Page 1
Standard schematic diagrams
Main section
5
SHEET 3/6
4
MX-G51R
SHEET 2/6
SHEET 3/6
SHEET 5/6
(SHEET 6/6)
TO CON1
3
SHEET 2/6
SHEET 4/6
2
SHEET 4/6
MAIN signal
TUNER signal
1
CD signal
TAPE P.B. signal
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
TAPE REC. signal
SHEET 1/6
2-2
HABC DEFG
Page 2
Amplifier section
MX-G51R
5
SHEET 1/6
4
SHEET 1/6
3
2
Parts are safety assurance parts.
When replacing those parts make
sure to use the specified one.
1
MAIN Signal
SHEET 2/6
ABCD E F G
2-3
Page 3
Front control section
MX-G51R
5
4
SHEET 1/6
SHEET 1/6
TO RCW5
SHEET 4/6
3
2
1
2-4
SHEET 3/6
HABC DEFG
Page 4
MX-G51R
CD section
5
SHEET 1/6
4
SHEET 1/6
3
2
1
CD signal
SHEET 3/6
SHEET 4/6
ABCD E F G
2-5
Page 5
MX-G51R
Tuner section (Ver. B, E, EE, EV)
OOP
AM
L
FM
5
148
148
4
4
D2
D1
10
R10
4
K
FMT
ANT
1
T
AN
R9
220
MA
3K
47
C7
00011A
3
(
UNE
KST-F
R
2
34
C
NC
AG
GND
R2
K
223
15
C1
R1
D4
7
A2
SVC3
6
1
5
2
S
3
4
S
S
1
6
2
4
3
LA
DTC
OUT
GNDX-
20
1918
VA-
404
56
VT
22K
223
C2
48
MO
6
0LMO
6
S
4
S
3
2
S
1
S
Q3
143
TK
D
F/35
2.2u
+
103K
EC3
1K
C12
T
R21
U
N
AO
AI
PD
6
1
17
LC72131 MICO2
12
N
CE
XI
X-T
D
UNE
T
AL
7
.2MHz
(12p
/US)
180
C14
220
C15
V
EO
12
c
TER
L-OUTGND
Vc
S
456
3
221
C16
1K
R22
T
1
-OU
CE
R
2
12
SHEET 1/6
1
3
DI
1K
R23
IN
ATA
D
8 9
7
CON 01
4567
DO
CLK
10K
R26
1K
1K
R25
R24
UT
O
A
LK1
DAT
C
10
NG)
4
GA
7
78
100
OUT
IF
*
**
R3
R11
0
15
C8
Q4
5.
1413
T
MO/S
K
10
104
9
C4
12
OSC
M
F
K
SCL
RD
R4
OUT
K
OSC
10
100K
030
1
R13
C4
Q5
C14
DT
6K
OSC
M
A
FM
12
89
MUTE)
AM/FM
IF
REQ(
W)
1/2
Z5.1V(
D3
TA
DA
S
D
R
13
A10-A
1
CF
.7MJ
SFE10
102
102
0
C9
C1
3TK
3
C1
OUNT
C
IF
11
10
SW
0
3.3
56
R5
R6
100
R1
2
K
114E
Q2
A
1K
R16
10
R19
/16
5
7uF
4
EC
101
p
33
10K
C68
R28
330
8
C6
C
VC
uF/16
+
47
EC2
1
2
3
4
5
LO
0007A
0
6
TC1
43TK
R18
2.2K
R20
d
Vd
15
W
MW/L
R17
D
D-GN
11
2
314
Q1
R39
0
33
470
R8
R7
2
3
K
10
R1
223
SV
C6
12K
R15
29
30
2
27
8
0
16
4
4
uF/5
0uF/
1
10
1
10
+
+
2
8
7
C19
C4
EC
EC
10K
R31
26
2
25
5.1K
102
4
C20
R1
EC9
4.7u
F/35
393
2
C2
4
22
23
3
22
22
4
C2
C23
392
C21
2
1
20
82
C45
B.P.F
35
2uF/
+
2.
2
R3
3.3K
19 18
2
x
1
10
11-
010
5
/3
2uF
0
2.
EC1
LA1837IC01
16
3
47
10uF/
C11
EC6
100
1234
+
0
56
2
R5
2
AM
CF
75E
SFE10.7MS3A
+
473
C30
/16
+
473K
47uF
14
EC
C27
***
IF
-380
16
47uF/
C20
E
CF
FILT
R38
LTSD
6
5
4
ER
450
789101112
0
15
R42
K
K
47
47
1
R50
R5
B
473
4
C4
.7K
4
1
FD
R4
A3
473
3
C4
47
R43
3S
0
3
***
47
473
C28
R40
10uF/35
5.1K
1uF/5
+
+
EC16
R44
C29
EC15
+
2
82
B.P.F
/16
10uF
12
C46
EC
+
C11
E
R33
3.3K
17
6
1
151413
.3K
3
0
F/5
R46
F/50
K
0.47u
1u
5.1
+
+
17
R45
EC
K
2.2
10uF/16
13
R34
EC
+
3.3K
R36
50
F/
5.1K
1u
+
9
18
R47
EC1
EC
K
2.2
R35
3
3.3K
183
5
C2
18
R37
C26
16
1
6
)
/2W
0uF/1
1
+
V(1
C21
Z3.3
E
D5
p
47
1
C6
2K
2.
