Kenwood KDC-1028 User manual

© 2005-4 PRINTED IN JAPAN
B53-0270-00 (N)1708
CD RECEIVER
KDC-1028/128/128CR/128/L4
/129/129S/229
KDC-2031SA/SAY/SG/SGY
SERVICE MANUAL
This product uses Lead Free solder.
VOL
AUD
FF
SET UP
SCAN RDM REP
/ AUTO
AME
SWITCH UNIT (X16) TYPE 2
KDC-1028 50106801~ X16-3270-10 X34-3410-11 784225GC283A TDF-51DB/O Y33-2260-63
KDC-128 50200001~ X16-3270-10 X34-3410-12 784225GC283A TDF-51D/O Y33-2260-64
KDC-128CR 50200501~ X16-3270-10 X34-3410-12 784225GC283A TDF-51DCR/O Y33-2260-65
KDC-128/L4 50200001~ X16-3272-71 X34-3410-12 784225GC283A TDF-128/L4O Y33-2260-11
KDC-229 50200001~ X16-3270-21 X34-3650-24 784225GC283A TDF-229/O Y33-2270-65
KDC-129 50200001~ X16-3270-21 X34-3650-25 784225GC283A TDF-229/O Y33-2270-65
KDC-129S 50200001~ X16-3270-21 X34-3650-25 784225GC283A TDF-129S/O Y33-2270-66
KDC-2031SA T0100401~ X16-3272-71 X34-3412-75 784225GC283A TDF-2031SA/O Y33-2280-66
KDC-2031SAY T0200001~ X16-3272-71 X34-3412-75 784225GC283A TDF-2031SA/O Y33-2280-66
KDC-2031SG T0100101~ X16-3270-21 X34-3412-76 784225GC283A TDF-2031SG/O Y33-2280-67
KDC-2031SGY T0200001~ X16-3270-21 X34-3412-76 784225GC283A TDF-2031SG/O Y33-2280-67
Illustration is KDC-1028
MODEL SERIAL No.
ELECTRIC UNIT MCU IC (IC1:X34) TDF NAME TDF PANEL No.
SWITCH UNIT
(TYPE2 UNIT)
This service manual handles only switch unit (X16) for type 2.
Besides, please refer to the service manual of each model.
Switch unit (X16) has been changed from the following serial number to type 2.
Following system microcomputer (IC1:X34) also changes at the same time as changing
switch unit (X16).

2
KDC-1028/128/128CR/128/L4/129/129S/229
KDC-2031SA/SAY/SG/SGY
ABCDE
1
2
3
4
5
6
7
PC BOARD
(COMPONENT SIDE VIEW) (FOIL SIDEVIEW)
Refer to the schematic diagram for the
values of resistors and capacitors.
C64
C63
G
VO
1866 171
VCC
D34
D31
D70
D35
D32
D65
D36
D33
D42
D39
D41
D38
D37
D40
D46
D43
D44
D47
D48
D45
D54
D51
D52
D49
D61
D53
D50 D62
S11 ED1
S12
D64
D63
IC3
EJECT
AUTO
RESET
65321SRCQ
VOL
AUD
ATT 4
SWITCH UNIT
X16-327x-xx (J76-0140-02)
R78
R77
R63
R31
R62
R32
CP11
C12
C11
R81
R80
R19
R17
R16
R82
W6
W5
C61
R95
R59
W13
C15
R11
C68
R13
R15
R14
C10
W11
C69
R70
R98
R75
R74
R97
R68
C66
C22
R67
R96
R58
R60
W14
W12
R84
R85 R83
R86
R64
W2
W3
R65
R33
R90
R88
R91
R89
R87
R18
R61
R22
R21
C21
R94
R23
C62
R93
R34
CLK
REMO
DATAS
KI4
KI3
KS2
KI5
ESD GND
