© 2003-11 PRINTED IN JAPAN
B53-0115-00 (N) 764
DIGITAL RADIO CONTROLLER
KCA-CM50
SERVICE MANUAL
SR
C
PWR
OFF
SR
CH
/
ME
NU
1
2
3
4
5
6
DISP
Panel assy
(A64-3383-08)
DC cord assy
(E30-6353-08)
Cord with 13P DIN connector
(E30-6354-08)
Magic tape(20x60)
(H30-0501-08)
Clamper
(J11-0647-05) X3
Unit holder
(J19-5236-08)
Magic tape(20x40)
(H30-0585-08)
Cord with 8P DIN connector
(E30-6352-08)
KCA-CM50
2
A
B
C
D
E
1
2
3
4
5
6
7
D6
C10
D9
D1
D7
D10
D12
D13
D14
D15
D16
D2
CN1
LCD1
D11
D8
D4
D3
D5
IC2
C9
19
68
1
43
1
2
CONTROL UNIT
EB
Q2
EB
Q3
D22
R34
C11
R5
R3
C3
R4
C1
R21
R22
R8
R23
R20
R9
R15
R14
R13
R12
R11
C8
R37
R10
R2
R27
C2
C5
C6
R24
C4
C7
R7
R1
R25
R19
R18
R17
R16
R6
BE
Q1
R36
R29
R30
R31
R33
R32
R26
R35
R28
D23
IC1
D20
D21
D19
D18
D17
125
26
50
51
75
76
100
CONTROL UNIT
PC BOARD
(FOIL SIDE VIEW)
Refer to the schematic diagram for the values of resistors and capacitors.
(COMPONENT SIDE VIEW)
CONTROL UNIT
IC
Q
Address
14D
15D
23D
36C
CONTROL UNIT
IC
Q
Address
27C
KCA-CM50
3
J
I
H
G
F
1
2
3
4
5
6
7
BK
YL
C4
C3
C2
R9
R10
R8
R3
R6
J1
41
1
6
L1
R1
R2
C1
R7
R5
5
1
PL1
R4
CN1
CN2
ZD2
D4
D5
D1
D3
IC1
ZD4
D2
ZD1
ZD3
BATT PWB
PC BOARD (FOIL SIDE VIEW)
Refer to the schematic diagram for the values of resistors and capacitors.
DC CORD UNIT
IC
Q
Address
13G
KCA-CM50
4
A
B
C
D
E
1
2
3
4
5
6
7
47K
47K
47K
47K
6.7V
IC1
IC2
CONTROL UNIT
A
CN1
Q2
D19
D18
D17
D21
D20
RESET
SRC
DISP
5
64
3
21
-
VOL+
VOL-
EJECT
D23
D22
Q3
Q1
D13
D15
D9
D11
D5
D7
D4
D10
D12
D16
D14
D8
D6
D1
D2
D3
GND LINE
B LINE
IC1
IC2
:
:
RS-21N
LC75808W
2SD2114K
Q2,3
Q1
:
:
DTA144EK
B30-1564-05
B30-1663-05
D3
D1,2
:
:
B30-1566-05
D4-16
:
DA204K
D17-21
:
D22,23
MA111
:
1/2
UNIT
CN101
MODULATOR
REMO.
