Kenwood KRC-694/Y, Service Manual

Page: 15 / 26

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
5V
0V 5V
0V
0V
5V 5V
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
0.4V
0.4V
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
1
07
D308 04 D303
D258 D254 D252 D256
Q54
∗
D31
Q3
D4
Q2
D3
Q1 D2
D1
D269
D257
D271
D270
D251 D255 D253
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
DETECTION DETECTION
3
DETECT
POWER
Q5
ANTENN
D403
C254
R52
1K
1/2W
R410 100K
NC
OU
OU
PG
NC
10
9
8
7
6
R59
C53
470
0.01
VDD
METAL
55
VO
L
A
NC L RST P
A
NEL 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+ MO
T
O
R
MODE3 MODE2 MODE1 NC NC NC ST TYPE1 ST TYPE0 NC TYPE2 TYPE1 TYPE0 NC L CE FLIP DET NC DSI VO
L
B
69 62 58 57 56
61
60 59 65 64 63 68 67 66 72
71
70 75 74 73
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
21 22 23 24 25
32
31
30
29
28
27
26
R-CLK
KEY-REQ
LX-REQS
EJECT
BU-DET
P
A
NEL DET
REMO
FLASH W
FLASH C
BEEP
7 10 12 13 14 15 16 17 18 19 20
LX-D
A
T
A
M
LX-D
A
T
A
S
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
4 5 6
VREF-
F REEL R REEL
1 2 3
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
LXD
A
T
A
M
LXD
A
T
A
S
CLK
LXREQS
C256
22u16
R251
33K
R252
47K
C255
0.47u50
0.047
C266
0.047
C264
0.047
C262 C260
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 A
OUT+
A
OUT
-
BOUT+ BOUT
-
TA
B
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
15
11
13 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
PGND
A
2 4 6 10 8
BIN DIN
A
UXIN
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
AC
C
6
11
7
10
5
12
4 3
14 13
2 1
16 15
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
70 72 73 74 75
81
80
79
78
85
82
83
84
87
86
90
91
92
93
94
96
97
99
98
4 5 2 3
8.388MHz X1
X2
32.768kHz
R422 10K
R266 100K
19 20 18
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-
1 2
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
10K
R5
20K
R4 82K
R1
∗
R33 47K
R9 33K
Q3
3 4
ANT
TEL
Q2 Q1
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 54 55 56 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
X14-918x-xx (2/3)
KRC-694/Y
KRC-766
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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