![background image](http://html.mh-extra.com/html/icom/ic-2800/ic-2800_service-manual_612060047.webp)
E
CHASSIS
UNIT
6
5
FV
CP-SMU
8V
C5V
AFOUT
HV
PSQL
CP-SMV
VATTC
UATTC
LV04
LV03
LV02
LV01
FANC
PCTRL
USQL
USOUT
V
AMUTE
UAMUTE
UDET
UAM
V
D
ATA
VCK
SP
R11
33k
R12
470
R13
33k
R29
4.7k
R30
100k
R41
820
R42
1k
R43 22
R47
100
R62 100
R67
100k
R85
39k
R120 18k
R121 100k
R122
10k
R123
47k
R124 22k
R125
100k
R126 820k
R127
27k
R162
33k
R244
120k
R270
1k
C13
0.001
C19 1p
C30
2.2
+
C36
22p
C40
0.001
C42
12p
C44
0.001
C45
0.001
C48
18p
C51
0.001
C55
12p
C64
0.001
C83
22p
C84
30p
C86
5p
C88
0.001
C94
100p
C95
0.001
C97
1p
C98
1p
C102
1p
C103
2p
C105
100p
C106
0.001
C108
0.001
C115
4p
C118
0.001
C139
47p
C145
1.5p
C162
7p
C164
0.001
C191
0.001
C192
0.001
C196
0.001
C197
10
+
C199
0.001
C232
2p
C240
0.001
C273
180p
C279
0.001
C290
0.001
C297
0.01
C358
0.001
D4 MA862
D6
1SS355
D9
UM9401F
D12
HVU350
D15
HVU350
D18
UM9401F
D33
MA77
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
DO
1
LD
2
CLK
3
DI
4
AO1
5
AO2
6
NC
7
GND
8
VSS
9
NC
10
AO3
11
AO4
12
AO5
13
AO6
14
VDD
15
VCC
16
5
6
3
L8
27nH
L9
68nH
L10
47nH
L12
LA-235
L18
0.82 H
L22
68nH
L23
0.56 H
L28
LA-236
L29
0.82 H
L34
33nH
L63
680 H
J8
1
2
C11
8p
R10
10k
1
C15 0.3p
C14
0.3p
U350
C17
100p
R15
100
R14
470
C18
0.001
R18 100
C20
0.001
C21
0.001
R17
120k
L3
0.22 H
C22 27p
C26
1.5p
R23
330
C23
6p
R19
560
R24
47k
R25
47
L4
0.22 H
C24
0.001
C25
5p
C35
15p
L5
47nH
R26
47k
C31
0.001
R27 2.2k
C32
0.001
C34
0.001
C33
0.001
R31
4.7k
R32
100k
R33
150
R35
150
C38
0.001
C37
0.001
R34
39
L6
18nH
C39
2p
R37
1k
R36
4.7k
C41
10p
L7
68nH
R38
22
R39
22
D5
DA221
C43
0.001
C47
22p
C46
10
+
C49
18p
R44
150
L11
LA-235
C52
24p
C53
30p
C54
1p
C56
0.001
C57
0.001
R45
100
C58
1p
C59
1p
C61
0.001
C60
10p
C63
22
+
C66 470p
C65
0.001
L13
LW-25
R46
100
C68
15p
C62
0.001
C69
0.001
C70
18p
C71
30p
C72
27p
L15
LA-244
L78
LA-235
L16
LA-385
R48
82k
C87
0.001
R66
4.7k
R65
10k
L19
0.15 H
R64
180
R63
220
C90
0.001
C91 0.01
C163
0.001
L20
82nH
C99
5p
D11
HVU350
C96
2p
D14
1SS355
C101
2p
R68
100k
C100
39p
R69
100k
C104
5p
L21
82nH
D13
HVU350
C109
0.001
C110
4p
R70
47k
R74
100k
R119
100k
R118
39k
R75
100k
L24
2.2 H
C107
0.001
R71
1k
R73
47k
R72
100
L26
68nH
D16
1SS355
R130
10k
R131
330
R129
56k
R128
27k
C198
0.001
+
—
1
3
4
5
2
R135
150
R136
220k
C189
4p
L43
LA-382
C180
0.001
C182
22
+
C183
0.001
R134
100
C184
0.001
D27
UM9401F
L41
LW-25
C181
470p
R133 22k
C179
0.001
C177
1p
C178
11p
C176
0.001
L40 LA-382
R132 22k
C173
1p C175
0.001
C172
6p
C174
13p
C171
0.001
IN
5
VCC1
4
VCC2
3
VCC3
2
OUT
1
.
