Icom IC-M803 Service Manual page 64

MAIN UNIT(2/9)
See for the schematic.
IC9673 IC9691
HV (13.6V) H4V H4V H3R3V H3R3V
MAIN CPU
DC-DC REG
DCLK
IC4321
H4V +2R5V FP2R5V
FPGA2.5V
REG
PWRSR
DC-DC UNIT
(13.6V)
14V 14V
TUNER
ACC
AF-AMP
IC9721
+8V 8V 8V
OPamp,etc
DC-DC
IC9751
DCLK
8V +5V A5V
ANALOG
REG
IC4361
8V +5V DA5V
AudioADC/DAC
REG
IC4381
8V -12V -12V OPamp
DC-DC
DCLK
IC9702 IC4261
I5V I5V +1R1V FP1R1V
FPGA-core
DC-DC DC-DC
DCLK
IC4341
I5V +3R3V DA3R3V
FPGA3.3V
REG
AudioADC/DAC
PWRSR
IC4331
I5V +3R3V 3R3V
RFDAC
REG
RFAMP
IC4371
I5V +1R8V 1R8V
RFADC
REG
Explanatory notes
TX Line
RX Line
See
MAIN UNIT(9/9)
See for the schematic.
MAIN UNIT(7/9)
Q5931/Q5932
for the schematic.
IC5911/Q5911
IC5401
NASBS
ALC-CTRL
ALC
ALC
AMP
RAM
IC5911
ALC IC5911
-12V
AMP
FORLP
ALC
AMP
POCV
IC5104
IC5921
IC5921
FLASH
METER
ALCL ROM
REFLP
APC
AMP
AMP
See
8V
MAIN UNIT(6/9)
Q5981
ALC
for the schematic.
EALC
AMP
IC5921
IC5081/Q5081/Q5082
PFIDL
APC
H3R3V RTC
AMP
ICCV
H3R3V
IC5011
HV NRST
RESET
MATRIX
ITU/GENE/STMD/USAS
TXVS/TRVS/AMAS
VER0/VER1/VER2
FNC0/FNC1/FNC2
IC4901
IC5001
CPU
ECK/EDT
EEPROM
ALCL
ALCL
TCON
TCON
TXS SLFS
EKEY
RXS
EKEY
AFONS
ESTA
MMODS RPPS
ESTA
IC4902
AMODS
ANTCL DMODS
ANTCL
NASBS
THML DCSYNCS KEYIN
THML BUFF
HPONS ASENI
PWRSR DPONS TRAS
PWRSR
HPOFS DSENI
DPOFS
A5V
IC5051
PDIDV
MCK/MDAT/
DID1V
DSTB
D/A
DID2V
FANV
A5V
FILSTB
MCK
MDAT IC5061
L1S
DRESL
L2S
EXPANDER L3S
L4S
A5V
FILSTB
MCK IC5062
HB1S
DRESL
HB2S
EXPANDER HB3S
HB4S
A5V
FILSTB
MCK IC5063
HB6S
DRESL
HB7S
EXPANDER HB8S
HB9S
A5V
FILSTB
MCK IC5064
DB1S
DRESL
DB2S
EXPANDER DB3S
DB4S
A5V
IC5101
FPGA
X4921
MCLK/FRM/BCLK
DX_AFO/DX_ACC
DX_AGC/DX_REFC
DA3R3V
DA5V
NMRS
DRESL
MDAT
MCK
FILSTB USB R
A/D
RMNEAO
J5071
DA3R3V
FID1V REFV L
A/D
FID2V POCV
DA5V
FID3V ICCV
FID4V DRIV
IC5621
L5S
L6S
L7S
L8S
HB5S
L9S
L10S
DB5S
DB6S
10-2
MAIN UNIT(5/9)
MAIN UNIT(1/9)
See
See
for the schematic.
14V
KEYIN
Q4141/Q4161/Q4162
DCLK_P
DCLK_N ASENI
TRAS
EALC
MAIN UNIT(8/9)
See for the schematic.
AMOD
AGND
AAF
AAFE
IC5501
IC5521 IC5601
AF
VOUT5
D/A LPF
AMP
fc=15kHz,A=0.5
AFONS
IC5541
VOUT1 AAF
D/A LPF
AAFE
fc=15kHz,A=1
IC5541
VOUT2 DSAF
D/A
LPF
DSAFE
fc=15kHz,A=2 LRXD
LTXD
IC5581/Q5581
VOUT7 DC
D/A HAGCV
AMP
IC5581/Q5582
VOUT8 DC
D/A DAGCV
AMP
IC5561
VOUT3 DC
D/A XOCV
AMP
IC5661/Q5661
AMOD
AGND
Q5041/Q5042
SEND
DSENI
AMODS
SW
IC5651/Q5651
DSMD
DSMDE
DMODS
IC5681/Q5681
FMOD
FMODG
A5V
MMODS
IC7701
GTX/GRX/GRESL
GPS
MODULE
IC7703
A5V +3R3V
REG
Q7751/IC7751/Q7791/IC7791/IC7741
DNMEI
NMEA2
I/F
Q7731/IC7731/Q7792/IC7791/IC7741
RNMEI NMEA1
I/F
DTR/RPC
RNMEO RS232C
I/F
NMRS
IC7721~IC7723/Q7721/Q7722
for the schematic.
Q4142
FSK [ACC]
SW
J4006
6
7 1:CWK
7 6
1 2:AF GND
8 3:SEND
SEND 3 4:MOD
3 8 1
SW 4 5:AF
2
6:NC
5
5 4 7:14V
8:ALC
2
[EXT-SP]
AFO
J20015
AFE
J20016 TO FRONT UNIT
1
1:FMOD
2
2:FMODG
3
3:GND
4
4:FAF
5 5:FAFG
HV 6 6:H13V
7 7:H13V
8 8:TXD
9
9:RXD
10
10:GND
IC4021/IC4022
FORL
METER
FORLP
AMP
IC4021/IC4022
REFL
METER
REFLP
AMP
IC4072
DIDL
BUFF PDICL
IC4072
FIDL
BUFF PFICL
R2646/R2647
VDL LEVEL
HV
SHIFT
CONNECT UNIT
J7711
5
1:DMOD+
9
2:DMOD-
4
3:GND
8
4:DAF+
[AF/MOD]
3
5:DAF-
7
6:GND
2
7:NC
6
8:SEND
1
9:GND
IC7702
+3R3V
REG
FI7701
[GPS-ANT]
BPF
[GPS-DATA]
J7721
5
1:DCD
9
2:RXD/NMEA-OUT
DTR 4
3:TXD/NMEA-IN
8
CTS
4:DTR
3
TXD
5:GND
7
RTS [REMOTE]
6:DSR
RXD 2
7:RTS
DSR 6
8:CTS
DCD 1
9:NC