Kenwood KRC-594 Schematics
A B C D E
1
2
3
4
5
6
7
4.7K
4.7K
4.7K
4.7K
4.7K
22K
22K
4.7K
47K
10K
0V
2.4V
2.5V
5V
0V
5.0V
0V
5.0V
4.2V
4.1V
7.3V
4.9+V
0V
4.1V
4.1V
4.1V
4.1V
4.1V
0V
3.8V
8.0V
0V
4.1V
4.1V
4.1V
4.1V
0V
5V 3.5V
0V
0V
5V
2.5V
5.0V
5.0V
0V
5.0V
5.0V
IC7
IC2
IC6
(X14-9182-71)
P1
CN1
D157
D151
D152
D158
D154
D153
D155
D160
D165
D162
D161
D164
D163
Q151
S1
Q152
ANT.
∗
A1
J4
Q101
CN2
J3
Q351 Q352
REAR
PRE OUT
Q350
Q201
D203
D311
D310
D309
Q355 Q356
CN3
D307
D304
D302
D301
J2
FRONT
RDS DECODER
∗
E
∗
C
DSI
DRIVER
PANEL
5V SW
COMPOSITE
BUFFER
SIGNAL
PRE
SW
MUTE
SW
MUTE
PRE
E.VOL &
N.C.MPX
NOISE
BUFFER
∗
D
D403
MUTING LOGIC IC
PRE MUTE SW
REM.
CONT
2.2u50
TMARI
4.332MHz
L DATAL
1418
ESD GND
L CLK
NC
L CE
151617
NC
FLIP DET
L DATAS
111213
VOL A
VOL B
EJECT ILL
8910
ILL +B
REMO
RST
EJECT
4567
D GND
PAN 5V
ILL GND
123
C165
0.01
C117
FILOUT
8
FSEL
9
C114
0.01
C115
10u16
C113
27P
R168
1K
C163
∗
C164
10u6.3
0.22
VDD5V
IF1+B
AMIF OUT
AUDIO OUT
RDS OUT
NOISE OUT
IFC OUT
PLL+B
FM+B
AM+B
VT
W/N
FM ANT
RF GND
OSC GND
AM ANT
OSC GND
OSC GND
SCL
SDA
DIG GND
OSC GND
IF1 GND
S-METER
C116
330P
OSEL
VREF
RDDA
QUAL
GND
MPX
7
6
5
4
3
2
1
T57
EXTRES
VCC
OSCIN
OSCOUT
10
11
12
13
14
RDCL
15
16
20
21
24
23
22
C108
0.01
R114
2.2K
C112
27P
R113
2.2K
R112
2.2K
R111
4.7K
100K
R116
C111
1000P
R106
2.2K
10
16
15
17
18
19
12
13
11
14
5
6
8
7
9
2
1
4
3
C104
0.01
C102
0.01
L3
52mH
L6
4.7uH
R104
R105
4.7K
470
R102
470
R101
1K
R103
4.7K
C356
R351C351
0.01
RL
36010u16
+
RR
360
10u16
C352
R352
+
R357
R374
1K
1
2
22K
R355
180
22K
180
R356
R358
0.022
0.01
14
15
C204
C207
R201
10K
C202
C201
1
2.2u35
1
C203
R206
1K
7
22
CDGND
CDR
CASSR
CASSL
CREF
VREF
3
2
1
6
5
4
LFOUT
ACOUTR
ACOUTL
262728
RROUT
LROUT
RFOUT
232425
MPIN
LEVEL
MPX
AM
AFSNCCDL
10
9
8
13
12
11
SCL
SDA
GND
VDD
19
20
21
NC
QUAL
SMUTE
161718
C353
10u16
C354
W3
10u16
C210
C211
47u10
0.01
C303
47u10
C302
0.47u500.1
C208
C206
150P
0.1
R203
4.7K
C212
MPOUT
NC
C301
0.47u50
R359
360
R363
180
R361
22K
C357
0.01
R360
360
R364
R362
22K
180
12 3
R303
100
R302
R307
4.7K
R306
4.7
10
R311
100
R301
10
BU
GND
LXREQM
AGND
LXCON
Rch
RST
Lch
LXDATAM
CLK
10
12
1173
48
216
59
13
FL
+
FR
CHR
CHG
CHL
80
79
81
18
20
AM
FM
5
45
47
X3
76
77
CHL
CHG
CHR
4.7K
R202
0.47
C205
R209 10K
R210 10K
85
84
R205
2.2K
