Block Diagram - Icom IC-F1721/D Service Manual

SECTION 10

BLOCK DIAGRAM

Q4
2SK880
LVIN
IC4
IC1 X2
NJM12902V LMX2352TM
CR-794
BAL
15.3 MHz
PLL
LOOP
AMP
REF IC
FIL
Q46, Q47
2SC4116 x 2
Q1
2SC4116
X3
Tx 272 – 348 MHz
Rx 364.7 – 440.7 MHz
45.9 MHz
BPF
J11
SQIN
HANG
MMUT
VCC
RCK
C_RES
3VA X4
CTS CDBC450CX24
BUSY
RTS
RDAT
RXD
D-SUB25 TXD
GND
H_GND
VCC
IC39
TA8225L
H_OUT1 AF
AFO
AMP
H_OUT2
HLC
IC34 IC8
TA75S01F M62363FP
SP1
SIGNAL
AF
AMP D/A
AMP
IC38
LA4425A
AFON
MUTE
SW
AFONO
Q28: DTC144EU
IC42
Q29: DTC363EK
BU40538CFV
D34: MA2S111
RMTO
D36: DAN202U
CP7
AMP
MIC
COM-
MIC
AMP PRESSOR
IC8
M62363FP
BAL
to TCXO D/A
MOD
to TX VCO
8V
RIPPLE
FIL
Q9
2SC4116
D11
HVC375B
BUFF
D6, D7: HVC376B x 2
Q11: 2SC4226
RLVA LV
ADJ
RXVCO
Q20
2SC5107
D13
HVC375B
BUFF
D8, D9: HVC376B x 2
TLVA LV Q12: 2SC4226
ADJ TXVCO
Q17: DTC144EU
Q18: XP1214
MOD
MOD
TXC
VCO SW
F
Q19
D12: 1SV239
2SC5107
X2
BPF
TXC
FI4
Q6
FL-380
2SC4215
IF IC
IF XTAL
IC12: TA31136FN
AMP
BPF
IC30
D2, D4: DAN202U ×2
M62334FP
RLVA
D/A
WIDE
TLVA
RSSI NOIS
CERAMIC CERAMIC
BPF
BPF
SCK
FI2 FI1
CFWM450G CFWM450E
IC1
NJM12902V
DET
LPF
FI3
Q3: 2SC4215
CFWC450E
DFIL CERAMIC
IF
AMP BPF
X1
CR-765
IC2
AK2346
Scramble
EXPANDER HPF LPF AMP
Decode
PRE Scramble
LIMIT
HPF LPF
EMPHA Encode AMP
FMPM
DIGITAL
DASW
MICA
FM/PM
SWITCH
IC43 IC42
BU40538CFV
BU40538BCFV
IC8
IC8
M62363FP
M62363FP
TENC
D/A D/A
IC8 IC9
IC8 M62363FP
NJM12902V
M62363FP
TONE
D/A
LPF
BEEP
D/A
10 - 1
Q22 D19, D20 Q23
MA77 ×2
2SC5107 2SC3356
TX/RX YGR
BUFF LPF
SW AMP
Q21: 2SC5107 182.35 – 220.35 MHz Q26: 2SK1829
RSSI
LPF AGC
AMP
D17, D18
HVC350B x 2
46.35 MHz
RF
BPF
AMP
AMP
Q24
Q10: 2SC4215 D16: HSB88WS
3SK293
Q13, 14: PMBFJ310 x 2 L22, L23: 617DB x 2
T2
X3
CR-563
IC6
DSDA
LC73872M
DISC DTMF
DECODE
SDEC
IC1
NJM12902V
CDEC
AMP
IC9
NJM12902V
IC16 TENC
IC15
LPF
AD7476ARTZ
NJM2711F
AMP A/D
IC-F1721D/F1821D only
IC19
NJM2711F
BUFF
IC21
TC7MET374AFK
D0-D7
RCK
I/O
DMMT DAFON
DRMT RDAT
DIGITAL DSP
IC25
IC41
TC7MET541AFK
CCK
TMS320VC5416PGE120
CSO
PTTI
CIRQD
BUSY
I/O PTTOT
S00
CCS
CLKIN
DASW
IC42 DET
BU40538CFV
DAFO
MAIN UNIT
LINER
MOD DMI
CODEC
AMP
IC44 IC18
TA75S01F AK4550VT
DMO
LPF AMP
SENC
IC13
NJM2115V
IC29
D31: UM901F
S-AV32: IC-F1721/D, F1821/D
D27: MA77
S-AV33: IC-F1710, F1810
PWR ANT
LPF LPF
AMP SW
IC37
TA75S01F
APC
AMP T2
D23, D26
HVC375B x 2
BPF
T1
SCK
IC26
SSO
HN58X24128FPI
EEPROM
MAIN CPU
X5
IC23
CR-520
HD64F2268TF
BEEP
MMUT
RMUT
CENC
POSW
Q7: DTC144EU
PWON
DUSE
DTCS CPU5
SW MD1
D14
DAN202K
PWR
VCON
DIGITAL CPU
IC20
X6 EEPROM
HD64F2239TE16
CR-771
IC28
HN58X2416TI
TXC
IC22
IC24
TC7S04F
S-80928CNMC
R8V
BUFF
REG
RESET
Q30: 2SA1577
TMUT
Q34
2SD1664
IC31: XC62048332M
T8V
3VA
REG
REG
IC32: R1114N151B
3VB
REG
Q31: 2SB1132
IC33: XC6204B332M
+5V
3VC
REG
REG
136 – 174 MHz
D38, D40
1SS375 x 2
DET
LPF
PWR
D41: MA2S728
MUTE
SW
TMUT
POWERSW
POSW
DS1
LCD
L4-0013TVY-1 KR0 OPF0
KR1 OPF1
KR2 OPF2
KR3
FRONT KS0 KYUP
KS1 KYDN
IC7 KS2
LCD
UNIT
SED1526FOA
DRIVER KYP0
KYP1
KYP2
KYP3
KYP4
IC3
HD64F3687 X1
CR-520
MFDA
FMDA
FRONT CPU
DIUD
DIAL
DICK
J2
CLI
AF VR
CLO
PTT
AFO
ALC
IC9
EXT MIC
AN6123MS
IC5
ALC
TC75S51F
AMP
MIC
AMP
IC8
TC4W53F
PWR
Q42
IC36
TA7808F 2SJ377
VCC
HV
+8V
POWER
REG
SW
IC40
OPC-1414
AN78L05M
CPU5
REG
Explanatory notes
VOLTAGE LINE
TX LINE
RX LINE
COMMON LINE
DATA LINE
CONTROL LINE