McIntosh MA7000 Service Manual

MA7000
13 14
MAIN 750856 SCH 2 of 5
3
4
4
4
AC DET
L PG
44
4
4
4
44
4
4
4
4
4
TO DISPLAY
IR MUTE
FP IR
SCLK
DATA
DECODER
INPUT RELAY
MAIN
POW ER
POW ER
EXT
SENSOR
SENSOR
EXTERNAL
GND
GND
+5.6V
FROM DISPLAY
J9:14
R LCLK
J9:6
J9:12
J9:16
J9:10
10uF
C14
DECODER
DATA PORT
CONTROL
DECODER
POW ER
ACC
POW ER
MAIN ACC
1 3 2
J10A
1 2
1 3 2
J11A
20K
R12
CD1
2
1
J12
.1uF
C24
20K
R25
4.7uF
C22
3
1
2
Q7
SERVER CD2
4 6 5
J13B
100
R32
100k
R30
REC DVD
4 6 5
J14B
100
R34
221
R35
DRIVER
1k
R36
TUNER
4 6 5
J15B
100
R38
47 .5 W
R40
D14
EXT IR
+5.6V
R PG
100k
R8
QF
5
QG
6
QD
3
QA
15
QB
1
GND
8
QH
7
SQH
9
OE
13
VCC
16
QC
2
QE
4
LCLK
12
RESET
10
SCLK
11
DATA
14
U7
QF
5
QG
6
QD
3
QA
15
QB
1
GND
8
QH
7
SQH
9
OE
13
VCC
16
QC
2
QE
4
LCLK
12
RESET
10
SCLK
11
DATA
14
U6
QF
5
QG
6
QD
3
QA
15
QB
1
GND
8
QH
7
SQH
9
OE
13
VCC
16
QC
2
QE
4
LCLK
12
RESET
10
SCLK
11
DATA
14
U5
12.1k
R23
3
1
2
Q5
100k
R11
15K
R26
1000pF
C25
100k
R39
POW ER CONTROL
CONTROL
CONTROL
CONTROL
CONTROL
OUTPUT 2
DATA PORTS
4 6 5
J10B
100
R20
6
5
4
U8B
100
R18
100
R19
6
5
4
U11B
100
R15
100
R16
11
13
12
U11D
8
10
9
U11C
OUTPUT 1
100
R13
100
R14
3
2
1
7
B+
GND
14
U4A
6
5
4
U4B
3.32k
R22
3 1
2
G
D
S
Q4
THERM AL PROTECTION
4 6 5
J11B
1 3 2
J13A
1 3 2
J14A
1
3
2
J15A
100
R27
100
R33
100
R37
3
2
1
-
+
84
U12A
4.75k
R10
11
13
12
U4D
J9:4
J9:8
J9:1
J9:2
J9:3
J9:5
J9:11
J9:9
10
127
154
172
9
11
13
14
16
18
8
6
5
3
1
GND
U9
8
10
9
U8C
11
13
12
U8D
6
7
8
9
1
2
3
5
4
14
15
16
17
18
10
11
12
13
GND
U10
100
R17
3
2
1
7
B+
GND
14
U11A
3
2
1
7
B+
GND
14
U8A
12.1k
R24
3.32k
R21
3
1
2
Q6
31
2
Q8
5
6
7
-
+
84
U12B
DATA
DATA
DATA
IR MUTE
IR MUTE
SCLK
SCLK
SCLK
SCLK
+5V
.1uF
C21
+5V
+5V
R THERM
L THERM
TURN ON
CD1 RLY
CD2 RLY
DVD RLY
SRV RLY
REC RLY
PHONO RLY
REC OUT RLY
-15V-15V-15V
+15V
THERM
.1uF
C19
+5V
.1uF
C20
+5V
+5V+15V
+VIR
+VIR
+5V
L PG
R PG
AC DETECT
+5V
.1uF
C17
+5V
.1uF
C16
+5V
.1uF
C18
+VIR
+VIR
L B-
D13
D12
+15V
+VBU
220pF
C15
1k
R7
47.5k
R31
TURN ON M
UTING
TUN RLY
OUT2 RLY
POW ER RLY
OUT1 RLY
+5V
+5V
+5V
8
10
9
U4C
EXT IR
EXT IR
3.32 k
R9
3
1
2
Q3
QG
QF
QD
QC
QA
QH
QG
QE
QD
QB
QA
QH
QE
QB
QF
QC
OUT2 LED
OUT1 LED
ILLUM
PHONO LED
REC LED
SERVER LED
CD2 LED
CD1 LED
FRONT
ACC CTRL
T/O DELAY
OUT2 CTRL
OUT1 CTRL
PW R ON
REC OUT RLY
PHONO RLY
REC RLY
SERVER RLY
CD2 RLY
CD1 RLY
REAR
PG/MET MUTE
MONO LED
TUNER LED
DVD LED
MUTE
TUNER RLY
DVD RLY
HDPH RLY
47.5
R29
220uF
C23
D11
100k
R28
+5V
5V
0V
0V
0V
0V
0V
0V
0V
5V
5V
5V
5V
5V
5V
0V
5V
-18V
5V

McIntosh MA7000 Specifications

General

Amplifier class	-
Frequency range	20 - 20000 Hz
Audio output channels	2.0 channels
Peak power per channel	250 W
Signal-to-Noise Ratio (SNR)	115 dB
Total Harmonic Distortion (THD)	0.005 %
XLR in	Yes
Purpose	Home
Product color	Black
Connectivity technology	Wired
AC input voltage	120 V
AC input frequency	50 - 60 Hz

Weight and Dimensions

Depth	558.8 mm
Width	444.5 mm
Height	239.7 mm
Weight	44300 g