AU
AV
AW
AX
AJ
AK
AM
AO
AQ
AL
AN
AP
AR
AS
AT
2
1
3
5
7
4
6
Y05-3880-13
AR-304/KRF-A4020
SP.
A
B MUTE
R D S
EON FM
TI.VOL
AM
MW
LW
S.DIRECT
TAPE2/MONI
TA
NEWS
TP
PTY
MEMO
STEREO
TUNED
AUTO
MHz
kHz
34
32
33
35
30
31
29
27
25
26
28
23
24
21
22
20
18
19
17
16
14
15
12
13
11
9
7
8
6
5
4
2
3
10
NP
F1
F1
1
10G
8G
9G
5G
6G
7G
4G
3G
2G
1G
P7
P6
P9
P8
P15
P13
P12
P14
P10
P1
1
P16
NP
F2
F2
G7
PLL
DO
33
98
1
G9
P5/KS1
80
34
STEREO
G6
97
35
SD
G5
96
36
RCV CE
G4
95
37
A
VSS
G3
94
38
RST
G2
93
39
EXT
AL
G1
92
40
XT
AL
91
41
VSS
P16
90
42
TX
VDD
89
43
TEX
P15
88
44
VDD
P14
87
45
VFDP
P13
86
46
SEL
STB
P12
85
47
SEL/PLL
DT
P1
1
84
48
SEL/PLL
CLK
P10
83
79
P4/KS2
G10
2
78
P3/KS3
NC
3
77
P2/KS4
RDS CLK
4
76
P1/KS5
RDS DATA
5
75
KS6
6
74
KS7
(VOL) ENC1 CW1
7
73
S.W MUTE
REM IN
8
72
CCW1
9
71
LIMITTER
10
70
11
69
KR0
12
68
KR1
13
67
KR2
14
66
STANDBY
PROTECTION
15
65
S DATA
16
64
POWER
S BUSY
17
63
E2 DATA
18
62
E2 CLK
19
61
RELAY B
(SEL) ENC2 CW2
20
60
RELAY A
CCW2
21
59
(MLT) ENC3 CW3
22
58
CCW3
23
57
8/16
24
84
83
85
86
88
87
90
91
81
82
P9
P6/KS0
81
82
100
G8
T
MUTE
PLL
CE
49
50
31
32
51
54
52
53
55
56
A MUTE
10dB ATT
VOL DT
VOL STB
VOL CLK
30
27
AV REF
S LEVEL
29
28
26
25
99
GND
IN OUT
97
93
95
94
96
99
98
100
100
99
98
97
96
95
94
74
75
R552 1K
0.01
C507
C509 100u10
+
0.01
C514
R568 10K
C517
1u50
R536
1K
C534
0.047F
+
+
470u6.3
+
C535
R574
1K
10K
R577
R582
1K
+
1u50
C525
100K
R573
220
R575
R576 220
10K
R581
5.5
R549 330
100K
100K
R548
R550 100K
R551
R547 100K
330
8
VCC
VSS
CPE
7
A2
SDA
SCL
6
A0
A1
5
1
2
3
4
R542 470
R543 470
R544 470
0.01
C513
0.01
C520
10K
R567
R572 10K
C519
0.01
C512
0.01
R571
R566 10K
10K
C518
0.01
C51
1
0.01
R565
R570 10K
10K
VCC
GND
ROUT
R579 470 1/4W
C526 100u6.3
+
(VOL) ENC1
HP. L
HP. R
GND
C62 100P
C61 100P
3
P3
1
2
1
2
3
4
1
2
3
4
P8
P7
NC
NC
NC
col
Dp
P2
P1
P5
P4
P3
NX
NX
NX
76
93
77
78
80
79
83
81
82
86
85
84
87
88
91
90
92
a
b
f
e
c
d
r
p
n
k
j
h
g
m
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11
10
9
8
7
6
5
4
3
2
1
T
MUTE
VOL
DT
VOL
CLK
VOL
STB
PLL
CE
SEL/PLL
DT
SEL/PLL
CLK
SEL
STB
RELA
Y
A
RELA
Y
B
POWER
CH SP/DET
H.P
.Lch
H.P
. Rch
S DA
T
A
S BUSY
PLL
DO
STEREO
SD
8/16
S. LEVEL/
10dB A
T
T
A
MUTE
PROT
F
.OFF
FL
AC
FL
AC
-30V
GND
+5.6V
NC
R503 10K
60
61
64
R505 10K
R506 10K
R507 10K
R508 4.7K
R510 4.7K
R51
1 4.7K
R512 2.2K
R513 2.2K
R514 2.2K
R515 10K
46
47
48
49
50
R531 100
R532 100
R534 100
R533 100
47
49
50
46
48
R539
16
15
0.01
0.01
R528 100
R525 100
R524 100
CP1
10K 6
C504
C531
1M
R169
1000P
C109
8MHz
X501
0.01
C502
R502 10K
R509 100
R586 1K
R540 100K
C533 1000P
C532 1000P
R527 10K
R556 10K
R538 1K
C505 0.01
W145
W70
C506
1000P
10K
R545
10K
R546
100P
C521
1/4W
1/4W
34
33
35
6
1000P
C503
7
11
R530
47K
47K
R529
W160
W28
100
R541
220
R563
220
R558
220
R561
220
R559
20
21
220
R562
220
R560
22
23
20
23
22
21
92
1
1
2
3
4
5
6
7
8
QUAL
RDDA
VREF
MUX
VDDA
VSSA
CIN
SCOUT
16
15
14
13
12
11
10
9
RDCL
T57
OSCO
OSCI
VDD0
VSSD
TEST
MODE
R569 47K
R564 220
C516 2.2u50
+
4
5
5
L501
1uH
330P
C510
10uH
L502
C515
560P
4
R578 220
2.2K
R580
18P
C528
47P
C527
X502
C524
0.01
R537
1
CP2
10K 3
13
12
14
1000P
C508
79
80
76
77
78
76
75
74
78
77
80
79
81
78
77
76
14
13
12
R516
1K
2
22K
R583
100K
R521
10K
R504
1
35
64
61
60
LIMITTER
2
3
1
2
E1
30V
30V
30V
30V
30V
30V
30V
30V
1
2
3
W1
15
W1
14
B
+B
U.K.