RTRY CCW
TDF DET
CS
ILL D GND
RST
PAN5V
PAN SW5V
FL SW11.25V
LED +B
INT
KS3
KI6 KS1 KS4
KI1
KI2
RTRY CW
FL+B
VFD RST
BE
2
115
14
1281
38
103
3964
102
65
B
E
EB
EB
EB
EB
EB
EB
EB
C65
D75
D73
D74
D72
D71
D77
D76
Q21
J1
Q11
Q10
Q24
Q12
Q13
Q22
Q23
D96
Q25
IC4
SWITCH UNIT
X16-327x-xx (J76-0140-02)
X16-327x-xx
Ref. No. Address
IC3 6B
X16-327x-xx
Ref. No. Address
IC4 4E
Q21 4E
Q22 6E
Q23 6E
Q24 6E
Q25 6D

3
KDC-1028/128/128CR/128/L4/129/129S/229
KDC-2031SA/SAY/SG/SGY
ABCDE
1
2
3
4
5
6
7
X16-327x-xx (1/2)
Q21
D96
J1
D71
D72
D73
D74
D75
D76
D77
∗
A
1/2
J5
X34-
REMOTE
SENSOR
PAN
SW5V
Q24
Q23
Q22
VFD DRIVER
Q25
+B SW
TP32
FL SW11.25V
1
2
34
56
7
8
9
10
11
12
13
14
15
ILL D GND
PAN5V
RTRY CW
LED+B
FL+B
RST
VFD RST
VFD DATAF
VFD CE
VFD CLK
VFD DATAS
REMOTE
RTRY CCW
TDF DET
ESD GND
TP19
TP24
TP22
TP23
TP21
TP20
TP25
TP31
TP30
32
13
12
31
30
15
29
3
6
1
2
3
GND VO VCC
R22 100R21 100K
12
2.2
C21
IC3
FL+B
FL+B
470
R11
470
R13
220
R14
470
R15
470
R16
470
R17
470
R19
1K
∗
R18
P14
32 30 29 31
P9
P10
1GA
34 33 36 35
P12
2G
P11
P13
40 38 37 39
P16 P15
P17
41 43 42
P18 P19
58
P24
47 45 44 46
P21
P20
P22
50 48 49
P23 P36
52 51 53
P25
1GB
P26
54 55 57 56
3G
P27
P29 P28 P33
61 59 60
P31
P30
P32
63 62 64
P35
P34
R80 47
R81 47
1/2W
1/2W
65 66
F+ F+
5
7
6
4
2
3
1
S8
S7
S9
S10 S13
S11
S12
S14
S15
S6
S4
S5 S3
S2
S29
S45 S46
S44
G3
S43
G1
S42
S23 S28
S27
S26
G2
G1
S25
S24
S20
S21
S19 S18
S17
S16
S51
S50 S49 S48
S47
S46 S45
S44
S43
S42
S41
S40 S39 S38
S37
S36 S35
S34
S33
S32
S31
S30 S29 S28
S27
S26 S25
S24
S23
S21
S20 S19 S18
S17
S16
S15
S14
S13
S12
S11
S10
S9
S8
S7
S6
S5
S4
S3
S2
S1
G1
G2
G3
KS1
KS2
KS3
KS4
TP48 TP46 TP49 TP47
TP50 KI1
TP44 TP43 TP51
KI4
KI3
TP45 TP41 KI6
KI5
55
65
SEG46 SEG47 SEG50 SEG49 SEG48 NC SEG51 NC
102
100
101
98 99 96
97
95
SEG36 SEG37 SEG40 SEG39 SEG38 SEG41 SEG42 SEG45 SEG44 SEG43
93
94
91
92
90 88 89 86
87
85 75 SEG26
SEG27 SEG30 SEG29 SEG28 SEG31 SEG32 SEG35 SEG34 SEG33
80 83
84
81
82
78 79 76
77
NC NC SEG19 SEG20 SEG18 SEG21 SEG22 SEG25 SEG24 SEG23
70 73
74
71
72
68 69 66
67
60
SEG17
SEG16
NC
63
64 NC
62
61
SEG12
SEG11
SEG15
SEG14
SEG13
59
58
56
57
37
ROW5
SEG81
SEG76 SEG75
SEG74
NC
2 3 4
SEG80 SEG79
SEG77
SEG78 7
6 5 8 9
INT
VDD
D-GND
SEG82
VDISP 12
11 10 13 14
ROW4
ROW3
ROW1
ROW2 17
16 15 18 19 27 22
COL2
COL1
20 21
COL6
DUP/TRI
COL4
COL3 COL5
23 24 26 25 32
CLOCK
RESET
BLANK
CS
DATA I/O