6
7
C166
47
+
C165
0.001
L39
15nH
C167
5p
R114
680
C169
2p
C168
2p
R116
4.7k
D24
DA221
R112
22
R110
680
C160
2p
L36
10nH
C161
0.001
R109
22
C159
3p
C158
3p
L35
18nH
R113
22
R111
4.7k
L37
22nH
L38
22nH
R115
820
C465
0.001
R108
47
C157
10p
C156
0.001
R106
680
R105
100k
D22
MA862
D23
MA77
R104
1k
R102
10k
R101 2.2k
C152
2.2
+
R100
47k
C153
10p
C154
10p
R103
270
R153 100
L33
18nH
R107
4.7k
C150
5p
L32
33nH
R98
47k
R99
47
R96
33k
R97
330
L31
27nH
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
L69
1.8 H
R138
270
R173
150
C247
0.001
R176 1.5M
R175
680k
R174
220k
C246
0.001
L54
LA-242
D39
UM9401F
W12
D37
1SS355
C242
0.001
R457
3.3k
C241
0.001
D36
MA862
R172
4.7k
R169
4.7k
R171
100k
R170
100k
D35
1SS355
C239
18p
L52
47nH
R168
47k
R166
100k
R167
39k
C238
0.001
R165
100
C237
0.001
R164
100k
C236
0.001
L51
47nH
C235
2p
C234
0.001
FI3 EFCH435MWNP1
1
2
3 4 5 6 7
8
R157
4.7k
R158
100k
R159
4.7k
L50
33nH
C233
3p
L49
47nH
R156
330
R154 270
C229
0.001
C228
0.001
D32 DAN202U
R150
100k
R151
100k
R152
4.7k
C230
12p
L48
1 H
R149
270
C226
0.5p
R148
390
D31
RB706F-40
C224
0.001
R147
33k
R145
270
L47
0.56 H
C223
0.001
R146 100
C220
0.001
C222
0.001
R144
100k
C221
7p
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
+
R221
220
C276
0.001
FI6 CFWS450F
1
2
3
4
5
R222 560
C277
0.1
D42
MA8047
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
C288
390p
R225
220k
R226
560
C289
390p
R229
10k
R230
470
C285
1
C283
0.001
C282
120p
R458
4.7k
R235
10k
R238
100k
R237
100k
R236
22k
R231
47k
R233
22k
R232
10k
C291
0.001
C281
0.033
R240
47k
D43
RB706F-40
C296
0.01
R239
100
C292
0.1
C293
0.1
C294
0.01
C295
180p
L64
680 H
R241
10k
R242
39k
C365
0.001
C366
0.001
C367
0.001
C350
0.001
C351
10
+
G
I
O
R267
10k
R268
470
C354
0.001
C355
10
+
G
I
O
C356
100
+
C357
0.001
R269 100k
D44
MA8075
L65
0.39 H
C362
2200
+
D46
RD20E
1
2
MF1
+
—
M
C363
0.001
C369
0.001
C360
0.001
C361
47
+
C352
47
+
C353
0.001
C280
0.047
R224 10k
R155
470
C231
0.001
C467
8p
C187
8p
R223 1.5k
L25
0.12 H
C244
6p
D72
HVU131TRF
C368
0.001
J7
C346
0.001
R40
4.7k
W1
R28
2.2k
FI4 ALFY450F=K
1
2
3
4
5
[EUR], [ITA] only
5
6
3
1
7 8
J1
J2
FI2
FL-300
R21
470
R59
22k
C148
6p
R93
15
C144
6p
R95
47
R94
47
