McIntosh C2600 Service Manual page 8

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2
CONTROL
751898 SCH 2 of 4
R63
2
L10
100
3
1
1
R70
J11:1
22.1k
R57
1
D13
Q5
10
DATA 1
J11:2
R64
5
L11
100
2
6
4
R71
22.1k
R58
1
D14
Q6
10
DATA 2
R65
2
L12
100
3
3
1
R72
J12:1
22.1k
R59
1
D15
Q7
10
DATA 3
J12:2
R66
5
L13
100
4
6
4
R73
22.1k
R60
1
D16
Q8
10
DATA 4
R67
2
L14
100
3
5
1
R74
J13:1
22.1k
1
R61
D17
Q9
10
DATA 5
J13:2
R68
5
L15
100
6
6
4
R75
22.1k
R62
1
D18
Q10
10
DATA
DATA 6
PORTS
EXTERNAL
CONTROL
R69
2
1.5k
IR IN
3
1
J14:1
D19
D22
J14:2
5
RS 232
6
L19
4
L16
L9
EXT TXD
L17
EXT RXD
D20
D21
L18
11
+3.3VBU
U27
1
16
A0
VDD
2
15
A1
SDA
I2C DA
3
14
C62
A2
SCL
I2C CL
.1µF
4
13
DATA 6
Q0
NC
5
12
DATA 5
Q1
Q7
TUBE RED
6
11
DATA 4
Q2
Q6
TUBE GRN
7
10
DATA 3
Q3
Q5
DATA 1
8
9
VSS
Q4
DATA 2
A = 0 0 0 (0)
+3.3VBU
C58
.1µF
+3.3VBU
+3.3VBU
U28
+3.3VBU
1
16
A0
VD D
2
15
A1
SD A
I2C DA
3
14
A2
SC L
I2C CL
4
13
TRG4 PC
Q0
NC
5
12
TRG3 PC
Q1
Q7
MAIN PC
6
11
TRG2 PC
Q2
Q6
7
10
TRG1 PC
Q3
Q5
8
9
VSS
Q4
A = 0 0 1 (1)
+3.3VBU
+3.3VBU
U25
U30
1
CONV IR
Vc c
DAT A OU T
4
1
Vc c
2
4
GN D
2
IR CTR L
GN D
+3.3VBU
C55
.1µF
+3.3VBU
+3.3VBU +3.3VBU
+3.3VBU
+3.3VBU
R76
R78
47.5k
475k
U29
U24
1
6
1
8
+3.3VBU
A
VC C
2
7
B
R/Cex t
2
5
3
6
Cex t
1
CLR
4
5
4
3
Q
GND
2
C61
100pF
+3.3VBU
U26
C56
.1µF
18
1
RS232 SD
SD
EN
17
2
Vcc
C1+
C59
16
3
GND
V+
15
4
FROM EXT DB9 - 3 (T XD )
T1out
C1-
.1µF
14
5
R1in
C2+
13
6
R1out
C2-
C60
TO EXT DB9 - 2 (R XD )
12
7
T1in
V-
11
8
C57
T2in
T2out
.1µF
.1µF
C54
10
9
R2out
R2in
EXT DB9 - 5 (GN D)
.1µF
R79
C63
22.1k
.1µF
+V PC
TRG3 PC
1
Q11
R80
C64
22.1k
.1µF
+V PC
TRG4 PC
1
Q12
R81
C65
22.1k
.1µF
+V PC
TRG1 PC
22.1k
R77
1
+3.3VBU
Q13
U33
1
Vc c
4
MET PC
2
GN D
R82
C66
22.1k
.1µF
+V PC
TRG2 PC
1
Q14
+3.3VBU
U31
1
Vc c
FR IR
4
2
GN D
R83
C67
22.1k
.1µF
+V PC
MAIN PC
1
Q15
U32
Vc c
4
REAR IR
GN D
+3.3V BU
4
PASS LT
GND
RING
+3.3V BU
TIP
4
PASS PC
GN D
GN D
+V PC
1
Q16
+V PC
R84
R94
2.21k
4.75k
1
Q21
R85
3.32k
R103
22.1
+V PC
R108
22.1k
1
1
Q17
+V PC
MET PC
Q26
R86
R95
2.21k
4.75k
1
Q22
R87
3.32k
R104
22.1
+V PC
R109
22.1k
1
1
Q18
Q27
+V PC
R88
R96
2.21k
4.75k
1
Q23
R89
3.32k
R105
22.1
+V PC
R110
22.1k
1
1
Q19
Q28
+V PC
R90
R97
2.21k
4.75k
1
Q24
R91
3.32k
R106
22.1
+V PC
R111
22.1k
1
1
Q20
Q29
+V PC
R92
R98
2.21k
4.75k
1
Q25
R93
3.32k
R107
22.1
+3.3V BU
R112
22.1k
1
Q30
R102
U34
22.1k
R100
1
47.5k
Vcc
2
+3.3VBU
C69
.1µF
+3.3V BU
U35
D23
R99
1
22.1k
Vc c
2
C68
R101
.01µF
22.1k
12
POWER
CONTROL
TRIG 3
J15:1
1
L22
3
2
L23
R113
150
R118
D24
D30
10
T RIG 4
J15:2
4
L24
6
5
R114
L25
150
R119
D25
D31
10
TRIG 1
J16:1
1
L26
3
2
L27
R115
150
R120
D26
D32
10
TRIG 2
J16:2
4
L28
6
5
L29
R116
150
R121
D27
D33
10
M A IN
J17:1
1
L30
3
2
L31
R117
150
R122
D28
D34
10
PASSTHRU
J17:2
4
L20
6
5
L21
R123
D29
D35
10

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