Service manual
Schematic Diagrams
Socket 478 - 2 of 2 (71-M1900-D02) B - 5
Schematic Diagrams
Socket 478 - 2 of 2
Sheet 3 of 34
Socket 478 - 2 of 2
VCC_CORE
VCC_CORE
VCC_CORE
VCC_CORE
VCCVID
VCC_CORE
VCC_CORE
+3VS
+3VS
+3VS VDD3
INTR(14)
NMI(14)
DEFER# (5)
HTRDY# (5)
BPRI# (5)
INIT# (14)
STPCLK# (14)
CPUPWRGD (5)
CPURST# (5)
CPUSLP# (14)
SMI# (14)
IGNNE# (14)
A20M# (14)
FERR# (14)
BNR# (5)
BREQ0# (5)
DBSY# (5)
DRDY# (5)
HLOCK# (5)
HITM# (5)
HIT# (5)
HCLK-CPU#(4)
HCLK-CPU(4)
BSEL0 (4)
BSEL1 (4)
ADS# (5)
HASTB#0(5)
HDSTBN#0(5)
HDSTBN#1(5)
HDSTBN#2(5)
HDSTBN#3(5)
HDSTBP#0(5)
HDSTBP#1(5)
HDSTBP#2(5)
HDSTBP#3(5)
HBPRM5#(2)
HBPM0#(2)
HBPM1#(2)
HBPRM4#(2)
OS# (23)
H8_SMDATA(22,31)
H8_SMCLK(22,31)
HASTB#1(5)
DBI#[0..3](5)
CPURST#
HCLK_ITP1#
HTCK
ITP_STPWR
HBPRM4#
HBPM0#
HBPM1#
FERR#
BREQ0#
PROCHOT#
CPUPWRGD
THERMTRIP#
A20M#
STPCLK#
CPUSLP#
SMI#
INIT#
IGNNE#
INTR
NMI
CPURST#
HTDO
HTDI
HTRST#
IERR
HCLK-CPU
HCLK-CPU#
HTDI
BPRI#
HITM#
INIT#
STPCLK#
FERR#
HDSTBP#2
ADS#
HTRDY#
DRDY#
DBSY#
INTR
NMI
HASTB#0
DBRESET
CPURST#
THERMDA
BREQ0#
HLOCK#
HDSTBN#0
HDSTBN#1
HDSTBN#2
HDSTBP#1
HASTB#1
CPUPWRGD
CPUSLP#
A20M#
HIT#
BNR#
IERR
HDSTBN#3
HDSTBP#3
HCLK-ITP0#
HCLK-ITP0
CPUGTLVREFB
DBI#0
IGNNE#
PROCHOT#
HTDO
HTRST#
CPUGTLVREFA
HDSTBP#0
HCLK-CPU
HCLK-CPU#
DBI#1
DBI#2
DBI#3
SMI#
THERMTRIP#
THERMDC
HTMS
HTDI
HTCK
DEFER#
HBPRM5#
HTMS
HBPRM5#
HBPM1#
HBPRM4#
HBPM0#
HTDO
HTMS
HTCK
HCLK_ITP1
HTRST#
DBRESET
HTCK
ITP_STPWR
SENSE_VCC
OS#
THERMDC
THERMDA
DBRESET
HCLK-ITP0
HCLK-ITP0#
DBI#[0..3]
C95
47UF
L64
4.7uH_SMD_30%
1 2
L16
4.7uH_SMD_30%
1 2
C510
0.1UF
C113
220PF
C96
1UF
C94
220PF
C460
220PF
CB1
1UF
C119
220PF
C97
47UF
R407 0(R)
C356
0.1UF
C516
0.1UF
C517
0.1UF
C515
0.1UF
C511
0.1UF
C508
0.1UF
C509
0.1UF
R441
62_1%
R412
51_1%
R409
62_1%
R440
62_1%
R469 51
R467
51
R468 51
R442
0(R)
R444 56_1%
R400
51_1%
R408 56_1%
R443 56_1%
R471
56_1%
R484
27.4_1%
R473
75
R399 51_1%
R58 49.9_1%
R60
100_1%
R62
100_1%
R445 56_1%
