McIntosh MC1.2KW Service Manual

MC1.2KW
13
14
DRIVER 750760 SCH
4
12V
11V
-11V
THERM
AMP
AMP
DRIVE
DRIVE
PWR
THERM
THERM
THERM
POWER
POWER
OUT
POWER
GND GND
POWER
OUT
POWER
365
R41
8 OHM
33.2k
R108
33.2k
R107
CONTROL IN
J6:9
CONTROL
150k
R59
150k
R39
J6:8
-12V
GUARD
INPUT +
SENSOR
SENSOR
SENSOR
J1:1
J2:2
TURN ON
.1uF
C10
22.1k
R101
2.21k
R105
470pF
C9
AMP
DIFF.
CURRENT
AMP
100pF
C8
SOURCE
CURRENT
470pF
C2
SOURCE
CURRENT
100pF
C5
DIFF.
AMP
VOLTAGE
VOLTAGE
VOLTAGE
VOLTAGE
47 .5 W
R27
FEEDBACK B
2 OHM
METER V-
DRIVE
FEEDBACK B
+DRIVE B
-DRIVE A
8 OHM
2 OHM
FEEDBACK A
FEEDBACK A
-72V
J6:6
J6:4
J6:5
J6:1
J7:4
INPUT -
J7:7
J7:8
J4:2
J3:1
SENSOR
J6:3
.1uF
C1
100
R100
100
R5
.47uF
C21
2
1
3
S
G
D
Q7
2
1
3
S
G
D
Q10
1.5k
R35
2.21M
R34
2.21k
R103
CONTROL
10uF
C12
22.1k
R32
100
R62
2
1
3
S
G
D
Q8
2
1
3
S
G
D
Q11
100k
R78
3
1
2
Q37
475
R154
POWER
CONTROL
CONTROL IN
1.8pF
C43
475k
R33
1k
R60
470pF
C27
806
R57
470pF
C28
1k
R4
2
1
3
Q68
324
R67
SOURCE
100pF
C6
3 1
2
Q20
470pF
C3
1k
R2
3.32k
R75
470pF
C4
1k
R3
DIFF.
806
R30
3
2
1
Q64
1k
R1
806
R64
324
R47
SOURCE
CURRENT
100pF
C7
3
2
1
Q18
806
R91
DIFF.
324
R46
3 1
2
Q23
220uF
C41
267
R56
365
R71
3
21
Q56
5.36k.5%
R38
AMP
2 10W
R118
221
R49
.01uF
C37
.15uF
C35
AMP
365
R88
221
R31
.01uF
C36
.15uF
C34
AMP
10uF
C14
RIGHT
-DRIVE B
FEEDBACK B
10
R157
10
R158
FEEDBACK A
METER V+
DRIVE
+DRIVE A
10
R156
J7:5
J7:6
1.5k
R37
33.2k
R104
3
1
2
Q78
J6:7
3 1
2
Q38
CONTROL
J7:3
3
1
2
Q39
475k
R55
J7:1
2 1
3
Q21
324
R42
324
R44
3.32k
R72
3
21
Q14
3 1
2
Q16
267
R54
31
2
Q17
3
21
Q55
2 1 0W
R117
10uF
C16
10
R155
J7:2
POWER GUARD
J9:3
FEEDBACK B
6.49k .5%
R51
J1:3
J3:4
10uF
C11
2
3
1
-
+
84
B+
B-
U1:1
3 1
2
Q66
4.75k
R58
2.21M
R40
221
R153
10uF
C19
31
2
Q36
3 1
2
Q1
3.32k
R69
2 1
3
Q72
47.5k
R63
324
R48
2
1
3
Q15
31
2
Q19
681k
R70
3
2
1
Q75
3
21
Q63
100k
R79
324
R43
3.32k
R53
.022uF
C39
1
2
3
4
LDR1
2
1
3
Q62
2 1
3
Q61
3 1
2
Q22
3
1
2
Q13
681k
R68
3
2
1
Q60
324
R45
J2:4
J1:4
J9:2
.15uF
C32
5.36k.5%
R50
J6:10
2 1
3
Q41
J2:3
J1:6
J4:4
J9:1
.15uF
C33
FEEDBACK A
J9:4
J6:11
2 1
3
Q42
J4:3
J3:3
J3:6
J3:2
47 .5 W
R74
J3:7
47uF
C15
31
2
Q67
33.2k
R106
221
R152
47.5k
R61
J1:5
2 1 0W
R114
31
2
Q12
2 10W
R116
365
R93
J3:5
6.49k .5%
R36
6
5
7
-
+
U1:2
TURN/ON
TURN/ON
TURN/ON
-12V -12V
-72VR
-72VR
-72VR
-72VR
-72VR
-72VR
-72VR
-72VR
-72VR
-72VR
11V 11V 11V
-72VR
-72VR
72VR
72VR
72VR
-12V
12V 11V
-11V
11V
11V
MONO/B
72VR
72VR
72VR
72VR
72VR
-72VR
72VR
72VR
-11V
-11V
11V
72VR
J7:10
J6:2
METER LIGHT
CONTROL
METER LIGHT
CONTROL
3B
7
5
J1-10
J1-1
7
3B
J1-9
J1-3
2B
3A
J1-7
J1-3
2A
J1-7
5J1-3
5J1-4
5J1-5
5J1-6
5J1-7
7J1-11
7J1-8
GND
7J1-7
7J1-6
-.1V
-.1V
-.1V
-.1V
-19V-19V
-18V
16V
16V
16V
16V
-12V
11V
11V
11V
7
7
7
5
5
5
J1-5 J1-4
J1-3
J1-8
J1-9
J1-10
0V
0V
0V
0V
0V
-70.3V
.6V
.6V
0V
-70.3V
-70.3V
-69.7V
-70.3V
-1.74V
-1.74V
J1-4
J1-4
T2
T2
J1-2
J1-3
J1-2
J1-5
J1-2
J1-4
J1-3
J1-1
T2
T2
J1-1
J1-2
J1-6
J1-2
J1-5
J1-1
2B
2B
1
1
7
3B
2B
2B
2A
3A
1
1
7
2A
3A
2A
2A
2A
2A
72V
GND
72V
1.74V
-1.74V
1.74V
GND
70.3V
70.3V
70.3V
0V
-.7V
-.6V
-.6V
69.7V
70.3V
1.74V
71V
70.4V
-71V
0V
.6V
.7V .6V
0V
-70.3V
-70.3V
-70.3V
-69.7V
-1.74V
-70.3V
0V
0V
0V
71V
.7V
70.4V
70.3V
70.3V
0V
-.6V
-70.4V
-71V
-.6V
-.7V
69.7V
70.3V
1.74V
70.3V
0V
70.4V

McIntosh MC1.2KW Specifications

General

Damping factor	100
Amplifier class	-
Frequency range	10 - 100000 Hz
Output impedance	8 Ω
Audio output channels	1.0 channels
Peak power per channel	1200 W
Signal-to-Noise Ratio (SNR)	124 dB
Total Harmonic Distortion (THD)	0.005 %
Speakers connectivity type	Binding post
Purpose	Performance/stage
Product color	Black, Silver
Connectivity technology	Wired
LED indicators	Yes

Weight and Dimensions

Depth	558.8 mm
Width	450.9 mm
Height	312.7 mm
Weight	66700 g