Kenwood KDC-8021 Service Manual page 16

K L
IC10
8 8.2V
VDD
4.1V 1 7 4.1V
0V
4.1V 2 6 4.1V
4.1V 3
0V 4 5 4.1V
GND
SPECTRUM
C48 R61
ANALYZER
10 10K
OPE-AMP
C51
4.7u25
+
31
32
C56
D27 R146
Q35 4.7u25
33
33K
+
34
Q35
SPECTRUM
C45
ANALYZER 32.768kHz
22P
AGC
C46
22P
C47 1
0V
∗
R51 47K
CD 4.7V SW-REG 4.7V
L2
ON/OFF SW 43
220uH
44
∗
R52 100
3.3V 45
∗
R53 100
46
∗
2.4V
R54 100
0V 47
Q10 R48
47K 48
∗
R55
100K
∗
R56
100K
∗
R57
100K
L5
4.7uH
C73
0.01
C74 R156
0.033 10K
4.1V
4.1V
4.1V
4.1V
6
4.1V
4.1V
8
IC15
MOTOR
DRIVE IC
C133
0.22
22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 7 6 5 4 3
CN5
to CD MECHA
to MASK MECHA
M N
IC8
RESET IC
5V
0V 5V
31 0V
EXT-AMP-CONT
32 5V 5V
5V
P-CON 0V 0V
∗
0V
R123 33
5V 5V
ANT-CON
0V 0V
1K
34
5V
RESET
0V
35
XT1
36
XT2
3.4V 37
REGC
X1 38
X2
39
X1
20.0MHz
40
VSS
5.0V 41
VDD
42 3.4V
CLKLOT
0V
43
CD MECHA+B
44 5V
P-ON
0V
45
O-DATA
46
O-CLK
5V
47
O-CE
0V
48
ILL-ON
5V
5V
0V
0V
0 or 5V 49
5V
TYPE0
0V
0 or 5V 50
TYPE1
6
D44 D43
D46
5V
0V
D45
R199
1K
C132
0.22 7.5V
1 5 9
2 6 10
13
3 7 11
4 8 12
2 1
J2
J2 TOP VIEW
13 11 12 8 4 3 2
9 10 6 7 5 1
O P
∗
R113 ∗
E2PROM
100K IC16
∗ R102
R111
100K
1 8 5.0V
100K A0 VDD
5.0V 2 7 0V
A1 TEST
0V 3 6
A2 SCL
4 5
GND SDA
5V
0V
5V
0V
R100 100K
100
SC-DATA
5V L6
99
CH-CLK
5V 5V 0V
98
0V 0V
CH-DATAH
5V 97
5V 5V 5V
0V CH-DATAC
0V 0V 0V 96
R99 100K
N.C
95
N.C
R98 2.2K
94
CD-SW2
5V 93 R97 2.2K
CD-SW1
0V
R96 100K
92
SC-REQ
R95 100K
91
CH-REQC
∗
5V
R94 100K
0V
∗
90
IC1 R-CLK
5V 89
CH-REQH
0V
SYSTEM u-COM
R93 100K
88
CH-MUTE
R92 1K
5V 87
IFC-OUT
0V ∗
R91 100K
86
R-QUAL
∗
R90 100K
5V 85
R-DATA
0V
C49 1000P
84 0-4.3V R89 2.2K
S-METER
5V
83 0-3.0V R88 2.2K
0V
NOISE
82 0V R86
5V
MASK-DET
0V
1K
R87 100K
5V
0V R82
1K
81
MASK-SW3
Q13 FL & ILLUM AVR
R13 2.2
1W
Q14
L3
R14 22uH
Q12
750
Q11
∗
22K A1
48
22K
Q11,12
FL &ILLUM AVR
ON/OFF SW
D50 D51 D52 D53 D54
1 3 5
CN4 2 4 6
Q R
∗
R227
C
90
2.2K
5V
0V RDS DECODER
IC14
R228
2.2K
1 16
86 QUAL RDCL
R229
C153 2.2K 2
15
0.01 85 RDDA R233 C129
TCON
C127 14 2.2K 27P
2.2u50 2.5V OSCO
3
VREF
+
CL
C130
C128
27P
DA 330P 13
2.5V 4
L14 OSCI
104 MPX
DA
4.7uH 5.0V 4.332MHz
5
VDDA
CL
12 5.0V
0V 6
VDDD
DSSA
2.5V 7 11 0V
