![background image](http://html2.mh-extra.com/html/icom/ic-7851/ic-7851_servise-manual_4153040148.webp)
9-5
-12V
820P
C2257
10K
R2206
10
C2313
1
C2249
4.7K
R2022
10
C2251
CR-838
X2161
10K
R2314
10
C2105
10
C2146
1M
R2167
10
C2204
10
C2304
12K
R2248
0.1
C2303
10
C2207
SN74AHC74PW
IC2161
1
1CLR
2
1D
3
1CK
4
1PR
5
1Q
6
1Q
7
GND
8
2Q
9
2Q
10
2PR
11
2CK
12
2D
13
2CLR
14
VCC
ADP2323ACPZ
IC2241
1
PGOOD1
2
SCFG
3
SYNC
4
GND
5
INTVCC
6
RT
7
MODE
8
PGOOD2
9
FB2
10
COMP2
11
SS2
12
TRK2
13
EN2
14
PVIN2
15
PVIN2
16
SW2
17
SW2
18
BST2
19
DL2
20
VDRV
21
PGND
22
DL1
23
BST1
24
SW1
25
SW1
26
PVIN1
27
PVIN1
28
EN1
29
TRK1
30
SS1
31
COMP1
32
FB1
33
33
100 CE-LL
C2011
10
C2144
+3R3V
+3R3V
PWRS
LOGIC-1
100 CE-LL
C2012
10P
C2208
0
R2303
1
C2143
1
C2310
10K
R2001
10K
R2306
SSM3K131TU
Q2242
27K
R2359
39K
R2204
LDTC114EE
Q2322
10
C2225
10
C2224
TC4SU69F
IC2162
1
2
3
4
5
ERBRE1R25V
F2351
1
2
470P
C2307
TC4SU69F
IC2352
1
2
3
4
5
1.8K
R2362
100
R2102
CER8065B-8R2N 8.2U
L2301
33K
R2361
470K
R2123
100
R2122
20K
R2254
100
R2141
10K
R2255
1
C2357
100
R2162
MPZ2012S221A
EP2244
10
C2147
100
R2164
MPZ2012S221A
EP2304
H15V
100
R2163
MIC8V
MPZ2012S221A
EP2305
100
R2161
100K
R2223
+3R3VL
+3R3VL
2.2K
R2311
100
R2201
MPZ2012S221A
EP2243
0.1
C2162
47
C2121
330K
R2224
100
R2222
0.1
C2248
10P
C2228
1
C2241
L2SA1576AR
Q2022
100
R2241
1
C2203
68K
R2305
100
R2301
LRB551V
D2352
MPZ2012S601A
EP2141
100K
R2002
100
R2352
10
C2258
VDD5V
10
C2256
10P
C2148
LG_PWR
47
C2201
18P
C2164
10P
C2108
10
C2127
100K
R2105
1
C2301
10
C2104
SSM3K131TU
Q2241
SLF6028T-100M1R3-PF 10U
L2221
LDTC114EE
Q2012
10P
C2359
MPZ2012S601A
EP2221
MPZ2012S601A
EP2302
VDD1R5V
MPZ1608S601A
EP2021
MPZ2012S601A
EP2142
0.001
C2021
MPZ2012S601A
EP2121
100
R2356
MPZ2012S601A
EP2102
ADP2384ACPZN
IC2351
1
COMP
2
FB
3
VREG
4
GND
5
SW
6
SW
7
SW
8
PGND
9
PGND
10
PGND
11
PGND
12
PGND
13
PGND
14
SW
15
BST
16
PVIN
17
PVIN
18
PVIN
19
PVIN
20
EN
21
PGOOD
22
RT
23
SYNC
24
SS
25
GND
26
SW
0.1
C2165
100
R2165
10
C2221
100K
R2304
100K
R2011
USB3R3V
3182
MP2301
1
2
3
4
5
6
7
8
9
10
1
C2123
0.1
C2065
10
C2226
SLF7045T-3R3M2R5-PF 3.3U
L2302
10
C2125
MPZ2012S601A
LOGIC UNIT (LOGIC-2)
EP2101
47K
R2251
0.1
C2247
TPS62110RSAR
IC2141
1
PGND
2
VIN
3
VIN
4
EN
5
SYNC
6
LBO
7
LBI
8
VINA
9
AGND
10
FB
11
GND
12
GND
13
PG
14
SW
15
SW
16
PGND
17
10
C2351
TJ50S06M3L
Q2011
0.1
C2355
10
C2305
TPS62110RSAR
IC2121
1
PGND
2
VIN
3
VIN
4
EN
5
SYNC
6
LBO
7
LBI
8
VINA
9
AGND
10
FB
11
GND
12
GND
13
PG
14
SW
15
SW
16
PGND
17
10K
R2357
4.7K
R2024
82K
R2309
100K
R2124
0.1
C2309
MPZ1608S601A
EP2051
10 TMK316BJ 25V
C2361
10
C2205
100K
R2244
100K
R2023
10 TMK316BJ 25V X5R
C2352
3182
MP2101
1
2
3
4
5
6
7
8
9
10
DZ2J047M
