Voltage Diagram - Icom IC-2800H Service Manual

SECTION 11

VOLTAGE DIAGRAM

CONTROL UNIT
1 8
2 7
R250 1M
3
6
4 5
C107
0.01
IC19
X3
TC7W04FU
CSTCV26.25MXJ040
C158 C159
R271
0.01 0.01
EP2
56
MMZ1608Y102BT
C148 D10
0.01 MA8030 H
97
COREVDD
98
DACP0
99
DACWR#
100
DACRS0
101
DACRS1
102
HRTC
103
VRTC
104
VSS
105
CLK I
106
SUSPEND#
107
TESTEN
108
BUSCLK
109
VSS
110
IOVDD
111
AB20
112 IC8
AB19
113 SED1354F0A
AB18
A17 114
AB17
A16 115
AB16
116
A15
AB15
A14 117
AB14
A13 118
AB13
A12 119
AB12
A11 120
AB11
121
A10
AB10
122
A9
AB9
A8 123
AB8
124
A7
AB7
125
A6
AB6
A5 126
AB5
127
A4
AB4
A3 128
AB3
R178 100k
COMPLETE VIEW
5.21
R220 R206 R208 R215 R217
15k 15k 15k 15k 15k
MD15
MD0
C103
MD14 0.01
R232
R233
100k
100k
64 MD1
MD1
63 MD13
MD13
62 MD2
MD2
61 MD12
MD12
60
MD3
MD3
59 MD11
MD11
58 MD4
MD4 IC9 LH61665AS-60A
57
MD10
MD10
56 MD5 1
MD5 VCC
55 MD9 MD0 2
MD9 I/O1
54 3
MD6 MD1
MD6 I/O2
53 MD8 MD2 4
MD8 I/O3
52 MD7 MD3 5
MD7 I/O4
51 6
MD4
VSS I/O5
50 MD5 7
LCAS# I/O6
49 8
MD6
UCAS# I/O7
48 9
MD7
WE# I/O8
47 10
RAS# NC
46 R231
IOVDD 100k
45
MA9
44 13
MA11 VCC
43 MA8 14
MA8 UW
42 15
MA10 LW
41 MA7 16
MA7 RAS
40 17
MA0 MA0
MA0 A0
39 18
MA6 MA1
MA6 A1
38 MA1 MA2 19
MA1 A2
37 20
MA5 MA3
MA5 A3
36 21
MA2 MA4
MA2 A4
35 MA4 22
MA4 VCC
34
MA3
MA3
33
COREVDD
C104
0.01
R287
10k
DS1 EDTCA22QB0
J1
STH1
24
OEH
23
Q2H
22
CPH1
21
CPH2
20
CPH3
19
GND
18
B
17
G
16
R
15
VB
14
LCD
RL
13
STH2
12
VEE
11
VCOM
10
VGH
9
VDD
8
STV2
7
OEV
6
CPV
5
U/D
4
STV1
3
VSS
2
VGL
1
IC22 TA78L05F
O I
Q1 Q3
13.0
G
2SC4081 R 2SA1576 R
+
C157 5.05
0.22
R31
100
C128
33
1.4
0.34
0.86
R34
R33 22k
—14.5
100
Q2 2SA1576 R
R280
47k
Q5 2SC4081 R
—7.5
R38
100
R279
47k
44
VSS
43 MD15
I/O16
42
MD14
—8
I/O15
41 MD13 R41
R278
I/O14
22k
40 MD12 47k R40
I/O13
39 100
MD11
I/O12
38 MD10
I/O11 Q6
37
MD9
2SA1576 R
I/O10
36
MD8
I/O9
35
NC
32
VSS
R238 10k
31
CAS
FPDAT0 R239 10k
30
OE
29 FPDAT1 R240 10k
NC
28
JP1 FPDAT2
NC
27
MA8
NC
26 MA7 R259 R241 10k
A7
25 10k
MA6 R235
A6
24 390
MA5
A5
23
VSS
JP2
R285 10k
R288 R286
15k 15k
L4
10 H
L3
L1 L2 L5
10 H
10 H 10 H 10 H
R1
4.7k
C17 C18 C19 C20 C21
47p 47p 47p 47p 47p
+
+ + + +
C1 C2 C3 C4 C5 C6 C7 R2 C8 C9 C10 C11 C12 C13 C14 C15
10 0.1 10 0.1 10 0.1 0.1 4.7k 10 0.1 10 0.1 47p 47p
47p 47p
R32
R35
22k
82k
C40
1
—3.1
R276
5.13
0.9 47k
R37
R274
330k
390
R275 R277
47k 47k
Q4 2SC4081 R D11
MA8030 H
Q7 2SA1576 R
R42
R39 L15
—14.5
22k 100k C75 + C76 10 H
0.1 10 R60
100
—14.7
R61
C41
1 100
+ R62
L14
C73 100
C74 10 H
—8
0.1 10
R44
47k
Q8
2SC4081 R
R
G
B
R242 10k
R243 10k
FPDAT3
R246 10k
FPDAT4 R244 10k
R247 10k
FPDAT6
FPDAT5
FPDAT7 R248 10k
C136
R260 R245
150p
10k 10k FPDAT8
C137
R236
150p
R261 R249
390
10k 10k
C138
R237
150p
390
W12
W11
C57
R112 0.1
1
8
10k
2 7
3 6
R3 100
4 5 C56
270p
R4 100
R5 100
IC7 TC7W14FU
R6 100
R7 100
R8 100 13
U/D
14
POL
15
INT/EXT
16
CPV
17
OEV3
18
OEV2
19
C22 OEV1
20
47p
STV
21
OEH
22
OH
23
R9 100
STH
R10 100 24
CPH4
R11 100
R13 100 R12 100
C16
47p
C177
220p
C70 C183
0.01 220p
IC6 M5
C150
0.1
17
B OUT
18
C151
SUB BIAS B
0.1 19
G OUT
20
SUB BIAS R
21
R OUT
22
C184
C152 FRP1 IN
220p 23
0.1
BRIGHT
24
C185
CONTRAST
25
220p
GAM1
26
C133
GAM2
0.1 27
EXT IN R
28
C134
SUB CONT R
0.1 29
EXT IN G
30
C135
SUB CONT B
0.1 31
EXT IN B
32
VCC1
C189
220p
R84 R87
R63
C190 C191 4.67
2.7k 33k
220
220p 220p
R89 C83
R65 C
C71
C80
68k 0.01
33k 0
0.01
0.01
C188 R86 C187 C81 C82
220p 82k 220p 0.01 0.01
BRITV
CONTV
C72 C79 R173
+
220p 470
220p
R255 C101
15k 10