AO
AP
AR
AT
AV
AX
AQ
AS
AU
AW
RD-M52MD/M72MD
Y39-3490-51
IC1
IC12
IC2
IC3
IC4
IC14
IC5
(X29-270X-XX)
RD-M52MD-L (2/3)
D
E
F
G
CN2
CN1
CN5
CN6
Q7
Q6
MD BACK UP
DETECTOR
POWER
D
CN9
RDS
DEMODULATOR
Q2
D12
S1
D10
PROTECTION
DRIVER
D1
Q1
D4
D2
RESET
RESET
IC
+5V AVR
-5V AVR
(MD)
Q4
Q3
B
SYSTEM u-COM
-10V
ON/OFF
DRIVER
(Q4)
C
D26
3/3
X07-A/5
-CN5
3/3
-CN6
X07-A/5
3/3
-CN14
X07-E/5
3/3
-CN9
X07-C/5
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
M ST
OP
MD CE/DECK DA
T
A
MD RST/DECK CLK
BACKV ON/DECK SL
T
OP
BACKV CHK/DECK SL
T
CL
RDS CLK
EVR DA
T
A
EVR CLK
HP
DET
HP
RL
Y
PWRRL
Y
SPRL
Y
A
MUTE
EMP/MONO
PLL
DO
VSS
PLL
CE
VCC
PLL
CLK
PLL
DA
T
A
ST
SD
T
MUTE
RDS DA
T
A
A
TRAC
REC GAIN
REC R SW
TYPE SW
PLA
Y
SW
HALF SW
REC F SW
PH SW
CL SW
LCD CS1
OP SW
SCL
SDA
STB
W/R
SMK 3
SMK 2
SMK 1
SQCK
SQSO
SMK M/D
LCD RST
LCD SCL
LCD AO
LCD SI
B SW2
SCLK
SENS
F
AN D/A
D
ATA
XRST
CLOK
BYTE
CN VSS
XT
IN
XT
OUT
RESET
X OUT
VSS
X IN
VCC
NMI
uCOM CE
REM
SCOR
STBY
RED
LCD BKL
T
STBY
GR
LED CD
LED MD/T
APE
CD XLA
T
ENC A
ENC B
MD RXD
MD TXD
LD ON
SPEED
DC OFF
LOAD OUT
LOAD IN
V/H
D IN SW
8 SW 1
XY SW
PROT
PROT TEMP
A IN LEVEL
BACKV
RDS S LEVEL
KRO
A VSS
KRI
AVREF
A VCC
12SW
8
7
6
5
4
3
2
1
SC OUT
C IN
VSS A
VDD A
MPX
VREF
RD DA
T
A
QUAL
9
10
11
12
13
14
15
16
TSTLD
TEST
VSS D
VDD D
OSC1
OSC0
T57
RD CLK
11
10
9
8
7
6
5
4
3
2
1
LCD CS1
GND
STB
W/R
LCD RST
LCD AO
LCD SCL
LCD SI
+5V
-10V
DIMMER
1
2
3
4
5
6
7
8
9
10
11
12
13
ENC B
ENC A
LED CD
LED MD/TAPE
STBY GR
STBY RED
REM
LED +5V
u+5V
GND
KEY GND
KRO
KRI
5
9
11
13
10
7
8
6
1
3
4
2
12
Lch
A GND
S GND
Rch
u +5V
u GND
TUNER V
F OFF
CD +7V
CD S GND
CD R GND
CD S HOT
MD NR
MD GND
-10V
HPRLY
PROT
SPRLY
PWRRLY
D VDD
T MUTE
PROT TEMP
D GND
SPD I/F
A MUTE
HP DET
A IN LEVEL
FAN CONT
57
91
90
67
68
72
71
69
92
4
X2
X1
R198 1K
R157 10K
R107 220
1000P
C59
1M
R112
100K
R
111
4.7M
R110
C57
22P
C58
22P
R109 1K
C60
0.1
10K
R1
13
0.1
C61
R255 1K
R253 1K
R251 1K
R252 1K
R161 100
R162 100
C64 1000P
C63 1000P
C62 470P
R156 10K
R108 470
R146 10K
5
3
2
1
7
6
26
19
8
21
22
23
24
25
27
28
R1
14
R124 220
45
R256 1K
46
48
R125 220
47
R126 220
R127 220
R128 220
49
50
41
41
1000P
R123
R122
C68
R121
R120
C67
R119
R118
100K
100K
C66
R176 1K
34
R175 1K
33
R174 100
32
R173 100
31
42
1000P
100K
100K
100K
100K
1000P
100K
100K
C69
R116
R117
1000P
R115 220
C65 470P
37
36
R158 1K
79
1.2K
79
1.2K
78
78
1K
