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U
QQ
3 7 63 1515 0
J2
2
4
6
8
10
12
14
16
FUSE
1
3
5
7
9
11
13
15
TEL
MUTE
C30
Q51
SERVO
0.01
AVR
∗
D30
CONTROL
A
SERVO
∗
AVR
R31
47K
Q55
D51
C63
22u16
+
W532
Q50
SW
5V
R101
D102
240
∗
Q101
B
DSI
TE
DRIVER
L 13942296513
5.0V
0V
5.0V
0V
40
SVR
40
R259 22K
39
P-MUTE
39
5.0V
ADJ
R108
R174
0V
2.2K
47K
38
N.C
R117
37
CLK
37
1K
R118 10K
5.0V
36
R115
DATA
36
0V
1K
R116 10K
35
MUTE
35
R119 47K
5.0V
∗
0V
R112 0.1
34
TUNER-TYPE0
2W
0V or 5.0V
R114 47K
0V
33
Vss1
∗
R111 0.1
32
TUNER-TYPE1
2W
R113 47K
∗
R139 47K
31
TYPE0
∗
R140 47K
0V or 5.0V
∗
30
R137 47K
TYPE1
∗
R138 47K
∗
R135 47K
5.0V
29
TYPE2
∗
0V
28
R136 47K
N.C
5.0V
0V
R110 4.7K
27
SD
55
5.0V
26
5.0V
0V
TYPE REF
25
V
CH-CON
24
N.C
23
N.C
22
R58
N.C
470
21
AFS
59
5.0V
0V
∗
R412 100K
25
www
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.
V
POWER
SUPPLY
IC7
(MULTI AVR)
0V
1
GND
∗
GND
D13
14.0V
2
P-CON
∗
D11
14.0V
3
P-ANT
8.1V
4
FM+B
C52
10u16
+
7.9V
5
AM+B
C53
10u16
+
8.1V
6
AUDIO+B
C54
10u16
L2
+
14.3V
7
VCC
27uH
5.0V
8
BU5V
C57
220u16
5.0V
9
VBU
+
VDD
7
5
D50
3
1
10
SW1
VDD
4
3
11
1
SW2
10.3V
12
ILLUM
C56
10u50
+
∗
Q53
R145
2.2K
54
22
21
20
55
19
56
18
47
17
16
49
15
14
57
13
58
12
R144 100K
11
59
10
9
8
7
2
6
36
5
W165
37
4
64
3
R141 4.7K
66
2
R143 4.7K
D103
∗
D110
∗
W404
R163 10
2
∗
Q102
3
4
PANEL5V
SW
5
R169 1K
60
6
∗
R168 1K
5
7
R167 100
11
8
R166 1K
6
9
R165 470
13
10
R164 470
12
11
∗
R170 1K
61
12
∗
R171 47
13
1
R172 1K
14
15
x
ao
y
KDC-3023R
KDC-4024/V/Y/YV (1/2)
.
i
W
8
SIGNAL LINE
GND LINE
B LINE
∗
IC1
:
∗
IC4
:
IC6
:
TDA7479AD
IC7
:
BA4911-V4
IC8
:
HD74HC27FP
IC10
:
TDA7513
IC11
:
PST3435UL
IC12
:
BR24C01AF-W or
M24C01-WMN6T or
S-24CS02AFJ-TB
Q10,20,70,101,201,503
:
2SC4081
Q40
:
DTA124EUA
Q50
:
2SA1036K
Q51,53
:
UMC2N
Q55
:
2SD2375
Q102
:
DTA114YUA
Q223,224
:
DTC143TUA
Q251
:
DTC114YUA
Q252
:
UMG4N
Q253
:
UMA1N
Q501
:
CPH5905
Q502
:
3SK126
∗
D1
:
S2V20
A or
TEL MUTE
1N5393G-M6
D3
:
IMSA-6801
D10,20,70,201,202,401,
402
:
MA4068(N)-M
D11,13
:
D1F60
D12,14
:
AM01Z
D40,101,251-253
:
1SS133
D50
:
DAN202U
D51
:
MA4082(N)-L
D103
:
DA204U
D106,108,109,403-405,
407-410
:
MA4062-L
D110
:
HZS12A2
D411
:
MA3062WA
D501,503
:
RN739F
∗
D504-506
:
(X25-961X-XX)
CN1
UNIT
MODEL
SW3
NAME
No.
