Kenwood KDC-8021 Service Manual page 15

A B
YEL BLK
B.UP GND
16 1
ORG/WHT RED
1
ILLUMI ACC
15 2
BLU/WHT
P. CON
14 3
BLU
ANT CON
13 4
VIOL GRY
12 5
REAR R FRONT R
VIOL/BLK GRY/BLK
11 6
GRN/BLK WHT/BLK
10 7
REAR L FRONT L
GRN WHT
9 8
DC CORD
(E30-4940)
KDC-MP919
YEL BLK
B.UP 16 1 GND
ORG/WHT RED
ILLUMI
2 15 2 ACC
BLU/WHT
14 3 P. CON
EXT. PNK/BLK BLU
ANT CON
13 4
CONT
VIOL GRY
12 5
REAR R FRONT R
VIOL/BLK GRY/BLK
11 6
GRN/BLK WHT/BLK
10 7
REAR L FRONT L
GRN WHT
9 8
DC CORD
(E30-4939)
KDC-X859/X759
3
7 5 3 1
B
8 6 4 2
P.CON
7 5 3 1
A
8 6 4 2
RCA CORD
N-FADER
4
YEL BLK
16 1
ORG/WHT RED
15 2
REAR
BRN BLU/WHT
TEL MUTE
14 3
EXT. PMK/BLK BLU/WHT
ANT CONT
13 4
CONT
P CONT
VIOL GRY
RR+ 12 5 FR+
VIOL/BLK GRY/BLK
RR- 11 6 FR-
GRN/BLK WHT/BLK
FRONT
RL- 10 7 FL-
GRN WHT
RL+ 9 8 FL+
DC CORD
(E30-4942)
KDC-9020R
(E30-4956)
KDC-PSW9521/M9021/8021
5
REMO O-DATA
1 2
4 3
O-CE O-CLK
6
CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list).
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.
7
C D
(X25-91XX-XX)
∗
Q17-22
B
DIFFERENTAL STABILISER
4.5V PRE OUT DC/DC
Q15 L4
4.5V
22uH
IC7
PRE OUT
DC/DC Q16
10.6V
1 8
CONVERTER
BOOST V+ C29
10.4V
AVR 10.6V
22u16
0V 2
CAP+ +
7
0V 3
OSC
GND
6
4
LV
CAP- -10.0V
5
0V VOUT
-10V
J1
L1
B.U.
IC4
POWER IC
GND2
GND
5V
16 1
ILLUM R136 10K 0V
15 0V 1
ACC TAB ST-BY
15 2 2
∗
VCC2
R135 10K
PHONE
14
6.8V 3
P-CON
2 OUT2(-)
14 3 3 GND1
6.8V 5
∗
R134 1K 3 OUT2(+)
EXT CONT
6.8V 7 SVR
13
4 OUT1 (-)
P-ANT
13 4 4 6.8V 9
5 OUT1 (+)
REAR Rch+
3
C112 IN2
FRONT Rch+
12 5 5 0.22u50
6.8V 11
REAR Rch-
IN1
2
0V 13
FRONT Rch-
IN4
11 6 4 PRE-GND
REAR Lch- C113
0.22u50
FRONT Lch- 6.8V 15
10 7 IN3
REAR Lch+ 6.8V 17
AC-GND
OUT3(+)
6.8V 19 GND3
OUT3(-)
FRONT Lch+ 6.8V 21
VCC1
9 8 OUT4 (+)
6.8V 23
OUT4 (-) MUTE
25
DIAGNOSIS GND4
∗
C100 10u16 R190 R184
B
+
82 22K
CN1
IC13
Rch
IC11-13
∗
C109 4.5V PRE OUT
0.1
GND OPE-AMP
10 1 10 1
C99 R189 R183
10u16 82 22K
Lch
+
Lch
9 2 9 2
∗
R191
C107
180
0.1
GND
8 3 8 3
C95 R185 R179
10u16 82 22K
+
Rch
Rch
7 4 7 4
IC11
C108
GND 0.1
6 5 6 5
Lch
C96 R186 R180
10u16 82 22K
∗
+
D25 D
∗
R192
180
∗
R194
D24
180
C98 10u16 R188 R182
R133 +
CN2 82 22K
470
