McIntosh MA7000, Service Manual, Page: 8 / 36

11 12
MAIN
750856 SCH 1 of 5
3
1
1
1
BLU
GRN
BLU
1.1A
t
R1
.0
47
uF
C
3
3
1
2
IN OUT
U2
33
00
uF
C
5
2
3 1
IN OUT
U1
.1
uF
C
11
10
0u
F
C
10
.1
uF
C
13
F
R
O
M
P
W
R
T
R
A
N
S
F
O
R
M
E
R
33
00
uF
C
6
10
0u
F
C
9
D8
D9
D7
D10
-15V
+15V
J8:4
J8:5
2
F
R
O
M
B
A
C
K
U
P
P
S
2
+VBU
GND
2
3 1
IN OUT
U3
10
0u
F
C
8
.1
uF
C
12
+5V
33
00
uF
C
4
J8:1
2
PWR
RELAY
POWER RLY
J1
J2
J3
.0
47
uF
C
2
D4
D5
D3
D6
1
1
BRN
BRN
J4
J7
+VBU
1.1A
t
R3
1.1A
t
R2
.4
7u
F
C
1
22
1k
R
4
22.1k
R5
3 1
2
Q1
3
1
2
Q2
D
2
D1
22
1k
R
6
AC DETECT +5V
1
1
ORN
ORN
J5
J6
1 2
HS3
1 2
HS1
1 2
HS2
10
uF
C
7