Kenwood CX-402A Service Manual page 7

A B
CAUTION: For continued safety, replace safety criti-
cal components only with manufacturer's recom-
mended parts (refer to parts list). indicates safety
critical components. For continued protection against
1
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.
2SB1565 UN5111 2SA1576A
UN5211
2SA1362
2
2SB1277 2SC4081 LM7001JU
2SB1443
3
DTA114EUA
RESET
DTA124EUA
IC10 : BR24C01AF-W
DTC114EUA
IC11 : 703035AYGC-J03
IC20 : BA44W12ST
DTC124EUA
IC21 : S-80841ANNP
IC30 : HA12187FP
IC40 : LM7001JU
IC41 : HA12181FP
IC51 : BA3129F
IC52 : LC75386NE-R
IC90 : TA8275H
Q100,202,401,402
: 2SB1443
Q101-103,105,602
: 2SA1576A
HA12187FP
4 Q104 : DTA114EUA
Q200 : 2SB1565(E,F)
NJM4565MD
Q201,203,206,300,605,
606,900 : 2SC4081(S)
Q207 : UMC3N
Q400 : 2SK536
Q504 : UMG2N
Q510,511 : IMX9
Q600 : 2SB1277
Q601 : DTA124EUA
Q603,604,607
: DTC114EUA
D200,600 : 1SR139-400
DAN202U
D201 : HZS6C3L
D202 : MA4130-H
D203 : MA4110-L
D205-207,601,901
: 1SS133
5 D300,301 : MA4075-L
D400 : IMSA-6801
D401 : DAN202U
D500 : DAP202U
D501 : STZ6.8N
D602,603 : HZS6B1L
D902 : RM10ZLF
DA204U
BR24C01AF-W
ME1
6
(X92-4130-00)
MA142WK
2SK536
BA5917AFP
7
C D
(X14-674x-xx)
MODEL UNIT C100, C101,103,105,500-503, C551,
A400 C539 C548
NAME No. 925-928 505,509-514,915-918 552
CX-402WCVH2 (M)
CX-402W (M) 0-20 W02-3230-05 YES NO 0.15 0.033 4700P
CX-402WACH2 (M)
CX-402A (M)
0-21 W02-3230-05 YES NO 0.15 0.033 4700P
CX-402ACRH2 (M)
CX-402R (M) 0-22 W02-3230-05 YES NO 0.15 0.033 4700P
CX-420 (J)
0-01 W02-3276-05 NO YES 0.033 0.047 2700P
CX-420A (J)
SYNTHESIZER UNIT (X14-674x-xx) (A/2)
+B
+5V
R203 R204
Q200
D200
4.7 4.7 W100
+5V
1/2W 1/2W
+5V
Q100
D205
+B
Q201 R120
47K
P-ON
5V SW
Q200,201
BACK-UP 5V AVR
0/5.0V 26
0/5.0V 27
R125
0/5.0V 28
28
1K 29
30
R208 R209
4.7K 1K 5.0/0V 31
C102 X100
5V
22P 32.768kHz 32
0V
C104
22P
33
IC21
C106 1u50
3.0V 34
+
X101
6.29MHz
35
36
RESET
0V 37
5.0V 38
+5V
39
40
41
42
43
44
45
48
46
5.0/0V 47
+B
5.0/0V 48
48
49
Q204
0/5.0V 50
50
Q202-204
KEY
ILLUMI-
NATION
+B AVR
C208 0.01
Q202
D202
Q203
D206
R215 2.7K
+B
+5V
Q207
Q205-207
LCD
BACK-
LIGHT
+B AVR
+5V
C209 0.01
Q205
D203
Q206
D207
R216 3.3K
1 2 3 4 5 6 7 8 9 10 11 12 13 14
CN10
A
E F
Q101-103, R108,117,127,134,137,139-142,144,171,
C553 D500 IC10 IC51 R170 R533 R555
504,510,511 500-504,506-508,510-520,523,556-559
0.039 NO YES NO NO NO YES 3.9K 3.3K
0.039 NO YES NO NO NO YES 3.9K 3.3K
0.039 NO YES NO NO NO YES 3.9K 3.3K
0.068 YES NO YES YES YES NO 4.7K 2.7K
+B
+5V
+5V
+5V
5V
0V
0/5.0V
0/5.0V
5V
0V
P ANT
P-ON D
P-ON A
N.C.
N.C.
RESET
XT1
32.768kHz
XT2
REGC
X2
IC11
6.29MHz
X1
SYSTEM
u-COM
GND
VDD
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
ILL DET
LCD BL
DIMMER
KEY ILL
5V
0.5V
5V
0.5V
5V 5V
5V
0V 0V
0V
Q104
INDICATOR
LED SW
+5V
+5V
G H
W501-504
YES
SIGNAL LINE
YES
GND LINE
YES
B LINE
+B
NO
+5V
+5V
+5V
5V
0V
R129
100
5V
0V
R131
5V
100 100
0V CD DATA 100
R132 1K
5V 5V 5V 99
PLL CLK 99
0V 0V 0V
5V R133 1K
98
0V PLL DO 98
97
N.C.
∗
R137 1K
96
EPR CLK 96
95
N.C.
∗
5V
94 R139 1K
0V EPR DATA 94
93 R135 1K
PLL CE 93
5V R136 1K
92
0V EV CE
91 0/5.0V
NAVI-R 91
R143 1K
90 5.0V
TEST
∗
89 0/5.0V R140 22K
MUTE-FL 89
∗
88 0/5.0V R142 22K
MUTE-FR 88
∗
87 0/5.0V R144 22K
MUTE-RE 87
86 0/5.0V
NAVI-L
85 0V
N.C.
R146
10K
84 0-5.0V
HEAT
R153
83 0-5.0V 1K R147
HANDLE
620
82 0V
N.C.
R152
1K
81 0/4.0V
AM SD
R151
1K
80 0/4.0V
FM SD 80
0.5-3.0V
79 R150 R157 100K
S METER
1K
78 5.0/0V C113 0.01
0/2.5/5.0V
STEREO
77 0V
N.C. Q105
76 0V
N.C.
R161 100K
C114 0.01
0/2.5/5.0V
78
C117 0.01
R183 100K
Q105
S-METER
OUTPUT
DETECTOR
+5V
+5V
CN11
I J
+B
+5V
∗
R117
100K
∗
R108
100K
5V
0V
∗
IC10
+5V
IC10
EEP
ROM
R138 100K
TEST
∗
Q101
89
89
∗
Q102
88
88
∗
Q103
87
87
81
+5V
Q101
FRONT
Lch
LINE MUTE
Q102
FRONT
Rch
LINE MUTE
Q103
FRONT
L/Rch
LINE MUTE
D501