McIntosh MA7000 Service Manual page 10

3 MAIN
750856 SCH 3 of 5
L PRE
J16:2
7
R PRE
J16:1
7
C27
R42 R44
22uF
10k 10k
+15V
6
-
C31
100uF
7
U13B
5
+
R46
-15V
LEFT OUTPUT 2
UNBAL TO BAL AM P
+15V -15V
C28 C30
C26 R41 R43
22uF 10k 10k
+15V
2
-
C29
100uF
1
U13A
3
+
-15V
R45
RIGHT OUTPUT 2
UNBAL TO BAL AMP
BAL R
J17:1
6A
DVD R
BAL L
J17:11
6A
DVD L
GND
J17:3
6A
BAL R
J18:1
6B
CD1 R
BAL L
J18:11
6B
CD1 L
GND
J18:3
6B
15
OUT2 RLY REC OUT RLY OUT1 RLY
K1 K2 K3 K4 K5 K6 K7 K8
D15 D16
+5V +5V +5V
R54 R56B R56A R59B R59A
R48 R50 R52
R47 R49 R53 R55
R51 R57 R58 R60
C32 C33 C34 C35 C36 C37 C38 C39
R AMP
J21F J21E J21D J21C J21B
R L
J19 J20
R L R L R
2 REC 1 PWR AM P
OUTPUTS
C42 C44 C46 C48 C50 C52
R62B R62A R64B R64A R66B R66A
DVD RLY CD1 RLY PHONO RLY
K11 K13 K15 K17 K19 K21
+5V +5V +5V
TUN RLY REC RLY SRV RLY CD2 RLY
K9 K10 K12 K14 K16 K18 K20 K22
+5V +5V +5V +5V
R61B R61A R63B R63A R65B R65A R67B R67A
C40 C41 C43 C45 C47 C49 C51 C53
L AMP
J21A J22H J22G J22F J22E J22D J22C J22B J22A
L R L R L R L R L
TUNER REC SERVER CD2
INPUTS
+15V
6
-
C74
R88
47uF
22.1
7
U16B
C56
R78
10uF
1k C60
5
+
-15V
R69 R72
RIGHT R86
C61 INPUT BUFFER
+15V -15V
C70 C73
+15V
2
-
C75
R89
47uF
22.1
1
U16A
C57 R79
10uF
1k C62
3
+
-15V
C63
R70 R73 LEFT R87
INPUT BUFFER
C68 C71
.01uF .033uF
R80 R82
7.5k.5% 89.8k.5%
R74
RIGHT
-15PH
C58
PHONO AMP
2
-
R84
6
PHONO R
U15
47.5
C64
3
+
2.21
+15V
+15PH
R90
R75
C65
C69 C72
.01uF .033uF
2.21
-15V
R81 R83
7.5k.5% 89.8k.5% R91
R76
LEFT
-15PH
C59
PHONO AMP
2
-
47.5
6
C66 PHONO L
U14
R85
3
+
+15PH
C67
R77
R68 R71
C54
C55
GP1
J23B J23A
R L
PHONO
16
R INP
7
J16:5
GND
7
J16:6
L INP
7
J16:8
GND
7
J16:7
+15V
+15V 7
J16:4
-15V
-15V 7
J16:3
+15V
6A
+15V
J17:5
N/C
6A
J17:6
-15V
6A
-15V
J17:7
N/C
6A
J17:8
GND
6A
J17:9
+15PH
C76
+15V
6B
-15PH +15V
J18:5
C77
N/C
6B
J18:6
-15V
6B
-15V
J18:7
N/C
6B
J18:8
GND
6B
J18:9