Kenwood KDC-M4524 Schematics
A B C D E
KDC-M4524/G/Y/GY
1
(X25-9622-71/9812-70)
PRE
MUTE
84
100
1
4.7K
L8 4.7uH
IC2
91
R65 4.7K
R51 2.2K
2
SW2
R106
82
2.2K
282526
ACOUTL
VREF
1
4.1V
C309
90
R52 2.2K
SW1
27
ACOUTR
CREF
2
2.2u50
SCL
MS-CLK
SW
1000P
4.1V
D202
D201
543
J4
2
3
4
A1
∗
C
WIRED
REMO
RF GND
FM ANT
AM ANT
OSC GND
FM +B
AM +B
OSC GND
OSC GND
OSC GND
PLL +B
IFC OUT
SDA
DIG GND
VDD 5V
NOISE OUT
RDS OUT
AUDIO OUT
AMIF OUT
S-METER
IF+B
IF1 GND
CN4
1
2
L3
52mH
3
4
5
L5
4.7uH
6
7
8
9
W/N
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
R374
1K
R101 1K
R102 470
R104 470
0.01
C106
R105
4.7uH
4.7uH
4.7K
L7
L6
20
22
R103
E-VOL &
N.C. MPX
V1
SCL
1
2
5
6
R64 4.7K
1
CN2
D-OUT
C111
FL
LFOUT
+
SDA
MS-DA
J3
FR
4.1V
RFOUT
C201
6
AUDIO+B
R357
R351
C351
RL
4.1V
24
LROUT
CASSL
3
4.0V
2.2u50
7
Lch
100
270
10u16
4.1V
23
+
8
+
RL
RR
RROUT
C202
GND
R355
Q351
C356 0.1
L10
4
4.0V
2.2u50
9
PRE MUTE
REAR
30K
4.7K
Q101
4.7K
R111
4.7K
BUFFER
∗
B
C210
4.7uH
0.01
C211
47u10
+
8.1V
22
VDD
CDR
CASSR
5
4.0V
R
+
D51
R53 1K
R61 100K
10
Rch
0V
21
6
4.0V
D52
29
MUTE-R
R356
30K
Q352
C116
330P
GND
CDL
CDGND
7
4.0V
L
G
R62 100K
4.7K
11
12
8
R358
R352
C352
SCL
5V
0V
RH-
1K
R206
∗
28
R54 1K
11
MUTE-L
2.2u50
SDA
9
100
270
10u16
RR
R113
2.2K
R112
2.2K
C117
5.0V
0V
C118
R209 10K
AFS
C203
C204
25
R55 1K
12
M-RST
+
+
680P
10
4.0V
0.022
0.01
R56 1K
13
REQ H
1
2
GND
3
B.U.
CH-CON
4
MUTE
5
A. GND
6
RST
7
8 Rch
REQ C
9
DATA C
10
DATA H
11
12 Lch
CLK
13
RDS DEMODULATOR
IC7
1
QUAL
2
RDDA
3
VREF
4
MPX
5
VDDA
6
VSSA
7
CIN
SCOUT
5
R210 10K
R207 1K
R208 1K
19
20
5V
SDA
0V
MPX
AM
11
4.0V
0.47
R202
C205
4.7K
R201
10K
150P
C206
24
27
R58 2.2K
R63 2.2K
14
15
N.C
SW3
M-STOP
812 342
1113
10
7651
R302
C302
51
62
73
84
Rch
10
+++
0.47u50
R
R301
C301
D309
9
10
11
12
Lch
10
0.47u50
9
R252
1
W102
0V
2
0V
TAB
D258
47K
C255
1u50
PGND2
33K
R251
+
4.9V
STBY
OUT2-
5
3
6.7V
6.7V
RR-
D256
14.3V
VCC1
OUT2+
RR+
D254
7
6.7V
0V
846
OUT1-
FR-
C256
PGND1
D252
33u10
6.7V
10
9
6.7V
+
SVR
OUT1+
C252
FR+
13
CLK
RST
DATA H
4.7K
R307
R310 100
R311 100
D307
L
D304
689596
DATA C
4.7K
R309
D308
D306
R313
100K
R312 100K
94
R305
MUTE
4.7K
85
R315
100K
C304
0.01
R308
REQ C
4.7K
D305D302 D303
R314
100K
88
POWER
IC
IC4
Q350
22K
MUTE DRIVER for
22K
AUDIO MUTE SW
31
26
5.0V
5.0V
5.0V
