McIntosh MTI100 - Page 18

AUDIO 752184 SCH 8 of 8
3
31 32
47.5k
R49
47.5k
R51
10µF
C44
180V
180V
180V
+12V
+12V
L V O L IN
R VOL IN
L V O L OUT
R VOL O UT
-15V IN
+15V IN
R PRE
L PRE
2
3
1
8
4
B
+
B
-
U4:1
6
5
7
U4:2
1k
R45
1k
R70
L TUBE PREAMPLIFIER
R TUBE PRE A MPLIFIER
2
3
1
8
4
B+
B-
U8:1
6
5
7
U8:2
3
1
2
Q1
4
2
1
3
Vcc
GND
5
U6
4.75k
R61
4.75k
R66
.47µF
C52
.47µF
C54
+15V
-15V
3.32k
R68
2.21M
R63
100pF
C53
D8
D7
DG N DD G ND
A U D IO D E T
.1µF
C46
.1µF
C47
+15V IN-15V IN
2
3
1
8
4
B+
B-
U9:1
6
5
7
U9:2
.1µF
C56
.1µF
C57
+15V IN-15V IN
2
3
1
8
4
B+
B-
U7:1
6
5
7
U7:2
-15V IN
+15V IN
22.1k
R57
22.1k
R69
20.0k
R62
20.0k
R64
20.0k
R73
10k
R72
10k
R74
+15V IN
-15V IN
.1µF
C58
.1µF
C59
+15V IN-15V IN
22µF
C60
SUB OUTPUT
23
14
K3
22µF
C61
22.1k
R75
22.1k
R76
23
14
K4
23
14
K5
A U D IO D E TE CT OR
D9
D10
D11
22µF
C51
22µF
C62
22µF
C63
22µF
C55
22.1k
R77
22.1k
R78
L V O L IN
R VO L IN
L V O L OUTR VO L OUT
V O L SCL
V O L SDA
-5V CC +5V CC
4.75k
R58
4.75k
R59
-5V CC +5V CC
.1µF
C48
.1µF
C49
.1µF
C50
3
1
2
Q3
3
1
2
Q2
3
1
2
Q4
2.21k
R80
2.21k
R79
2.21k
R81
AMP PRE
A MP PRE
AMP PRE
2
3
1
L
R
J2:1
1
2
J5
R MAIN LSUB MON O OU T
V O L UME CO N T RO L
SEL A
SEL B
SEL C
FR-IR
PS ON
A U D IO D E T
AMP CTRL
V O L SCL
V O L SDA
PS ON
+3,3 V BU M
PAIRIN G
C O N T R O L
2a
221k
R229
221k
R231
221k
R233
100
R232
100
R230
100
R228
D33
D34
D35
L0
7
H0
8
A0
5
A2
2
A1
3
L1
9
H1
10
C E
12
Vc c
15
SC L
14
W0
6
GN D
1
V-
4
W1
11
VD D
16
SD A
13
U3
1µF
C24
1µF
C42
8
6
7
12AX7A
V1:2
3
2
1
12AX7A
V1:1
5
9
4
12AX7A
V1:3
3
2
1
12AX7A
V2:1
8
6
7
12AX7A
V2:2
5
9
4
12AX7A
V2:3
+5V CC
1µF
C45
1µF
C40
MP2
MP3
1k
R252
1k
R251
+5V CC
+5V CC
2a
2a
2a
2a
2a
2a
2a
2a
2a
2a
2a
2a
2a
2a
2a
+5V CC
+5V CC
+5V CC
PRE IN L
PRE IN R
+190V
DS1
DS2
J9:1
J9:2
J9:3
J9:4
J9:5
J9:6
J9:7
J9:8
J9:9
J9:10
J9:11
J9:12
J9:13
J9:14
J9:15
J9:16
J9:17
J9:18
2a
2a
BLINK BT
47.5k
R41
100k
R17
4.75k
R39
47.5k
R53
4.75k
R50
100k
R46
+3,3 V BU M
0
R42
0
R43
0
R18
0
R38
3.32k
R67
3.32k
R65
100k
R255
+3,3 V BU M
1.5k
R249
1.5k
R256
3k
R27
3k
R25
3k
R260
3k
R259
100k
R60
100k
R71
+3,3 V BUM
+3,3 V BUM+3,3 V BUM
+3,3 V BU M
47.5k
R40
47.5k
R52