28 29 31 30
NC NC
L-GND
OSC0
NC
33 34 36 35
VDISP
SEG5
SEG7
SEG6
SEG10
SEG9
SEG8
54
53
50
52
51
SEG1
SEG4
SEG3
SEG2
47
49
48
46
GRID2
GRID3
45
44
GRID1
RST
42
43
NC
D-GND
39
40 NC
41
NC
38
47K
R87
47K
R89
47K
R91 2.2K
R85
2.2K
R84
2.2K
R83
47K
R90
47K
R88
47K
R86
1K
R77
4.7
R74
C10
2.2
R98 47K
C68
470P
1
C69
15
32 29
30
31
27P
C15
10K
R75
R70 220
R93
22K
2.2K
R94
TP26
TP28
TP27
TP29
TP18
TP17
S1
W12
W13
TP70
PAN SW5V
P37 P38 P39 P40 P41
1/2W
R82 47
(7-SEGMENT)
IC3
(X16-3xxx-xx)
ED1
A
IC4
10K
10K
5V
0V
0V
5.0V
0V
11.3V
5.0V
0V
5V
5V
0V
5V
0V
11.3V
0V
0V
11.3V
0V
11.3V
5.0V
0V
5V
0V
0V
11.3V
0V
1b
1c
2b
2c
1a
1d
2a
2g
3h
2d
1h
1m
3G
(2G)(3G) (1GA)
1GB 2G
1n 2n
2m
1f
1e
2f
2e
3b
3c
3a
3g
3d
3n
3m
3f
3e
4h 4b
4c
4a
4d
4n
4m
4f
4e
1k 1j 2j
4g
4j
a
b
c
d
e
fgS11
S3
S5 S4
S7
S9 S8
S10
S6
S1
S2
S1 S1
col
1g
1a 2a 3a 4a

4
KDC-1028/128/128CR/128/L4/129/129S/229
KDC-2031SA/SAY/SG/SGY
JIHGF
1
2
3
4
5
6
7
X16-327x-xx (2/2)
DTA114EE
2SA1774
2SC4081
DA204U
S12
S11
DISP
6
5
4
3
1Q
ATT
2 SRC
EJECT
RESET
D31D32D33
D34D35D36 D37D39 D38
D40D42 D41
D45 D48
D44 D43 D47 D46
D51
D54
D50 D49 D53 D52
∗
D61
∗
D62
∗
D64
∗
D63
∗
D65 D70
D71-77
D31-33,37-39,43-45,49-51,70
D34-36,40-42,46-48,52-54
D61-65
IC3
Q22-24
IC4
∗
B30-1567-05 (COLOR:RED)
∗
UDZS5.6B
2SC4081
DTA114EE
PNA4S22M
ML9228GAZ-A
2SA1774
:
:
:
:
:
:
:
GND LINE
B LINE
ED1 3-BT-223N:
D96 : DA204U
S41
S42
S43
S44
S37
S38
S23
S22
S21
S39
S35
S36
S24
S25
S31
S32
S28
S27
S26
S29
S34
S33
∗
D
∗
C
Q25
Q21 :
:
S1
ESD GND
CP11 10K
25 34 16
VOL
VOL
AUDIO
0.01
C12
3
13
KS2
KS1
KS3
KS4
KI1
KI3
KI4
KI6
470
R31
470
R32
R33
470
R34
470
∗C61 0.01
∗C62 0.01
∗R61
∗C64 0.01 ∗C63 0.01
∗R62
∗C65 0.01
∗R63
∗W2
∗W3
IC3
6
P8
21 18 20 19
F-
P1
F-
25 23 22 24
P3
P2
P4
28 26 27
P6 P5
P7
30 29
31
P9
P10
1GA
12
17
16
14
15 13
5
10
11
9
7
8 6
4
S29
S41
S50
S51
S40 S49
S47
S48 S43
S42
S39 S38
S37
S36 S35 S33
S31
S32
S30 S28
G1
C11
0.01
S51
110
NC 104
103
NC
107
106
105
109
108
SEG53
SEG52
SEG56
SEG55
SEG54
120
115
111
112
114
113
SEG59
SEG58
SEG57
SEG61
SEG60
117
116
119
118
SEG64
SEG63
SEG62
SEG66
SEG65
SEG72
123
122
121
125
124
SEG68
SEG69
SEG67
SEG70
SEG71
128
127
126
SEG73
NC
NC
NC
SEG51
NC
102
101 SEG76
SEG75
SEG74
NC NC 2
1 3 4
SEG77
5
KI5
W5
S34
NC NC P40 P41 P42 P43 NC NC NC NC NC
FM+
AM-
X16-3272-71
KDC-2031SG/SGY
MODEL NAME
KDC-128/CR KDC-1028 KDC-129/S KDC-229 X16-3290-10
X16-3270-10
No.