77
77
1K
76
R191
R192
R193
R194
R180 1K
R177 1K
R179 1K
R178 1K
68
69
71
72
R142 10K
C70 1000P
73
74
75
67
R160 4.7K
66
65
60
61
63
59
58
47K
R141
R140
47K
47K
R139
R138
47K
57
47K
R137
51
R129 220
R130 220
52
R131 220
53
470P
C173
15K
R153
C75
C74
R195
R196
R148 100
R144 10K
R143 10K
88
84
85
86
87
81
82
83
92
91
15K
R154
R145
2200P
2200P
10K
100
80
93
94
13
8
10
11
12
9
6
7
5
4
1
2
3
STB
PH SW
CL SW
OP SW
SLT CL
SLT OP
TYPE SW
PLAY SW
HALF SW
REC F SW
DECK CLK
DECK DT
REC R SW
51
50
53
52
78
79
41
76
47
77
45
48
49
13
8
12
11
10
9
6
7
5
4
1
3
2
15
14
R282 100
2.2u50
C181
+
330P
2.2
R286
4.332MHz
C186
0.01
47P
C188
C187
22P
R281 47K
0.01
C184
47u6.3
C185
+
560P
C182
100
R283
R285 100
X4
C183
75
56
0.01
C73
R155 100K
R152 100K
C71 0.01
4.3K
R159
4.3K
R151
4.7u50
+
C72
15K
R150
3.3K
R149
R147 10K
90
97
95
4
1
C77
22
R106
100u10
C55
+
330u6.3
C56
+
10K
R105
1
R171
4.7
R172
10K
R102
100K
R103
1u50
+
C52
1K
R104
1K
R101
IN
OUT
GND
C51
2.2u50
+
0.01
C85
47u25
C81
+
18K
R166
10K
R165
10
R164
+
C154
R231
2.7K
VO
GND
ON/OFF
C152
R232
2.7K
0.1
1
2
3
0.1 1/2W
ON/OFF
VREF
V IN
V IN
W31
5
4
R233
VREF
VO
GND
2
1
4
5
3
4.7 1/4W
R234
1000P
10V
470u16
C167
+
C169
4.7
4.7
R238
R239
OUT
2
3
IN
GND
1
C165
33P
57
OUT
C164
C160
3
2
1
GND
IN
33P
0.1
41
33
31
32
34
42
46
97
95
19
21
23
25
24
27
28
220
30
29
22
56
4
+
C151
for CD
MD/DECK
AMP
TUNER
DECK
for CD
for CD
R254 1K
DISPLAY
C140
+
C139
+
330P
C193
330P
C194
1000P
C192
1000P
C191
+7V
+B
10V
+5
+5V
+5V
+5V
10V
+5V
10V
10V
10V
+5V
+B
+7V
+7V
+5V
+B
+5V
+B
+7V
+9V
+9V
+9V
+9V
+7V
+5V
+5V
1K
1K
R197
1K
+5V
C53
0.01
R257 4.7K
54
100K
R258
100u10
C163
+
10u50
C252
+
5V
+12V
+12V
+5V
+5V
+B
+B
+5V
+B
+5V
+5V
+B
+B
+5V
+5V
+B
+B
5V
+12V
+12V
+5V
+5V
+B
+5V
+5V
+5V
+5V
+5V
+12V
5V
+12V
+12V
+B
+B
+5V
+B
+B
+B
+B
+B
+B
+5V
+12V
+5V
5V
+5V
+B
+12V
+B
+5V
5V
7.1V
5.1V
DECK : 20.0V
MD : 8.2V
DECK : 20.4V
MD : 8.7V
4.6V
4.7V
DECK VERSION : 12.1V
MD VERSION : 5.1V
DECK VERSION : 12.0V
MD VERSION : 5.1V
4.6V
4.7V
MD VERSION : 8.7V
DECK VERSION : 20.4V
4.6V
5.1V
4.7V
5.1V
DECK VERSION : 12.0V
MD VERSION : 5.1V
DECK VERSION : 20.4V
MD VERSION : 8.4V
5.1V
4.7V
-9.3V
-10.0V
-10.0V
4.9V
7.1V
5.1V
5.1V
: 12.1V
DECK VERSION
MD VERSION
: 5.1V
-10.0V
7.1V
9.1V
5.1V
: 8.7V
: 20.4V
DECK VERSION
MD VERSION
www.freeservicemanuals.info
1/20/2020
Digitized in Heiloo the Netherlands
Not for sale!