Kenwood KDC-8024 Service Manual page 25

Z
DISPLAY UNIT (X16-2120-10)
1
2
TP21
CN1
3
FL+B 1
TP42
ILL+B 2
FLGND 3 TP20
FLGND 4
FAC2 5
FAC2 6 TP19
FAC1 7
FAC1 8 TP18
TP17
D GND 9
D GND 10
5.0V
PAN5V 11
PAN5V 12 TP16
X25-
TP15
CN5
REMO 13 REMO
4
TP14
1/3
PAN RST 14 34
TP13
ANA 15 ANA
A
TP12
MCREQ 16 95
TP11
SCCON 17 91
TP10
SCREQ 18 89
TP9
SYSTX 19 7
TP8
SYSRX 20 6
TP7
RST 21 21
TP6
DSI 22 22
TP3
E2PDATA 23 23
5
TP5
E2P5V 24 24
TP4
E2PCLK 25 25
TP2
PAN-DET 26 26
ESD GND 27 TP1
ESD GND 28
D8
6
D7
1 2
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
7
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.
AA
GA G1 G2 G3 G4 G5 G6 G7
ED1
50.3V
3.3V REGULATOR
9.4V 5.0V
IC1
ON
5V
OFF
0V 1
5 5.0V
CTL
IN
0V 2
GND
3.3V
R1 C2
TP37
10K 0.01
3 4
NIS OUT
1.3V
Q1
R2
47K
Q1,2
FL+B
Q2 Q4
SW
Q4
R5 R10
FL BLK
47K 2.2K
SW
48 20
D9
CP16
470
D10
3 4 5 6 7 8 9 10 11 12 13
AB
G8 G9 G10 G11 G12 G13 G14 G15 G16
R6
2.2K
D3 D6
C30
0.01
D2 D5
C1
1
D1 D4
3.3V
CP2
100
BUFFER IC
IC2
CP1
100
3.3V
1 16
VCC 0V NC16
2 15
Y1 Y6
5V
0V
3 14
15 A1 A6
3.3V
13
0V NC13
4 12
Y2 Y5
5V
5 11
14 A2 0V A5
6
L5
Y3
600
3.3V
0V 7 10
A3 0V Y4
8 9
GND A4
5V
0V
D14
CP13
D13
10K
TP32 TP33
14 15 16 17 18 19 20
AC
KDC-8024
120X15 Pixel/
G17 G18 G19 G20 G21 G22 G23 G24 G25
C4 R8
2.2 100K
C32
C16
0.047
0.01
BLUE LED SW
R28
D17
R35
100 Q5
10K
0V
IC3
5V
0V
2 1
GND OUT
5.0V
4 3
GND VCC
IC4
SPECTRUM REMOTE
ANALAYZER IC SENSOR IC
IC4
R14
270K
1.3V 1
5V
R02
0V
R15
1.3V 2 18
R01 RST
17
270K
3
F01
LNNF
16
4
F02
15
F03
4
14
LNIN
F04
5
13
1 RENF
F05
6
12
REIN
F06
7
C7 11
RSTC
RELV
10
8
10 5.0V
2 BISC 2.4V
VCC
0V
9
GND
C22
0.01
CP11
4.7K
D11
CP12
4.7K
TP35
21 22 23 24 25 26 27 28 29 30 31
X16-2120-10 (1/2)
AD
120x8 Dot
G26 G27 G28 G29 GB G1
: LIGHT GREENISH
Q3
10K
REMO
ON SW
10K
R11
1K
REMO
R12
100
32
33
34
IC3
CP3
83
100K
X1
72
77
78
79
20.0
80
81
82
R18
10
L3
10uH
S
J1
N.C 1
PAN-DET 2
32 N.C 3
CN2
N.C 4
SDA 5
N.C 6
N.C 7
SCL 8
N.C 9
N.C 10
VDD 11
N.C 12
N.C 13
GND 14
N.C 15
IC
25