
180P
CN5
COM1_DB9
5
9
4
8
3
7
2
6
1
12
13
U18
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
C70
0.1U(K%)
T250
RN93 BK32164S121
1
2
3
4
8
7
6
5
C68
0.1U(K%)
C96
0.1U(K%)
R63 100K
RN94 BK32164S121
1
2
3
4
8
7
6
5
C69
0.1U
C95
0.1U(K%)
D20
1SS355
A C R1 2.7K
C310
0.1U
CP3
8P4C-180P
1 8 2 7 3 6 4 5
RN2 8P4R-32164S471
1
2
3
4
8
7
6
5
R268
10K
RN4 8P4R-32164S471
1
2
3
4
8
7
6
5
RN1 8P4R-2.7K
1
2
3
4
8
7
6
5
RN5 8P4R-2.7K
1
2
3
4
8
7
6
5
R267
1K
C401
180P
CP2
8P4C-180P
1 8 2 7 3 6 4 5
C311
0.1U
CP4
8P4C-180P
18 27 36 45
CP1
8P4C-180P
18 27 36 45
R2
BK1608HS601
C403
0.1U
CN3
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
U31
29F020
12
11
10
9
8
7
6
5
27
26
23
25
4
28
29
3
2
22
24
1
31
13
14
15
17
18
19
20
21
32
16
30
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
CE
OE
VPP
PGM
O0
O1
O2
O3
O4
O5
O6
O7
VCC
GND
A17
C402
4.7U(0805)
RN8 8P4R-2.7K
1
2
3
4
8
7
6
5
RN3 8P4R-2.7K
1
2
3
4
8
7
6
5
RN7 8P4R-32164S471
1
2
3
4
8
7
6
5
U10
TC7S32F
1
2
3
5
4
IN
IN
GND
VCC
OUT
RN6 8P4R-32164S471
1
2
3
4
8
7
6
5
R62 10K
Q3
2N7002(R)
G
S D
R84 100K
PSTB#[25]
PD7[25]
PATFD#[25]
PD6[25]
PD5[25]
PD4[25]
PD1[25]
PD0[25]
PPERR#[25]
PPE[25]
PACK#[25]
PSLIN#[25]
PINIT#[25]
PD3[25]
PD2[25]
PSLCT[25]
PBUSY[25]
SOUTA[25]
RTSA#[25]
DTRA#[25]
DSRA#[25]
RIA#[25]
CTSA#[25]
SINA[25]
DCDA#[25]
PD4 [25]
PSLCT [25]
PD1 [25]
PD6 [25]
PBUSY [25]
PSTB# [25]
PD2 [25]
PINIT# [25]
PD3 [25]
PPERR# [25]
PD5 [25]
PPE [25]
PD0 [25]
PD7 [25]
PACK# [25]
PATFD# [25]
PSLIN# [25]
SD0 [25]
SD1 [25]
SD2 [25]
SD3 [25]
SD4 [25]
SD5 [25]
SD6 [25]
SD7 [25]
SA0[25]
SA1[25]
SA2[25]
SA3[25]
SA12[25]
SA13[25]
SA14[25]
SA15[25]
SA16[25]
SA18[25]
BIOSCS#[25]
MEMR#[25]
FLASH#[25]
MEMW#[25]
SA4[25]
SA5[25]
SA6[25]
SA7[25]
SA8[25]
SA9[25]
SA10[25]
SA11[25]
SA17 [25]
PME# [18,25,27,28,29,30,31]
LPT1
FLASH ROM
COM PORT