Service manual
1
2
3
4
5
B
C
B
B – 15
PIIX4
REV. 2
(DIAGRAM 2 OF 2)
FIG. B  14
BIOS & inverter
+3V
+3V
+3V
+3V
+3V
+3V
+3VS
+3VS
+3V
+5VS
+3VS
+3V
+3VS
+3VS
+3VS
IRQ116, 20
IRQ316
IRQ416
IRQ516
IRQ616
IRQ716
IRQ916
IRQ 1016
IRQ 1116
IRQ 1216, 20
IRQ 1416, 17
IRQ 1516, 17
INT A#16, 24
INT B#9,16
INT C#16,25
INT D#16
DA CK 1# 18
DA CK 2# 18
DA CK 3# 18
DA CK 0# 18DREQ016 , 18
DREQ116 , 18
DREQ216 , 18
DREQ316 , 18
DREQ516
DREQ616
DREQ716
TC18
REQA#16
REQB#16
REQC#16
SERIRQ16 , 18,24
PCMSUS#24
PC_BEEP 26
SUSA# 13
SUSB# 3,5,6,9,14,19,20,23
SUSC# 20
CPU_ST P# 3
PCI_STP# 13
PCLK_SMB 4,13
PD A T _S M B 4, 13
14.3M_PX4 13
CLK_48M HZ 13
PC LK _ P I IX4 13
MUT E25
REQ 0# 8,16,24
REQ 1# 8,16,25
REQ 2# 8,16
PIIX4_REQ3# 9
SUS_ST 1# 3,9
BAYST S1#16, 17
IDE1RST17
SCI#20
INHIB 13
BAYST S0#17
SHDPWR17
IDE2RST17
VGASUS#9
EXT SMI# 20
FLASHON#16
CPU_PWRGOO D3,5
WAKE-UP 20
E XT F DDPWR#19
DRAMENA13
DRAMENB13
ST P_AGP#9
PWROK 11
RSMRST # 8
G_LO/HI#3
G _VRCHGNG# 3,20
VGASUSCLK 9
VRM_WP4
CPU_T HERM# 2
PID09,11
PID19,11
PID29,11
SWBKON11
CO NFIG1
CO NFIG2
BID0
BID1
G_VRCHG#
CLK_48M HZ
PID1
BID0
G_VRCHG#
PWROK
PID0
CO NFIG2
MUT E
PCLK_PIIX4
14.3M_PX4
CO NFIG1
PWROK
BID1
GCL
GCL
PID0
PID1
PID2
PID2
R373 22 K
R355 0
R358 0
R366 100K
R368 100K
R359 22K
R360 100K
R361 8.2 K
R391 22K
R141 22K
R354 10K
R140 10K
U38
MAX6306
1
2
3
4
5
RESET #
GND
MR#
RST -IN
VCC
R333
100K
R334 150K
R329
10K
C497
22P
C498
22P
C469
.1UF
D28 1N4148
12
D32
1N4148
1 2
D27
1N4148
1 2
R348
10
C489
10P F
Y3
32.768KHZ
1 4
R357
*1M
T71
T64
T74
T78
T82
T63
L71
BK 1608LL1 21
1 2
RP50
10P 8RX10K
10
9
8
7
6
1
2
3
4
5
R330 *1K
R331 *1K
R367
10K
R356 0
U39B
PIIX4E
U14
W6
Y10
V5
T15
V16
W17
U6
V2
U5
Y16
U16
U17
M1
N2
P3
N1
P2
P4
V10
L3
D11
V11
R20
N19
P17
T7
U19
R1
V20
P16
E10
A11
B11
R2
U20
P18
M17
N17
R19
T20
W20
V19
U18
T17
T18
H19
K16
J17
H18
K18
H20
J20
T9
W9
U8
V8
Y8
U1
Y20
U12
W13
T13
V14
Y14
R3
R4
P5
G1
J19
Y15
T14
W14
U13
V13
Y13
T12
R17
R18
M18
K17
V18
P19
L2
J3
L5
K3
K4
H1
H4
H5
G3
G4
T19
G5
F2
F3
F4
C11
J4
M5
M16
N3
N18
R5
W15
DACK0#
DACK1#
DACK2#
DACK3#
DACK5#
DACK6#
DACK7#
DREQ1
DREQ2
DREQ3
DREQ5
DREQ6
DREQ7
REQA#/GPI2
REQB#/GPI3
REQC#/GPI4
GNT A#/GPO9
GNT B#/GPO10
GNT C#/GPO11
TC
CLK48
PCICLK
OSC
RT CX2
RT CX1
SUSCLK
SYSCLK
BAT LOW#/GPI9
CPU_S T P#/GPO17
EXT SMI#
LID/ G PI10
PCIREQA#
PCIREQB#
PCIREQC#
PCI_ST P#/GPO 18
PWRBTN#
RI#/GPI12
RSMRST #
SMBALERT #/GPI11
SMBCLK
SMBDAT A
SUSA#
GPO15/SUSB#
GPO16/SUSC#
SUS_ST AT 1#/GPO20
SUS_ST AT 2#/GPO21
THRM#/GPI8
ZZ/GPO19
APICACK#/GPO12
APICCS#/GPO13
APICREQ#/GPI5
IRQ0/GPO 14
IRQ1
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
IRQ9
IRQ8/GPI6
IRQ 10
IRQ 11
IRQ12/M
IRQ 14
IRQ 15
PIRQA#
PIRQB#
PIRQC#
PIRQD#
SERIRQ/GPI7
LA1 7/G PO 1
LA1 8/G PO 2
LA1 9/G PO 3
LA2 0/G PO 4
LA2 1/G PO 5
LA2 2/G PO 6
LA2 3/G PO 7
CO NFIG1
CO NFIG2
PWROK
SPKR
TEST#
GPI1
GPI13
GPI14
GPI15
GPI16
GPI17
GPI18
GPI19
GPI20
GPI21
GPO0
GPO8
GPO 27
GPO 28
GPO 29
GPO 30
PCIREQD#
NC
NC
NC
NC
NC
NC
DREQ0
R341
*10K
R343
10K
T206
R411 *0
C534 * .1UF
CLOCK
POWER
MANA.
INTR .
GPI/O
DMA
GND:3.4
PROGRAMABLE
IRQ
PC/PCI DMA REQUEST
PIIX4
BAYSTS1# PULL UP AT PAGE 16
R 3 43 WI T H GEYS ERV ILLE
R 3 41 W/ O GEYS ERVIL LE
CIRCUIT
CIRCUIT
W/O GEYSERVILLE R356
W I TH GEY S ERVILL E R356
DELETE
ADD
W/ O GEY SERVILLE R411
W I TH GEY S ERVILL E R411 DELE TE
ADD