A5V
X
1
4.
19
M
H
z
C64
30P
C65
30P
X2
32.768KHz
C66
15P
C67
15P
C
81
47
uF
/1
6V
C82
104P
R87
22K
D6
4148
C
79 10
uF
/1
6V
SC
L
SD
A
M
U
TE
ST
A
N
D
B
Y
TU
N
-O
N
D3
IN60
A0
1
A1
2
A2
3
GND
4
SDA
5
SCL
6
TEST
7
Vdd
8
IC4
24C01
C71
104P
1 2 3 4 5 6
CN7
1 2 3 4
CN9
D5
IN60
REMOTE
R55
68K
R56
4.7K
DS-STB1
DS-DAT
DS-CLK
REMOTE
ROT-A
ROT-B
R46
10K
R45
10K
R42 10K
R43
10K
C47
103P
C48
103P
D
S-S
TB
1
D
S-D
A
T
D
S-C
LK
R
EM
O
TE
1 2 3 4 5
CN5
7P/2.0
A
5V
M
U
TE
ST
A
N
D
B
Y
R
O
T-
B
R
O
T-
A
A5V
SU
R
-M
U
TE
L1
1
L2
2
L3
3
L4
4
FL
-I
N
5
FR
-I
N
6
C
EN
-I
N
7
SW
-I
N
8
SL
-I
N
9
SR
-I
N
10
M
IX
O
11
V
C
C
12
R
EF
13
G
N
D
14
SD
A
15
SC
L
16
SR
-O
U
T
17
SL
-O
U
T
18
SW
-O
U
T
19
C
EN
-O
U
T
20
FR
-O
U
T
21
FL
-O
U
T
22
LP
F-
O
23
LP
F-
I
24
R
4
25
R
3
26
R
2
27
R
1
28
IC1
PT2323
R11
270
R10
270
R9
270
R8
270
R7
270
R6
270
C
16
68
3J
C13
223J
R12
24K
R26
24K
C14
4.7uF/50V
C15
4.7uF/50V
C28
4.7uF/50V
C27
4.7uF/50V
C
4
4.
7u
F/
50
V
C
12
4.
7u
F/
50
V
C
10
4.
7u
F/
50
V
C
9
4.
7u
F/
50
V
C
8
4.
7u
F/
50
V
C
7
4.
7u
F/
50
V
C
6
4.
7u
F/
50
V
C
5
4.
7u
F/
50
V
C1
10uF/25V
C3
100uF/16V
C2
104P
R2
100
R5
20K
R4
20K
C23
4.7uF/50V
C22
4.7uF/50V
C21
4.7uF/50V
C20
4.7uF/50V
C19
4.7uF/50V
C18
4.7uF/50V
1 2 3 4 5 6 7 8 9
CN1
9P/2.0
D
-M
U
TE
A
G
N
D
FL
FR
A
G
N
D
SR
SL
SW
C
EN
TU
N
-L
A
G
N
D
TU
N
-R
TU
N
-V
cc
Q1
9015
R19
10K
R18
1K
Q2
9014
R1
47K
R17
4.7
C25
100uF/16V
C24
104P
R21
10K
R24
10K
R20
33K
R
22
33
K
1 2 3 4 5
CN2
TUN-ON
D
4
41
48
D1
4148
MUTE
A
U
X
1-L
A
U
X
1-R
SCL
SDA
C
PU
5V
C
PU
5V
SU
R
-M
U
TE
1 2 3
CN11
3P/2.0
D
G
N
D
D
V
D
IR
D
V
D
S
TB
D
V
D
C
LK
D
V
D
D
A
TA
PL
L
C
E
PL
L
D
A
TA
PL
L
C
LK
D
G
N
D
L1
10UH
C87
220uF/16V
C89
104P
R64
10K
R
27
6.
