Block Diagram - Icom IC-RX7 Service Manual Addendum

SECTION 9.

BLOCK DIAGRAM

0.1500–1300.0000 MHz
ANTENNA
D1
LIMIT
1SV172
MAIN UNIT
ATT SW
0.15-0.45 MHz/1.62-76 MHz
Q2:2SC4738
Q3:XP4312
LPF
D2:MA2S077
B1V B2V B2V
BC
0.45-1.62 MHz
BAND BAND
BPF
SW SW
D4~D5:1SV308 D53:SVC347 D28~D29:1SV308
TUNE
VHF
D7~D10:1SV308 76-350 MHz
BAND
BPF
SW
D 57:MA2S077
Q 47:UNR9113
UHF
350-470 MHz
LPF
800M
470-833 MHz
BPF
D12:HVC375B
D13:HVC375B
1G
833-1310 MHz
BPF
R3V
EARANT
LPF
EAR SW
(RF:Earphone ANT)
D56:1SV308
Q45:UNR9115J
D15:HVC376B
HEAT
CLOCK
LCD SENS
SHIFT
POWER Li-ion
KEY BATT
DET
BDET
POWE R
EAR CPU
ATT
S21 IC7:HD64F2238
DCK
UP
key
E
ENC DUD
DN
LCD
BACKLIGHT
IC14:24LC512T
VCC IC15:24LC512T
EEPROM
Q5:2SC4617
DS10-DS12:SML-A12WT
R3V
RF
AM P
IC1
UPC2746TB
D27:1SV308
BARANT
ANT
SW
OSC
D37~D42:1SV308
Q12:2SC5006 HF3V
D40~D42:1SV308
D 33:MA2S728 VCO3V
D42:ISV308
D 34:MA2S728
RF BAND
LPF BUFF
AM P SW
Q12:2SC5227
ATTC
AGC
VHF3V D31:HVD328C
Q7:FH102 D35:HVD328C
D 14:MA2S728 D51~D52:MA2S077
D 15:MA2S728
RF D58:MA2S077
BPF
AM P
TUNE
SHIFT3V
AGC ATTC
UHF3V
Q 41~Q42:2SC5006 D 32:HVC350B
D 18:MA2S728 D 36:HVC350B
D 19:MA2S728
RF
BPF
AM P
TRAC VCO
AGC ATTC 3V
800M3V
Q10~Q11:XP1113
Q5:2SC5008
D26:HVC375B
D 20:MA2S728
D25:HVC375B
D 21:MA2S728
RF
BPF
AM P
AGC ATTC
TRAC
G3V
Q6:2SC5624
D 22:MA2S728
D 23:MA2S728
RF TUNE
AM P SHIFT3V
TRAC
ATTC
AGC ATTC
SHIFT3V
CR-774
X1
TUNE
12.288 MHz
BAR
ANT
CL_OUT
CL_IN
KS3
KS2
KS1
KS0
+3V
D3~D14:MA2S111
Initial
KEY BUFF
Matrix EXT
WRITER
IC1:TC7W08FU
RESET
IC6:S-80928
CPU3V
9 - 1
MODEC 1
R3V R3V
FI1
EFCH429MKQP1
IC5
IC8
UPC2757TB
UPC2757TB
MODE
BPF
SW
2ndMix
1stMix
1stIFFIL D44:DAN235E
1st VCO UNIT
VCO3V VCO3V
I C3:MB15T61UL
PLL
BUFF BUFF
IC
IC2:UPC2746TB
Q8:2SC5231
LOOP
FIL
Q6:2SK880
Q7:2SC4117 1~4 VCO3V
1VCO3V
1VCO
D7~D10:1SV308
Q1:2SC5006
D1~D2:1SV309
Lo
SW
939.1000M~1170.1495 MHz
2VCO3V
2VCO
D3:HVC417C
Q2:2SC5006
700.9000M~939.0995 MHz
3VCO3V
3VCO
D4:HVC417C
Q3:2SC5006
512.6000M~712.0995 MHz
4VCO3V
4VCO