14
121311
VCC
AIN1
2
85
R41
47K
0.22
220u16
AIN3
AIN2
+
9108
CIN1
CIN2
CIN3
AOUT
COUT
0V
BIN3
BIN1
BIN2
BOUT
GND
3
6
5
4
7
5.0V
6
2
IC9
13.4V
0V
ON/OFF5GND1
VOS
SWOUT
7.4V
4
0V
5.0V
Q41
47K
R42
C43
+
220u16
VIN
1
2
3
0V
14.3V
D41
L12
PANEL 5V
SW
C42
100u25
+
+
C41
100u25
Q151
47K
10K
IC6
ANALOG SW
(MUTE LOGIC)
1
Q21
R21
1.5K
D21
MECHA 5V
AVR SW
45
CD MECHA
+B
R43
47K
C45
C44
R161 2.2M
SERVO
+B AVR
+
SW 14V
C21
Q22
47u16
Q41
D156
100K
D153
R154
R175
D161
D152
D160
98
99
470
470
R152
470
470
R173
L-CLK
L-DATAS
D151
3
10
47
R172
R176 1K
14
15
P1
ESD-GND
2.2K
R160
D159
1K
R183
13 11 9 7 5 3 1
SW5V
PAN EL
REMO
D162
R171
1K
D154
13
L-DE
R153
R174
D155
470
100
R162
D158
D157
89
97
15
RST
R181 10
1K
1K
R182
R180
L-INH
L-DATAL
RST
LED+B
LED+B
26481012
ILL GND
PAN 5V
D GND
J2
B.U.
GND
REQ H
A. GND
CH-CON
4.7
R306
100
R303
R304 10R317 4.7K
C303
47u10
G
D311
86
D310
69
87
R114
2.2K
16
15
R115
C112
2.2K
27P
14
X3
C113
4.332MHz
27P
13
5.0V
12
0V
11
10
C114
0.01
98
C115
10u16
+
2.5V
D301
5V
RDCL
0V
TCON
OSCO
OSCI
VDDD
VSSD
SYNC
MODE
NOISE BUFFER
63
C212
18
D203
12
0-4.9V
0.1
19
DGND
Q201
R211
0V
171815
SMUTE
LEVEL
R203
4.7K
D4.5V
1K
16
QUAL
13
0-4.9V
R59 100
212023
D4.5V
MUXR
MPIN
14
4.9V
23
LO/EJ
R205
2.2K
R204
4.7K
MUXL
MPOUT
C213
0.1
22
20
22
R60 2.2K
22
MOSW
83
2
24
SERVO+B
SERVOGND
4
D206
SCL
5V
0V
16
17
BU5V
DGND
to CD MECHANISM
7
14
X25-9622-71/9812-70 (1/2)
JIHGF
VCC1
KDC-M4524/G/Y/GY
0V
8
PGND1
OUT1-
7
6.7V
FR-
D252
+
151
47K
0K
R181 10
2
31
PAN 5V
ILL GND
C256
9
6.7V
D GND
33u10
6.7V
10
SVR
OUT1+
FR+
+
C252
J5
C254
0.22u50
6.7V
12
IN1
11
0.22u50
FR
RR
IN2
6.7V
60
RL
4.3K
R253
C253
0.22u50
1u50
C257
6.7V
14
IN4
SGND
IN3
13
15
0V
C251
0.22u50
FL
D251
R406 100K
R405 100K
R401 100K
R402 100K
R403 100K
R404 100K
0-4.9V
82
0-2.2V
83
84
85
85
86
87
88
90
91
94
95
96
97
98
89
99
100
(X25-9XXX-XX)
MODEL NAME
KDC-MP222
KDC-MP4023/G
KDC-M4524/G
KDC-M4524Y/GY
9
R254
+
ACGND
17
6.7V
10
OUT3+
FL+
5V
0V
D253
E2
14.3V
0V
201618
PGND3
OUT3-
19
6.7V
FL-
D255
76
N.C
77
N.C
78
N.C
79
N.C
80
N.C
81
N.C
82
S-METER
83
NOISE
84
IFC-OUT
85
CH-MUTE
86
CH-REQH
87
R CLK
88
CH-REQC
89
KEY-REQ
90
LO.S SW(SW1)
91
12EJE SW(SW2)
92
N.C
93
N.C
94
CH-DATAC
95
CH-DATAH
96
CH-CLK
97
L-DATAL
98
L-DATAS
99
L-CLK
100
PLL-DATA
5V
0V
UNIT No.
