Block Diagram - Icom IC-F31GS Servise Manual

SECTION 10

BLOCK DIAGRAM

Q13
XP6501
RIPPLE
S5V
Q14
FILTER
2SK880
BUFF
LVIN
IC2 X1 IC1
TC75S51F CR-667 SA7025
LOOP
DRIVE
PLL IC
AMP FILTER
15.6 MHz FRACTIONAL N
TCXO
× 2
LPF
Q15
2SC4116
MOD
31.2 MHz
BPF
NOIS
DSIN
W/N
A
IC13
M62364FP
FRCN
SPLO
MOD
T1
T2
D/A
T3
T4
IC17
LC73872M
D/A
OSCI
DTPD
DTMF
DECODE DTSD
DTAC
DDST SO SCL
SCK SDA
DAST
J1
BEP1
D
SIG1
F
REM
OPTION
UNIT CIRQ
SI
1
SO
RMUT
MCIN MMUT
AFON
OPV11
MCOT
OPV12
CTCS
OPV13
PTIN
OPV21
PTOT
OPV22
OPV23
J2
CCS
C BEP2
SCK
OPT11
SIG2
OPT12
E
OPTION
OPT13
UNIT
OPT21
2
OPT22
OPT23
MCIN
MCOT
PTIN
PTOT
10 - 1
Q9 DTC144EU
Q10 XP1214
VCO
VCOS
SW
Q11: 2SC4226
D6, D40–D42: HVC350B
Q6
Q8
2SC4215
RX VCO
2SC4215
D7
BUFF BUFF
1T365
MOD
Q12: 2SC4226
Q7
D8, D43–D45: HVC350B
2SC4215
TX VCO
BUFF
Q17 2SC4116
X2
Q16 DTA144EU
CDBCA450CX24
W/N
W/N
SW
IC3
TA31136FN (D) Q18 FI1
IF
2SC4215 FL-322
SECOND MIXER 31.65 MHz
XTAL
IF AMP
AMP
BPF
SQL AMP
DETECTOR
RSSI
FI2
D15
D16
SFPC450E
DAN202U
DAN202U
CERAMIC
W/N
W/N
BPF
SW SW
FI3
SFPC450G
CERAMIC
BPF
IC10
NJM2902V
AMP LPF HPF AMP
HPF
MSK MSK
HPF BPF LPF
DEMOD MOD
COMPRE-
AMP BUFF
SSOR
Q47
2SC4081
MCIN
IC27
M62334
TRD REGS1
MSKE REGS2
DIN RTM
SCK RDT
APST FCLR
X4
CR-563
3.58 MHz
IC7D
NJM2902V
LPF
CTDA
IC13 Q40
DA4 XP1214
FIL
DUSE
Explanatory notes
SW
IC30 CONTROL LINE
TC7S66FU
COMMON LINE
Q41 Q44
DTC144EU DTC144EU
TX LINE
CTCSS
FIL
DTCS
RX LINE
SW
SW
DATA
RESTO- RXDT
LPF RATION
IC31
TC75S51F
IC20B IC20A
NJM2904V NJM2904V
SDEC
DATA
LPF
MAIN UNIT
Q3 Q2
D4, D5: MA77
2SC4226 2SK2973
PRE
TX/RX YGR
DRIVE
SW AMP
ATT
Q21
2SK1829
RSSI
GATE
CTRL
D18 D19
Q19 HVC375B HVC375B
3SK206
BPF BPF
MIXER
T4 T3
Q27 Q26
2SC4212 DTC144EU
FIL FSW W/N W/N
SW SW
Q23 2SB1132 R
Q24 XP6501
IC7C AFON
NJM2902V VCC AF AMP AFMT
REG
LPF
COMPANDER
IC9 TC35453F
AF
AMP
EXPAN- AMP
DER
IC13
IC5
DA1
TA7368F
SIG1, SIG2,
CTCS, TONE
HPF LPF AMP
IC7B
NJM2902V
B
LIMIT
AMP
AMP
BEP1 BEP2
TONE BEEP
IC13
MCOT
DA2
POWER SW
F1
VCC
FUSE
Q32 2SB1132
Q33 XP6501 IC12
AN8005M
+5
+5V
REG +5
CPU
Q30 2SA1362
T5C R5C
R5
R5V
REG
BUSY
DTPD
DUSE
Q31 2SA1362
W/N
S5
FSW
S5V
REG S5C
AFMT
SPCN
Q29 2SA1362
T5
T5V
REG
MAIN UNIT
Q1 D2 D1, D24, D25
2SK2974 MA713 MA77
PWR
PWR
DET
AMP
IC4
TC75S51F
APC
AMP
T4
D20 D21
HVC375B HVC375B
RF
BPF
BPF
AMP
Q20
3SK293
T2 T1
MICI
IN/EXT
MIC SW
IC19
IC13
BU4053BCFV
DA3
IC19
BU4053BCFV
PTT/MD1
SW
SPCN
Q6, Q7
PTIN
CPH3403
SP
Q8
G SW
2SC4081
PTOT Q9
DTC144EU
12.288 MHz D27
IC18 TA75S01F X3 MA77
CR-681
SHIFT
VOX
SW
VOXT
RDB WRB RESB
LCD MODULE
D0-D7 RS
BATT IC1
CPU TC74VHC373FT
IC15
S-80942ANMP IC14
HD64F2238
RES
RESET KS0-3
D0-D7
EXPAND
FRST
CPU5V
KR0-3
IC23 RESB
BU4094BCFV SO
SCK
EXST CB10
MSCK
CB11
MSO
CB12
CB13
EXP-
ANDER
CH
EEPROM EEPROM
SELECT
IC24 IC16 S1
HN58X2464TI HN58X2464TI EC10SP16-47
136-174 MHz
ANT
LPF
SW
Q22
DTA144EU
MUTE TMUT
SW
UNIVERSAL
CONNECTOR
J4
CONNECTOR
VCC
XTXD, XRXD, RES
PTT
MIC
MIC+
AFOUT
DETECT
SP+
INT SP
SP–
IC2
MC1
TC75S51F
EM-140
INT MIC
MIC
MIC
AMP
PTT
F0
F1
KEY
F2
MATRIX
F3
Q1, Q2 VCC
2SC4116BL
DS1-4
KEY DS6-9
LED DS11-12
Q3 DTC144TE SW DS14-15
LN1371G-(TR)
BUSY VCC
LED SW
BUSY LED
DS13
Q4 DTC144TE
LMJ310M6RA
TX VCC
LED SW
TX LED
DS5
LN210C6ARA
FRONT UNIT