Icom IC-2820H Service Manual page 45

SECTION 10 VOLTAGE DIAGRAM
10-1 CONTROL UNIT
DS31
R172 R171 R176
FAMG1211F
10K 4.7K 100
R170
G REEN_D1 GO
47K
2SC473 8
Q16
R133
10K
R175 680
RED_D1
47K
R135
2SC4738
R134
Q17
R174 R173
10K
R136
10K 12K
680
LDIAL_A
LDIAL_B
RDIAL_A
RDIAL_B
10k
S5
SKQDPA
L_V/MHz
S6
SKQDPA
L_M/CALL
R220
1k
S11
SKQDPA CPU_RXD
DUP CPU_TXD
S12
SKQDPA
TONE
S13
SKQDPA
LOW
S7
SKQDPA
R_M/CALL F_CE
S8
SKQDPA
R_V/MHz
S10
SKQDPA
SET
S15
LDIAL_A
A
LDIAL_B
B
COM
L_DIAL_SW
SW-169
Left
R78
PWR_SW
10K
S16
RDIAL_A
A RESET
RDIAL_B
B
COM
R_DIAL_SW
CPU_TXD
SW-169
Right
2820̲A3format.indd 14-15
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DS32 DS33 DS34 DS35
FAMG1211F FAMG1211F
FAMG1211F FAMG1211F
GO GO GO GO
2SC4738 2SC4738 2SC4738
2SC4738 2SC473 8
Q18 Q20 Q22 Q24
R142 R146 R150 R154 R158
680 680 680 680 680
2SC4738 2SC4738 2SC473 8 2SC4738
R141 R145 R149 R153 R157
Q19 Q21 Q23 Q25
10K 10K 10K 10K 10K
R143 R147 R151 R155
680 680 680 680
R72
1M
R41
CR-839
X1 R187
0
P72/clk2/TA1OUT
26
P 71/RXD2/SCL
27
P70/TXD2/SD A
28
P67/TXD1
29
P66/RXD 1
30
P65/CLK1
31
P64/CTS1/RTS1
32
R204 P63/TXD0
33
P62/RXD 0
34
P61/CLK0
47K
35
P60/CTS0/RTS0
36
P57/RDY/CLKOUT
37
P56/AL E
38
P55/HOL D
39
P54/HLDA
R206 40
P53/BCLK
41
47K
P52/RD
42
P51/WRH/BHE
43
P50/WRL/WR
44
P47/CS3
45
P46/CS2
46
P45/CS1
47
P44/CS0
48
P43/A19
49
P42/A18
50
R192
1k
R205
47K
S14
SKQDPA
CPU_RXD
10 - 1
DS36 DS37
FAMG1211F
FAMG1211F
GO GO
2SC4738
Q26 Q28
R162
680
2SC4738 2SC4738
R161
Q27 Q29
10K
R159 R163
680 680
HV
2SC473 8
R13
Q1
/RES
10K D1 2
MA8068
+3.2V
P95/ANEX0/CLK4
100
P96/ANEX1/SOUT4
99
P97/ADTRG/SIN4
98
AVCC
97
R7 6
VREF
96 LVOL
P100/AN 0
95
AVSS 100K
94
P101/AN 1 LSQL
93
P102/AN 2 RVOL
92
P103/AN 3
RSQL
91
P104/AN4/KI0
90 R211 100k
P105/AN5/KI1
89 J4
P106/AN6/KI2
88 B5B-ZR-SM4-TF
P107/AN7/KI3
87
P 00/D 0
86
P 01/D 1
85
P 02/D 2
W1
1
84
R6
P 03/D 3
83 2
10K
P 04/D 4
82 3
R2
P 05/D 5
81 4
P 06/D 6 10K
80 5
P 07/D 7
79
P 10/D 8
78
R210
P11/D 9
77
100k
P12/D10
76
W1
1
R4
RSQL 1
2
2
10K
3
3
1k
R8 4
RVOL
4 5
R191
10K
D0 5
D1
J3
M 30620FCPGP D2
IC13 D3
1k
B5B-ZR-SM4-TF
R190
D4
D5
D6(SCL)
D7(SI)
IC6
+3.2V 5V
5 1
VOUT VDD
2
GND
4 3
NC CE
R1111N321B
2SC4738
IC9
Q31
1 5
R179
OUT CD
2
VDD
3 4
VSS NC 47K
S-80945CNMC
HV
MASTER
A_CS1
LCD_3V
C59 2.2 MSVA
C101 2.2 MSVA
C57 2.2 MSVA
C102 2.2 MSVA
C111 2.2 MSVA
C60 0.22 SV A
C61 0.22 SV A
2SB798 C62 0.22 SV A
Q3 C63 0.22 SV A
C64 0.22 SV A
LCD_3V
+9.3V
2SA1586
LCD_3V
Q15
SLAVE
B_CS1
/RES
A0
W R(R/W)
RD(E)
D0
D1
D2
D3
Q14
D4
2SC4738
D5
D6(SCL)
D7(SI)
VR1 UNIT
R208
100k
1
1
2 2
3 3 R1
4 4
5 5
L1
10U
VR2 UNIT
1
2
3 R1
4
5
R219
C113 C114 C115
47K
0.1 0.1 0.1
IC14
1 8
2 7
3 6
C117 C118 C119 C120
4 5
0.1 0.1 0.1 0.1
TC7W04FU
IC3 TA78L05F
HV
O I
G
C_10_25V_EEE-S_C
5V
IC12
1 5
R25
2
3 4
10K
R2 4
TC7S04F
10K
04-6240-034-001-800
J7
NC
34
FR
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
VDD(3.18V)
16
15 A_VOUT(11.1V)
14 A_CAP5+
13 A_CAP3+
12 A_CAP1-
11
A_CAP1+
10
A_CAP2+
9 A_CAP2-
8 A_CAP4+
7 A_V4 (1.01V)
6 A_V3 (1.98)
5 A_V2 (6.84V)
4
A_V1 (7.82V)
3
A_V0 (8.78V)
2 C86
1 P/ S
0 4-6240-034-001-800
J8
NC
34
33
CL
32
/DO F
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17 VDD(3.18V)
16
C95 2.2 MSVA
15 B_VOUT(8.34V)
14 B_CAP5+
13 B_CAP3+
12
B_CAP1-
11
B_CAP1+
10 B_CAP2+
9 B_CAP2-
R209
8 B_CAP4+
100k
7 B_V4 (1.01V)
6 B_V3 (1.98)
5
B_V2 (6.84V)
4
B_V1 (7.82V)
3 B_V0 (8.78V)
2 C86
LCD_3V
1 P/ S
C116
0.1
J5
EP12 MMZ1608Y102B T TDAT A
4
MMZ1608Y102BT RDAT A
EP11
3
EP10 MMZ1608Y102BT GND
2
EP 9 MMZ1608Y102BT HV
1
HJC0187-010024
*; Refer to "PARTS LIST."
2007/04/02 9:09:06