SERBOGND
KDC-3023R (M)
0-21
KDC-4024 (E)
SERBO+B
2-70
KDC-4024Y (E)
MO SW
KDC-4024V (E)
LO/EJ
2-71
KDC-4024YV (E)
Q Q
Rch
3
6 7
GND
UNIT
C256
C521
C522 C523 C524 C526
No.
Lch
0-21
33u50
0.1
33P
AUDIO+B
M STOP
2-70
33u50
0.1
33P
M RST
2-71
33u50
0.1
33P
to
N.C
MECHA
M MUTE
UNIT
CF52,
C587
D GND
53
No.
BU 5V
0-21
820P
L72-0716-05
N.C
2-70
820P
L72-0716-05
MECHDET
2-71 820P
L72-0716-05
MSDA
MSCLK
UNIT
J3
L505
SW1
No.
0-21
E58-0879-05
L31-0967-05
SW2
2-70
E58-0879-05
L31-0967-05
1
D OUT
2-71
E58-0879-05
L31-0967-05 L31-0970-05
UNIT
R25,28,31,32,102,134,139,
168,170,171,412-414,521
No.
∗
J3
0-21
YES
1
D-GND
2-70
YES
PAN5V
2-71
YES
ILL-GND
LAMP+B
UNIT
LED+B
R258 R261
R263
R526
No.
0-21
220
10
4.3K
RST
2-70
220
10
4.3K 5.6K
L-RES
L-DATAL
2-71
220
10
4.3K
X16-
J1
2/2
L-CE
A
L-CLK
L-DATAS
REMO
SW5V
PANEL
ESD-G
P1
u163
X
2 9
9 4
7
5
3
1
B
8
6
4
2
P.CON
7
5
3
1
A
8
6
4
2
YEL
BLK
16
1
RED
15
2
BRN
BLU/WHT
14
3
BLU/WHT
ANT. CON
13
4
P. CON
VIOL
GRY
RR+
12
5
FR+
VIOL/BLK
GRY/BLK
RR-
11 6
FR-
GRN/BLK
WHT/BLK
RL-
10
7
FL-
GRN
WHT
RL+
9
8
FL+
DC CORD
(E30-4790)
KDC-3023R
KDC-4024/V/Y/YV
C51,529,
C227,228,404,
A
B
C D E F
C106
557,558,589
528,590,592
YES
NO
1000P
YES
YES
NO
1000P
YES
YES
NO
1000P
YES
1 3
1 5
0 5
8
2 9
C530,
C537,
C553
C568
C581
536,541
538
27P
100P
5P
4P
8P
0.047
220P
2P
27P
100P
5P
4P
8P
0.047
220P
2P
27P
100P
5P
4P
8P
0.047
220P
2P
D11-14,
CN3
D504-506
IC1
IC4
106,108-110
NO
YES
KV1720S
UPD780058GC502
TDA7560
NO
YES
KV1720S
UPD780058GC502
TDA7560
NO
YES
KV1720S
UPD780058GC502
TDA7560
Q40,102,
Q53,
L506
L507
252,253
251
L31-0970-05
L32-0933-05
YES
NO
L31-0970-05
L32-0933-05
YES
NO
L32-0933-05
YES
NO
R67,111,112,140,142,
R135
R136
R137
R138
173,251-254,256,260,529
NO
NO
YES
YES
NO
NO
NO
YES
NO
YES
NO
YES
NO
NO
YES
W160,161,
W405-410,
WH1
400-404
524,578
5.6K
NO
YES
NO
NO
YES
NO
5.6K
NO
YES
NO
m
co
.
Y
2 8
9 9
1
2
3
9 4
2 8
9 9
4
5
6
7
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