T
K
M
O
Q
S
L
N
P
R
KRC-478R/RV/RY/RYV
5V
0V
5V
2.3V
2.3V
0V
5.0V
5.0V
0V
4.0V
4.0V
4.7V
7.8V
0V
0V
3.8V
4.8V
3.8V
3.8V
0V
5V
0V
5V
5V
1V
7.9V
4.0V
4.0V
3.8V
3.8V
3.8V
5.7V
2.7V
0V
5V
0V
5V
4.0V
0V
0V
+B LINE
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 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.
1
2
3
4
5
6
7
8
9
10
HEAD R
HEAD COM
HEAD L
GND
F/R
PACK IN
SUB(+)
SUB(-)
8V
MODE
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ACOUTL
ACOUTR
OUTLF
OUTRF
OUTLR
OUTRR
VDD
GND
SDA
SCL
SMUTE
QUAL
MIX OUT
R
MIX OUT
L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
CREF
L
CD R
CD GND
CD L
PH-
PH+
AM
MPX
LEVEL
MP
IN
MP
OUT
8
7
6
5
4
3
2
1
FILOUT
ARI
GND
OSEL
MPX
VREF
RDDA
QUAL
9
10
11
12
13
14
15
16
TSEL
TM
EXTRES
VCC
OSCI
OSCO
TS7
RDCK
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
24
FM ANT
AM ANT
OSC GND
FM+B
AM+B
OSC GND
OSC GND
OSC GND
OSC GND
VT
PLL+B
IFC OUT
SDA
SCL
DIG GND
VDD 5V
IF2 GND
IF2+B
AUDIO OUT
S-METER
IF1+B
IF1 GND
9
8
4
2
1
40
39
38
37
35
34
33
32
21
22
23
27
28
29
11
12
13
15
16
17
18
MUTR
RAI(R)
EQOUT(R)
M-OUT(R)
NFI(R)
RIN(R)
VREF
FIN(L)
RIP
RIN(L)
MSGV (S)
DIN(L)
EQOUT
(L)
MTL
F/R
MUSIC
MSDET
MSI
1500P
C31
1
15K
R303
+
22u6.3
C305
150
R305
R304 15K
C312 1500P
150
R306
22u6.3
+
C306
0.012
C308
R308 330K
+
0.1u50
C309
5.6K
R313
5.1K
R315
R307
330K
C307
0.012
R324 750
24K
R317
0.01
C317
7
9
35
18
C205 1
C204 1
5
6
7
C208 120P
0.22
C207
0.015
C206
4.7K
R205
2.7K
R206
C21
1 150P
C212 0.033
4.7uH
0.01
C202
100u10
C201
+
R208 2.2K
32
R207 2.2K
31
R209 2.2K
62
10u6.3
+
270P
10P
C218
10P
C217
10
R210
10u6.3
C216
+
0.01
C215
22K
R265
180
R267
360
R263
10u16
C261
+
180
R268
360
R264
10u16
C262
+
R266
22K
C260 0.01
1
2
3
2
1
3
+
C263 10u16
R269 360
C264
+
10u16
360
R270
R273 180
R271
22K
22K
R272
R274 180
L8 4.7uH
0.01
C228
4.7K
R219
1K
R218
64
30
77
15
12
14
11
C213
C214
IC8
Q54,55
79
Lch
Rch
4.332MHz
R
PBOUT
(R)
DIN(R)
5
6
7
3
10
S/R (MSGV)
VCC
MAOUT
19
MSGV (R)
20
14
M-OUT
(L)
PBOUT
(L)
RAI (L)
NFI(L)
FIN(R)
1
RF GND
23
SD
24
25
26
30
31
36
47u10
C226
+
0.01
C225
4.7uH
L10
R216
150
22K
R212
22K
R214
1K
R211
L13 4.7uH
76
24
37
1K
R213
25
26
34
1K
R202
4.7K
R203
38
C209 0.082
4.7K
R204
C210 0.1
VREF
1u50
C203
+
23
29
22
R302 180K
0.22u50
C314
+
0.01
C313
0.47u50
C318
+
1.6K
R318
0.1u50
C310
+
1u50
C319
+
R310
12K
R316 5.1K
5.6K
R314
12K
R309
4.7
R301
C302 0.01
C301 100u10
+
R319 100K
R320
470
C315
0.01
R322 100K
0.01
C316
470
R323
R321 22K
L3
41
52mH
0.01
C220
0.01
C229
2.2K
R201
W3
REEL
TAKEUP
HD1
SUPPLY
REEL
2
HEADCOM
PACK IN
8V
10
MODE
5
F/R
6
7
SUB(+)
8
9
SUB(-)
3
4
GND
HEADL
Lch
1
HEADR
PLAY
HEAD
Rch
P
ACK
GND
6
T-END
NC
1
4
GND
2
NC
3
STBY
5
M+B
7
FWD/REV
MODE
SW 5V
C268 0.01
X3
CN1
Q55
Q54
PRE OUT
Lch
J5
Rch
Q57
Q58
1
2
CN3
Q60
Q59
A
Q56
E-VOLUME
AMPLIFIER
BUFFER
MULTIPLEX
DECODER
RDS
AFC
MUTE
PRE OUT
FRONT PRE OUT
J1
X13-
2/2
GND LINE
SIGNAL LINE
J1
ANT
PRE OUT
MUTE SW
Rch
(E30-4801-05)
Lch
D32
Q61
Q62
Q63
Q64
SW
AM+B
FM+B
SW
L9
Q67
NOISE
BUFFER
EQUALIZER
IC1
: UPD780058GC110
IC2
: TDA7400D
IC4
: TDA7384A
IC5
: HA12221F
IC6
: LB1930M
IC8
: TDA7479D
IC9
: PST9130NR
IC10
: HD74HC27FP
Q1,8
: 2SB1443
Q2,7,13,18,19,21,56,67
: 2SC2412K
Q3
: 2SA1036K
Q4,10,14,52,55 : DTA124EK
Q5,11,20,53
: DTC144EK
Q6
: 2SA1648-Z
Q9
: DTC114EK
Q12
: 2SB1184
Q15,65
: 2SA1037K
Q16,63,64
: 2SB1277(Q,R)
Q17,51
: DTC114YK
Q54
: DTC114TK
Q57-60
: DTC143TK
Q61,62
: DTC124EK
D1
: S2V20
D2,7-9,33,36
: AM01Z
D3
: MA4056(N)-M
D4
: MA4091(N)-L
D5
: MA4110-L
D6,13
: 1SS133
D10
: MA4047-M
D32
: MA4051(N)-M
D34,35
: DAP202K
D51
: RD6.8MW
D52-56
: MA4062-L
A
AM+B
SW
Ref.100
P
ACK
Ref.105
Ref.107
STBY
Ref.95
Ref.94
T-END
MAIN
SUB
M
M
M2
Ref.102
M1
FWD/REV
Ref.103
229
D11,12
MA4068(N)-M
:
IC2
IC8
A1
IC5
A
KRC-478R/RV/RY/RYV (E/E/E/E) (1/2)
(D40-1081-25)
ME1
10K
4.7K
4.7K
4.7K
4.7K
22K
22K
22K
22K
22K
22K
DTA114EK
DTA124EK
DTC114EK
DTC114TK
DTC114YK
DTC124EK
DTC143TK
DTC144EK
2SA1036K
2SC2412K
2SD2114K
2SB1184
2SB1277
2SB1443
2SA1037K
LB1930M
TDA7479D
DAP202K
PST9130NR
