McIntosh MHT200, Service Manual

Page: 8 / 60

13 14
DISPLAY
320167 SH 2 OF 4
2A
KEYBOARD
2B
R39
47k
R40
47k
R42
47k
R43
47k
R44
47k
R46
47k
R63
47k
R64
47k
R67
47k
R68
47k
R70
47k
R71
47k
R84
47k
R79
47k
R37
47k
R38
47k
R75
47k
R78
47k
R77
47k
R76
47k
R32
47k
R36
47k
R29
47k
R33
47k
R35
47k
R34
47k
R74
47k
R72
47k
-29V
-29V
FilamentVoltage
Fil1 Fil2
IdentDataOut IdentClk
-Interrupt
-reset
SlotSelect
SerialClk
MISO
MOSI
Mic+
IRdata
In1
Out1
Out2
Out3
D
14
A
11
SER
10
B
12
C
13
CLK inh
15
SH/DL
1
CLK
2
E
3
F
4
G
5
H
6
Qh
7
Qh
9
VCC
16
GND
8
IC1
74HC165
-reset
IdentClk
C1
100n
IdentDataOut
Slot Identification circuit
+5D
+5D
Slot + power + HP connector
Standard Slot Circuits:
R14
4k7 R12
4k7 R10
4k7 R6
4k7 R3
4k7
+5D
+5D
C2
100uF
+5D
R5
4k7
R15
10k
Scope hooks, power for prototyping etc.
1
2
X2
X2P1M
Not Installed
1
2 X13
X2P1M
Not Installed
+5D
1
2
X7
X2P1M
Not Installed
+5D
1
2
X11
X2P1M
Not Installed
1
2
X8
X2P1M
Not Installed
LatchIn
SPI_OUT_E
ClearInt
LatchOut
MOSI
Vcc
16
GND
8
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
A0
1
A1
2
A2
3
E1
4
E2
5
E3
6
IC4
74HC138
C21
100n
TP4
+5D
Out3
Out2
Out1
Generating Strobes
+5D
+5D
C28
100n
-VFD_POR
SerialClk
3
2
1
VCC
14
GND
7
IC8A
74HC02
5
6
4
IC8B
74HC02
8
10
9
IC8C
74HC02
+5D
+5D
C31
100n
-VFD_POR
R47
10R
C30
22u 25V
+4.9V
D1
33
D2
34
D3
35
D4
36
D5
37
D6
38
VEE
39
D7
40
D8
41
D9
42
D10
43
D11
44
D12
1
LED1
2
LED2
3
LED3
4
LED4
5
LED5
6
VSS
7
VEE
8
SEGP
9
SEGO
10
SEGN
11
SEGM
12
SEGL
13
SEGK
14
SEGJ
15
SEGI
16
VEE
17
SEGH
18
SEGG
19
SEGF
20
SEGE
21
SEGD
22
SEGC
23
SEGB
24
SEGA
25
SCLK
26
DATA IN
27
LOAD
28
OSCI
29
OSCO
30
/POR
31
VDD
32
IC9
MSC7112-01
DS6 DS5 DS2 DS1 DS3 DS4 DS8 DS10 DS7 DS9
Light bulbs
Bulb1
Bulb2
-29V
11
12
13
IC8D
74HC02
VFD_Load
VFD_Load
-VFD_data_En
-VFD_data_En
Bulb1 Bulb2 Fil1 Fil2
+15A
-15A
JackSw
+12V
HP_R
HP_L
MH3 MH1 MH2 MH4
Mounting holes
MH5 MH6
MH1 MH2 MH5
R101
0R R102
0R R103
0R
1
3
2
REC1
Temic TSOP1738
C15
100uF
R26
330R
C23
100n
R27
22k
+5D_2
+5D_2
IR receiver
S1d
S2d
S3d
S4d
S5d
S6d
S7d
Cd
L1d
L2d
L3d
IRdatad
IRdatad
+5D_2
On the snap-off board
S1
SLS121RA (T&B)
R31
NOT INSTALLED
Optional S1 / R31
IRdata
S1u
S2u
S3u
S4u
S5u
S6u
S7u
Cu
L1u
L2u
L3u
+5D
3 4
5 6
7 8
9 10
11 12
14
13
1 2
15 16
18
17
19
20
21
23
25 22
24
26
27 28
29 30
31 32
33 34
35 36
37 38
39 40
X1
X40P2M
R111
0R
MH6
HP_R
HP_Ld
HP_L
HP_Rd
JackSw
JackSwd
-29V
Mic+d
Mic+
C62
CAP:47PF:0805
NP0:5%:50V
R112
RES:47K:0805:1%:0W1
3 4
5 6
7 8
9 10
11 12
14
13
1 2
15 16
18
17
19
20
21
23
25 22
24
26
X5
X26P2M
3 4
5 6
7 8
9
10
11 12
14
13
1 2
15 16
18
17
19
20
21
23
25 22
24
26
X6
X26P2M
MH7
MOUNTING HOLE
MH8
MOUNTING HOLE
MH9
MOUNTING HOLE
MH10
MOUNTING HOLE
MH11
MOUNTING HOLE
MH12
MOUNTING HOLE
MH13
MOUNTING HOLE
F
1
Pk
2
Pi
3
Pl
4
Pn
5
Pm
6
Pj
7
Pc
8
Pd
9
G12
10
G11
11
G10
12
G9
13
G8
14
G7
15
G6
16
G5
17
G4
18
G3
19
G2
20
G1
21
Pcom
22
Pdp
23
Pe
24
Ph
25
Pg
26
Pf
27
Pb
28
Pa
29
F
30
VF DISPLAY
DISP1
NORITAKE16
McIntosh
LOGO1
MCINTOSH_LOGO
+15A_2
-15A_2
-15A
+15A
R147
RES:100R:0805:5%
C70
CAP:10NF:0805:X7R:20%:50V
Needed in "Trim off",
see MHT2FV1_trim_off.txt
SUPP1