Kenwood TK-7160 Service Manual page 51

Z
DISPLAY UNIT (X54-3522-70)
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 BUSY
RED LED GREEN LED
D22
B30-2151-05
TX/RX LED
Note : The components marked with a dot (
AA AB
SCHEMATIC DIAGRAM
KS2
A <B C>
KS3
CH CH
UP DN
KS4
VOL VOL
S
UP DN
5.01V
CP1
R90-0724-05
R21
0
R6 R7 R8
10k 10k
10k
D1 D2
B30-2282-05 B30-2282-05
3.92V 7.84V
D3 D4
R10
330
B30-2282-05 B30-2282-05
D5 D6
R11
330
B30-2282-05 B30-2282-05
D1-6
KEY BACKLIT
• ) are parts of layer 1.
AC
TK-7160/7162
LCD
LCD CONTROLLER
IC1
LC75893M
19
KS2/S16
KS1/S15
20
KS3
21
KS4
22
KI1
23
KI2
24
KI3
25
KI4
26
KI5
27
TEST
28
VDD
29
VDD1
30
VDD2
31
VSS
32
oSC
33
Do
34
CE
35
CL
36
DI
R17
KEY
39
BACKLIT SW
LCD BACKLIT SW
Q3
Q2
KRA225S
2SB1132(Q,R) B30-2281-05
R18 R20
39 0
C23
B30-2281-05
1000p
D21
MC2850
DC CONTROLLER
Q4
KRC102S
DC SW
AD
18
17
CoM3
16
CoM2
15
CoM1
14
S14
13
S13
12
S12
11
S11
10
S10
9
S9
8
S8
7
S7
6
S6
5
S5
4
P4/S4
3
P3/S3
2
P2/S2
1
P1/S1
0.64V
D7 D8 D9
R28
39
B30-2281-05 B30-2281-05
0.64V
D10 D11 D12
R29
39
B30-2281-05 B30-2281-05
D8-12
LCD BACKLIT
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