![background image](http://html.mh-extra.com/html/icom/ic-2800/ic-2800_service-manual_612060046.webp)
MW/N
R358
2.2k
R455
82k
R456
47k
R454
82k
R441
10k
C451
10
+
C450
100p
+
—
3
2
1
4
8
R440
100
R439
82k
C447
0.0027
C446
0.1
438
2k
R443
47k
[EUR], [ITA] only
2
R], [ITA] only
R403
1M
R404
2.2k
R405
10k
C433
0.1
R406
22k
R391
1k
C422
0.001
C423 1
R390
470k
R389
2.2k
R380
1k
C413
0.001
C414 1
R378
2.2k
R379
470k
R359
10k
C401
0.1
R360
22k
R357
1M
D68
RB706F-40
D75
DA202U
+
—
3
2
1
4
8
R545
1k
48
0p
C449
82p
VDET
VAF
UAF
VAFO
UAFO
UDET
PSQL
PSEL
R272
10k
C284
1
PSQL
CP-SMV
VSQL
MOD
USQ
1RX
4RX
DATA
CK
PLSTB
VUNLK
UUNLK
8V
HV
VTX
VSHIFT
UMMUTE
VMMUTE
UTX
C5V
LV
STB
VAM
VDET
POWC
3LB
CLONE
R11
33k
R12
470
R13
33k
R85
39k
R203
1.5k Other
3.3k [EUR], [ITA ]
C10
0.001
C13
0.001
C19 1p
C83
22p
C84
30p
C139
47p
C218
0.001
C263
390p
C264
390p
C273
180p
SI
2
CPS
3
RST
4
VCC
5
FIN1
6
LOCK1
7
PD1
8
VT1
9
VF
10
GND
11
VT2
12
PD2
13
LOCK2
14
FIN2
15
OP1
16
OP2
17
XOUT
18
XIN
19
GND
20
XBO
1
5
6
3
L29
0.82 H
L63
680 H
C1
10
+
C2
0.001
D1
1SS355
C3
1
R2
100k
C5
0.001
C4
0.001
R4
10k
L1
0.82 H
R5
2.7k
C6
0.1
+
C7
0.001
C9
0.001
C8
0.001
L2 LB-270
R7
68k
R6
10k
R9
10k
C11
8p
D2 MA77
R10
10k
C12
0.001
R8
220
C15 0.3p
C14
0.3p
D3
HVU350
C17
100p
R15
100
R14
470
C18
0.001
R18 100
C20
0.001
R17
120k
L3
0.22 H
C77
0.22
+
R50
470k
R51
100
R49
470k
D19
1SS355
C124
0.001
C74
0.1
+
C73
0.001
C123
0.001
R92
120k
C140
0.001
R87
18k
R86
330
C136
0.5p
L30
8.8nH
R84
330k
C133
0.001
C132
0.001
R83
220k
R82
1k
R77
4.7k
C125
1
C126
0.001
R78
100k
C128
0.001
3
2
1
5
4
C203
0.001
L66
8.2 H
C206
22p
L69
1.8 H
R138
270
R145
270
L47
0.56 H
C223
0.001
R14
C220
0.001
C222
0.001
R144
100k
C221
7p
C216
0.001
R142
33k
C213
0.001
R140
100k
R191
560
D40
MA8047
C249
0.1
X2
CDB450C24
R204
10k
C251
0.022
C252
0.047
C259
1
C258
0.001
C257
0.1
R206
47k
R207
47k
R192
220k
R193
560
R199
470
C260
0.001
R208
1M
R202
47k
R201
1M
R198
8.2k Other
1.5k
[EUR], [ITA]
R210
10k
R213
100k
C271
0.1
1
2
7
8
FI5 CF4WS450HT
1
2
3
4
5
C268
0.1
[EUR], [ITA]
only
R215
100
C274
0.01
C275
0.01
D41
RB706F-40
R214
47k
C269
0.001
R219
120k
C278
47
FI4 ALFY450F=K
1
2
3
4
5
[EUR], [ITA] only
5
6
3
1
7 8
R59
22k
W5
R54
2.2M
R58
2.7k
3
2
1
5
4
W7
R141
270
D30 MA133
C205
0.001