K
X25-9620-10
M
X25-9620-21
E
X25-9812-70
X25-9622-71
VCC2
6.7V
0V
R256
D270
OUT4+
RL+
D257
PLL-CLK1AFS
1
22K
4.3V
22
R264
5V
0V
59
MUTE
232125
6.7V
100K
75
(DC DET)
2
2
+
C258 1u50
0V
24
OUT4-
RL-
PHONE
0.6-4.2V
5V
0V
IC2-SDA
TDF-DET
3
4
4
3
A
NO
NO
YES
YES
PGND4
HSD
0V
727374
AVSS
AVREF
or
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
5V
0V
IC2-SCL
5
5
BC
5.0V
71
5V
0V
5V
0V
6
5.0V
R257 4.3KR255 220
D271
D269
6
AVDD
AVCONT
5V
0V
EVSS
EVDD
7
0V
C23
YES
YES
NO
NO
TH1
8
2
9
69
68
6667686970
N.C
CH-RST
CH-CON
5V
0V
5V
0V
BEEP
N.C
REMO11L-INH
9
10
10
R24,
R23
411
NO
NO
YES
YES
YES
NO
YES
NO
N.C
R QUAL
11
SERGE
DET.
N.C
5V
0V
R DATA
12
12
R32
100K
100K
22K
22K
36K
100K
R2
R3
5V
0V
J1
Q1
N.C
5V
0V
L-CE
13
R206,
416
YES
YES
9810
REAR L+
FRONT L+
FL+
RL+
R1 82K
D2
45
63
6162636465
N.C
N.C
PRE MUTE
IC1
SYSTEM
u-COM
5V
0V
N.C
151413
16
15
R412
YES
NO
NO
NO
YES
YES NO
7
FRONT L-
FL-
D3
R4 20K
1000P
R5 10K
Q2
60
P-STBY
DSI
Q401
RST
11
6
REAR L-
FRONT R-
RL-
C3
R6
10K
B.U.
DET.
R7
100K
59
P-MUTE
5V
0V
240
R407
R417
YES
YES
NO
REAR R-
FR-
(SVR)
5V
0V
or 0V
D402
12513
FRONT R+
RR-
FR+
TEL
MUTE
∗
R32
C31
0.01
D31
∗
0V
5657585960
N.C
BVSS
5V
0V
N.C
17
Q23
NO
YES
NO
NO YES
4
P-ANT
REAR R+
3
RR+
R31
10K
47K
R33
A
C409
47u16
+
C410
0.01
5.0V
TEST
0V
DSI
ILLUMI
SW
D23,
25
NO
YES
YES
P-CON
SW
5V
55
BVDD
5V
0V
N.C
N.C
201918
W101
NO
NO
YES
YES
15142316
ACC
PHONE
2
R8
3.3K
1/2W
R9
33K
C4
0.01
D4
R10
10K
Q3
53
74
Q3
52
ACC
DET.
46
74
52
53
525354
N.C
BE DET
ACC DET
0V or 5.0V
5V
CD MECHA+B
0V
0V or 5.0V
LOE/LIM SW(SW3)
N.C
LO/EJ
MOSW
21
22
22
1
GND
C5
R11
R13
5.6K
Q4
46
51
PS1-2
IC2 TYPE0
IC2 TYPE1
CLKOUT
5V
0V
M MUTE R
M MUTE L
M RST
M STOP
252423
252423
FUSE
C1
2200u16
D1
0.01
100K
R12
47K
PS1-1
PS1-0
PS2-1
PS2-0
SW5V
TYPE0
TYPE1
VDD
VSS
REGC
RESET
MUTE
B.U.