R89
47
C143
0.001
C142
0.001
R538 2.7k
R537
3.3k
C117
5p
C116
100p
C137 0.5p
C149
0.001
C147
22p
R535
1.2k
D21
1SV284
C134
0.75p
R88
330
C135
0.001
C28
22p
X1
CR-549
C146
0.001
FI1B FL-288
D7
RB706F-40
D26
RB706F-40
D25
RB706F-40
C210
0.5p
C212
1p
L68
1.8 H
C211
4p
W10
C219
0.001
C225
12p
C227
0.001
W2
W3
C272
0.01
C347
0.001
W4
D8
RB706F-40
C485
1p
R20
47
R22
33k
W16
C78 0.1
C85
1p
C486
0.01
C92
8p
R540
220
L17
0.22 H
R61
820
R539
560k
R212
100k
R211
22k
R217
470k
R216
10k
R220
39k
C188
6p
C190
4p
C493
8p
L42
LA-232
C492
1
C494
0.3p
C141
0.3p
R534
2.2k
C270
0.1
R541
39
C484
1
D20
1SV284
C267
0.1
FI1A FL-288
R209
10k
C481 3.3
+
R536
820
C483
0.047
R90 47
C482 3.3
+
C286 0.1
D10
DAN202U
C480
22p
C245
6p
L44
LA-232
L45
LA-232
C521
0.1
C50
220
+
C491
1
C503
0.001
C29
0.001
W14
W18
C81
33p
R76
3.3k
C80
5p
C522
0.1
C524
0.1
C186
470p
L82
LA-232
C194
0.001
C195
0.001
C193
0.001
C523
0.1
C359
0.1
D45
DSA3A1
C364
47p
C526
0.1
J4
1
2
C121
15p
C113
0.001
C527
0.1
R228
NTCCM16083NH
R227
68k
C151
0.001
C27
0.001
R546
220
CP5
C82
20p
C127
47p
C487
0.001
C131
0.001
C130
0.047
+
C155
0.001
C525
0.1
C520
0.1
C518
0.022
C498
0.001
C513
470p
C514
470p
C512
470p
C501
0.001
C496
0.001
C497
0.001
C502
0.001
C89
100p
R547
22
R60
1.8k
D78
MA77
C529
0.5p
D77
MA77
R234
10k
C466
100p
C119
0.001
R548 47
C114
0.001
D71 1SS355
C531
100p
C112
0.001
C532
470p
C111
0.001
D79
1SS355
R245
470k
D80
1SS355
X3
CDB450C24
4
PTTP
DATAOUT
DATAIN
PTT P
6
4
3
1
2
5
UAF
VA
F
3
4
2
1
IN
VCC1
VCC2
OUT
R117
22
EXT. SP
CLONE I/O
DATA I/O
DC 13.8 V
CHASSIS
UNIT
[EUR], [ITA] only
except [EUR], [ITA]
except [EUR], [ITA]
[EUR], [ITA]
only
C324
0.001
C343
0.1
VIN1
1
VOUT1
2
GND
3
DATA
4
CLK
5
VCC
6
VOUT2
7
VIN2
8
1 2 3 4 5
6 7 8 9 10 11 12
R266
12k
C339
100
+
C338
100
+
C336
220
+
C340
470
+
C341
470
+
C335
47
+
R262
220
R264
4.7
R263
4.7
C344
220
+
C337
47
+
R253
10k
R251
10K
C332
0.47
+
1 2 3
4
5
R250
33k
R252
33k
C333
0.47
+
R261
180
R257
10k
R255
47k
R254
47k
R256 33k
R258 10k
R259 1k
C330 1
+
C331
1
+
C325
0.001
R249
39
L79
12nH
C328
5p
C327
5p
R248
1.5k
C326
2p
L80
10nH
R247
10k
C320
0.001
R246
1k
C322
8p
C321
2p
L81
10nH
C323
0.001
C345
1
C334
0.47
+
R265
680k
R260 10k
C342
0.1
