Service manual
Schematic Diagrams
MCH Host (71-P2970-002A) B - 7
B.Schematic Diagrams
MCH Host
Sheet 6 of 28
MCH Host
GMCHVTT
GMCHVTT
+3V
HDSWING
HGTLREF
HD#0
HD#1
HD#2
HD#3
HD#4
HD#5
HD#6
HD#7
HD#8
HD#9
HD#10
HD#11
HD#12
HD#13
HD#14
HD#15
HD#16
HD#17
HD#18
HD#19
HD#20
HD#21
HD#22
HD#23
HD#24
HD#25
HD#26
HD#27
HD#28
HD#29
HD#30
HD#31
HD#32
HD#33
HD#34
HD#35
HD#36
HD#37
HD#38
HD#39
HD#40
HD#41
HD#42
HD#43
HD#44
HD#45
HD#46
HD#47
HD#48
HD#49
HD#50
HD#51
HD#52
HD#53
HD#54
HD#55
HD#56
HD#57
HD#58
HD#59
HD#60
HD#61
HD#62
HD#63
HD#[0..63]
HA#31
HA#30
HA#29
HA#28
HA#27
HA#26
HA#25
HA#24
HA#23
HA#22
HA#21
HA#20
HA#19
HA#18
HA#17
HA#16
HA#15
HA#14
HA#13
HA#12
HA#11
HA#10
HA#9
HA#8
HA#7
HA#6
HA#5
HA#4
HA#3
HA#[3..31]
Z0601
HGTLREF
HDSWING
GMCH-PWROK
GMCH-PWROK
C235
0.1u
CA202
0.1u
C66
0.01u_R
R66
102_1%
R70
301_1%
C54
0.01u
R63 20_1%
U27
74AHC1G08(SC-88A)
2
1
4
3
5
R69 200_1%
SPRINGDALE-GMCH HOST INTERFACE
U2B
SPRINGDALE-G
D26
D30
L23
E29
B32
K23
C30
C31
J25
B31
E30
B33
J24
F25
D34
C32
F28
C34
J27
G27
F29
E28
H27
K24
E32
F31
G30
J26
G26
B29
J23
L22
C29
J21
F27
B28
B26
B24
E8
E27
L21
K21
E23
E25
D24
G24
C17
L17
L14
C15
G22
C27
B27
C7
B7
C25
F23
AE14
E24
B23
E22
B21
D20
B22
D22
B20
C21
E18
E20
B16
D16
B18
B17
E16
D18
G20
F17
E19
F19
J17
L18
G16
G18
F21
F15
E15
E21
J19
G14
E17
K17
J15
L16
J13
F13
F11
E13
K15
G12
G10
L15
E11
K13
J11
H10
G8
E9
B13
E14
B14
B12
B15
D14
C13
B11
D10
C11
E10
B10
C9
B9
D8
B8
B30
D28
B19
L19
G9
D12
C19
K19
F9
E12
L20
L13
L12
HA3#
HA4#
HA5#
HA6#
HA7#
HA8#
HA9#
HA10#
HA11#
HA12#
HA13#
HA14#
HA15#
HA16#
HA17#
HA18#
HA19#
HA20#
HA21#
HA22#
HA23#
HA24#
HA25#
HA26#
HA27#
HA28#
HA29#
HA30#
HA31#
HREQ0#
HREQ1#
HREQ2#
HREQ3#
HREQ4#
ADS#
BNR#
BPRI#
BREQ0#
CPURST#
DBSY#
DEFER#
HIT#
HITM#
HLOCK#
HTRDY#
DRDY#
DINV0#
DINV1#
DINV2#
DINV3#
RS0#
RS1#
RS2#
HCLKN
HCLKP
HDSWING
HDVREF
PWROK
HDRCOMP
HD0#
HD1#
HD2#
HD3#
HD4#
HD5#
HD6#
HD7#
HD8#
HD9#
HD10#
HD11#
HD12#
HD13#
HD14#
HD15#
HD16#
HD17#
HD18#
HD19#
HD20#
HD21#
HD22#
HD23#
HD24#
HD25#
HD26#
HD27#
HD28#
HD29#
HD30#
HD31#
HD32#
HD33#
HD34#
HD35#
HD36#
HD37#
HD38#
HD39#
HD40#
HD41#
HD42#
HD43#
HD44#
HD45#
HD46#
HD47#
HD48#
HD49#
HD50#
HD51#
HD52#
HD53#
HD54#
HD55#
HD56#
HD57#
HD58#
HD59#
HD60#
HD61#
HD62#
HD63#
HADSTB0#
HADSTB1#
HDSTBP0#
HDSTBP1#
HDSTBP2#
HDSTBP3#
HDSTBN0#
HDSTBN1#
HDSTBN2#
HDSTBN3#
PROCHOT#
BESL0
BSEL1
V_CORE [2,3,4,14,22,27]
HGTLREF [3]
HD#[0..63][3]
HA#[3..31][3]
BPRI#[3]
HIT#[3]
ADS#[3]
RS#0[3]
DBSY#[3]
DRDY#[3]
BR0#[3]
HLOCK#[3]
RS#1[3]
RS#2[3]
DEFER#[3]
HTRDY#[3]
HITM#[3]
BNR#[3]
CPURST#[3]
HREQ#0 [3]
HREQ#1 [3]
HREQ#2 [3]
HREQ#3 [3]
HREQ#4 [3]
HADSTB#1 [3]
HADSTB#0 [3]
MCHCLK [4]
MCHCLK# [4]
HDSTBN#0 [3]
HDSTBP#0 [3]
HDB#0 [3]
HDSTBP#1 [3]
HDSTBN#1 [3]
HDB#1 [3]
HDSTBP#2 [3]
HDSTBN#2 [3]
HDB#2 [3]
HDSTBP#3 [3]
HDSTBN#3 [3]
HDB#3 [3]
PROCHOT# [3]
BSEL1 [4]
BSEL0 [4]
GMCHVTT [5,28]
SUSB#[3,14,22]
PWROK[12,14,28]
3.5 inches max
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