McIntosh MA7000 Service Manual page 8

3 MAIN
750856 SCH 1 of 5
R1
BLU
J1 t
1
1.1A
GRN
J2
1
R2
BLU
J3 t
1
1.1A
R3
BRN
J4 t
1
1.1A
ORN
J5
1
POWER RLY
ORN
J6
1
BRN
J7
1
PWR
J8:1
2
RELAY
+VBU
J8:4
2
GND
J8:5
2
11
D3
D5
D6
D4
+5V AC DETECT
D1
R5
1 3 2
Q1
22.1k
1 2
HS1
U1
1 3
IN OUT
D7
D9
D10
D8
1 2
HS2
U2
2 3
IN OUT
+VBU
1 2
HS3
U3
1 3
IN OUT
Q2
+15V
-15V
+5V
12