UNIT
X16-3290-21 X16-3270-21
X16-3312-13
C61-
A
YES
C
YES
D65
B30-1533-05
YES
R18
B30-1567-05
D61-65
B30-1533-05
R61 R62
1K 680
620 560
KDC-2031SA/SAY RDT-101 KDC-128/L4 E202 X16-3292-71
X16-3270-01
X16-3270-02 YES
YES
B30-1575-05 B30-1575-05
B30-1567-05 B30-1729-05 B30-1575-05 620
300
1K 680
300
620
W2
YES
R63
680
560
W3
YES
YES YES
680 620
470
YES
KDC-1028/128/128CR/128/L4/129/129S/229
KDC-2031SA/SAY/SG/SGY(OKI) (2/2)
(1GB)
1GA
ANODE CONNECTION
4b
4c
a
d
g
4j
a
b
c
d
e
fg
S12
S13
S13
S15
S14
S16
P1
P2
P3
P4
P5
P6
P7
P8
P9
P10
P11
P12
P13
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
P32
P33
P34
P35
P36
P37
P38
P39
P40
P41
P42
P43
2b
1b
4a
3a
2a
1a
—
3b
4b
—
—
—
1f
2f
3f
4f
1g
2g
3g
4g
1e
2e
3e
4e
1c
2c
3c
4c
1d
2d
3d
4d
col
—
—
—
—
—
—
—
—
—
—
—
—
—
S1
S2
S3
S4
S5
S6
S7
S8
S9
S10
S11
a
b
f
g
c
e
d
S12
S13
S14
S15
S16
—
—
—
—
—
2b
1b
4a
3a
2a
1a
4m
3m
2m
1m
3b
4b
1h
3h
4h
1f
2f
3f
4f
1g
2g
3g
4g
1e
2e
3e
4e
1k
1j
2j
4j
1c
2c
3c
4c
1d
2d
3d
4d
1n
2n
3n
4n
PIN
NAME 3G 2G 1GA,1GB
CAUTION : For continued
safety, replace safety critical
components only with
manufacturer’s recommended
parts (refer to parts list).
Indicates safety critical com-
ponents. 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 mea-
sured with a high impedance
voltmeter. Values may vary
slightly due to variations be-
tweenindividual instruments
or/and units.

5
KDC-1028/128/128CR/128/L4/129/129S/229
KDC-2031SA/SAY/SG/SGY
Indicates safety critical components.
✽New parts
Parts without Parts No. are not supplied.
Les articles non mentionnes dans le Parts No. ne sont pas fournis.
Teile ohne Parts No. werden nicht geliefert.
