McIntosh MC302 Service Manual

11 12
MAIN 751291 SCH 2 OF 3
2
10k
R43
150k
R53
D32
3
1
2
Q16
.22µF
C29
1µF
C31
100
R57
L METER LOG AMP
200k
R46
L METER DRIVER
3
1
2
Q14
3
1
2
Q18
+14VML+14VML
4
75k
R59
6
5
7
U8:2
22.1k
R51
D28
D30
D16
D17
D26
2
3
1
8
4
B+
B-
U10:1
+14VML
-5VML
10k
R44
D33
3
1
2
Q17
.22µF
C30
1µF
C32
100
R58
R METER LOG AMP
R METER DRIVER
3
1
2
Q15
3
1
2
Q19
+14VMR+14VMR
4
75k
R61
D29
D31
D20
D21
D27
6
5
7
U9:2
220µF
C19
+14VML
.1µF
C23
+15V
220µF
C20
1k
R36
-5VML
.1µF
C24
-15V
22.1k
R52
12
T2
10
R41
1000µF
C27
33.2k
R45
2
3
1
84
B+
B-
U8:1
D14
D15
D22
+14VML
-5VML
18.2k
R49
D24
10
R42
1000µF
C28
33.2k
R47
2
3
1
8
4
B+
B-
U9:1
D18
D19
D23
+14VMR
-5VMR
18.2k
R50
D25
100k
13
2
CCW
R56
150k
R54
100k
1 3
2
CCW
R55
21
3
G
D
S
Q21
1M
R69
2
1
3
G
D
S
Q20
6
5
7
U10:2
Main - Meter
2
6
5
7
U11:2
2
3
1
84
B+
B-
U11:1
+14VMR
-5VMR
0.1 1 W
R39
12
T3
0.1 1W
R40
220µF
C21
+14VMR
.1µF
C25
+15V
220µF
C22
1k
R38
-5VMR
.1µF
C26
-15V
HOLD R
12.1k
R60
1M
R70
200k
R48
-5VML
-5VMR
1
2
.1k
R62
-5VML
-5VMR
200k
R63
1.5k
R66
3.32k
R65
200k
R64
1.5k
R68
3.32k
R67
1
FUNC 1
FUNC 2
J29:1
1
FUNC 1
FUNC 2
J29:2
1
FUNC 1
FUNC 2
J30:1
1
FUNC 1
FUNC 2
J30:2
1
FUNC 1
FUNC 2
J31:1
1
FUNC 1
FUNC 2
J31:2
1
FUNC 1
FUNC 2
J32:1
1
FUNC 1
FUNC 2
J32:2
R METERL METER
L MET
R MET
D12
D13
L MET V
R MET V
475k
R71
MUTE
HOLD L
3
1
2
Q22
475K
R72
-5VML
4
7
5
k
R73
MUTE
3
1
2
Q23
475K
R74
-5VMR
1000pF
C33
1000pF
C34
10µF
C36
10µF
C35
220
R37
220
R35
0V
0V
0V
0V
0V
0V
-5V
-5V
0V
-5V
0V
0V
0V
0V
-5V
-5V
0V
-5V
0V
0V
-5V
-5V
-18V
-20V
0V
0V

McIntosh MC302 Specifications

General

Damping factor	40
Amplifier class	-
Frequency range	10 - 100000 Hz
RMS rated power	600 W
Audio output channels	2.0 channels
Peak power per channel	300 W
Signal-to-Noise Ratio (SNR)	122 dB
Total Harmonic Distortion (THD)	0.005 %
XLR in	Yes
Speakers connectivity type	Binding post
Product color	Black
Connectivity technology	Wired
Maximum current	6.6 A
AC input voltage	110 V
AC input frequency	50 - 60 Hz

Weight and Dimensions

Depth	558.8 mm
Width	444.5 mm
Height	239.7 mm
Weight	44450 g