FL
RR
RL
FR
4.7K
R204
R162
R154 470
R155 470
R170 470K
R169 470K
R152 470
R157 1K
R158 1K
R159 1K
R164 47K
R160 2.2K
100K
R171
R153 470
4.7K
R166
47K
R165
+
470K
R167
R304 4.7K
R310 100
R312 100K
R161 2.2M
0.22
C166
56
55
54
30
33
26
59
42
43
44
31
58
51
25
C6
0.01
AOUT BIN1
2
1
3
AIN2
AIN1
AIN3
VCC
82
13
14
12
BOUT
4
5
6
BIN3
BIN2
7
GND
CIN1
CIN2
CIN3
COUT
10
11
9
8
R
L
R117 10
4
27
R207 1K
R208 1K
100K
R414
4.7uH
L10
4.7uH
L8
C106 0.01
4.7uH
L7
+
100K
+
+
+
+
+
+
+
DTC143TUA
UN5114
UN5211
UN5216
2SA1036K
2SA1576A
DTA114EUA
DTA124EUA
DTC114EUA
DTC124EUA
DTC144EUA
2SC5103
2SB1443
2SC4081
UN5212
LB1930M
DA204U
DTA114YUA
X14-9182-71 (1/3)
14
KRC-594/V/Y/YV
F G H I J
10K
10K
22K
22K
0V
8.8V
1.4V
0V
0V
14.4V
0V
0V
0V
0V
0.6V
8.5V
14.4V
5.0V
0V
0V
0V
0V
5.0V
0-5.0V
0-5.0V
0V
5V
5V
2.5V
5V
0V
0V
5V
0V
5V
0V
5V
5V
0V
5V
0V
5V
0V
0V
5V
5.0V
5V
0V
0V
5V
0V
5V
5.0V
5V
0V
5V
0V
5V0V5V
0V
0V
5V5V
0V 0-5.0V
0V
5V
0V
5V
0V
5V
5V
0V
5V
0V
0V
5V
0V
5V
0V
5V
5V
0V
0V
5V
5V
0V
0V
5V
0V
5V
5V
0V
0V
5.0V
0V
5V
2.5V
5V
0V
0V
5V
5V
0V
8.8V 8.8V 8.8V
0.4V0.4V
4.1V
4.1V
4.1V
0.3V
0V
5V
0V
5V
0V
5V
0V
4.0V
0V
5.0V
5.0V
0V
IC1
∗
IC4
IC8
IC1
D401
Q52
Q51
D51
D30804 D303
D258 D254 D252D256
Q54
∗
D31
Q3
D4
Q2
D3
Q1
D2
D1
D269
D257
D271
D270
D251 D255D253
J1
DC-IN SP OUT
NOISE
BUFFER
SYSTEM u-COM
∗
B
∗
B
EQ
AM
MSTC SW
CN6
SUB M
MAIN MOTOR
SW
MAIN MOTOR
SW
RESET IC
POWER
IC
SERGE
ACC DETECTION
BACK-UP
TEL MUTE
DETECTIONDETECTION
3
DETECT
POWER
Q5
ANTENN
D403
C254
R52
1K
1/2W
R410
100K
NC
OU
OU
PG
NC
10
9
8
7
6
R59C53
4700.01
VDD
METAL
55
VOL ANCL RST
PANEL 5V
51
54
53
52
L-DATAS
50
49
48
47
46
45
44
43
PLL CLK
NC
NC
NC
PLL DATA
L-DATAL
NC
L-CLK
42
41
40
39
38
37
36
35
34
33
NC
NC
NC
NC
NC
EQMUTE
MUSIC
DOLBY
RESET
SUB-
SUB+
MOTOR
MODE3
MODE2
MODE1
NCNCNC
ST TYPE1
ST TYPE0
NC
TYPE2
TYPE1
TYPE0
NC
L CE
FLIP DET
NC
DSI
VOL B
69
62
585756
61
60
59
65
64
63
686766
72
71
70
757473
IC2 SDA
R QUAL
R DATA
LX-MUTE
LX-CON
LX-REQM
LX-RST
76
77
78
79
80
82
83
MUTE
AFS
81
IC2 SCL
P-MUTE
P-STBY
ACC DET
PCON-DET
PANT-DET
MS MODE
84
85
86
87
88
NC
89
90
92
93
F/R
91
2122232425
32
31
30
29
28
27
26
R-CLK
KEY-REQ
LX-REQS
EJECT
BU-DET
PANEL DET
REMO
FLASH W
FLASH C
BEEP
7
10
12
13
14
15
1617181920
LX-DATAM
LX-DATAS
LX-CLK
FLASH R
SUB OSC1
SUB OSC1
GND