C329
0.001
C528
470p
R179
4.7k
R183
220
C306
18p
C310
22p
C311
2p
L56 22nH
L61
8.2nH
L62
8.2nH
C300
0.5p
C299
0.001
R177 100
L55
22nH
R178
22
C304
0.001
C302
0.001
C303
0.001
R180
120
R182
4.7k
C305
0.001
R181
15k
C307
0.001
C308
0.001
L59
8.2nH
R184 56
R185 56
D70
MA8043
C309
2p
C312
1
C313
0.001
C314
0.001
4
1
2
3
R186
100
C316
3p
R187
15
R188
39k
R189
3.3k
C317
2p
C318
1.5p
C319
1.5p
R526
1k
R527
1k
L60
15nH
C315
0.001
R160
4.7k
C301
7p
C298
0.001
R163
10k
D76
MA77
C530
6P
W11
Q60
2SC4081
IC7B TC4W66F
Q41
2SC5193
Q56
2SC4081
IC7A TC4W66F
Q58
DTA144
EU
Q95
DTC144EU
IC8 TA31136FN
IC6B TC4W66F
IC6A
TC4W66F
Q59
2SK880
Q57
2SK880
Q21
2SC4228
IC2 M64076AGP
Q24
2SC5085
Q23
2SC5193
Q22
2SC5085
Q20
2SC4228
Q101
2SC3324
Q102
2SK880
Q5
2SC5085
Q4
2SC5085
Q6
2SC5085
Q7
2SC5085
Q8
2SC5193
IC1 M67746-01
Q11
2SC3357
Q16
3SK166
IC3 M62354GP
Q10
2SA1362
Q12
2SC2954
Q25
2SC4081
Q15
3SK166
Q9
2SC4081
Q28
2SC3357
IC4 SC-1318
Q29
2SC2954
Q27
2SC5085
Q26
2SA1362
Q44
3SK166
Q42
DTC144EU
Q48
2SC4226
Q49
DTC144EU
Q47
2SC4226
Q50
3SK184
Q43
3SK184
Q61
DTC144EU
Q63
2SC4081
Q62
2SJ144
Q64
2SK880
Q66
DTC144EU
Q67
2SC4081
IC14
TA7808F
Q75
2SB1201
Q71
2SC4213
IC10 M62429FP
Q69
2SC4213
Q70
2SC4213
IC11
TC4S81F
Q65
2SK880
Q74
DTC143XU
IC15 TA7805F
Q76
2SC4081
Q77
2SB1132
IC12 LA4445
Q68
2SC5085
Q30
2SB934P
Q32
DTC143ZU
Q31
2SC4081
IC5
TA75S01F
Q33
2SC4081
Q45
2SC4081
Q46
2SC4081
IC9
PC1676G
Q51
2SC5085
VAM 6.59
VR 7.86
VAM 7.08
UV 0.9
VV 0.6
VV 2.2
VV 0.7
UR 1.69
UR 0.96
UR 6.8
UV 2.5
UV 0.7
UR 0.71
UR 0.97
VR 2.81
UR 4.37
UR 4.37
UR 3.56
UR 4.66
UR 4.77
UR 0.67
UR 0.65
UFM 4.74
VT 7.5
VT 0.9
VT 4.46
VR 7.3
VR 1.3
UT 0.7
UT 8.1
UR 1.13
UT 6.4
UR 6.77
UR 7.28
UR 1.3
UR 7.11
UAM 5.63
UAM 6.28
UFM 0.65
12.96
UR 2.35
4.1
7.87
UR 0
UT 6.8
VR 1.65
UT 1.2
VR 1.65
UR 4.23
UT 0.5
UH 9.0 UHL 6.07
UMH 7.05 UL 5.43
UR 7.8
UR 2.2
VR 1.65
VR 1.65
VT 8.2
VT 6.9
VH 9.4
VMH 6.21
VHL 6.11
VL 4.3
VR 7.85
VR 1.9
VR 2.81
UR 7.88
UR 4.2
UR 3.46
0.63
4.81
4.81
0.63
0.63
13.8
11.65
4.96
UT 1.93
8.3
VT 2.1
U = 430 MHz Band
V = 144 MHz Band
None = COMMON
UH 2.15
UMH 1.82
UHL 1.65
UL 1.55
VH 2.18
VMH 1.77
VHL 1.62
VL 1.52
UH 1.27 UHL 0.92
UMH 1.05 UL 0.83
VH 1.5
VMH 1.1
VHL 0.94
VL 0.84