SENSOR
LCD DRIVER
1
2
3
4
5
6
7
8
9
GND
OUT
RESET
+6.6V
REMO
RESET
CE
CLK
DATA IN
KS6
74
51
COM8
S57
S52
S51
S53
S55
S56
S54
S60
S58
S59
COM2
COM5
COM7
COM6
COM4
COM3
KS1
KS3
KS2
COM1
COM8
S57
S54
S56
S55
S51
S53
S52
54
53
52
55
56
57
COM9
S59
S58
S60
COM10
59
58
60
61
62
63
COM2
COM4
COM3
COM7
COM6
COM5
64
65
66
69
67
68
KS3
KS2
COM1
KS1
70
71
73
72
KS5
KS4
KS4
KS5
75
REMO-ON P4
S2
S2
30
S46
S50
S49
S48
S47
S43
S45
S44
S42
S41
S35
S40
S39
S38
S37
S36
S32
S34
S33
S31
S30
S40
46
49
S50
S49
50
S48
S47
S46
48
47
S43
S44
S45
45
44
S41
S42
43
42
41
35
38
S38
S39
40
39
S37
S35
S36
37
36
S32
S33
S34
34
33
S30
S31
32
31
S29
S28
S27
S26
27
S29
S27
S28
29
28
S26
26
14
S15
S16
S17
S18
S19
S20
S21
S22
S23
S24
S25
20
23
24
25
21
22
S24
S25
S23
S22
S21
17
18
19
15
16
S20
S19
S18
S17
S16
S15
S3
S4
S5
S6
S7
S8
S9
S10
S11
S12
S13
S14
S8
11
12
13
8
9
10
S14
S13
S12
S11
S10
S9
7
5
6
4
2
3
S5
S7
S6
S4
S3
95
78
KI1
KI2
77
76
KI3
79
R16 1K
KI1
KI2
R18 1K
R17 1K
KI3
KEY-ON P1
KI5
KI4
81
80
P2
ILLMI P3
84
83
82
R19 1K
KI4
90
87
VDD
VLCD
85
86
VLCD2
VLCD1
VLCD0
88
89
VSS
VLCD3
VLCD4
91
92
TEST
OSC
94
93
S1
98
CE
DO
INH
96
97
CL
99
DI
100
1
S1
R22
4.7K
0.1
C5
4.7K
R23
0.1
C6
C7
0.1
C5
4.7K
R24
R25
4.7K
33K
R37
560
R36
R20
43K
580P
C4
R29 470
R30 470
R31 1K
R33 1K
R32 470
100
99
98
96
KI2
KI4
KI3
KI1
KS5
KS4
KS3
KS2
KS1
100
99
98
96
47u16
C9
+
97
97
R27
47K
R26
4.7K
C1 0.1
C2 0.1
C3 0.1
430
R4
270
R5
R15
1K
R14
1K
R13
1K
R12
1K
R11
1K
R6
R7
R8
R9
R10
270
270
270
270
270
10K
R21
2
1
3
4
R34
1K
10u16
C10
+
0.022
C11
R1 330
R2 330
R3 270
10
R28
10
R35
2.2u16
+
C8
LCD
DATA
CONTROL UNIT (1/2)
KCA-CM50
5
J
I
H
G
F
1
2
3
4
5
6
7
CN2
CN1
ZD1
ZD2
ZD4
ZD3
D4
D5
D1
D3
D2
IC1
: BA4910FP
D1,3
: DSK10C-ET1
D2
: SB20-03P
D4,5
: 1SS133
ZD1,3,4
: HZS6C2
ZD2
: MTZJ5.1B
B LINE
GND LINE
1
2
3
4
5
6
3 BATT
2 GND
SHIELD
4 ACC
9 REC C
10 DATA C
1.2MHz
L1
4
3
2
1
BU
3A
F1
F2 3A
ACC
ANT CONT
GND
100
R3
100K
R2
1000P
C1
3.3K
R1
10
R4
R8
10
8.2K
R9
8.2K
R10
22K
R6
R7
10K
R5
22K
1
2
3
5
4
22u25
C2
+
0.47u25