D5:HVC417C
Q4:2SC5006
311.9500M~520.8995 MHz
LOGIC UNIT
(RF:Earphone ANT)
R3V R3V
IC12:LM2904PWR
Q16:UNR9115J
SIGNAL AF FIL
FIL
VP
ANT LEVEL Q20:XP6501
TUNE CONV. TRAC Q23:2SJ144
D 22:MA2S111
D19:SVC347 Q21:XP4601 IC19:LMV321IDCK
D 37:MA2S111 IC20:CD4066BPWR
VP AFVCC +3V
+10V
+3V D/A +3V DC-DC +3V AF VCC +3V
REG REG REG
I C16:BH2220FVM IC11:TC7W04FU Q11:2SB1201 Q2:2SA1588
Q24:2SC4738 Q12:XP1501
D 24-D27:1SS372
MODEC1 R3V X3:CDBKB450K
R3V Q38:XP1114
FI2
Q40:UNR9213J
FL-293
IC13:TA31136FN
Q31:2SC5006
D50:MA2S728
XTAL M ODE IF
BPF AM P
SW
D49:DAN235E FM IF-IC
AM/NFM
AGC
+3V R3V
19.2 MHz OSC
FSET LO
AM P
Q36
X1
2SC5006
3rd-LoAMP
CR-869
Q46:UNR9213J
OSC 19.2 MHz
NOISE
2nd VCO UNIT
R3V
RSSI
AGCC
RIPPLE R3V
FIL
AM_DET
Q4:2SC4617
AGCC AF SW
AM MONO
409.4500 MHz
or I C9:TC7W53FK
448.7500 MHz
VCO
LOOP AM3V
WFM FIL
408.3500 MHz Q1:FH102
or D1:1SV314
449.8500 MHz
AGCC M ODE
CONT.
Q 23:UNR9115
IC1:MB15E03SL
R3V
PLL WFM
IC
B1V BARAN T
HF3V B2V
R3V
BAND R3V
SELECT
OSC
BUFF
Q11:XP1110
Q17:XP1113
Q3:2SC5277
CL_OUT (RF:Earphone ANT)
+3V
CLONE CLONE
CL_IN
BUFFER
IC8:TC7W04FU
Q8:2SA1832
Q10:2SC4738
D16:1SS400 +3V +3V AFVCC
R3V
Q29:2SC4213
Q 30:UNR9115
AFO
AF TONE AF VR AF MUTE
AM P CTRL AM P
Q18:2SC4738 IC9:NJM2070M
IC10:SM6451B
D 33:MA2S111 HVDE T
D34:MA8039
Q25:UNR9213J
SHIFT3V
R3V CPU3V
VCC
IC4:NJU7775F32
CPU3V +3V R3V R3V CPU3V EXT/BATT
BUFF REG REG VCC DET
IC3:NJU7775F32
Q28:2SA1588
D28~D29:MA2S111
D31~D32:MA2S111
(FM RX)
FI3:ELFY450E
MIXOUT
D47:DAN235E
D48:DAN235E
CERAMIC
MODEC2
BPF
(AM RX)
AM3V
AM3V
Q25_1/2
XP6501
S METER AM IF
CONT. DET AM P
Q26:XP6501
AM3V D 45:MA2S728
AGC
AGC
Q25_1/2:XP6501
XP6501
MODEC1 VCO3V
M ODE 1stVCO
CONT. 3VREG
Q43:2SA1577
Q 44:2SC4738
Q39:UNR9213J
D 54:MA2S111
Q37:XP1114
D 55:MA2S728
R3V VCC R3V
UHF3V G3V
VHF3V 800M3V
R3V
REG SW
Q18~Q19:XP1113
J5
1 1
2 2
EXT DC
J4
EXT SP
MAIN UNIT
SP1
INTSP
CHASISS
CHARGE
CONTROL +
-
Q 27:HAT1023R
D2:SB07-03C BATT
D 35:MA2S728
D401:RR264M
IC18:BQ24064
Q26:UNR9213J