Kenwood TK-7160 Service Manual page 46

P
DISPLAY UNIT (X54-3510-10)
J1
R1
MBL
SB
100
GND SURGE
PTT ABSORPTION
ME
D20
MIC
MC2850
HOOK
CM
CN1
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
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
TX-RX UNIT (X57-7080-10)
SPM
AMPSW
Q45,46
DC SW (8T)
Q46
KRC102S
R47
8TC
10k
8R
Q43
Q43,44 12A02CH
DC SW (8R)
8R
R44
Q44
4.7k
KRC102S
VOLTAGE
8RC
REGULATOR/5V
5.01V
5C
1
INT
RESET
SBC
Note : The components marked with a dot (
Q
SCHEMATIC DIAGRAM
A <B
CH CH
UP DN
VOL VOL
UP DN
5.01V
CP1
R90-0724-05
R21
0
R6 R7
10k 10k
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
C293
1u
R:3.13V
R281
4.7k
D42
Q45
1812L110PR
8T
12A02CH
T:7.87V
R46
1.5k 1.1A
CURRENT
PROTECTION
R45
47k
7.98V
VOLTAGE
REGULATOR/8V
IC41
KIA7808AF
7.93V
8C
3 1
R43
OUT IN
47k
COM
2
IC42
NJM78L05UA
3
OUT IN
COM
2
• ) are parts of layer 1.
R
KMO1
C>
KMO2
KMO3
S
49
NC
50
KMI3
51
KMI2
52
KMI1
53
NC
54
NC
55
NC
LCD CONTROLLER
56
VDD
IC1
57
LC75854W
VDD1
58
VDD2
59
VSS
60
OSC
61
DO
62
CE
63
CL
64
DI
R8
10k
R14
47k
DIMMER
FUNCTION SW
Q1
RN47A4
R17
KEY
BACKLIT SW 39
LCD BACKLIT SW
3.92V 7.84V Q3
KRA225S
R10 R18
330
39
C23
R11
1000p
330
D21
MC2850
DC CONTROLLER
Q4
KRC102S
DC SW
AF AMP
AUDIO AMP
IC281
LA4600
10 5
R283 R284 C283
68k 2.2k 0.22u
AF MUTE
Q281
DTC363EU
Q282
KRC102S
AF MUTE
Q41
DC SW (SB)
C52
1000p
13.6V 13.60V
Q41
2SJ645
SB
VOLTAGE
12.6V
REGULATOR/5V
4.97V
5M 1
R105 Q42
KRC102S
1k
IC45
DC SW (SB)
BD4740G
1
NC
2
SUB
3
GND
VOLTAGE
DETECTOR/INT
S
TK-7160
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
D7 D8 D9
B30-2281-05 B30-2281-05 B30-2281-05
D10 D11 D12
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
HOR PA
1
C287
R285
0
470u16
F41
F53-0246-05
4.0A
REVERS
CONNECTION
PROTECTION
IC43
NJM78L05UA
3
OUT IN
COM
2
IC44
BD4740G
5 1
5.77V 5 4.97V
VCC NC VCC
2
SUB
4 3
4
VoUT VoUT
GND
VOLTAGE
DETECTOR/RESET
X57-708 4/4, X54-351 1/1
T
1
2
3
0.64V
R28
39
0.64V
R29
39
0.64V
R30
39
4
0.64V
R31
39
5
CN6
1
2
3
4
5
6
J1
CN5
6
7
43