R143 100
L46
1.2 H
L67
8.2 H
C209
2p
R89
47
C142
0.001
R137
820
R538 2.7k
R
3
R530
1.2k
R531 1.5k
C478
0.1
C215
82p
R56
3.9k
R52
2.7k
C76
0.047
+
R529
820
R528
1k
C137 0.5p
R535
1.2k
D21
1SV284
C134
0.75p
R88
330
C135
0.001
X1
CR-549
C210
0.5p
C212
1p
C208
3p
L68
1.8 H
C211
4p
C475
0.001
W10
C219
0.001
W2
W3
R200
47k
C272
0.01
C485
1p
R539
560k
R212
100k
R211
22k
R217
470k
R216
10k
R220
39k
C494
0.3p
C141
0.3p
R534
2.2k
C122
100
+
C270
0.1
C488
0.001
C489
0.001
C484
1
D20
1SV284
C204
0.001
C201
0.001
R79
82k
R80
10k
C207
12p
D28
1SS355
W9
C217
0.001
R139
270
C267
0.1
C254
100p
C477 10
+
C250
47
+
R190
220
C248
0.001
C265
330p
C266
100p Other
150p
[EUR,ITA]
R197
12k
R209
10k
C261 0.1
OSCIN
1
OSCOUT
2
MIXOUT
3
VDD
4
IFIN
5
BIAS
6
FILOUT
7
FILIN
8
AFOUT
9
QUADIN
10
IFOUT
11
SOUT
12
NDET
13
NOUT
14
VSS
15
MIXIN
16
C476 10
+
C481
+
R536
820
C483
0.047
R90 47
C499
0.001
W8
C500
0.001
C480
22p
C491
1
C255
0.001
R205
3.3k
C253
0.033
C200
0.001
W14
W18
C81
33p
C80
5p
C517
100p
[EUR], [ITA] only
R196
10k
R194
39k Other
22k [EUR], [ITA]
W19
except
[EUR], [ITA]
R195
NTCCM16083NH221KC
R546
220
CP5
C82
20p
C127
47p
C487
0.001
C131
0.001
C130
0.047
+
R3
82k
R1
4.7k
C473
0.22
C474
0.22
C490
0.001
D79
1SS355
C214
0.001
C202
0.001
D29
DAN202U
4
VSOUT
W/N
C5V
R81
NTCCM16084LH
[EUR], [ITA] only
[EUR], [ITA] only
except [EUR], [ITA]
except [EUR], [ITA]
[EUR], [ITA]
only
Q87
2SC4081
Q86
2SC4081
Q84
2SC4081
81
SC4081
IC23A
NJM4558M
IC27A
NJM4558M
Q73
DTC144EU
Q60
2SC40
IC7B TC4W66F
Q41
2SC5193
Q52
2SC4116
Q54
2SK1829
Q56
2SC4081
IC7A TC4W66F
Q58
DTA144
EU
Q95
DTC144EU
IC6B TC4W66F
IC6A
TC4W66F
Q59
2SK880
Q57
2SK880
Q55
2SJ144
Q103
DTC144EU
IC28
TA31136FN
Q40
2SC4215
Q21
2SC4228
Q36
Q38
Q39
IC2 M64076AGP
Q2
2SC4213
Q14
DTB123EK
Q22
2SC5085
Q20
2SC4228
Q17
2SC4081
Q19 2SC4213
Q35
Q34
Q99
2SC3324
Q100
2SK880
Q102
2SK880
Q35, 36, 38, 39: DTB123EK
Q37
Q34, 37: UMG9N
Q13
DTC144EU
Q5
2SC5085
Q4
2SC5085
Q6
2SC5085
Q18
2SK880
Q1 2SC4081
Q3 DTC144EU
Q53
DTC144EU
7.87
4.17
4.2
7.87
6.88
1.94
4.92
1.27
4.08
3.88
6.88
7.91
VR 7.87
VR 7.51
VR 1.02
VR 3.50
VR 0.98
VR 0.97
VR 0.75
VR 4.66
VR 0.67
VR 4.74
VR 4.37
VR 0.65
VR 4.37
UR 7.87
VR 1.74
VFM 4.74
VAM 6.59
VR 7.86
VAM 7.08
UV 0.9
VV 0.6
VV 2.2
VV 0.7
UR 0.96
UR 6.8
UV 2.5
UV 0.7
VR