Ref. No. A
d
dN
e
wParts No. Description Desti-
nation Ref. No. A
d
dN
e
wParts No. Description Desti-
nation
PARTS LIST
D31-33 B30-1567-05 LED (1608, RED) KE1
D34-36 B30-1533-05 LED (1608, PG) M1
D37-39 B30-1567-05 LED (1608, RED) KE1
D40-42 B30-1533-05 LED (1608, PG) M1
D43-45 B30-1567-05 LED (1608, RED) KE1
D46-48 B30-1533-05 LED (1608, PG) M1
D49-51 B30-1567-05 LED (1608, RED) KE1
D52-54 B30-1533-05 LED (1608, PG) M1
D61-65 B30-1533-05 LED (1608, PG) M1
D61-65 B30-1567-05 LED (1608, RED) KE1
D70 B30-1567-05 LED (1608, RED)
C10 CK73GB0J225K CHIP C 2.2UF K
C11,12 CK73GB1H103K CHIP C 0.010UF K
C15 CC73GCH1H270J CHIP C 27PF J
C21 CK73FB1A225K CHIP C 2.2UF K K
C68 CK73GB1H471K CHIP C 470PF K
C69 CK73FB1C105K CHIP C 1.0UF K
J1 E59-0840-05 RECTANGULAR PLUG (15PIN)
CP11 RK74HB1J103J CHIP-COM 10K J 1/16W
R11 RK73GB2A471J CHIP R 470 J 1/10W
R13 RK73GB2A471J CHIP R 470 J 1/10W
R14 RK73GB2A221J CHIP R 220 J 1/10W
R15-17 RK73GB2A471J CHIP R 470 J 1/10W
R18 RK73GB2A102J CHIP R 1.0K J 1/10W K
R19 RK73GB2A471J CHIP R 470 J 1/10W
R21 RK73GB2A104J CHIP R 100K J 1/10W K
R22 RK73GB2A101J CHIP R 100 J 1/10W K
R31-34 RK73FB2B471J CHIP R 470 J 1/8W
R61 RK73EB2E102J CHIP R 1.0K J 1/4W KE1
R61 RK73EB2E621J CHIP R 620 J 1/4W M1
R62,63 RK73EB2E561J CHIP R 560 J 1/4W M1
R62,63 RK73EB2E681J CHIP R 680 J 1/4W KE1
R70 RK73GB2A221J CHIP R 220 J 1/10W
R74 RK73GB2A4R7J CHIP R 4.7 J 1/10W
R75 RK73GB2A103J CHIP R 10K J 1/10W
R77 RK73GB2A102J CHIP R 1.0K J 1/10W
R80-82 R92-1245-05 CHIP R 47 J 1/2W
R83-85 RK73GB2A222J CHIP R 2.2K J 1/10W
R86-91 RK73GB2A473J CHIP R 47K J 1/10W
R93 RK73GB2A223J CHIP R 22K J 1/10W
R94 RK73GB2A222J CHIP R 2.2K J 1/10W
R98 RK73GB2A473J CHIP R 47K J 1/10W
W2 R92-1252-05 CHIP R 0 OHM J 1/16W M1
W3 R92-1252-05 CHIP R 0 OHM J 1/16W KE1
W5 R92-1252-05 CHIP R 0 OHM J 1/16W
W12,13 R92-1252-05 CHIP R 0 OHM J 1/16W
S12 S70-0106-05 TACT SWITCH
S11 T99-0457-15 ROTARY ENCODER
D71-77 UDZS5.6B ZENER DIODE
D96 DA204U DIODE K
ED1 3-BT-223N
FLUORESCENT INDICATOR TUBE
IC3 PNA4S22M ANALOGUE IC K
IC4
✽ ML9228GAZ-A MOS-IC
Q21 DTA114EE DIGITAL TRANSISTOR
Q22-24 2SA1774 TRANSISTOR
Q25 2SC4081 TRANSISTOR
IC1
✽ 784225GC283A MCU IC
SWITCH UNIT (X16-327x-xx)
ELECTRIC UNIT (X34-341x-xx/3650-2x)
K : KDC-1028, KDC-128, KDC128CR
M1 : KDC-129, KDC-129S, KDC-229
E1 : KDC-128/L4, KDC-2031SA, KDC-2031SAY, KDC-2031SG, KDC-2031SGY

KDC-1028/128/128CR/128/L4/129/129S/229
KDC-2031SA/SAY/SG/SGY
MEMO