Kenwood KDC-MP225 Service Manual page 19

P
1
SWITCH UNIT (X16-26xx-xx)
2
3
TP14
J1
4 ESD-GND 15
PANEL SW 14
TP12
SW5V 13
REMO 12
L-DATAS
11
L-CLK 10
L-CE 9
L-DATAL 8
L-RES
7
5
RST 6
LED+B 5
NC 4
ILL-GND 3
PAN 5V
2
D-GND 1
6
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.
7
• DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual
instruments or/and units.
Q
D36
∗
IC2
A
REMOTE
CONTROL
IC
R10
TP13
47
5.0V
+5V
5V
TP11
R11
0V
R9 1K
IC2
TP10
1K
80
R8
TP9
470
79
R7
TP8
470
78
R6
TP7
470
77
R5
TP6
1K
76
S23
TP5
0V
RESET
TP4
+B
TP3
76
R2
TP2
4.7
77
+5V
TP1
78
79
80
R
KDC-MP225,MP4026/G
KDC-W4527/G/GY/Y,W427Y
SW
Q1
10K
10K
65
KI1
KI1
66
KI2
KI2
5V
67 0V
KI3 KI3
5V
68
KI4 0V
KI4
69
KI5
KI5
70
VDD
+5V 5.0V
C3 0.047
71
VDD1
3.3V
C4 0.047
72
VDD2
1.6V
0V 73
VSS
0V 74
TEST
R1 56K
C1
75
OSC
1000P
ON 5V
OFF 0V
5V
76
L-RES
0V
77
L-DATA L
5V 5V
0V 78 0V
L-CE
79
L-CLK 5V
80 0V
L-DATA S
ESD-GND
∗
OFF ∗
Q2
ON
Q3
Q2,3
KEY
ILLUMINATION
SW
+B
S T
IC1
LCD DRIVER
X16-264x-xx/2652-xx (1/2)
40
S40
39
S39
38
S38
37
S37
36
S36
35
S35
34
S34
33
S33
32
S32
31
S31
30
S30
29
S29
28
S28
27
S27
26
S26
25
S25
19