CIN VSSD
10 0V
SYNC
99
2.5V 8 9 0V
SCOUT MODE
98
97 J3
1
94 L8
93 2
92
3
L9 D49
91
Q46
4.7uH
∗
F/E
90
1
89
RF GND
FM+B SW
2
FM ANT
3
AM ANT
88 Q45
22K
4
OSC GND
87
22K
5
86
FM +B
L10
Q48 4.7uH
6
AM +B
85
C119
0.01 7
OSC GND
84 8
AM+B SW OSC GND
9
83
W/N
Q47
22K
82
5
22K
10
OSC GND
81 11
L11
R85 VT
4.7uH
2.2K 12
PLL +B
13
87 IFC OUT
14
DA SDA
15
CL SCL
16
DIG GND
L12
4.7uH
17
VDD 5V
18
NOISE OUT
104
∗ 19
∗
RDS OUT
R226
Q49
4.7K
COMPOSITE
SIGNAL
BUFFER
20
AUDIO OUT
21
AMIF OUT
22
L13
S-METER
4.7uH
23
IF1 +B
24
IF1 GND
C151
0.01
D61 D60
R241
22K
R240
D55 D56
4.7K
70
Q50
C152
PANEL
0.01
5V SW
C154
7 9 11 13 0.01
8 10 12
KDC-PSW9521/9020R/X759/MP919 (1/2)
KDC-8021/M9021/X859
S T
∗
IC1 :
IC2 : TDA7407
IC3 : M5237ML
IC4 : TDA7560
IC5 : TDA7401
IC6 : SI-8033JD
IC7 : ICL7660SIBA
IC8 : S-80837ANNP
IC9 : TC74HC02AF or
HD74HC02FP
IC10-13 : NJM4565M-TE2
IC14 : SAA6581T
IC15 : LB1930M
∗
IC16 :
Q1,8,13 : KTA1046
Q2,10,14,16,17,20,22,31,
32,35 : 2SC4081
Q3,18,19,21,26 : 2SA1576A
Q4,7,12,27,33,34 : DTA124EUA or
KRA303
Q5,11,36,45,47 : DTC124EUA or
KRC403
Q6,30 : DTC144EUA or
KRC404
Q9 : 2SD2375
Q15 : 2SB1443
Q23,28 : DTC114YUA or
KRC407
Q24,25 : 2SB1277 (Q,R)
Q29 : DTA123JK or
KRA105S
Q37-43,49 : DTC143TUA or
KRC410
Q46,48 : 2SB1188(Q,R)
Q50 : 2SB1427
D1 : 1N5393G-M5
D2 : RB160L-40
D3,9,17 : MA4056(N)-M
D4 : MA4082(N)-L or
HZS9A2L
D5 : SFPB-54V
D6 : MA4100-L
D7 : MA4051(N)-M
D8 : MA4110(N)-M
D10-13,35-42 : 1SR154-400
D14,31-33 : 1SS133
D15 : MA4056-M
D16 : MA4047-M or
HZS5B1
D18 : MA4062(N)-M or
HZS6C2L
D21,22 : DAP202U
D23,24,45,46 : MA3062WA
D25,27,50-56 : DA204K or
KDS226
D29,30,44 : RD6.8M(B2)
D43 : RD6.8MW
D49 : IMSA-6801
D60,61 : DA204U
SIGNAL LINE
GND LINE
B LINE
B LINE
(X16-118X-XX)
MODEL UNIT
NAME No.
KDC-X859 (K)
KDC-9020R (M)
0-10
KDC-X759 (K)
KDC-MP919 (K)
KDC-M9021 (E)
KDC-8021 (E) 2-71
KDC-PSW9521 (E)
SUB-CIRCUIT UNIT
(X16-118X-XX)
J1
15 S.GND
ANA
ANA 13 14
FLGND
FLGND 12 13
X16-
MC CLK 11 12 MC CLK
J1
MC REQ 10 11 MC REQ
2/2
RST 9 10 RST
DATA I/O
DATA I/O 8 9
SC REQ A
SC REQ 7 8
FAC 6 7 FAC
P RST 5 6 P RST
FAC 4 5 FAC
FL+B
FL+B 3 4
DGND 2 3 DGND
VDD 1 2 VDD
1 S.GND
KDC-M9021/8021/X859 (1/2)