Kenwood TK-90 Service Manual page 109

F
DISPLAY UNIT (X54-3560-20)
L8
10u
L9
10u
SW_8C
5C
DGND1
RST
R:7.91V R:2.39V
T:2.01V T:7.91V
R:0.01V R:4.81V
SW SW
Q9 Q10
T:0.01V
T:4.78V
DTC114EE DTC114EE
TX BUSY
D7
LED
B30-2151-05
BLC1
DIMM
BLC2
RX
TX
PTT/TXD
DM
RXD0
Note : The components marked with a dot (
G
SCHEMATIC DIAGRAM /
76
S76
77
S77
78
S78
79 CoM10/S79
80 CoM9/S80
COM[9]
81
COM[8] CoM8
82
COM[7] CoM7
83 CoM6
COM[6]
84 CoM5
COM[5]
85
COM[4] CoM4
86
COM[3] CoM3
87
COM[2] CoM2
C43
88
COM[1] CoM1
0.01u
89
VDD
C44
90
VLCD
0.01u
91 VLCD0
92 VLCD1
C42
93
VLCD2
0.01u
94
VLCD3
95 VSS
96 oSC
97
RES
98 CE
99 CL
100
DI
L6
10u
R41
R42
R43
R44
14.7456MHz
CP1
RK74GB1J102J
R45
CP2
RK74GB1J102J
R46
LRES
R47
LCS
R48
LCK
R49
LDT
5V
• ) are parts of layer 1.
H
LCD DRIVER
IC4
5.02V
LC75810T-8726
1
NC
2
NC
3
NC
4
NC
5
NC
6
BYTE
7
CNVSS
8
NC
C35
9
NC
10 RST
470 1000p
11
1k
Xout
12
VSS
13 Xin
5.02V
14
VCC1
15
47k
NMI
16
1k
BLC2
17
BLC1
18
DIMM
19
GRE
20
RED
21
10k
NC
22
LCK
23
LDT
24
LCS
25
LRES
470k
470k
470k
470k
I
TK-90
50
S50 S[50]
49
S49 S[49]
48
S48 S[48]
47
S47 S[47]
46
S46 S[46]
45
S45 S[45]
44
S44 S[44]
43
S43 S[43]
42
S42 S[42]
41
S41 S[41]
40
S40 S[40]
39
S39 S[39]
38
S38 S[38]
37
S37 S[37]
36
S36 S[36]
35
S35 S[35]
34
S34 S[34]
33
S33 S[33]
32
S32 S[32]
31
S31 S[31]
30
S30 S[30]
29
S29 S[29]
28
S28 S[28]
27
S27 S[27]
26
S26 S[26]
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
MCU
NC
IC3
NC
30302MAP150GU
VSS
NC
5.02V
VCC2
NC
NC
NC
NC
NC
NC
NC
NC
NC
J
1
2
3
4
75
74
73
72
71
70
69
5
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
6
53
52
51
7
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