EUROPE
AUSTRALIA
2-70
0-51
0-71
E
X
T
GENERAL MARKET
DESTINATION
COUNTRY
U.S.A.
COUNTRY
DESTINATION
CANADA
UNIT No.
0-21
M
ABB.
0-10
P
K
NO
YES
UNIT No.
ABB.
556
R503,
NO
NO
YES
NO
509,583
R504,
P.CALL
NO
507,510
D503-505,
A
115,160
YES
W114,
S505
DIMMER
S511
P.CALL
S513
NO
Q502
CXP82832-162Q
IC51
R504,
556
NO
YES
A
R503,
W72
583
YES
NO
NO
C534
115,160
YES
DIMMER
W114,
S505
P.CALL
P.CALL
S511
S513
CXP82832-162Q
IC51
YES
NO
YES
YES
NO
NO
PTY
(RDS)
DISPLAY
TA/
NEWS
NO
D503
YES
NO
YES
D504
YES
NO
D505
NO
NO
D507
YES
D510
NO
YES
Q502
CXP82840-163Q
COUNTRY
DESTINATION
EUROPE
NO
2-70
E1
YES
NO
NO
PTY
UNIT No.
ABB.
R503,504,
A
556,583
W72,114,
115,160
S505
DISPLAY
(RDS)
NEWS
TA/
NO
YES
NO
S511
S513
Q502
CXP82840-163Q
IC51
D503,
504,507
510
D505,
CXP82840-163Q
RUSSIA
DESTINATION
COUNTRY
556,583
R503,504,
3-81
UNIT No.
Q
ABB.
NO
YES
A
NO
W72,114,
115,160
NO
PTY
(RDS)
DISPLAY
S505
S511
Q502
D504,
507,510
YES
NO
TA/
NEWS
D503,
505
S513
NO
IC51
1
16
15
33
34
35
11
7
6
35
1
W72
W28,
72,145
W28,
145
NO
YES
YES
145
W28,
W28,
YES
145
330
R585
C529 100P
390 2W
R107
R108
390 2W
100u10
C523
+
C522 0.01
R557
10K
4.332MHz
R509
YES
NO
C529
NO
YES
YES
NO
YES
R509
YES
R509
C530
100P
100P
C536
100P
C537
535-537
C529,
530,533,534
C503,521,
533,534
YES
C503,521,
533,534,536,537
YES
C503,521,530,
C529,530,
535-537
C529,
535
C530,
535-537
C503
521,533
2-71
E
EUROPE
R509
DESTINATION
U.K.
COUNTRY
A
UNIT No.
YES
T
0-51
ABB.