D2351
+8V
+15V
10
C2061
4.7K
R2308
820P
C2358
MPZ2012S601A
EP2351
100K
R2321
10P
C2128
MPZ2012S601A
EP2303
15K
R2250
10 TMK316BJ 25V X5R
C2353
18P
C2163
10
C2314
150K
R2125
47
C2141
10
C2243
10
C2206
0.1
C2363
H3R3V
MPZ1608S601A
EP2061
0
R2243
470K
R2103
MPZ2012S601A
EP2222
DB2141300L
D6162
VDD3R3V
R2012
47K
0.01
C2022
39K
R2104
NR10050T 2R9N 2.9U
L2241
10
C2107
3182
MP2201
1
2
3
4
5
6
7
8
9
10
+8V
MPZ2012S601A
EP2242
0.1
C2308
H15V
0.022
C2306
47K
R2003
VDD1R8V
MPZ2012S601A
EP2202
SLF6028T-100M1R3-PF 10U
L2101
10K
R2249
SSM3K131TU
Q2302
4.7
R2021
10
C2064
10
C2227
47
C2101
1
C2223
47K
R2313
VBUS
10
C2124
2SB1132L
Q2021
10
C2222
3.3U
L2351
100K
R2205
R2252
47K
0.1
C2166
TPCF8107
Q2001
1
2
3
45
6
7
8
100K
R2353
10
C2054
10
C2252
47
C2311
10
C2145
1
C2103
100
R2354
470K
R2143
3182
MP2351
1
2
3
4
5
6
7
8
9
10
0.1
C2354
47K
R2322
VDD1R1V
SLF6028T-100M1R3-PF 10U
L2141
10
C2051
SSM3K131TU
Q2301
12K
R2257
0.0015
C2242
H5V
TPS62110RSAR
IC2201
1
PGND
2
VIN
3
VIN
4
EN
5
SYNC
6
LBO
7
LBI
8
VINA
9
AGND
10
FB
11
GND
12
GND
13
PG
14
SW
15
SW
16
PGND
17
MPZ2012S601A
EP2122
J2001
10
C2126
MPZ2012S601A
EP2241
3.3U
L2242
TPS62110RSAR
IC2221
1
PGND
2
VIN
3
VIN
4
EN
5
SYNC
6
LBO
7
LBI
8
VINA
9
AGND
10
FB
11
GND
12
GND
13
PG
14
SW
15
SW
16
PGND
17
SLF6028T-100M1R3-PF 10U
L2201
820P
C2254
MPZ2012S601A
EP2352
10
C2106
MPZ2012S601A
EP2201
TPS62110RSAR
IC2101
1
PGND
2
VIN
3
VIN
4
EN
5
SYNC
6
LBO
7
LBI
8
VINA
9
AGND
10
FB
11
GND
12
GND
13
PG
14
SW
15
SW
16
PGND
17
56K
R2358
10
C2250
39K
R2144
820P
C2253
BT3R0V
68K
R2245
100K
R2145
XC6221A332MR
IC2051
1
VIN
2
VSS
3
CE
4
NC
5
VOUT
27K
R2310
MPZ2012S601A
EP2301
820P
C2302
XC6221A332MR
IC2061
1
VIN
2
VSS
3
CE
4
NC
5
VOUT
TPCF8107
Q2321
1
2
3
45
6
7
8
SHORT1005
CP2166
0.22
C2356
470K
R2203
MPZ2012S601A
EP2223
ADP2323ACPZ
IC2301
1
PGOOD1
2
SCFG
3
SYNC
4
GND
5
INTVCC
6
RT
7
MODE
8
PGOOD2
9
FB2
10
COMP2
11
SS2
12
TRK2
13
EN2
14
PVIN2
15
PVIN2
16
SW2
17
SW2
18
BST2
19
DL2
20
VDRV
21
PGND
22
DL1
23
BST1
24
SW1
25
SW1
26
PVIN1
27
PVIN1
28
EN1
29
TRK1
30
SS1
31
COMP1
32
FB1
33
33
+11V
10K
R2323
VDD1R5VB
SLF6028T-100M1R3-PF 10U
L2121
MIC8V
USB3R3V
I5V
H3R3V
VBUS
DCLK2
DCLK2
DCLK2
DCLK
DCLK
DCLK
DCLK#
DCLK#
DCLK#
DCLK2#
DCLK2#
DCLK2#
USB3R3V
-12V
-12V
VDD3R3V
VDD3R3V
VDD5V
VDD5V
I5V
VDD1R5V
VDD1R1V
H5V
+8V
VDD1R8V
+11V
+11V
+3R3V
H3R3V
3.2V
When USB-B connector is used.
3.3
7.9
10.9
3.3
3.3
-11.5
1.1
1.8
1.5
1.5
5.1
3.3
5.0
5.1
TX
RX
Measurement condition:
Frequency: 14.1 MHz
Mode: USB
*No signal is received.
*No modulation on transmitting.
Range
Input impedance
200mV 100
M
Ω
2V
11 M
Ω
20V,200V,1000V 10 M
Ω
RX
Unit
:
V
*:
Refer to the PARTS LIST for the value and name of component.