Kenwood TK-7160 Service Manual page 50

U
TK-7160/7162
DISPLAY UNIT (X54-3510-10)
J1 E08-0877-05
R1
MBL
SB
100
SURGE
GND
PTT ABSORPTION
ME
D20
MIC
MC2850
HOOK
CM
MIC
18
ME
17
GND
16
PTT
15
HOOK
14
POWER
13
SB
12
8C
11
L1
5C
10
NC
9
TX
8
BUSY
7
BL
6
CM
5
CL
4
CE
3
DI
2
DO
1
CN1 E40-6005-05
DC SW DC SW
Q7 Q8
2SC3928A
2SC3928A
T:3.71V
T:3.74V BUSY:3.71V
T:1.71V
TX
RED LED
D22
B30-2151-05
TX/RX LED
46
X54-351 1/1
V
SCHEMATIC DIAGRAM
A <B
CH CH
UP DN
VOL VOL
UP DN
CP1
R90-0724-05
R21
0
R6
10k
BUSY
GREEN LED
D1 D2
B30-2282-05 B30-2282-05
D3 D4
B30-2282-05 B30-2282-05
D5 D6
B30-2282-05 B30-2282-05
D1-6
KEY BACKLIT
W
KMO1
C>
KMO2
KMO3
S
49
NC
50
KMI3
51
KMI2
52
KMI1
53
NC
54
NC
55
5.01V
NC
56 LCD CONTROLLER
VDD
57 IC1
VDD1 LC75854W
58
VDD2
59
VSS
60
OSC
61
DO
62
CE
63
CL
64
DI
R7 R8
10k
10k
R14
47k
Q1
RN47A4
R17
KEY
BACKLIT SW 39
3.92V 7.84V Q3
KRA225S
R10
R18
330 39
C23
R11
1000p
330
D21
MC2850
DC CONTROLLER
Q4
KRC102S
DC SW
X Y
LCD
32
SEG26
31
SEG25
30
SEG24
29
SEG23
28
SEG22
27
SEG21
26
SEG20
25
SEG19
24
SEG18
23
SEG17
22
SEG16
21
SEG15
20
SEG14
19
SEG13
18
SEG12
17
SEG11
DIMMER
FUNCTION SW
D7 D8 D9
B30-2281-05 B30-2281-05 B30-2281-05
D10 D11 D12
LCD BACKLIT SW B30-2281-05 B30-2281-05 B30-2281-05
Q2
D13 D14 D15
2SB1132(Q,R)
R20
0
B30-2281-05 B30-2281-05 B30-2281-05
D16 D17 D18
B30-2281-05 B30-2281-05 B30-2281-05
D7-18
LCD BACKLIT
0.64V
R28
39
0.64V
R29
39
0.64V
R30
39
0.64V
R31
39