Schematic Diagram; Display Unit (X54-3480-10) - Kenwood TK-8180 Service Manual Supplement

A
TK-8180

DISPLAY UNIT (X54-3480-10)

1
FKEY[1] FKEY[5]
FKEY[2] FKEY[6]
FKEY[3] FKEY[7]
2
FKEY[4] FKEY[8]
4.97V
POWER
3
4
VOLTAGE
PROTECTION
C910
4.61V
100p
5.02V
J901
8
DM
7
HK
6
MIC
5
ME
7
PTT
3
E
2
SB
1
BLC
13.3V
5
T:0.01V
R:5.02V
VOLTAGE
PROTECTION
6
7
36
X54-348 1/2
B

SCHEMATIC DIAGRAM

CP909
100*2
FKEY[9]
CP908
100*2
FKEY[10]
CP907
100*2
CP906
100*2
FKEY[10]
CP905
FKEY[9]
100*2
FKEY[8]
CP904
FKEY[7]
100*2
FKEY[6]
CP903
FKEY[5]
100*2
FKEY[4]
CP902
FKEY[3]
100*2
FKEY[2]
CP901
FKEY[1]
100*2
VOLTAGE
IC901
REGULATOR/5V
TA78L05F
5.05V
3
1
7.84V
IN OUT
COM
2
Q910
8C SW
12A02CH
7.84V 7.84V
7.10V
8C SW
CONTROL
Q911
DTC114EE
0.01V
Q901 Q902
DTC144EE DTC144EE
Q901,902
HOOK SW
C914
100p
C911
100p
R901
1k
R903
470
R904
D904
1k
DA204U
5.03V
SP2
TX BUSY
INDICATION INDICATION
LED SW LED SW
Q904 Q905
DTC114EE DTC114EE
T:4.80V
TX BUSY
R:0.01V
R:0.01V
BUSY:4.83V
D907
B30-2151-05
TX/BUSY
INDICATION
C
76
S17
77
S16
78
S15
79
S14
80
S13
81
S12
82
S11
83
S10
84
S9
85
S8
86
S7
87
MICROPROCESSOR
S6
88
IC902
S5
30302M8-8Z7GP
89
S4
90
S3
91
S2
92
S1
93
NC
94
AVSS
95
NC
96
VREF
97
AVCC
98
NC
99
NC
100
NC
5.04V
C924
C922
0.01u
10p
C920
100p
X901
L77-1956-05
D905 D906
DA204U DA204U
D904-906
SURGE PROTECTION
BACKLIGHT CONTROL SW
Q909
12A02CH
7.84V
DIMMER SW
Q907
2SC2873(Y)
0.66V
7.10V
R942
0V 47
R943
4.62V
100
Q906
DTC114EE
Q913
DIMMER SW
DTC114EE
CONTROL
BACKLIGHT
CONTROL
D E
50
NC
49
NC
48
NC
47
NC
46
NC
45
TP1
44
NC
43
NC
42
NC
41
NC
40
NC
39
NC
38
NC
37
NC
36
NC
35
NC
R944
34
HK/RXD
0
33
NC
32
NC
31
DM
30
NC
29
PTT/TXD
L909
28
TXD2
L908
27
RXD2
26
NC
D903
MINISMDC020
CURRENT
LIMITER
7.79V
LCD Key
D909-920 D921-930
LCD BACKLIGHT KEY BACKLIGHT
R941
1k
R940
100
LCDRST
LCDCS
LCDCK
LCDDT
SW_8C
5C
RX
TX
RST
ME
PSW
SB
8C