8K
R29
6.8K
R28
100K
R30
100K
DVD ON
-28V
V
F2
V
F1
1
2
3
CN13
4P/2.0
R90
H1A 125V
D
V
D
-S
W
R
71
10
0
R
74
10
0
C83
300
C84
300
C86
300
C92
300
C52
223(M)
C53
223(M)
C54
10uF/16V
C55
473(M)
C56
223(M)
RCMID2_FR
1
RCMID1_RF
2
CTRE_FR
3
IN_FR
4
IN_SR
5
IN_SUB
6
VREF
7
GND
8
IN_CT
9
IN_SL
10
IN_FL
11
CTRE_FL
12
RCMID1_FL
13
RCMID3_FL
14
RCBAS1_FL
15
RCBAS2_FL
16
OUT_FL
17
OUT_SL
18
OUT_CT
19
VCC
20
OUT_SUB
21
OUT_SR
22
OUT_FR
23
SCL
24
SDA
25
GND
26
RCBAS2_FR
27
RCBAS1_FR
28
IC2
PT2322
C59
104M
C58
104M
C43
103M
C42
103M
C31
103M
C32
103M
R32
3.3K
R53
6.2K
R50 6.2K
R31
3.3K
R51
20K
R52
20K
C33
222M
C37
10uF/16V
C41
222M
C60
100uF/16V
C61
104P
R54
47
C57
223(M)
C51
104
C50
104
R
68
4.
7k
R
69
10
0
C69
300
SD
A
SC
L
C40
4.7uF/50V
C34
4.7uF/50V
C38
4.7uF/50V
C36
4.7uF/50V
C39
4.7uF/50V
C35
4.7uF/50V
QUAL
1
RDDA
2
VREF
3
MPX
4
OSEL
5
GND
6
ARI
7
FILOUT
8
FSEL
9
TM
10
EXRES
11
Vs
12
OSCIN
13
OSCOUT
14
T57
15
RDCL
16
IC5
PT2579
C78
2.2uF/50V
C100
10uF/16V
C101
104
X3
4.33MHz
C103
47P
C102
82P
C80
561
R88 2K2
R99
4.7K
R
86
10
K
C77
330P
M
PX
MPX
A5V
R76
10K
R77
10K
ST
/M
O
O
PE
N
-S
W
C
LO
SE
-S
W
M-CLOSE
M-OPEN
D
V
D
-S
W
ST
/M
O
CPU5V
R61
4.7K
CPU5V
R65
10K
R66
10K
CPU5V
R98
2.2K
R97
2.2K
R93
1K
R94
1K
Q7
8050
Q8
8050
1 2 3 4 5
CN12
5P/2.0
Q6
8550
Q5
8550
O
PE
N
-S
W
C
LO
SE
-S
W
M1+
M1-
D
G
N
D
R95
2.2k
R96
2.2k
C97
470p
C110
470p
+5V
M
-C
LO
SE
M-
O
PEN
R
59
10
0
R75
100
R85
100
R84
100
C72
300
C73
300
C74
300
R78
10K
R83
100
R82
100
R89
100
C75
300
C76
300
C99
300
R39
100
R38
100
R41
100
C44
221
C45
221
C46
221
D
S-
ST
B
1
D
S-
D
A
T
D
S-
C
LK
R
60
10
0
R
62
10
0
C
63
30
0
C
62
30
0
R79
1K
R80
1K
R81
1K
L4
10UH
+R5V
ST/MO
R3
4.7K
ECO VCC
A5V1
C11
104p
C
17
10
4p
L5
2.2k
L6
2.2K
R
13
10
0
EC
O
PO
W
ER
R
15
10
0
C29
300
1
2
3
4
5
6
7
8
IC8
AC6811
CPU5V
R23
1K
R16
1K
R14
10K
M-DOWN
36
M-UP
35
LED
34
DVD-STB
17
DVD-CLK
16
M
U
TE
30
PLL-DA
21
SU
R
-M
U
TE
29
RDS-SDA
19
EO
C
-P
O
W
ER
27
SD
A
26
SC
L
25
TU
N
-O
N
24
PL
L-
C
E
23
PLL-CL
22
TE
ST
9
V
ss
6
X
T-
O
U
T
7
X
T-
IN
8
M
-C
LO
SE
32
DVD-DI
15
DVD-DO
14
DVD-ON
13
RESET
12
X
-O
U
T
11
X
-I
N
10
RDS-Q
20
RDS-SCL
18
M-
O
PEN
33
V
dd
5
C
LO
SE
-S
W
4
D
V
D
-T
MS
3
O
PE
N
-S
W
1
ROT-A
41
K
EY
2
ROT-B
42
REMTOE
40
DS-CLK
39
DS-DAT
38
DS-STB1
37
ST
A
N
D
B
Y
31
ST
/T
U
N
ED
28
M+
43
M-
44
IC3
2SC9228
O
U
T
G
N
D
IN
IC9
7805
C93
100uf/16v
+5V
R25
H1A 125V
C49
104
R
33
4.
