McIntosh C2600 Service Manual

C2600
37 38
AUDIO 751899 SCH 6 of 6
4
MONO
DAC
Q3
7
VSS
8
Q1
5
A1
2
A2
3
Q4
9
Q5
10
Q7
12
SDA
15
SCL
14
Q2
6
A0
1
Q0
4
Q6
11
VDD
16
NC
13
U23
+3 .3V BU
.1µF
C179
+3 .3V BU +3 .3V BU
BAL1BAL2
I2C C L 2
I2C D A 2
UNBAL1
MM MC
Q3
7
VSS
8
Q1
5
A1
2
A2
3
Q4
9
Q5
10
Q7
12
SDA
15
SCL
14
Q2
6
A0
1
Q0
4
Q6
11
VDD
16
NC
13
U20
+3 .3V BU
.1µF
C177
+3 .3V BU
+3 .3V BU
I2C C L 2
I2C D A 2
Q3
7
VSS
8
Q1
5
A1
2
A2
3
Q4
9
Q5
10
Q7
12
SDA
15
SCL
14
Q2
6
A0
1
Q0
4
Q6
11
VDD
16
NC
13
U21
+3 .3V BU
3
1
2
Q51
1k
R207
3
1
2
Q49
3
1
2
Q52
5.62k
R208
1.5k
R204
3
1
2
Q48
22.1k
R215
1.5k
R205
.1µF
C178
+3 .3V BU
I2C C L 2
I2C D A 2
HDPH
OUT 2
MAIN
3
1
2
Q59
5.62k
R218
A = 1 0 1 (5)A = 1 1 0 (6)
+5 V
+5 V
+5 V
+5 V
+5 V
A = 1 0 0 (4)
H X D
BAL3
UNBAL2 UNBAL3
OUT 1
100k
R217
+5 V
4
2
1
3
Vc c
GN D
5
U22
+5 V
3
1
2
Q46
5.62k
R202
+5 V
3
1
2
Q50
5.62k
R206
+5 V
3
1
2
Q47
5.62k
R203
+5 V
3
1
2
Q60
3.32k
R219
3
1
2
Q61
3.32k
R220
3
1
2
Q62
3.32k
R221
3
1
2
Q55
5.62k
R213
3
1
2
Q54
5.62k
R212
3
1
2
Q56
5.62k
R214
+5 V
UNBAL4
+5 V +5 V
3
1
2
Q53
5.62k
R211
+5 V
+5 V
+5 V+5 V
3
1
2
Q57
100k
R252
+5 V
EQ control not used

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®)