McIntosh C2600 Service Manual

27 28
27 28
AUDIO 751899 SCH 1 of 6
4
47.5k
R77
360
R79
47.5k
R78
D23
D22
249
R93
3
1
2
Q16
110
R88
3
1
2
Q15
110
R87
3
1
2
Q12
3
1
2
Q11
10
R112
10
R111
1000µF
C89
3
1
2
Q17
1000µF
C88
3
1
2
Q25
3
1
2
Q33
240
R128
240
R127
1
4
6
7
8
2
3
5
B+
B-
U8
3
1
2
Q8
681
R99
681
R100
3
1
2
Q7
249
R94
1000µF
C91
1000µF
C217
3
1
2
Q34
10
R114
220pF
C66
3
1
2
Q21
3
1
2
Q29
10
R113
220pF
C67
240
R126
240
R125
-7.5V
+7.5V
+7.5V
-7.5V
-7.5V
+7.5V
221k
R141
221k
R142
1000pF
C94
1000pF
C95
1000pF
C93
1000pF
C92
3
1
2
Q19
3
1
2
Q23
3
1
2
Q27
3
1
2
Q31
3
1
2
Q35
3
1
2
Q30
3
1
2
Q26
3
1
2
Q22
3
1
2
Q18
3
1
2
Q36
3
1
2
Q32
3
1
2
Q28
3
1
2
Q24
3
1
2
Q20
D24
D21
M M
M C
MC R
MC L
MM L
MM R
2k
R107
4.75k
R130
4.75k
R129
1µF
C126
1µF
C125
1000pF
C109
221k
R122
221k
R121
2k
R108
1000pF
C108
1000pF
C110
1000pF
C111
1
TOP
3 5
J14:1
MC 1
MC 2 MC 3
RMMG ND
2k
R109
2k
R110
2
BOTT
4 6
J14:2
1
TOP
3
5
J13:1
2
BOTT
4 6
J13:2
MM 1
Q 3
7
VSS
8
Q 1
5
A1
2
A2
3
Q 4
9
Q 5
10
Q 7
12
SDA
15
SCL
14
Q 2
6
A0
1
Q 0
4
Q 6
11
VDD
16
N C
13
U10
MC 1
MC 2
MC 3
MC 4
4.75k
R103
4.75k
R97
4.75k
R91
4.75k
R85
.1µF
C116
+7.5V
47.5k
R86
47.5k
R92
47.5k
R98
47.5k
R106
-7.5V
I2C C
L
2
I2C DA 2
51.1
R82
51.1
R81
3
1
2
Q4
3
1
2
Q3
MC 4
+7.5V+7.5V+7.5V
+3.3V BU
-7.5V -7.5V -7.5V
A = 1 1 1 (7)
MM 2
MM 3
MM 4
+3.3V BU
1k
R105
1
4
6
7
8
2
3
5
B+
B-
U7
-7.5V
+7.5V
3
1
2
Q2
47pF
C69
3
1
2
Q6
100pF
C71
RMMG ND
3
1
2
Q10
100pF
C73
RMMG ND
3
1
2
Q14
100pF
C79
RMMG ND
100pF
C75
100pF
C81
100pF
C77
100pF
C83
3
1
2
Q1
47pF
C68
3
1
2
Q5
100pF
C70
3
1
2
Q9
100pF
C72
100pF
C74
3
1
2
Q13
100pF
C76
100pF
C78
100pF
C80
100pF
C82
1k
R104
100µF
C134
100µF
C117
A GND
IN OUT(TAB)
ADJ
1
23
U9
IN(TAB) OUT
ADJ
1
2 3
U13
475
R135
475
R146
4.75k
R131
4.75k
R140
+7.5V -7.5V-15V+15V
A GND
.1µF
C124
.1µF
C112
10µF
C115
10µF
C133
4.75k
R132
4.75k
R143
1k
R83
1k
R84
1k
R89
1k
R90
1k
R95
1k
R96
1k
R101
1k
R102
NetTie2
NetTie1
360
R80
L1
L2
J32:1
J32:2
M C
Jx:2
Jx:1
GNDJx:2
Jx:1
x
x
MC IN
T U B E P C B
+ x x d B
J122:1
J122:2
M C
Jx:2
Jx:1
.1µF
C127
.1µF
C129
+7.5V -7.5V
.1µF
C128
.1µF
C131
+7.5V -7.5V
10k
R253
10k
R254
10k
R255
10k
R256
10k
R257
10k
R258
10k
R259
10k
R260
47.5k
R261
47.5k
R262
47.5k
R263
47.5k
R264
-7.5V -7.5V -7.5V -7.5V
J123:1
J123:2
M M
Jx:2
Jx:1
T U B E P C B + x x d B
J124:1
J124:2
M M
Jx:2
Jx:1
1000µF
C215
1000µF
C216
1000µF
C194
1000µF
C218
J28:4
J28:3
J28:2
J28:1
J28:5
J28:6
J28:7
J28:11
J28:10
J28:9
J28:12
J28:8
1µF
C104
1µF
C105
R
L
R
L
31
2
10k
10k
Q203
MM 4
+7.5V
MM 3
3
1
2
10k
10k
Q202
+7.5V
31
2
10k
10k
Q201
+7.5V
31
2
10k
10k
Q200
+7.5V
MM 1 MM 2
L3
L4

McIntosh C2600 Specifications

General

Signal to Noise Ratio	100dB
Phono Stage	Yes
Digital USB Input	1
Digital MCT Input	1
Vacuum Tube	Yes
Type	Tube Preamplifier
Frequency Response	20Hz - 20kHz (+0, -0.5dB)
Phono Inputs	1 Moving Magnet 1 Moving Coil
Outputs	3 Total
Output Impedance	100 ohms
Dimensions	17.5" (44.45cm) x 6" (15.24cm) x 18" (45.72cm)
Headphone Output	1/4" High Drive with Headphone Crossfeed Director (HXD®)