McIntosh MHT200, Service Manual

Page: 33 / 60

MAIN AUDIO
320165 SH 3 OF 7
10
63 64
MHT200
MrSClk
+5D
SERIN
14
SRCLK
11
SRCLR
10
RCLK
12
G
13
Q0
15
Q1
1
Q2
2
Q3
3
Q4
4
Q5
5
Q6
6
Q7
7
SEROUT
9
VCC
16
GND
8
IC42
74HC595
MrMOSI
MrLatchOut
C139
100n
MrMute
Control signal outputs
R113
10k R109
10k
MrSrcSel0
MrSrcSel1
TP7
TP10
R115
10k
R114
10k
R118
10k
+15A
-15A
C154
100n
C159
100n
C161
100n
C162
100n
MrVcMute
R117
10k
C251
10u
C250
10u
MrSrcSel2
R116
10k
+5D
+5D
1G
1
1A1
2
1Y1
18
1A2
4
1Y2
16
1A3
6
1Y3
14
1A4
8
1Y4
12
VCC
20
GND
10
2A1
17
2Y1
3
2A2
15
2Y2
5
2A3
13
2Y3
7
2A4
11
2Y4
9
2G
19
IC4
74HC244
-slot_select4
C138
100n
+5D
Sck
MOSI
Out1
Out2
Slot 4 (multiroom/zone)
MrSClk
MrMOSI
MrLatchOut
MrVolCs
C58
10u
TP6
-15A
+15A
3
2
1
8
4
IC20A
TL072
5
6
7
IC20B
TL072
C283
10p
C285
10p
R243
10R
MrVolCs
MrVcMute
-15A
+15A
MrSClk
MrMOSI
Zone B Volume Controller
MrSrcSel0
MrSrcSel1
R120
10k
R69
100k
R68
100k
C280
22u
C279
22u
MrSrcSel2
C281
220n C282
220n
3
2
1
8
4
IC19A
TL072
5
6
7
IC19B
TL072
R182
0R
R188
0R
VD+
7
DGND
11
AGND
16
VA+
1
LIN
4
LGND
5
RIN
13
RGND
12
XMUTE
8
XCS
6
DATA
9
CCLK
10
RFO
14
RMO
15
LFO
3
LMO
2
IC48
MAS9116
L17
EXC ML
68R/100MHZ 3A
C247
10u
C248
10u
+5Va
+5Va
C151
100n
C143
100n
C142
100n
R119
10k
+15V
1
GND
12
-15V
27
S1a
19
S2a
20
S3a
21
S4a
22
S5a
23
S6a
24
S7a
25
S8a
26
S8b
4
S7b
5
S6b
6
S5b
7
S4b
8
S3b
9
S2b
10
S1b
11
A0
17
A1
16
A2
15
En
18
Da
28
Db
2
n.c.
3
n.c.
13
n.c.
14
IC23
DG407
+15A -15A
AInL1
AInL2
AInL3
AInL4
AInL7
AInL8
AInL5
AInL6
AInR1
AInR2
AInR3
AInR4
AInR7
AInR8
AInR5
AInR6
+15A
Zone B Source select
ZoneB_R
ZoneB_L
VCR2_R
VCR2_L
PowerTransON ** Nothing to do with Multiroom/Zone,
main power transformer is ON when +5V**
R46
10k
The colors on the Kunming jacks were turned around,
so that the left input channel is now on the left in the
backpanel.
The easiest way to get the channels right was to cross the
left
NOTE!!!
PRE
10
CLK
11
D
12
CLR
13
Q
9
Q
8
IC14B
74HC74
MrLatchOut
+5D
-reset
R55
10k
V4