Icom Ic-2800 Dual Band Fm Tranciever Service Manual

SECTION 11        VOLTAGE DIAGRAM  CONTROL UNIT
IC7  TC7W14FU12
34
5678
R3 100
R4 100
R5 100
R6 100
R7 100
R8 100
R9 100
R10 100
R11 100
R13 100
R12 100
C57
0.1
R112
10k
R287
10k
R288
15kR285  10k
R286
15k
C56
270p
W11W12
8VPOS 39 VPOS 210
VPOS 111ZOOM12
U/D 13POL 14INT/EXT 15CPV 16OEV3 17OEV2 18OEV1 19STV 20OEH 21OH 22STH 23CPH4 24
CPH3 25
CPH6 26
CPH2 27
CPH5 28
29
STH1
OEH
Q2H
CPH1
CPH2
CPH3
GND
B
G
R
VB
RL
STH2
VEE
VCOM
VGH
VDD
STV2
OEV
CPV
STV1
VSS U/D
VGL LCD
DS1  EDTCA22QB0
C3
10+
C2
0.1C1
10+
C4...

C36
10+
L9
10 H
IC7  TC7W14FU
12
3
45678
C55
10
+
R3 100R4 100R5 100R6 100R7 100R8 100
R9 100R10 100
R11 100
R13 100R12 100
C57
0.1C31
0.1L7
10 H
C33
0.1C34
10+
C25
0.1
L8  
2.7 H
R15
470k
C23
0.001R16
10k
L16
10 H
IC2
TC75S51F
+
Ð1345
2
C26 
560p
C27 
0.1
R18
1M
R17 
68k
C30
39pR25
27k
R26
50kR27
1k
C35
0.1
R20 
68k
R21 
22kR22 
47k
R24
4.7k
R23
2.2k
C28
0.1
C29
0.1
L10  
10 H
C92
470p
R106  
560
R100
150k
R107
680R109
10k
L13 
10 H
C52
0.1C53
10+
D1
1SS355R14
27k
C24
120p
R290  
1.5k
R110
150R164
150...

C36
10+
L9
10 H
C55
10+
L16
10 H
F
+
Ð13
5
226 60p27 .1R17 
68k
C30
39p
R25
27kR26
50k
R27
1kC35
0.1
R20 
68k
R21 
22k
R22 
47k
R24
4.7kR23
2.2k
C28
0.1
C29
0.1L10  
10 H
R106  
560
R100
150k
R107
680
R109
10k
L13 
10 H
C52
0.1
C53
10+
R290  
1.5kR110
150
R164
150
CP1
R292
3.3
3 L
C193
220pC194
220p
C54
4.7Q11
2SC4081 R
D14
MA8047 MR108
5.6k
+
IC16  
M52042FP
: Other
M52045FP
: [EUR, ITA]
1
2
3
SYNC OUT 4
HD 5
6
7
8
CONT 9
10
11
12
GND13 14
15 S.W.16 17 18 TINT19 COLOR20 21 22 23 VCC24
C87 
0.01R168 
47k...

SECTION 11        VOLTAGE DIAGRAM  
CONTROL UNIT
C36
10+
L9
10µH
IC7  TC7W14FU
12
3
45678
C55
10
+
R3 100R4 100R5 100R6 100R7 100R8 100
R9 100R10 100
R11 100
R13 100R12 100
C57
0.1C31
0.1L7
10µH
C33
0.1C34
10+
C25
0.1
L8  
2.7µH
R15
470k
C23
0.001R16
10k
L16
10µH
IC2
TC75S51F
+
–1345
2
C26 
560p
C27 
0.1
R18
1M
R17 
68k
C30
39pR25
27k
R26
50kR27
1k
C35
0.1
R20 
68k
R21 
22kR22 
47k
R24
4.7k
R23
2.2k
C28
0.1
C29
0.1
L10  
10µH
C92
470p
R106  
560
R100
150k
R107
680R109
10k
L13 
10µH
C52
0.1C53
10+
D1...

