Service manual
1
2
3
4
5
B
C
B – 8
Diagrams
B
443BX_443ZX
REV. 2
(DIAGRAM 2 OF 2)
FIG. B  7
+3V
+3VS
+3V
+3VS
VCCT
+V_GT LREF
+3V
+3V +3V
+3V
+5V
+3V
+3V
+V_AGPREF
+3V
+3V
AGP_AD[0..31]9
AD[0..31] 14,24,25
AGP_C/BE#[0..3]9
FRAME# 14,16,24,25
IRDY # 1 4, 16, 24,2 5
T R DY # 14, 16, 24, 25
DEVSEL# 14,16,24,25
PAR 14,24,25
ST O P# 14, 16, 24, 25
SERR# 14,16,24
PLO CK# 16
AGP_FRAME#9
AGP_IRDY #9
AGP_T RDY #9
AGP_DEVSEL#9
AGP_PAR9
AGP_ST O P#9
PHOLDA# 14,16
PHOLD# 14,16
REQ0# 15,16,24
GNT0# 16,24
REQ1# 15,16,25
REQ2# 15,16
REQ3# 16
GNT1# 16,25
GNT3# 16
GNT2# 16
PCIRST # 14,24,25
PCLK_BX 13
CLKRUN# 14,16,18,24
AGP_SBA[0..7]9
RBF #9
AGP_REQ#9
AGP_GNT #9
AGP_PIPE#9
SB_ST B9
AD_ST B09
AD_ST B19
AGP_CLK9
PCI_VREF14
AGP_PAR 9
C/BE0# 14,24,25
C/BE1# 14,24,25
C/BE2# 14,24,25
C/BE3# 14,24,25
AGP_ST [0..2]9
G_SUS-ST AT 1#3,9
RSMRST # 15
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
AD16
AD17
AD18
AD19
AD20
AD21
AD22
AD23
AD24
AD25
AD26
AD27
AD28
AD29
AD30
AD31
C/BE0#
C/BE1#
C/BE2#
C/BE3#
FRAME#
IRDY #
T RDY #
DEVSEL#
PAR
ST O P#
SERR#
PLO CK#
PHOLD#
PHLDA#
PCIRST #
CLKRUN#
PCLK_BX
REQ0#
REQ1#
REQ2#
REQ3#
GNT0#
GNT1#
GNT2#
GNT3#
AGP_AD0
AGP_AD1
AGP_AD2
AGP_AD3
AGP_AD4
AGP_AD5
AGP_AD6
AGP_AD7
AGP_AD8
AGP_AD9
AGP_AD10
AGP_AD11
AGP_AD12
AGP_AD13
AGP_AD14
AGP_AD15
AGP_AD16
AGP_AD17
AGP_AD18
AGP_AD19
AGP_AD20
AGP_AD21
AGP_AD22
AGP_AD23
AGP_AD24
AGP_AD25
AGP_AD26
AGP_AD27
AGP_AD28
AGP_AD29
AGP_AD30
AGP_AD31
AGP_C/BE#0
AGP_C/BE#1
AGP_C/BE#2
AGP_C/BE#3
AGP_FRAME#
AGP_IRDY #
AGP_T RDY #
AGP_DEVSEL#
AGP_PAR
AGP_ST O P#
AGP_SBA0
AGP_SBA1
AGP_SBA2
AGP_SBA3
AGP_SBA4
AGP_SBA5
AGP_SBA6
AGP_SBA7
AGP_ST 0
AGP_ST 1
AGP_ST 2
AGP_REQ#
AGP_GNT #
RBF #
AGP_PIPE#
AGP_CLK
AD_ST B0
AD_ST B1
SB_ST B
GNT4#
AGP_PAR
AD_ST B0
AD_ST B1
AGP_FRAME#
SB_ST B
AGP_IRDY #
AGP_DEVSEL#
AGP_T RDY #
AGP_ST O P#
AGP_GNT #
RBF #
AGP_REQ#
AGP_PIPE#
+V_AGPREF
BXPWROK
+V_AGPREF
AGP INTERFACE
PCI INTERFACE
U32C
443BX/443ZX
AB5
AE2
AD3
AD2
AD1
AC3
AC1
AB4
AB1
AA5
AA3
AA4
AA2
AA1
Y5
Y3
W1
V2
W2
U5
V1
U4
U3
U1
T3
T4
T2
T1
U6
R3
R4
R2
AB2
Y4
V4
U2
W3
V5
W4
W5
Y2
Y1
K1
M2
M1
N2
P2
P4
P3
R1
L5
L3
M4
M3
AC2
T5
N3
L4
L2
L1
N5
P5
K6
K2
K4
K3
K5
J1
J2
H2
H1
J5
H3
H5
H4
G1
G2
G4
D1
D3
D2
C1
A2
C3
B3
D4
E5
A4
D5
B4
B5
A5
E6
C6
J4
G3
E4
C4
E2
E1
F5
F3
G5
F4
F1
F2
B6
D6
AE3
A6
C7
F10
D8
D10
E7
D7
E10
E8
E9
A3
AC4
B2
G_AD0
G_AD1
G_AD2
G_AD3
G_AD4
G_AD5
G_AD6
G_AD7
G_AD8
G_AD9
G_AD10
G_AD11
G_AD12
G_AD13
G_AD14
G_AD15
G_AD16
G_AD17
G_AD18
G_AD19
G_AD20
G_AD21
G_AD22
G_AD23
G_AD24
G_AD25
G_AD26
G_AD27
G_AD28
G_AD29
G_AD30
G_AD31
G_C/BE0#
G_C/BE1#
G_C/BE2#