R61
1514
I
23
470
3
R6
p
56
C62
AL
X-T
2MHz
4.33
K
R62
39
13
12
1
C03
5
F/3
2u
2.
EC22
1924
BU
4
56
2
10
3
C64
47
+
K
3
3.3
C6
R64
RDS
9
1
10
78
0
56
C65
D
N
G
RDS
03K
1
C5
0
560
R30
FM/TUNER SIGNAL
AM SIGNAL
2-6
SHEET 5/6
HABC DEFG
Page 6
MX-G51R
Tuner section (EE Only)
AM
LOOP
FM ANT
FMTU
21 34 56
T
NC
AN
148
5
4148
D1
4
4
D2
R9
102
R10
10K
MA
A2
3K
47
C7
6
4 5
S
6
4
LA
011
00
3
X-OUT
20
123
XIN
2
7.2MHz
X-TAL
(12p
/US)
(
NER
D
GN
AGC
0R0
R1
D4
48
SVC3
7
2 1
S
3
S
2 1
3
A
Q3
C143T C143T
103K
C12
UT
AO
GND
19
1
ICO
DI
CE
221
C16
K
ST-F402VD 3GANG)
VT
VCC
+
223K
C2
6
0LMO
MO
6
1
2
S
3
4
S
3
4
2
5
S
LO
00007A
6
1
S
Q4 Q5
+
EC3
3.9K
2.2K
R20
R21
AIN
PD
1
615
17
LC72131
R18
Vdd
0.47uF/50
8
2
4567
DO
CLK
MW/LW
10K
10K
R26
R17
47uF/16
EC2
5.6K
78
IFOUT
0
56
R3
R11
15p
C8
FMOSC
14
T
MO/S
OUT
OSC
10
100K
R13
13
FM
AM/
R4
0
03
1
C4
C143T
AMOSC
M
89
101
FM
12
IF
REQ(MUTE)
2
Q1
314
0
33
470
R8
R7
3K
FD
A33S
223K22
4
C23
C2
222K
C21
20
47
R43
***
473
473
1uF/ 50
+
C28
C29
R40
EC15
K
10
R1
223K
SV
C6
12K
R15
473
10uF/16
1
C1
EC6
30 2729 28 26 25
1
+
CF2
0.7MS3A10-A
SFE1
***
R38
34
2
/16
+
473K
47uF
14
C27
EC
AM I F
E-380
75
F
LTSD450B
/35
104Z
2
C4
10uF/16
1uF
104Z
+
+
8
7
C19
EC
EC
102K
5.1K
C20
R14
EC9
4.7uF/35
4.7K
R31
393K
2
C2
232 4 22 21 19 18 17 16
837M
IC01
LA1
5678910111
0
15
R42
47K
47K
4.7K
1
1
R4
R5
CF
ILTER
4
R50
2K
822K
82
2
x
1
C45
11-10
010
B.P.F
5
/3
2.2uF/ 35
2.2uF
+
0
C11
E
EC1
3.3K
2
R3
2
13
/16
5.6K
10uF
+
R44
EC16
/16
C46
B.P.F
+
3.3K
R33
10uF/16
10uF
+
+
EC13
EC12
1514
3.3K
R46
F/35
47u
0.
1uF/35
5.1K
+
+
+
18
R45
EC17
EC
2.2K
R34
3.3K
183K
5
R36
C2
1uF/35
5.1K
9
R47
EC1
2.2K
R35
3K
3.3K
18
R37
C26
102K
C9
IF COUNT
0
10-A
*
1
7MJA
CF
C4
SFE10.
R12
100
Q2
A114E
102K
C10
R16
R19
7uF/16
4
EC5
100p
C13
3K
56
10
3.3K
C5
R6
R5
K
1K
100
11
330
10
SW
C68
10K
560
R28
R30
100
R39
+
473
47uF/16
C20
C30
E
473
4
C4
473
C43
p
18p
C14
D
TEREO
TUNE
S
SHEET 1/6
123456
1
22
C15
1K
R22
1K
1K
R23
R24
T
D
-OU
L-OU T
Vcc 12V
R
GN
DATAINCLK1
CE 1
7
8 9
CON
4
10
1K
9
C4
R25
OUT
D
A
DAT
D-GN
10
11
1
0
Z5.1V(1/2W)
D3
FM/TUNER SIGNAL
AM SIGNAL
SHEET 6/6
ABCD E F G
2-7
Page 7
5
Eco board
4
MX-G51R
Power transformer board
3
Head phone board
2
1
2-13
HABC DEFG
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