Block Diagram; Front Unit - Icom IC-F620 Service Manual

SECTION 10

BLOCK DIAGRAM

8V
Q18
2SK880
LVIN BUFF
REF
X2
IC4
CR-671A D20 MA2S111 SA7026DH
Q19 SC4215
BAL
LOOP
AMP PLL IC
IC11 15.3 MHz
TC75S51F
PLST FRACTIONAL N
D21
SO
HVC362
x3
SCK
UNLK
Q34
2SC4116
MOD
45.9 MHz
DET
IC21
NJM12902V
SDEC
LPF
IC5
NJM12904V
CDEC
RESTO-
LPF
RATION
FIL FIL
SW SW
Q35
IC22
XP1214
TC4S66F
DUSE
B
MOD
BAL
REF
D/A
TENC
MICI
J1
BEPO SCK
SI
SIGOUT SO
CCS
AFONO CIRQ
BUSY
REM RMUT
OPTION
UNIT
MMUT
OPT1
MCIN
OPT2
MCOT
OPT3
OPV1 (APST)
PTTI
OPV2 (AMSK)
PTTO
OPV3 (AFCL)
J8
NTXD
D35 DAN222 NRXD
GPS
D36 DAN222
D37 DAN222
PROG PGI1-3
Q44 DTC144EU
IO PGO1, 2
IGSW
J9
XTXD
FLAH
XRXD
MAP27
Q42
DTC144EU 232C
XCTS
USB
XRTS
RES
MD1
D26 MA2S111
Explanatory notes
Q31 2SJ144
J6
IN
LINE
DATA BUS LINE
SW
DISC DET
ACC
CONTROL LINE
PTT
HORN HORNO
COMMON LINE
SW
Q32 DTC144EU
TX LINE
DIM
RX LINE
Q17 2SC4116 Q16 DTC144EU
D19 MA2S111 Q15 XP1214
VCO TXC
RIPPLE
SW
FIL
RX VCO Q13
D16 HVC350B 2SC4226
Q11
2SC5107
BUFF
FIL
TX VCO
D17 HVC350B
Q14
2SC4226
D18
MOD
MA368 Q12
2SC5107
LPF BUFF
BPF
IC1
TA31136FN(D) Q4
2SC4215
SECOND MIXER
IF AMP AMP
SQL AMP
DETECTOR
NOIS RSSI
450 kHz
X1
CDBC450CX24
CERAMIC
NWC
W/N BPF
Q20
SW
2SC4213
FI2
Q5 2SC4116
ALFYM450F=K
FIL FSW
Q6 DTA144EU
SW
IC21
NJM12902V
HPF AMP LPF
MSK
MSK
HPF BPF
MOD
DEMOD
IC6
M62364FP
CTCS
MICO
COMPRE
AMP LPF HPF
SSOR
DAST
SCK
COMPANDER
X3
SO
IC14
CR-563
ATRD SO
TC35453F
3.58 MHz
AMSK ARTM
ADIN ARDT
SCK AFCL
APST
Q27 2SB1132
Q28 XP6501
+5
5V
REG
D24 DA221
Q30 DTC144EU
Q26 2SD1664
R8
R8V
REG
D23 DA221
Q29 DTC144EU
Q25 2SD1664
T8V T8
E REG
SIGOUT SIG
D IC9 TA7808F
8V +8
REG
F
MOD
VCC
EPTT
DIM
SW
Q33 DTC144EU
10 - 1
MAIN UNIT
Q10 D14, D15
2SC5107 MA77
TX/RX
BUFF
SW
LPF
RX LO
353.65-473.65 MHz
RSSI
FI1
FL-335 [EUR]
[USA], [GEN]
FL-313 Q3 D10 HVC350B D9 HVC350B
3SK272
46.35 MHz
XTAL
BPF BPF
BPF
MIXER
T4 T3
Q22
DTC144EU
W/N NWC
SW BEEP
BEEPO
TONE
IC21
NJM12902V
LPF
EXPAN
HPF AMP AMP
DER
LIMIT
LPF PM/FM
AMP
IC15
TC4W53FU
A
BUFF AMP
Q21
2SC4116
MCIN MCOT
(J1)
(J1)
DTMF LINH
SW
DEC
IC19
LC73872M
DDSO Q43 DTC144EU
DDAC
DDST
Q36
2SC4116
SENC
TONE LPF
CENC0
Q37
CENC1
2SC4116
CENC2
TXC
TENC
LPF
REM
Q38
DTC144EU
TMUT DUSE
FIL
SW
Q23
+5
2SJ377
REG
Q24
DTC144EU
POWER
SW
PWR PROTECT
PWON
SW
MD1 D22
DSA3A1
D28 DAN222
Q41 DTA144EU
IC3
RA30H4047M [L]
RA30H4452M [M]-25W, [H]
Q9 Q8
RA45H4452M [M]-45W
2SC5107 2SC3356
YGR PRE PWR
LPF
AMP
AMP DRIVE
D25 MA2S111
Q1 2SK1829
GATE
CTRL
D4 HVC350B D8 HVC350B
RF
BPF BPF
AMP
Q2
3SK293
T2 T1
IC6
M62364FP IC18
TA75S01F
AF
D/A AMP
AMP
AFON
AF
AFONO
MUTE
IC25
TC4S66F
Q39 DTC363EK
MOD J6 PAAF
Q40 DTC144EU
D31 DAN222
Q49 Q50
DTC144EU DTC144EU
PA
SW SW SW
MICI
Q48
DTC144EU
SIG
CTCS
AMP
TONE
IC21
NJM12902V
PTTI (J1)
IC7 C
M62334FP
PTTO (J1)
D/A
SCK
DSDA
LINH, LCS, LCK, LSO
HORN
FSW
IC20
HD64F2268TF
CPU
KR0-KR2
IC24
S-80942ANMP-DD6
RES
RESET
CPU5
POSW
IC10 CSFT
AN78L05M AFVI
ESCL
W2 ESDA
OPC-453
SHIFT
SW
HV X4
CR-520
D27
19.66 MHz
MA77
EEPROM
IC23
HN58X24128FPI
400-520 MHz
D2 UM9401F
D5 MA4PH224 D1, D11
D6 MA77 MA728
ANT PWR
LPF LPF
DET
SW
D32
MA2S111
IC2
TC75S51F MUTE TMUT
SW
APC
AMP
D33 T4
MA2S111
J4
IC8
LA4425A
G H
SP+
INT SP
SP-
IC2
J1
TC75S51F
AFO MIC JACK
AF
MIC
AMP
D1, D2, D3: RB706F-40 CLO CLI
PTT
LCD
DS12
L1-0483TAT
SEG1-40 8V
COM1-4
DS7-DS11
SML-311YT
Q1, Q4: DTA144EU
LCD DRIVER
Q2, Q3: DTC144EU
DIM1
IC1 8V
DIM2 LED
LC75824W
SW
DS1-DS6
SML-311YT
KS0-KS2
P0-P4
KEY MATRIX
UP∗2
DN∗2
D4, D5, D6: MA2S111
PWR
AF VR

FRONT UNIT