7K
R
34
2.
2K
R
36
2.
2K
R
37
2.
2K
R
40
2.
2K
EC
O
PO
W
ER
R
10
8
10
k
R
10
9
10
k
R
12
0
10
k
C
PU
5V
-28V
FL
-I
N
SR
-I
N
+12V
EC
O
PO
W
ER
EC
O
V
C
C
D
G
N
D
EC
O
G
N
D
C
EN
-I
N
SW
-I
N
SL
-I
N
FR
-I
N
M
U
TE
-
DVDGND
DVD-vcc
LE
D
V
F1
V
F2
K
EY
FE
R
Q
-H
R110
1K
R111
1K
1
2
CN14
2P/2.5
DM+
DM-
R113
1K
R114
1K
R112
2.2k
R116
2.2k
C105
470p
C
10
4
47
0p
Q13
8050
Q12
8050
Q11
8550
Q10
8550
M-
D
O
WN
M
-U
P
M-DOWN
M-UP
LED
FE
R
Q
-H
1 2
CN15
2P/2.0
R118
10K
D7
4148
R117
10K
C108
100UF/16V
LED
+1
2V
Q14
8050
R115
4.7K
1
3
2
J200
RCA-2P
+5V
DVD-vcc
K
EY
ST
A
N
D
B
Y
-
SU
R
-M
U
TE
-
R
O
T-
B
-
R
O
T-
A
-
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
CN6
34P12
1
2
3
CN401
3P/2.0
1 2 3
JACK401
OPTICL
+12V
M-DOWN
M-UP
R
EM
O
TE
K
EY
LE
D
Q3
BC817
Q4
BC817
R127
1M
R126
1K
R128
1M
R125
1K
C122
1UF/50V
C123
1UF/50V
C112
100p
C113
100p
R
12
1
10
K
R131
220
C109
100UF/16V
C111
104P
R129
2.2K
R130
2.2K
V
+
1
O
U
T1
2
IN
1
3
IN
T
4
G
N
D
10
O
U
T2
9
IN
1
8
SW
7
V
R
EF
5
SE
N
C
E
6
IC10
D2761
C
12
0
10
0U
F/
16
V
C
11
8
22
4(
M)
C
11
7
22
3(
M)
C116
224(M)
C114
224(M)
C
11
5
1U
F/
50
V
R124
2.2K*
C
11
9
1U
F/
50
V
C
12
1
10
4P
R
12
3
10
K
R
12
2
22
0
+12V
DZ1
3.3V
osci
1
osco
2
int
3
vss
4
sda
5
scl
6
clk
7
vdd
8
IC088
8563
C090
104
C089
15P
CLK OUT
SCL
SDA
X008
32.768KHz
CPU5V
1
2
3
4
5
6
7
CN088
7P/2.0
TUN-R
AGND
TUN-L
CPU5V
SCL
SDA
CLK OUT
9 - 1
CIRCUIT DIAGARM - CPU BOARD
9 - 1
Summary of Contents for MCD755
Page 12: ...4 1 4 1 SOFTWARE VERSION CHECK AND UPGRADING ...
Page 14: ...6 1 6 1 SET WIRING DIAGRAM ...
Page 16: ...LAYOUT DIAGRAM TUNER BOARD 7 2 7 2 ...
Page 18: ...8 2 8 2 LAYOUT DIAGRAM VFD BOARD ...
Page 20: ...LAYOUT DIAGARM CPU BOARD 9 2 9 2 ...
Page 21: ...9 3 9 3 LAYOUT DIAGRAM CPU BOARD ...
Page 23: ...10 2 10 2 LAYOUT DIAGRAM AMP BOARD ...