+
C4
22u25
C3
+
1/2W
IC1
DC CORD ASSY
KCA-CM50
CONTROL UNIT (2/2), DC CORD ASSY (1/1)
DTA144EK
2SD2114K
DA204K
LCD1
RDM
REP
SCAN
AB
G
CD
E
F
I
HK
JL
S40
S50
S49
S48
S47
S46
S43
S44
S45
S41
S42
S38
S39
S37
S35
S36
S32
S33
S34
S30
S31
S29
S27
S28
S26
S1
A-a-1
COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8
A-b-1
S2
A-c-1
S3
A-d-1
S4
A-e-1
S5
S6
S7
S8
S9
S10
A-e-2
A-d-2
A-c-2
A-b-2
A-a-2
A-e-3
A-d-3
A-c-3
A-b-3
A-a-3
A-e-4
A-d-4
A-c-4
A-b-4
A-a-4
A-e-5
A-d-5
A-c-5
A-b-5
A-a-5
A-e-6
A-d-6
A-c-6
A-b-6
A-a-6
A-e-7
A-d-7
A-c-7
A-b-7
A-a-7
SCAN
REP
RDM
B-e-6
B-d-6
B-c-6
B-b-6
B-a-6
B-e-1
B-d-1
B-c-1
B-b-1
B-a-1
B-e-2
B-d-2
B-c-2
B-b-2
B-e-3
B-d-3
B-c-3
B-b-3
B-a-2
B-a-3
B-e-4
B-d-4
B-c-4
B-b-4
B-e-5
B-d-5
B-c-5
B-b-5
B-a-4
B-a-5
B-e-7
B-d-7
B-c-7
B-b-7
B-a-7
D-e-6
D-d-6
D-b-6
D-a-6
C-e-6
C-d-6
C-c-6
C-b-6
C-a-6
D-e-1
D-d-1
D-c-1
D-b-1
D-a-1
C-e-1
C-d-1
C-c-1
C-b-1
C-a-1
S20
S19
S18
S17
S16
S15
S14
S13
S12
S11
D-e-2
D-d-2
D-c-2
D-c-3
D-d-3
D-e-3
D-e-4
D-d-4
D-c-4
D-c-5
D-d-5
D-e-5
D-b-2
D-a-2
C-e-2
C-d-2
C-c-2
C-b-2
D-a-3
D-b-3
C-e-3
C-d-3
C-c-3
C-b-3
C-a-2
C-a-3
D-b-4
D-a-4
C-e-4
C-d-4
C-c-4
C-b-4
D-a-5
D-b-5
C-e-5
C-d-5
C-c-5
C-b-5
C-a-4
C-a-5
D-e-7
D-d-7
D-c-7
D-c-6
D-b-7
D-a-7
C-e-7
C-d-7
C-c-7
C-b-7
C-a-7
S27
F-b-7
F-b-5
F-b-4
F-b-3
F-b-2
F-b-1
F-b-6
F-d-6
F-e-6
F-d-1
F-e-1
F-c-1
S30
S29
S28
F-d-2
F-e-2
F-c-2
F-e-3
F-d-3
F-c-3
F-e-4
F-d-4
F-c-4
F-e-5
F-d-5
F-c-5
F-d-7
F-e-7
F-c-7
F-c-6
E-a-6
E-b-6
E-c-6
E-d-6
E-e-6
F-a-6
E-a-1
E-b-1
E-c-1
E-d-1
E-e-1
F-a-1
S22
S26
S25
S24
S23
S21
E-b-3
E-b-2
E-d-2
E-e-2
F-a-2
E-c-2
E-e-3
F-a-3
E-d-3
E-c-3
E-a-2
E-a-3
E-b-5
E-b-4
E-e-4
F-a-4
E-d-4
E-c-4
E-e-5
F-a-5
E-d-5
E-c-5
E-a-4
E-a-5
E-b-7
E-d-7
E-e-7
F-a-7
E-c-7
E-a-7
H-a-6
G-e-6
G-d-6
G-c-6
G-b-6
G-a-6
H-e-6
H-d-6
H-b-6
H-a-1
G-e-1
G-d-1
G-c-1
G-b-1
G-a-1
H-c-1
H-e-1
H-d-1
H-b-1
S38
S39
S40
S32
S33
S34
S35
S36
S37
S31
H-c-2
H-e-2
H-d-2
H-c-3
H-d-3
H-e-3
H-c-4
H-d-4
H-e-4
H-c-5
H-d-5
H-e-5
G-b-2
G-b-3
G-c-2
H-a-2
G-e-2
G-d-2
H-b-2
G-e-3
H-a-3
H-b-3
G-c-3
G-d-3