NO
556,583
R503,504,
535-537
NO
YES
YES
533,534
YES
145
C529,530,
C503,521,
W28,
S513
S505
S511
NO
PTY
115,160
(RDS)
DISPLAY
TA/
NEWS
W72,114,
Q502
NO
YES
NO
IC51
CXP82840-163Q
D503,
504,507
510
D505,
+5.6V
+5.6V
+5.6V
+5.6V
+5.6V
+5.6V
+5.6V
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+5.6V
+B
+B
+5.6V
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+B
+5.6V
+B
+B
+B
+B
+B
(
)
(
)
(
)
ED51
IC51
IC53
IC52
(X09- ) (C/8)
(X09- ) (G/8)
IC54
DISPLAY UNIT (X09-6XXX-XX) (B/8)
B
AR-304(K,P) (3/3)
KRF-A4020(M,X,T,E) (3/3)
KRF-A4020E(E) (3/3)
KRF-A4020W(Q) (3/3)
u-COM
BAND
SP.A
S512
SP.B
S501
S509
SOUND
S510
S502
S506
S515
S514
BALANCE
S507
D513
D512
Q503
D526
D508
RESET
RESET IC
D511
D517
D516
D515
D509
D523
E2PROM
S518
S517
S516
REMOTE
BASS
BOOST
MONITOR
AUTO
MEMORY
STANDBY
POWER
I /
ON/STANDBY
S508
D527
A501
WH52
CN10
HEADPHONE
J7
CN9
D530
D528
D518
D529
D524
D522
D507
D504
D505
D510
D503
Q502
Q501
CURRENT
BUFFER
RDS
DEMODULATOR
WH51
-CN8
X09-A/8
2/3
MUTE
S.DIRECT
IC52
: X24C02
IC53
: S-806D-Z
IC54
: SAA6579/R
Q501,503
:
Q502
:
D503-505,507-513,515-524,
: HSS104A or
1SS133
D526
:
D527
: B30-2513-05
IC51
:
DIGITAL LINE
GND LINE
SIGNAL LINE
B LINE
B LINE
KRF-A4020W (X09-6143-81)
KRF-A4020E (X09-6142-70)
KRF-A4020 (X09-614X-XX)
AR-304 (X09-6310-10)
2SA933AS(Q,R) or
2SA1309A(Q,R)
A
(9G-2G)
10G
9G
8G
7G
6G
5G
4G
3G
2G
1G
528-530
2SC1740S(Q,R) or
MTZJ5.1(B) or
2SC2785(F,E)
RD5.1ES(B2)
KRF-A4020 (X09-631X-XX)
(BOTTOM VIEW)
-14.7V
-17.8V
-18.0V
-21.2V
-24.5V
-24.5V
-24.5V
4.6V
-1
1.6V
-31.0V
-27.8V
-28.0V
-28.0V
-28.0V
-28.0V
-28.0V
-28.0V
-28.0V
-17.5V
-30.5V
-30.5V
-27.0V
-14.1V
-24.1V
-18.9V
0V
STANDBY: 3.9V
4.6V
0V
0V
4.6V
2.7V
0V
0V
0V
0V
0V
4.8V
0.8V
5.1V
4.4V
4.5V
4.8V
0V
4.8V
4.8V
4.8V
4.8V
4.8V
0V
0V
0V
0V
1.0V
0V
0V
0V
4.8V
4.6V
4.6V
4.8V
-28.0V
(P1)
(P14)
(P5)
(P9)
(P6)
(P10)
(P3)
(P4)
(P2)
(P12)
(P13)
(P11)
(P7)
(P8)
P1
P2
P3
P4
P5
P6
P7
P8
P11
P9
P10
P12
P13
P15
P15
P15
P15
P15
P15
P16
P11
P12
P13
P14
P15
4.9V
-28.0V
-28.0V
2.3V
1.9V
1.8V
-25.3V
-25.3V
2.4V
2.4V
2.4V
2.4V
2.4V
2.4V
4.9V
4.6V
5.1V
5.1V
-31.0V
5.5V
4.9V
4.8V
XS8: 0.4V
SL16: 4.9V
4.6V
4.6V
MUTE
ON: 4.3V
OFF: -2.3V
OFF: 4.6V
ON: 2.0V
SP.B: 4.6V
SP.A: 4.6V
-17.5V
-28.0V
4.6V
2SA1123
2SA992
2SC1845
2SC2631
2SC3940A
2SC4081
2SD1757K
DA204U
LC72131
NJM4565L-D
LA1837
LA1838
TRAITR3N
TRAITR3P
X24C02
SAA6579/R
NJM4580L-D
DTC124ESA
2SC1740S
2SA1586
2SC4116
2SD1819A
UN4212
2SA1309A
2SA1175
2SC2785
CAUTION: For continued safety, replace safety critical components only with manufactur-
er's recommended parts (refer to parts list). indicates safety critical components. For con-
tinued protection against risk of fire, replace only with same type and rating fuse(s). To
reduce the risk of electric shock, leakage-current or resistance measurements shall be car-
ried out (exposed parts are acceptably insulated from the supply circuit) before the appli-
ance is returned to the customer.
The DC voltage is an actual reading measured with a high impedance type voltmeter with no
signal input. The measurement value may vary depending on the measuring instruments
used or on the product.
w w w
.
x
i a
o y
u
1
6
3
.
c
o
m
Q Q
3
7
6
3
1 5
1
5
0
9
9
2
8
9
4
2
9
8
T E L
1 3 9 4 2 2 9 6 5 1 3
9
9
2
8
9
4
2
9
8
0
5
1
5
1
3
6
7
3
Q
Q
TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