R417
3.9k
MU/D M8V
PTT
MICE
MIC
E
M D ATA
T D ATA
R D ATA
GNDHV
IS2 IS1 IS0
II3
II2
II1
II0
EXTMICE8
SPE
MICUD
EXTMIC SP
PTTP
LIMIT
LV
TONEIN
VSQL
VSOUT
USQL
USOUTCLONEC
DTMF
TXDF
RXDF
CTCSS
Q4
Q3
Q2
Q1 TMAIN
STD
OPD
VDMUTE
UDMUTE
VAMUTE
UAMUTE
TONEIN
FANC
PTTM1
PTTP1
DMAIN
POWC
RESETUMMUTE
VMMUTE
CLONEC
DTMUTE
PLSTBMMUTE
STB
PSEL
CKPSQL
D ATA
UTX
VTX
RXD
W/NUDMUTE
TXDMW/NVDMUTE
VSHIFT
3LB
4RX
1RX
UAM
ETONE
VA M
TXDF
PCTRL
DMAIN
TMAIN CTCSS
UUNLKETONE
VUNLK DTMF
RXDFMRIPT
VCK
V D ATA
DTMUTE
MMUTE
PTTP1...

MW/N R358
2.2k
R455
82kR456
47k
R454
82kR441
10kC451
10
+
C450
100p +
Ð 3
21
4 8 R440
100
R439
82k C447
0.0027 C446
0.1
4382k
R443
47k
[EUR], [ITA] only
2
R], [ITA] onlyR403
1MR404
2.2k
R405
10kC433
0.1R406
22k R391
1k C422
0.001
C423 1 R390
470k
R389
2.2kR380
1k C413
0.001
C414 1
R378
2.2k R379
470kR359
10kC401
0.1R360
22k R357
1M
D68
RB706F-40D75
DA202U
+
Ð 3
21
4 8 R545
1k
480pC449
82pVDET VA F
UAF
VAFO UAFOUDET
PSQL PSEL
R272
10k
C2841
PSQL
CP-SMV
VSQL MOD
US
Q
1RX
4RX D ATA
CK
PLSTB
VUNLK
UUNLK 8V...

E
CHASSIS
UNIT
6 5
FV
CP-SMU8VC5V
AFOUTHV
PSQL CP-SMVVATTC UATTC LV04
LV03
LV02
LV01
FANC
PCTRL USQL USOUT
VAMUTE
UAMUTE
UDET UAM
V D ATA
VCK
SP R11
33kR12
470R13
33k
R29
4.7kR30
100kR41
820
R42
1kR43 22R47
100
R62 100R67
100k
R85
39kR120 18k
R121 100kR122
10k
R123
47kR124 22k
R125
100kR126 820k
R127
27k
R162
33k
R244
120k
R270
1k C13
0.001
C19 1pC30
2.2 +
C36
22pC40
0.001
C42
12pC44
0.001C45
0.001
C48
18pC51
0.001
C55
12pC64
0.001
C83
22pC84
30p
C86
5pC88
0.001
C94
100p
C95
0.001C97
1pC98
1pC102
1pC103...

R417
3.9k
MU/D M8V
PTT
MICE
MIC
E
M D ATA
T D ATA
R D ATA
GNDHV
IS2 IS1 IS0
II3
II2
II1
II0
EXTMICE8
SPE
MICUD
EXTMIC SP
PTTP
LIMIT
LV
TONEIN
VSQL
VSOUT
USQL
USOUTCLONEC
DTMF
TXDF
RXDF
CTCSS
Q4
Q3
Q2
Q1 TMAIN
STD
OPD
VDMUTE
UDMUTE
VAMUTE
UAMUTE
TONEIN
FANC
PTTM1
PTTP1
DMAIN
POWC
RESETUMMUTE
VMMUTE
CLONEC
DTMUTE
PLSTBMMUTE
STB
PSEL
CKPSQL
D ATA
UTX
VTX
RXD
W/NUDMUTE
TXDMW/NVDMUTE
VSHIFT
3LB
4RX
1RX
UAM
ETONE
VA M
TXDF
PCTRL
DMAIN
TMAIN CTCSS
UUNLKETONE
VUNLK DTMF
RXDFMRIPT
VCK
V D ATA
DTMUTE
MMUTE...

INTRODUCTION
This service manual describes the latest service information for 
the IC-2800H FM TRANSCEIVER at the time of publication.To upgrade quality, all electrical or mechanical parts and   inter-
nal circuits are subject to change without notice or obligation.
DANGER
NEVER 
connect the transceiver to an AC outlet or to a DC 
power supply that uses more than 16 V.  Such a connection 
could cause a fire hazard and/or electric shock.
DO NOT 
expose the transceiver to rain, snow or any liq-
uids.
DO...

A-5570MI-S
© 1999 by Icom Inc.
6-9-16, Kamihigashi, Hirano-ku, Osaka 547-0002, Japan
DUAL BAND FM TRANSCEIVERiC-2800h
iC-2800h