O-CE 4 47
R132
470
O-CLK 3 46
IC12
R131
470
O-DATA 2 45
R130
1K
REMO 1 13
D23
C97 R187 R181
10u16 82 22K
+
∗
R193
180
E F
Q21
R23
R19 47
Q19
47
Q20
Q22
Q18
EXT. AMP
CONT SW
∗
Q29
Q17
2 0V
4
6 14.4V
8 0V
C116
10 6.8V 33u16
+
C114
0.22u50
12 6.8V
14
C111
0.22u50
14 6.8V
R204 10
C118
1u50 R203 4.3K
16 6.8V
+
18 0V
20 14.4V
R200
D31
22 0-4.3V 220
15
24
TH1
0V
R166 C94
360 22u16
+
Q42 Q38-43
AUDIO MUTE SW
4.7K
5
Q43 B.U. 5V AVR
D2
4.7K
3
R165 C93
360 22u16
+
∗
R161 C89 ∗
B
+
360
Q39
4.7K
C86 0.1
C88 0.1
C85 0.1
Q38
C87 0.1
4.7K
R162 ∗
11
360 C90
+
∗
R164 C92
14
+
360
Q40
IC5
4.7K HPF & LPF &
NON-FAD SW
Q41
4.7K
R163 ∗
360 C91
+
indicates
G H
ACC DETECTOR
R42
Q32
D18
47K
POWER-ANT SW
∗
W5
∗
R37 R38
Q24
D17 R40
12K 12K Q31
22K
B.U. DETECTOR
47K
DIMMER
∗
CONTROL SW
2.2K Q23
Q30
47K 10K
47K 47K
31
3
5.0V
Lch MUTE DRIVE Rch MUTE DRIVE
IC9
Q33 Q34
22K 22K MUTE LOGIC
D21 D22
22K 22K
5V
0V
Q8
AUDIO 8V AVR
SW 14V AVR
IC3
R6 C7
Q7
15K 1
Q4
VIN VREF
GND
13.7V 1.24V
Q6,7
AUDIO 8V AVR
ON/OFF SW
0V
Q5
Q6 22K
47K
22K
47K
SW 5V
Q1
Q2
Q3
R2
R4
100
2.2K
26
8.2V
IC5
Q36
28
VCC
4.1V 1
27
AUX1 INL
SDA
4.1V 2
26
AUX1 INR
SCL
3
25 0V
MUTE
DGND
E-VOL MUTE SW
4.1V 4
24 0V
C76
CR1 AGND
5V
23 4.1V 1u50
4.1V 5 0V
CREF
CR2
+
23
SCL
4.1V 6
24
CL1
C77 SDA
0.33u50 25
4.1V 7 22 4.1V C81
NC
CL2 HP FL1
0.33u50
+ 0V 26
4.1V 8 21 1.5V
GND
AUX2 OUTR HP FL2
4.1V 9
C78
AUX2 OUTL
4.1V 10 20 4.1V 0.33u50 C82
HP FLOUT HP FR1 27
0.33u50
19 1.5V + VDD
HP FR2 28
8.2V
4.1V 11 C79 NC
HP FROUT
18 4.1V 0.33u50 C83 4.1V 29
HP RL1 OUT RR
0.33u50
12
17 1.5V + 4.1V 30
OUT REF
HP RL2 OUT RL
4.1V
13
4.1V 31
HP RLOUT C80
OUT FR
0.33u50
16 4.1V C84 4.1V 32
HP RR1
0.33u50 OUT FL
4.1V 14 +
15 1.5V
HP RROUT 33
HP RR2
NC
∗
W4
∗
W3
∗
W2
∗
W1
I J
Q25,28
POWER-CONT SW
Q25
Q27
22K
Q26
22K
R31
D13
22K
Q26,27
Q28 10K
POWER-CONT
PROTECTOR
47K
5V 5V
0V 0V 5V
0V
5V
0V
5V 5V
0V
0V 0V
SERVO AVR
Q9
R9
∗
1.5K
14.4V
A
CD-MECHA 4.7V SW-REG
IC6
0V
NOISE
BUFFER
R154
4.7k
Q37
0V-3.6V
11
NC
5V 10
AM
0V
3.8V 5V 9
0V 0V AFS
8
NC (PHONE+)
7
NC (PHONE-)
IC2 6
NC
5
E-VOL & N.C.MPX CDL
4
CDL OUT
3
CDGND
2
CDR OUT
1
CDR
C64 0.47u50
C63
0.47u50 +
+
D29 D30
24 23
CN3