McIntosh MC1.2KW Service Manual

MC1.2KW
21
22
METER POWER SUPPLY 750752 SCH 2 of 2 and PCB
7
TURN ON
5V REG.
GND
2.7 2 W
R69
1000u F
C30
4.7uF
C27
1M
R54
3
1
2
Q18
-12V
12V
1000u F
C31
D28
3
1
2
IN OUT
U7
2
31
IN OUT
U6
2
13
IN OUT
Q21
D32
J16
T1/BRN
J2:5
SUPPLY
J1:6
D30
T1/BRN
J15
J2:2
J2:6
3 1
2
S
G
D
Q19
J1:9
METER
D27
J1:8
.1uF
C26
2.74M
R64
3
1
2
Q15
150k
R70
J1:7
5v
12V
-12V
12V
-20V
10VAC
-6V
10V
-20V
33.2k
R62
D31
OUT
GND
ON
AC SWITCHED
AC COMM.
POWERCONTROL
IN
1M
R59
22.1k
R57
.22uF
C28
22.1k
R55
100
R56
33.2k
R61
4
6
2
1
Q23
1.1k
R60
22uF
C29
POWERCONTROL
T1/YEL/BLK
WIPER
POWER SW
REMOTE
POWER SW
STBY LED
CATHODE
STBY LED
ANODE
J9:7
J1:5
J1:3
J12
J9:4
J9:1
POWER SW
J10:1
J1:4
1
2
3
7
B+
GND
14
U5:1
J10:4
3
2
1
K1
1.5k
R68
4
5
6
U5:2
12
13
11
U5:4
9
10
8
U5:3
5v
12v
SW2
HOLD
LIGHTS
ON
200k
R52
33.2k
R63
681
R58
31
2
Q20
475k
R72
J1:11
J2:4
J2:3
SW2
METER LIGHT SW
PG LED
3
1
2
Q17
WIPER
J8:1
J8:2
J2:1
J8:3
20V
-12V
12V
D29
10uF
C3
20V
3
1
2
Q3
20K
R16
-12V
12.1k
R65
3
1
2
Q4
4.75k
R3
20V
PG
HOLD
JMP1
PANEL LED
D8
J1:10
3 1
2
Q2
-12V
METER LED
METER LIGHT
CONTROL
31
2
Q5
47.5k
R2
7
7
1
1
1
10
1
10
1
1
S1 BLK
J8-4
J8-1
S1 BRN
S1 RED
J6-7
J6-9
POWERCONTROL
0V
0V
0V
0V
0V
20V
-20V
.6V
11V
-19V
11V
-.6V
-.5V
.2V
.8V
.1V
.6V
11V
-12V
-6V
7
7
8
8
1
1
1
8
4
8
8
8
4
4
4
4
J6-6
J6-4
J6-5
J6-3
J1-6
J1-2
J1-5
TURN
ON
GND
J6-2
J1-1
S2 BLK
S2 BRN
S2 RED
J1-3
J1-4
J6-1
J6-8
POWER
CONTROL
OUT
T1
T1
T1
5V
702470
D29
R30
R9
R65
J3
R3
J2
Q5 Q4
R63
D8
R16
R1
R2
Q2
Q3
C3
J10
JMP1
R61
R62
R68
R69
J8
J15
J16
Q1
D4
Q8
C30
D32
Q9
R77
D3
D5
C15
C12
R4
D30
R70
R36
D7
D1
D6
R10
R8
D18
R5
+
T1
J12
J9
R72
Q21
D2
K1
Q23
C29
D31
R60
C26
R56 R57
R52
Q17 Q20
R58
C31
U7
C23
C14
U6
R78
C21
R66
D27
R12
U3
R7
R6
Q18
U2
R76
Q19
R35
C22
C1
R74 R75
R73
J1
R55
C28
R59
RoHS
Rev.A
129860
U5
R54
R64
D14 D28
D22
C27
Q15

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