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10 - 1
SECTION 10
BLOCK DIAGRAM
IF
DRIF
DSPI1
IC651
BA15532F
IC501
AK4528VF
IC102
BU9480F
DTIF
DAGC
MONI
DRAF
DTAF
AMP
IF
AMP
LO
AMP
AMP
AMP
IF
AMP
AF
AMP
AF
AMP
PWR
AMP
AGC
AMP
IC1460
BA15532F
Q250
3SK131
Q203
2SC4081
Q202
2SK882
Q205
2SA1576
AGC
AMP
Q204
2SC4081
IC281 TC4SU69F
IC282 TC4SU69F
IC1460
BA15532F
IC280
TC4W53F
IC400
MC1496V
(20K BW)
(20K BW)
(20K BW)
LPF
LPF
IC1120
µ
PC4574G2
IC1060
NJM4558M
IC1401
NJM2058M
IC1120
µ
PC4574G2
LPF
IC1120
µ
PC4574G2
BPF
FI381
CFWM455D
BPF
NB GATE
FI271
CFWM455D
D252 1SV308
D253 1SV308
TONE FIL
UT-102
OPTION
VCA
DET
IC1001
NJM2904M
IC1080
M5282FP
IC1401
NJM2058M
MAIN CPU
IC1300
NJM2058M
IC1310
BU4053BCF
BUFF
IC1300
NJM2058M
D1300
1SS385
COMPA
RATER
IC1300
NJM2058M
DOUT
(MUTE)
SPCH
NB
DET
D200
1SS375
3LO
GATE CTRL
Q206 2SC4081
Q207 UN911H
IC200 NJM2056M
Q208 XP4311
BPF
FI272
CFWM455D
2F15
FMTL
SSTB
MSL1
SBSY
SQLS
MONV
VOXL
KEY
FORL
MSL2
OVDK
AGC
AGC
ALC
NBS
NBV
Q201
2SK882
NOISE
AMP
NOISE
AMP
NOISE
AMP
Q200
2SK882
Q330
2SK882
NOISE
AMP
AGC
AMP
IC1280
NJM4558M
Q780/Q722/Q724
2SC4081
IC571
TC4S71F
IC101 MC14071BFEL
IC102
µ
PD4030BG
Q782/Q785/Q786
2SD1619
Q783/Q787/Q788
DTA114EE
ANTI
VOX
AF
AMP
IC1040
TC4W53F
IC1160
TC4W53F
AF
AMP
VCA
DIFF
CONV
A/D
Lch
VCA
CTRL
RESET
SEND
CTRL
LEVEL
CONV
AF-SW
RIPPLE
FILTER
EXT-SP
JACK
IC1180
M5282FP
IC1400
M5282FP
Q1260
2SD1801
IC1220
TC4W53
SPS
IC1240
LA4425A
BEEP
START
P2MS
SEND
HSEND
VSEND
CIV
CIVE
TRAS
AFG1V
AFG2V
9K6S
MODS
BAND
ACCMOD
AAFO
MIGV
AVXL
AFMS
14VA
DATA
LPF
IC1401
NJM2058M
IC1401
NJM2058M
LPF
AMP
IC1280
NJM4558M
ESTA
_SENI
VOX
IC200
NJM2058M
AMP
TCON
AH-4
AH-4
STRAIGHT KEY
X1500
CR-520
(19.6608MHz)
IC1560
S-80942ANMP
D/A
MULTI
IC502
M62352GP
EEPROM
IC1580
HN58X24128FPI
IC1900
BU4053BCFV
DATA PTT
Q700
2SC4081
Q1880
DTC114EU
FPWK
IC1500
HD64F2357F20
FKEY
EKEY
VCCL
THML
ALCL
REFL
DPTL
VREF
REFL
LOCD
SKYS
_SKYS
RTKI
_RTKI
SENI
SQL
PWRK
_TRAS
_PWRK
S601
POWER
S1
TRANSMIT
_SQLS
CI-V
I/F
LEVEL
CONV
IC1940 TC7W04F
Q1940 2SA1576
Q1941 2SC4081
TNV1
IC200
NJM2058M
AMP
TNV2
IC200
NJM2058M
AMP
DRIV
AFG1V
AFG2V
MONV
MIGV
POCV
NBV
Q511
2SC4081
IC360
NJM2058M
IC300
NJM2058M
LEVEL
CONV
REF
ALC
AMP
Q307
2SA1576
Q303 2SA1576
Q305 DTC144TE
IC300
NJM2058M
ALC
AMP
AMP
FOR
FORL
ALC
14V
TXS
VCCL
T8V
IC360
NJM2058M
IC300
NJM2058M
VFOR
POCV
AMS
P2MS
P50S
PHFS
ICL
ICH
EALC
UNSB
-8V
AMP
ALCL
IC300
NJM2058M
AMP
ALC
AMP
PWR
CTRL
DELAY
CTRL
D300/D301
MA8030
LEVEL
CONV
Q450 2SC4081
Q452 2SD1619
T8
REG
RXS
8V
14V
R8V
Q451 2SC4081
Q453 2SD1618
IC1006
SED1522FOC
Q301 2SC4081
Q302 2SB1202
Q303 2SC3647
Q304 2SC3647
X1001
CR-567
IC1001
HD6433833SD85H
IC1002
BU4051BCF
BKL
KI2
KI3
KI4
KI5
KI6
R8
REG
Q801 2SB1201
Q802 2SC4116
D801 MA8068
