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A
B
C
Q Q
3 7 6 3 1 5 1 5 0
1
J4
TOP VIEW
1
REQ H
6
A GND
11
DATA H
2
GND
7
RST
12
Lch
13
11
12
8
4
3
2
3
B.U.
8
Rch
13
CLK
4
CON
9
REQ C
9
10
6
7
5
1
5
MUTE
10
DATA C
∗
1
5
9
J4
A
2
6
10
13
3
7
11
2
4
8
12
R412 100
18
R401
C401
10
0.47u50
7
+
R411 100
17
R410 4.7K
16
R409 4.7K
63
C402 0.47u50
R402 10
5
+
R408 1K
R400 4.7
C400 22u6.3
6
+
R407 4.7K
1
R406 4.7K
45
3
R403 100
46
D408
Q58,59
ILLUMI
D409
+B SW
D405
Q59
D404
Q58
D56
T E
Q60
L
1 3 9 4 2 2 9 6 5 1 3
Q61
Q60,61
ILLUMI
4
+B DRIVER
Q260
MOTOR
+B SW
MOTOR+B
R260 1K
DRIVER
1/2W
Q261
R263 47K
R262 47K
D260
WH1
5
WHT
GRN
FL+
8
16
RL+
WHT/BLK
GRN/BLK
FL-
7
15
RL-
GRY/BLK
VIOL/BLK
FR-
6
14
RR-
GRY
VIOL
FR+
5
13
RR+
BLU/WHT
P. CON
4
12
ANT. CON
BLU/WHT
BRN
3
11
TEL MUTE
RED
2
10
6
BLK
YEL
1
9
w w w
2
4
6
8
A
BU
1
3
5
7
.
P-CON
2
4
6
8
B
1
3
5
7
DC1
(E30-4790-05)
DC1
7
(E30-4785-05)
KRC-15R,179R,
KRC-281R
25R,279R
D
E
F
SYNTHESIZER UNIT (X14-656x-xx)
J2
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
F1 (10A)
+
D50
C50
3300u16
+
∗
D370
∗
0V
R370 4.7K
ANT-CON.
R55
R52
∗
47K
D52
30K
D51
D350
Q49
Q50
R350 4.7K
P-CON.
ACC
BACK-UP
R351 1K
DETECTION
DETECTION
1/2W
SW
SW
R48
Q350,353
100K
P-CON.
DRIVER SW
55
Q350
R353
1K
C350
C159
1/2W
3.3u25
100u10
+
+
C160
Q353
Q351
TH1
10u16
D150
C53
+
C351
100u16
0.068
+
R58
D54
22K
Q352
R381
C54
Q151
22K
0.01
Q51
C380
D352
0.01
C55
Q52
D382
10u10
53
+
Q351
Q51,52
P-CON. PROTECTION SW
BACK-UP
5V DRIVER
Q352
P-CON. PROTECTION
Q151
SVR FORCED
5.0V
INHIBIT SW
DISCHARGE SW
Q53
Q153
P.ON
PRE OUT
5V SW
MUTE SW
1
R382 47K
Q301
RESET
IC6
1
5
5.0V
0V
2
5V
0.9V
0V
CD-CH
3
4
RESET
SW
5.0V
58
R102
47K
0V or 5.0V
61
IC2 CLK
SEL 1
62
5V
62
R CLK
0V
63
IC2 DATA
63
REQ C
FM+B
64
5V
PACK IN
0V
5V
0V
AM+B
65
KEY-REQ
∗
R103 47K
∗
PLL DATA
R104 47K
66
5V
SEL O
0V
PLL CLK
0V
67
VSS O
5.0V
68
∗
VDD 1
IC1
VSS 1
C102
R105
69
5V
X2
SYSTEM u-COM
0V
15P
6.8K
C103
15P
70
X1
4V
4.19MHz
0V
0V
71
IC
5V
72
1.6V
FF/REW
0V
5.0V
73
5V
0V
MOTOR
XT1
5V
74
0V
VDD O
5.0V
75
AVREF O
R106
76
76
S METER
5V
2.2K
0V
0V or 5.0V
77
PHONE
R107
78
78
NOISE
R108
10K
79
47K
AV CONT
80
1V
0V
x
a o
y
i
60
G
H
I
REAR PRE OUT
J5
C452
0.01
R452
R453
30K
30K
0V
Q450,451
Q450
Q451
IC4
PRE OUT
MUTE SW
IC4
POWER
ANPLIFIER
+
+
IC2
E-VOLUME
+
8.0V
4.0V
2.5V
MUTE LOGIC
0V
IC3
14
5.0V
VDD
1
4.4V
13
0V
C152
2
5V
1u50
0V
3
+
4
12
11
5
10
6
9
5V
Q153
0V
5V
0V
R162 47K
7
8
GND
R159 100K
C163 0.01
Q
Q
0V
3
7
6
2
R125
4.7K
41
R65
2.2 1/2W
5V
Q56
R66
Q56,57
2.2 1/2W
8V
DRIVER
Q57
Q55
R63
R64
1K
1K
R124
40
1K
40
R123 10K
Q320
Q54
R122
Q54,55
1K
39
PANEL 5V
47K
39
8V
SW
38
SW
38
47K
37
R321
R320
37
27K
47K
R121 10K
36
R120 1K
36
35
R119 2.2K
Q320
35
34
33
0V
R117
32
SD
32
31
4.7K
30
29
28
28
EQUALIZER
27
AMPLIFIER
27
26
11
9
7
5
3
1
25
J3
12
10
8
6
4
2
P1
24
23
22
21
(X14-656x-xxx)
SIGNAL LINE
MODEL NAME
u 1 6 3
GND LINE
B LINE
KRC-281RG (M)
KRC-179RA/G (E)
KRC-179RYA/YG (E)
.