R448 56_1%
R406
56_1%
R434
56_1%
RP20 4P2R-0(R)
1
23
4
R450 10K
R411 680
R410
150
R433 51.1_1%
R447
51.1_1%
R61
49.9_1%
T
T
T
T
T
T
T
T
R483
0
RP78 4P2R-0(R)
1
2 3
4
T
T
JITP1
ITP(R)
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
12
34
56
78
910
11 12
13 14
15 16
17 18
19 20
21 22
23 24
25 26
R470 51
R446
40.2_1%
T
T
T
R464 10K(R)
R465 10K(0805)
R466 200
C99 0.1UF
1 2
U17
TC1066
15
12
14
6
10
1
5
9
13
16
2
3
4
11
7
8
STBY#
SMBDATA
SMBCLK
ADD1
ADD0
NC/CRIT1
NC/CRIT0
NC/OS#
NC
NC
VCC
DXP
DXN
ALERT#
GND
GND
C98
22P
R401 150
R490
2.2K
R491
2.2K
R481
4.7K
R480
4.7K
R482 10K
R463 0
R479
4.7K
R472 1.5K
R56 51_1%
R57 51_1%
JCPU1B
NORTHWOOD478
AC1
V5
A5
AC26
AD26
AE25
L5
R5
P1
E5
D1
F6
F20
AA6
AA21
W23
P23
J23
F21
W22
R22
K22
E22
AF23
AF22
AC3
V6
B6
Y4
AA3
W5
AB2
H5
H2
J6
G1
G4
H6
G2
F3
E3
D2
E2
D4
C1
F7
E6
D5
B3
C4
A2
C3
B2
B5
C6
AB26
AB23
AB25
A4
V21
P26
G25
E21
C25
C5
C7
C9
D10
D12
D14
D16
D18
D20
D21
D24
D3
D6
D8
AE23
AD20
AD22
K24
K3
K6
L1
L23
L26
L4
M2
M22
M25
M5
N21
N24
N3
N6
P2
P22
P25
P5
E13
E15
E17
E19
E23
E26
E4
E7
E9
F10
F12
F14
F16
F18
F2
F22
F25
F5
J2
J22
J25
J5
K21
R1
R23
T6
U2
U22
U25
U5
V1
V23
V26
V4
W21
W24
W3
W6
Y2
Y22
Y25
Y5
G6
R26
E11
E1
F8
G21
G24
T3
T24
T21
G3 R4
AF3
AD6
AD5
L24
AF4
C22
AP0
AP1
VCC_SENSE
ITP_CLK0
ITP_CLK1
DBRESET
ADSTB0
ADSTB1
COMP1
LINT1
LINT0
GTLREF3
GTLREF2
GTLREF1
GTLREF0
STBP3
STBP2
STBP1
STBP0
STBN3
STBN2
STBN1
STBN0
BCLK1
BCLK0
IERR
MCERR
FERR
STPCLK
BINIT
INIT
RSP
DBSY
DRDY
TRDY
ADS
LOCK
BR0
BNR
HIT
HITM
BPRI
DEFER
TCK
TDI
TMS
TRST
TDO
THERMDA
THERMDC
THERMTRIP
PROCHOT
IGNNE
SMI
A20M
SLP
PWRGOOD
RESET
VSS_SENSE
DB#3
DB#2
DB#1
DB#0
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VCCIOPLL
VCCA
VSSA
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS
VSS VSS
VCCVIDPRG
BSEL0
BSEL1
COMP0
VCCVID
VSS
T
T
PRDY#
PREQ#
ITP/TAP TERMINATION
CLOSE TO ITP PORT
CPU SIGNAL TERMINALION
CLOSE TO CPU
CLOSE TO CPU
ITP/TAP TERMINATION
DBA#
20
mils
20 mils