FAN
CTRL
LCD
DRIVE
DS1001 DLC-7997S2GT
DS1002
HMDS 3 A1W 70N/AZ ASSY
LCD
MAIN UNIT
CHASSIS UNIT
DSP UNIT
SP1
AFO
FAFE
FAFO
MIC
SEND
SQL
FSPS
CHASSIS UNIT
FRONT UNIT
SUB-LOGIC BOARD
DISPLAY BOARD
MODE BOARD
TEN-KEY BOARD
PHONE BOARD
MIC BOARD
PBT BOARD
RIT BOARD
J1
J2
J1
MIC
JACK
DASH
DOT
MIC
MSEND
SQLS
MUD
PBT1
S2
PBT2
S1
S1
RIT DIAL
M-CH
EP1
MAIN DIAL
MSA
KYSL
MSB
WAVE
FORMER
WAVE
FORMER
IC101 MC14071BFEL
IC102
µ
PD4030BG
IC101
MC14071BFEL
-8V
DC-DC
IC401 NJM2360
D402 SB10-05PCP
KEY SPEED
R13
x4
14V
-8V
RSB
TRAK
S2
TUNER
TUNK
S3
ANT
ANTK
S4
NR
NRK
S5
NOTCH
NOTK
RSA
MUDL
DOTK
DSHK
PB2B
PB2A
PB1B
PB1A
MUPK
MDNK
S6
CALL
S8
P.AMP/ATT
CALK
S7
LOCK/SPEECH
LOCK
PITL
CW PITCH
R11
PWRL
RF POWER
R9
MIGL
MIC GAIN
R7
R4
RFL
AF
AFL
RF
R1
NRL
NR
NOTL
NOTCH
S9
NB
S10
VOX
S11
MONI
MENU
IC1007
HD61202UFS
LCD
DRIVE
IC1008
HD602UFS
LCD
DRIVE
IC1009
HD602UFS
LCD
DRIVE
SUB-CPU
MULTI
SSBK
DC-AC
KI7
MNUK
F1
F1K
F2
F2K
XFC
1.8(1)
KI2
XFCK
MPW
MPWK
MPR
MPRK
F3
F3K
F4
F4K
F5
SSB
SSBK
DS3
CWRK
AFMK
FILK
CW/RTTY
LOCK
LED
AM/FM
FILTER
F5K
SPLD
DS5
SPLIT
LED
FIND
DS4
F-INP
LED
TXD
DS1
TX
LED
RXD
DS2
RX
LED
10(4)
21(7)
GENE(.)
7(3)
KI4
18(6)
28(9)
144(ENT)
F-INP
KI5
SPLIT
A/B
TS
V/M
KI6
PBTC
M-CL
MW
KI7
RIT
DTX
CLEAR
3.5(2)
KI3
14(5)
24(8)
50(0)
CWRK
AFMK
KI0
KI1
FILK
MF1
FANV
DSPO1
IC701A
µ
PC4570G2
D/A
Lch
LPF
DSPI2
IC601
BA15532F
DIFF
CONV
IC801
SN74AHC244PW
SER-
DATA
SW
IC101
SN74HCT244APW
LEVEL
CONV
IC405
BU4021BF
PARA-
SERI
A/D
Rch
DSPO2
IC701B
µ
PC4570G2
D/A
Rch
D/A
Rch
AGC1
LPF
BUFF
BUFF
D/A
Lch
AGC2
OBSY, IBSY
RQO
RQI
DI
CK
DO
STBO
DRES
OBS,IBS
OUT1-8
SERIAL DATA (Ext)
DXO
CS
LRCK
BUFF
IC406
SN74AHC74PW
IC201
M29W102BB
IC401
SN74AHC595PW
LATCH
IC404
SN74AHCT374PW
LATCH
IC403
SN74AHCT374PW
LATCH
FLASH
ROM
SERI-
PARA &
LATCH
IC4B
SN74AHC74PW
1/2
IC4A
SN74AHC74PW
IC301
TMS320VC33PGE120
1/2
DSP
SERIAL DATA
BICK
IC3A
SN74AHC74PW
IC51
TC7WHU04FU
1/2
X51
CR-709
(60.0MHz)
BUFF
IC1
TC7WHU04FU
X1
CR-628
(24.576MHz)
Q301
DTC144EU
KEYIN
LEVEL
CONV
Q302
DTC144EU
UNLK
LEVEL
CONV
RQO
RQI
UNLK
KEYIN
DI
CK
DO
STBO
DRES
to RF unit(BLOCK )
(2)
1
2
3
4
COMMON LINE
LINE
RX LINE
TX LINE
DATA BUS LINE
• BLOCK (1)
Summary of Contents for IC-7400
Page 1: ...HF VHF TRANSCEIVER i7400 SERVICE MANUAL ...
Page 63: ...to S LOGIC board J303 DS1002 9 2 DISPLAY BOARD TOP VIEW 9 3 for free by RadioAmateur eu ...
Page 72: ...9 12 1 9 18 10 BOTTOM VIEW RF UNIT for free by RadioAmateur eu ...
Page 74: ... BOTTOM VIEW CTRL UNIT 9 14 for free by RadioAmateur eu ...
Page 76: ... BOTTOM VIEW TUNER UNIT 9 16 for free by RadioAmateur eu ...
Page 78: ...9 18 BOTTOM VIEW PA UNIT for free by RadioAmateur eu ...
Page 92: ...1 1 32 Kamiminami Hirano ku Osaka 547 0003 Japan S 13811HZ C2 2002 Icom Inc ...