VDD
MAIN OSC1
MAIN OSC1
VSS
11
DC DET
GND
VREF+
8
9
S-METER
IFC-OUT
NOISE
PHONE
456
VREF-
F REEL
R REEL
123
SW5V
94
95
96
97
98
DAVSS
EN2
EN3
EN1
99
100
DAVDD
R315
C304
0.01
100K
R314
100K
R313
100K
R309
4.7K
R307
4.7K
R311
100
LXMUTE
RST
LXDATAM
LXDATAS
CLK
LXREQS
C256
22u16
R251
33K
R252
47K
C255
0.47u50
0.047
C266
0.047
C264
0.047
C262C260
0.047
L11
4.7uH
R62
2.7K
C56
0.47
LINEOUT2
TCH2
NC22
MSSW
R67
C62
0.1
24
23
22
21
G1FB
MSMODE
DRSW
TAPESW
MUTESW
NRSW
MSOUT
MSTC
20
19
18
NC15
17
16
15
14
13
G2FB
12
11
10
7
TCH1
NC9
MSLPF
8
9
LINEOUT1
C61
0.1
R11
100K
1/2W
R10
22K
0.01
C4
3.3K
R8
R6
10K
R7
22K
C3
1000P
∗
C31
0.01
∗
R31
10K
∗
R32
R3
100K
C2
0.01
DGOUT
DOUT-
DOUT+
COUT-
COUT+
CIN
PGND
AIN
AOUT+
AOUT-
BOUT+
BOUT-
TAB
R256
0.22u50
C252
0.22u50
C251
0.22u50
C253
0.22u50
∗
R262
∗
R260∗R259
∗
R261
C258
1u50
R255
100
21
5
1
3
RR-
FR+
7
RR+
FR-
9
151113
19
17
FL-
FL+
25
23
RL+
RL-
R254
TH1
R257
15K
10K
470
R253
47K
1.5K
C257
0.1
C259
0.047
C261
0.047
C263
0.047
C265
0.047
12
VCC1
PGNDB
STBY
RIP
PGNDA
2
4
6
10
8
BIN
DIN
AUXIN
PGNDC
VCC2
18
16
14
20
22
PGNDD
MUTE
24
C1
3300u16
FL+
FR-
RL+
RL-
FL-
RR-
RR+
FR+
RL+
FL+
8
9
CON
RL-
FL-
FR-
RR-
RR+
FR+
MUTE
P.CON
GND
ACC
6117
10512
43
1413
21
1615
140uH
B.U.
F1 10A
FUSE
RR
FR
RL
FL
24
86
87
81
18
20
19
78
28
R205
2.2K
6
83
4.7K
R204
VSS
2
1
VDD
VOUT
3
4
NC
31
30
43
42
44
26
36
34
35
45
47
27
71
7072737475
81
80
79
78
85
82
83
84
87
86
90
91
92
93
94
96
97
99
98
4
523
8.388MHz
X1
X2
32.768kHz
R422 10K
R266 100K
192018
25
47u6.3
C409
0.01
C410
100K
∗
R411
100K
∗
R416
100K
∗
R420
100K
∗
R421
100K
∗
R417
100K
∗
R412
22P
C407
22P
C408
R83 1K
R82 1K
R81 4.7K
R80 4.7K
R79 10K
R78 4.7K
0.47
C59
10u10
C54 10u10
C55 0.033
R65 220K
R61 47K
33K
R63
4700P
C57
3
MAIN M
4
GND
SUB M+
SUB M-
12
R56 100K
2
1
2
1
0.22
C75
0.22
C74
10K
R51
73
L1
0.1
C406
R310 100
R312 100K
R305 4.7K
R308 4.7K
0.01
C5
10KR520K
R4
82K
R1
∗
R33 47K
R9 33K
Q3
3
4
ANT
TEL
Q2Q1
56K
R2
90
0.1
C7
39K
R15
100K
R16
4.7K
R22
4
220K
R14
92
93
94
35
34
36
1K
R64
59
51
545556
58
33
Q5
C6
0.01
L
R
77
76
24
28
6
7
89
29
7
29 89
R418 100K
R413 100K
Q51
1
2
C58
+
+
+
+
+
+
+
15
X14-9182-71 (2/3)
KRC-594/V/Y/YV
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.
!
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