G-a-2
G-a-3
G-b-4
G-b-5
G-e-4
H-a-4
H-b-4
G-c-4
G-d-4
G-e-5
H-a-5
H-b-5
G-c-5
G-d-5
G-a-4
G-a-5
H-c-7
H-e-7
H-d-7
H-c-6
G-b-7
G-c-7
H-a-7
G-e-7
G-d-7
H-b-7
G-a-7
L-b-6
L-d-6
L-e-6
K-a-6
K-b-6
K-c-6
K-d-6
K-e-6
L-a-6
J-a-6
I-e-6
I-d-6
I-c-6
I-b-6
I-a-6
J-e-6
J-d-6
J-b-6
L-d-1
L-e-1
L-c-1
S60
S59
S58
L-d-2
L-e-2
L-c-2
L-e-3
L-d-3
L-c-3
L-e-4
L-d-4
L-c-4
L-e-5
L-d-5
L-c-5
L-b-1
K-a-1
K-b-1
K-c-1
K-d-1
K-e-1
L-a-1
J-a-1
I-e-1
I-d-1
I-c-1
I-b-1
I-a-1
J-c-1
J-e-1
J-d-1
J-b-1
S57
S56
S55
S54
S53
S52
S48
S49
S50
S51
S42
S43
S44
S45
S46
S47
S41
L-b-2
K-d-2
K-e-2
L-a-2
K-c-2
L-b-3
L-a-3
K-d-3
K-c-3
K-e-3
K-a-2
K-b-2
J-c-2
J-e-2
J-d-2
K-a-3
K-b-3
J-c-3
J-d-3
J-e-3
L-b-4
L-a-4
K-d-4
K-c-4
K-e-4
L-b-5
L-a-5
K-d-5
K-c-5
K-e-5
K-a-4
K-b-4
J-c-4
J-d-4
J-e-4
K-a-5
K-b-5
J-c-5
J-d-5
J-e-5
I-b-2
I-b-3
I-c-2
J-a-2
I-e-2
I-d-2
J-b-2
I-e-3
J-a-3
J-b-3
I-c-3
I-d-3
I-a-2
I-a-3
I-b-4
I-b-5
I-e-4
J-a-4
J-b-4
I-c-4
I-d-4
I-e-5
J-a-5
J-b-5
I-c-5
I-d-5
I-a-4
I-a-5
L-d-7
L-e-7
L-c-7
L-c-6
L-b-7
K-d-7
K-e-7
L-a-7
K-c-7
K-a-7
K-b-7
J-c-7
J-e-7
J-d-7
J-c-6
I-b-7
I-c-7
J-a-7
I-e-7
I-d-7
J-b-7
I-a-7
d
57
b
16
15
2
3
10
11
12
13
6
4
5
7
8
9
14
S1
1
S2
a
S4
S3
S5
b
S8
c
bd
S6
S7
ea
S9
S10
S13
e
cd
S11
S12
a
S14
S15
S1
S2
S4
S5
S3
S8
S7
S6
S9
S10
S13
S12
S11
S14
S15
S37
c
S37
37
36
24
17
18
19
20
21
22
23
25
26
27
28
29
30
31
32
33
34
35
S26
S21
ce
d
S17
S16
S18
b
a
S19
S20
d
ce
S22
S23
ab
S25
S24
c
S29
d
ce
S27
S28
ab
S30
S31
S34
de
S33
S32
ab
S35
S36
S26
S21
S17
S18
S16
S20
S19
S22
S23
S25
S24
S29
S27
S28
S30
S31
S34
S33
S32
S35
S36
56
45
44
38
41
42
43
40
39
54
49
50
51
46
48
47
52
53
55
S42
de
S38
S39
ac
b
S40
S41
e
d
S43
S44
b
ac
S45
S46
d
S49
e
d
S47
S48
b
ac
S50
S51
S54
a
e
S52
S53
bc
S55
S56
S42
S38
S39
S40
S41
S43
S44
S45
S46
S49
S47
S48
S50
S51
S54
S52
S53
S55
S56
65
64
61
60
59
58
62
63
68
67
66
COM7
COM2
ea
S58
S57
S59
COM1
bd
c
S60
2
5
7
6
4
3
COM4
COM3
e
1
COM6
COM5
COM8
COM7
COM2
S58
S57
S59
COM1
S60
COM3
COM4
COM6
COM5
COM8
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.