Kenwood KRC-225 Service Manual page 13

P Q
SWITCH UNIT (X16-1490-XX)
1
1 AUTO
2 CLK
6
2
AUDIO
5
3
J1
PANEL SW 12
R11 100
L DATA S 11
R12 100
L CLK 10
X14-
R13 100
J3
L CE 9
R14 100
L DATA L 8
1/2
N.C. 7
A u-GND 6
4
5.0V
PAN 5V 5
+5V
RST
RST 4
ILL-GND 3
∗
PL2
10.2V
ILL+B 2 +B
D17
∗
5
D14
ESD-GND 1
∗
D12
∗
D9
∗
D6
∗
D4
∗
D1
6
2SB1565 DTA114EK DTC144EK
DTA114YK KRC103S
DTA124EK 2SC2412K
DTA144EK
DTC114YK
DTC124EK
7
DTC143TK
R S
(X16-1490-XX)
VOL- VOL+
KS1
ATT SRC
KS2
T.UP AM
KS3
FM T.DOWN
KS4
4 3
KS5
Q1
Q1
KEY-MATRIX
10K
PERMISSION
SW
10K
64
KI1
63
KI2
62
KI3
61
KI4
0V
R8 4.7
+5V +5V
C2 0.01
C4 0.047
C1 0.047
0V
R21
13
R19 56K
∗
R20
PL1
C5 1000P
0V
13
61
∗
62
D15
R6
63
470
∗
D13 64
R5
5V
470
∗ ∗ 0V
D10 D11
R4
330
∗ ∗
D7 D8
R3
330
∗
D5
R2
∗ ∗ 470
D2 D3
R1
330
2SA1037K
2SB1548 2SB1277
2SB1443
T U
MODEL NAME UNIT NO. ED1 D1-13,15 D14 PL1,2
KRC-235 0-10
B38-1068-05 B30-1565-05 B30-2025-05 B30-1485-05
KRC-265 0-10
B38-1068-05 B30-1565-05 B30-2025-05 B30-1485-05
KRC-225 0-11 B38-1022-05 B30-1565-05 B30-2025-05 B30-1513-05
KRC-265S 0-21 B38-1094-05 B30-1566-05 B30-1511-05 B30-1483-05
GND LINE
IC1 : LC75853NE
B LINE
+B
Q1 : DTA114EK or
UN2111 or
KRA102S
∗
:
D1-13,15
∗
D14 :
D17 : MA3062-M
∗
ED1 :
49
KS6
50
KI1
51
KI2
52
5V
KI3
0V
5V
53
KI4
0V
54
KI5
55
TEST
56
VDD
5.0V
IC1
57
VDD2 3.3V
LCD DRIVER
58
WITH
VDD1
1.7V
59 KEY-MATRIX
VSS
5V
3.3V
60
OSC
5V
61
DATA L
0V
62
CE
63
CLK
64
DATA S
5V
0V
CAUTION: For continued safety, replace safety critical components
KRA102S LA3161
only with manufacturer's recommended parts (refer to parts list).
KRC104S
indicates 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.
V W
∗
ED1 (SEGMENT)
29 S16
16
28 S15
15
27 S14
14
26 S13
13
25 S12
12
24 S37
37
23 S36
36
22 S35
35
21 S34
34
20 S33
33
19 S32
32
18 S31
31
17 S30
30
16 S29
29
32
15 S28
S32 32
28
31
14 S27
S31 31
27
30
13 S26
S30 30
26
29
12 S25
S29 29
25
28
11 S24
S28 28
24
27
10 S23
S27 27
23
26
9 S22
S26
26
22
25
8 S21
S25
25
21
24
7 S20
S24
24
20
23
6
S23 S19
23
19
22
5
S22 S18
22
18
21
4
S21 S17
3.3V 21
17
1.7V 20
3
S20 COM1
20
5V 19
2
S19 COM2
19
0V
18
1
S18 COM3
18
5V
17
0V S17
17
KRC-225/235/265/265S
X Y
∗
ED1 (COMMON)
29 S16
28 S15
27 S14
26 S13
25 S12
24 S37
23 S36
22
S35
21
S34
20
S33
19
S32
18
S31
17
S30
16
S29
15
S28
14
S27
13
S26
12
S25
11
S24
10
S23
9
S22
8
S21
7
S20
6
S19
5
S18
4
S17
3
COM1
CO1
2
COM2
CO2
1
COM3
CO3
KRC-225/235/265/265S (2/2)