G_C/BE3#
G_FRAME#
G _IRDY #
G_T RDY #
G_DEVSEL#
G_PAR
G_ST O P#
SBA0
SBA1
SBA2
SBA3
SBA4
SBA5
SBA6
SBA7
G_REQ#
G_GNT #
RBF #
PIPE#
AD_ST BA
AD_ST BB
SB_ST B
ST 0
ST 1
ST 2
GCLKIN
GCLKO
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
AD16
AD17
AD18
AD19
AD20
AD21
AD22
AD23
AD24
AD25
AD26
AD27
AD28
AD29
AD30
AD31
C/BE0#
C/BE1#
C/BE2#
C/BE3#
FRAME#
IRDY #
T RDY #
DEVSEL#
PAR
ST O P#
SERR#
PLO CK#
PHOLD#
PHLDA#
WSC#
PREQ#0
PREQ#1
PREQ#2
PREQ#3
PREQ#4
PGNT #0
PGNT #1
PGNT #2
PGNT #3
PGNT #4
PCIRST #
CLKRUN#
PCLKIN
R78
18
R3110
R870
R2910
R75
18
R310
10K
R276
1K
R68 10K
R67
*10K
R252 8.2K
R307
100K
R268 8.2K
R257 8.2K
R247 8.2K
R260 8.2K
R248 8.2K
R262 8.2K
R261 8.2K
R244 8.2K
R240 8.2K
R269 8.2K
R263 8.2K
T57
PAD
C401
.1UF
C99
0.0 1UF
C457
0.0 1UF
C98
0.0 1UF
C101
0.0 1UF
C368
.1UF
C86
.1UF
C109
.1UF
C114
.1UF
C447
1UF /16V
C95
.1UF
C96
.1UF
T54
T35
T34
T52
R274
10
C383
10PF
D24
RB 751V
12
C374
10UF/16V
C119
10UF/16V
C85
10UF/16V
C97
10UF/16V
C458
10UF/16V
C88
10UF/16V
C373
10UF/16V
C456
10UF/16V
C118
10UF/16V
C117
10UF/16V
C94
10UF/16V
POWER AND GROUND
U32D
443BX/443ZX
B1
F7
F9
F18
F20
G6
G21
J6
J21
L11
L13
L14
L16
M12
M15
N11
N16
N22
N26
P1
P11
P16
R12
R15
T11
T13
T14
T16
V6
V21
Y6
Y21
AA7
AA9
AA18
AA20
AE1
AE26
AF2
AF14
M23
E16
C2
N4
P22
AE22
AE23
M25
AD4
AF3
A1
A14
A26
C5
C9
C18
C22
E3
E12
E15
E24
F6
F8
F19
F21
H6
H21
J3
J24
L12
L15
M5
M11
M13
M14
M16
M22
N1
N12
N13
N14
N15
N24
P12
P13
P14
P15
P26
R5
R11
R13
R14
R16
R22
T12
T15
V3
V24
W6
W2 1
AA6
AA8
AA19
AA21
AB3
AB12
AB15
AB24
AB25
AD5
AD9
AD18
AD22
AF1
AF13
AF26
M24
F17
VCC1
VCC2
VCC3
VCC4
VCC5
VCC6
VCC7
VCC8
VCC9
VCC10
VCC11
VCC12
VCC13
VCC14
VCC15
VCC16
VCC17
VCC18
VCC19
VCC20
VCC21
VCC22
VCC23
VCC24
VCC25
VCC26
VCC27
VCC28
VCC29
VCC30
VCC31
VCC32
VCC33
VCC34
VCC35
VCC36
VCC37
VCC38
VCC39
VCC40
GTL_REFA
GTL_REFB
REF VCC5_PCI
AGPREF
NC0
NC1
NC2
T EST IN#
SUSTAT #
BXPWROK
VSS1
VSS2
VSS3
VSS4
VSS5
VSS6
VSS7
VSS8
VSS9
VSS10
VSS11
VSS12
VSS13
VSS14
VSS15
VSS16
VSS17
VSS18
VSS19
VSS20
VSS21
VSS22
VSS23
VSS24
VSS25
VSS26
VSS27
VSS28
VSS29
VSS30
VSS31
VSS32
VSS33
VSS34
VSS35
VSS36
VSS37
VSS38
VSS39
VSS40
VSS41
VSS42
VSS43
VSS44
VSS45
VSS46
VSS47
VSS48
VSS49
VSS50
VSS51
VSS52
VSS53
VSS54
VSS55
VSS56
VSS57
VSS58
VSS59
VSS60
VSS61
VSS62
VSS63
VSS64
VSS65
VSS66
VT TA
VT TB
U37A
74LV C1 4
1 2
14
7
U37B
74LV C1 4
3 4
14
7
U37E
74LV C1 4
11 10
14
7
R369
22K
C503
.1UF
U37D
74LV C1 4
9 8
14
7
U37F
74LV C1 4
13 12
14
7
R119 100K
R120 0
AGP CLK:
The length from GCLKO to AGP VGA
must equal to
GCLKO to GCLKIN
SIDEBAN D
ADDRESS
READ BUFFER FULL
chipset