L1
140uH
+
C27
L11
4.7uH
50
49
48
47
46
45
44
43
42
N.C
41
0V
40
0V
39
38
5.0V
37
0V
36
X1
35
X2
34
3.3V
33
XT2
32
XT1
31
30
N.C
29
28
27
26
5V
0V
5V
0V
R408
POWER SUPPLY IC
R22
4.7K
2
∗
3
R23
4.7K
D23 D22
∗
∗
C24
+
10u16
+
C26
C25
10u16
∗
1
Q23
C30
+
10u50
1K
R24
∗
51
R25 1K
50
R26 1K
49
R27 1K
48
R28 1K
47
51
50
49
48
47
R44
47K
∗
R412 100K
∗
R411 100K
∗
R416 100K
∗
R417 100K
R415 100K
R419 100K
X1
20.000MHz
15K
R409
C405 1
C407
R420 10K
22P
X2
C408
32.768kHz
27P
RESET
31
IC
29
C406
28
0.1
27
5V
0V
D401
R410
4
1
4.6V
100K
VSS
VOUT
IC8
3
2
5.0V
NC
VDD
0V
26
100K
KDC-M4524/G (1/2)
KDC-M4524Y/GY (1/2)
D24
D25
+
C28
10u25
220u16
SW for
POWER
SUPPLY IC
VDD
1
0V
C22
+
2
10u25
W101
∗
3
++
C23
10u25
∗
C29
4
10u16
5
7.9V
6
8.1V
7
14.3V
8
5.0V
9
13.1V
+
VDD
7V
5V
3V
1V
10
D26
5V
3V
11
1V
12
10.3V
P.CON
IC1
:
IC2
:
IC3
:
IC4
:
IC6
:
IC7
:
IC8
:
IC9
:
Q1-3,41,201,401
:
Q4
:
Q21
:
Q22,23
:
Q101,351,352
:
Q151::
Q350
IC3
GND
14.0V
PCON
14.0V
PANT
8.1V
FM
AM
AUDIO
VCC
VDD
VBU
SW1
SW2
ILM
FL+ 8 9
WHT/BLK
FL-
GRY/BLK
FRFR+
P CONT
BLU/WHT
ANT CONT
BLU/WHT
B.U
2
4
A
1
3
24
1B3
RR-
FR+
RR+
UPD703030GC011
TDA7407D
BA4911-V4
TDA7560
HD74HC27FP
SAA6581T
PST3436UL
SI-8050JD
2SD1819A or
2SC4081
2SA1036K
2SD2375 or
2SD2396
UMC2N
UN5216 or
DTC143TUA or
KRC410
UN5114 or
DTA114YUA or
KRA307
UN5112 or
DTA124EUA or
KRA303
SIGNAL LINE
GND LINE
B LINE
REAR L
REAR R
GRN/BLK
VIOL/BLK
VIOL
12
10
9
11
5
7
8
6
GRY
WHT GRN
GRY/BLK
WHT/BLK
FRONT L
FRONT R
DC CORD
(B30-4784-05)
(B30-6131-05)
WHT GRN
GRN/BLK
10
VIOL/BLK
6711
GRY VIOL
512
413
BRN
314
RED
215
BLK
YEL
116
GND
68
ACC
5
7
68
57
(B30-4790-05)
FL-
RL-
FR-
FL+
RL+
(B30-6134-05)
D1
D2-4,201,202,309,310
D21
D22,23,251-255
D24,25
D26
D31
D41
D51,52,152-155,160,161,
203,206,269-271,401
D151,157-159,162,
301-308,311
D156
D256-258
14
13
3
4
BLU
BLU/WHT
P. CON
ANT CONT
RL+
RLRRRR+
TEL MUTE
DC CORD
1N5393G-M6 or
:
S2V20
MA4068(N)-M
:
MA4082(N)-L or
:
HZS9A1L
AM01Z or
:
DSM1SD2 or
ERA15-02
D1F60
:
MA152WK or
:
DAN202K or
KDS184
MA4047-M or
:
HZS5B1
SFPB-54V
:
:
1SS133
:
MA4062-L or
HZS6C1
:
HZS12A2
:
S1J or
D1F60
:D402
B30-1567-05
X16J1
2/2
15 16
21
RED
ACC
∗
A
1
B.UP
YEL
BLK
GND
2
3
4
A
5
6
CAUTION : For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list).
Indicates safety critical components. To reduce the risk of electric shock, leakage-current or resistance measurements shall be
carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.
• DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual
instruments or/and units.
X25-9622-71/9812-70 (2/2)
7
15
Loading...