KRC-15RG (E)
KRC-279RA/G (E)
KRC-279RYA/YG (E)
KRC-25RA/G (E)
J
K
L
8
9
2
4
9
FRONT END
A1
1
RF GND
L3 4.7uH
2
FM ANT
W200
FM+B
3
AM ANT
SW
Q201
R200
Q503
Q150
1K
L6
38
4.7uH
4
NOISE
E-VOLUME
RF GND
BUFFER
MUTE SW
R203
22K
5
FM+B
R202
L7
1K
4.7uH
78
37
6
AM+B
C150
Q150
Q203
7
47u10
Q503
OSC GND
AM+B
8
+
SW
OSC GND
C151
9
0.01
OSC GND
10
OSC GND
11
L8
VT
4.7uH
12
PLL+B
0V
13
IFC OUT
3.5V
14
0V
36
SDA
15
35
SCL
D200
16
DIG GND
3V
0.3V
17
VDD 5V
C209 47u10
18
Q501,
AFC TIME
IF2 GND
+
502
19
CONSTANT SW
IF2+B
C506
20
Q501
0.1
AUDIO OUT
21
32
SD
22
76
S-METER
23
IF1+B
23
C157
IF1 GND
RDS DECODER
150P
Q502
R500 2.2K
62
C156
22K
IC7
0.033
22K
16
R501 2.2K
1
RDCK
6
QUAL
15
R503
R502 2.2K
2
T57
5
RDDA
C504 10P
14
1K
C500 10u6.3
OSCO
3
1
5
1
5
0
2.4V
3
8
9
2
Q500
VREF
X2
+
4.3320MHz
C501
330P
2.4V
4
13
C505 10P
L12
MPX
OSCI
4.7uH
5.0V
5
12
OSEL
VCC
0V
6
5.0V
Q500
GND
11
AUDIO
7
EXTRES
OUTPUT
ARI
10
TM
BUFFER
8
FILOUT
+
9
TSEL
0V
R252
47K
ME1 (D40-1136-05)
S3
S2
CN1
FWD
C251
R251
0.047
10K
6
FWD/REV
Ref.99
1
GND
2
5
REV
HEAD R
4
3
Rch
M
3
+
+
+
M1
S1
HEAD COM
4
HD1
C3
2
47u6.3
HEAD L
Lch
5
1
C6
100P
∗
IC1
:
Q49,50,52,57,61,500,503
IC2
: TDA7400D
: 2SC2412K or
IC5
IC3
: HD74HC27FP
2SD601A
IC4
: TDA7384A
Q51,261
: 2SB1443
IC5
: LA3161
Q53
: 2SA1036K
IC6
:
PST9130NR
Q54,58
: DTC144EK or
IC7
:
TDA7479D
UN2213
KRC-15R,179R,25R,279R,281R (E,M) (1/2)
Q55,59,153,352,502
D50
: S2V20 A
: DTA124EK or
D51,405,410 : MA4068(N)-M
UN2112
D52,200
: MA4051(N)-M
Q56,60
: 2SB1655(E,F) or
D53,260,261,350,351,370,371
2SB1565(E,F)
m
:
DSM1SD2 or
Q150
:
DTC124EK or
AM01Z or
UN2212
ERA15-01
Q151,260,353
:
DTC114YK or
D370,
IC1
UNIT NO.
A
D350
R103
R104
R370
D54
: MA4056(N)-M
UN2214
c o
371
UPD780058GCxxx
D55
: MA4091(N)-L
Q201,203,350 : 2SB1277(Q,R)
0-20
YES
YES
NO
NO
YES
NO
UPD780058GC172
D56
: MA4110-L
Q301
: DTA144EK or
2-71
NO
NO
YES
YES
NO
YES
UPD780058GC211
D100,150-152,352
UN2113
2-71
NO
NO
YES
YES
NO
YES
UPD780058GC211
: 1SS133
Q320,351
: 2SA1037K
2-71
NO
NO
YES
YES
NO
YES
UPD780058GC211
D380
:
MA4047-M
Q450,451
: DTC143TK or
2-72
YES
NO
YES
NO
YES
YES
UPD780058GC211
D400,401,404,408,409
UN2216
2-72
YES
NO
YES
NO
YES
YES
UPD780058GC211
:
MA4062-L
Q501
:
DTC114TK or
2-72
YES
NO
YES
NO
YES
YES
UPD780058GC211
UN2215
M
N
O
2SB1565
DTA114EK
DTC144EK
8
2
9
9
ANT
DTA124EK
2SA1036K
DTA144EK
2SC2412K
DTC114TK
DTC114YK
J1
DTC124EK
DTC143TK
2SA1037K
LA3161
2SB1548
2SB1277
2SB1443
4
9
8
2
9
9
PST9130NR
TDA7479D
CAUTION: For continued safety, replace safety critical components
only with manufacturer's recommended parts
(refer to parts
list).indicates safety critical components. For continued protection
against risk of fire, replace only with same type and rating fuse(s). To
T.MUTE
reduce the risk of electric shock, leakage-current or resistance
GND
measurements shall be carried out (exposed parts are acceptably
MOT GND
insulated from the supply circuit) before the appliance is returned to
MOT+B
the customer.
PACK IN
GND
Manufactured under license from Dolby Laboratories.
"Dolby" and the double-D symbol are trademarks
of Dolby Laboratories.
X13-
J1
KRC-15R,179R,25R,279R,281R
2/2
A
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