Block Diagram; Main Unit; Front Unit - Icom IC-F50 Service Manual

SECTION 10

BLOCK DIAGRAM

Q18:
2SK880
LVIN
BUFF
X2
CR–763
IC5:
NJM12902 15.3 MHz
BAL
LOOP
TCXO
BUFF
REF
FIL
Q34:
2SC4116
IC4:
MB15A02
PLL
X 3
LPF
IC
2nd LO
IF IC
=45.9 MHz
BPF
IC1:TA31136FN
X1
CERAMIC
BPF
SQIN
CDBC450CX24
ALFYM450F
450 kHz
DET
LVA, T1, T2
MOD
D/A
DET
AMP
IC6:
M62363FP IC11:
TC4W53FU
FM/PM
LPF
SW
CTCSS/DTCS
IC5:
MSK
NJM12902
Modulator
MOD
LPF
TONE
CTCSS/DTCS DEC
IC5: IC5:
NJM12902 NJM12902
DET
CDEC
LPF AMP
IC403:
NJM12902
SENC0–3
LPF
IC403:
NJM12902
CDCS CENC0–2
LPF
Q408:
DTC144EU
FIL DUSE
SW
S5V
Q17: Q15: XP1214
2SC4116 Q16: DTC144EU
Q13: 2SC4226
D16: HVC350B VCO
RIPPLE
FIL D22: SW
HVC350B RX VCO
LV
ADJ Q11:
2SC5107
LV
BUFF
D21:
HVC350B TX VCO
LV
ADJ Q12:
Q14: 2SC5107
2SC4226
D17: HVC350B
BUFF
D18:
FM MA368
LVA MOD
Q4:
2SC4215
FI2
RSSI NOIS
LPF EXPANDER
SCRM
HPF
BLER
LIMIT
COMPRESSOR
AMP
MSK IC10:
BPF
DE–Modulator AK2346
IC7:
EW–460
X4
CR–765
3.6864 MHz BATT
LPF
+5V SELECT
D404:
X401 MA2S077
CR–764
CSFT
19.6608 MHz SHIFT
SW
CPU
IC401: HD6432264F01TF
10 - 1
R5V

MAIN UNIT

Q9:
Q10: D14,D15:
2SC5107 MA2S077 2SC5107
TX/RX YGR
BUFF
SW
AMP
RSSI
LPF 1st LO=
353.65 MHz–473.65 MHz
FI1: D10: D9:
FL–335 Q3: HVC350B HVC350B
1st IF=
3SK299
46.35 MHz
IF XTAL
BPF BPF
AMP BPF
1st Mixer
T2
SIGNAL
Q28:
IC13:
DTC144EU
BU4066
SHIFT
SW
AMP
IC14: IC15:
FX214LG TC3W03FU
CSFT
ANALOG
SCRM
1/4
SW BLER
X3
CR–746
AMP
4.00 MHz
Q21:
2SA1577
T5C
T5 T5V
R5C REG
Q23: 2SB1132
Q24: XP6501
Q22:
Q25: DTA144EU 2SA1577
S5C
R5 R5V
S5
REG
VCC REG
IC12:
BU4094 S5V
+5
+5V
EXPANDER
REG
IC9:
NJM2870
IC410:
BU4094
EXPANDER

FRONT UNIT

IC408:
BD5242G
RES +5V
RESET
CPU5
IC409:
24LC64T
EEPROM
Q5: Q8: Q7: D2: 1SV307
2SC3356 RD01MUS1 RD07MVS1 D5: MA2S077
YGR DRIVE
PWR ANT
LPF
AMP
AMP AMP SW
Q1:
IC2:
2SK1829 TA75S51F
GATE APC
CTRL AMP T2
TMUT
MUTE
SW
D3,D4:
D7,D8:
HVC350B ×2 HVC350B ×2
D38:
MA2S111
RF
BPF BPF
AMP
Q26:
Q2: TCP6103
3SK293
VCC
POWER
T1 SW
IC406:
IC403: IC405:
TC7W66FK NJM12902 TA7368F
AF VOL
AF
AF
LPF
MUTE AMP
Q401: 2SB1132
Q402: XP6501
PWR
CTRL
SPON
IC406:
IC407:
TC7W66FK
NJM12904
MIC
AMP
MUTE
DS402,DS403
SML–310MT ×2
DS404,DS405
SML–A12MT ×2
Q407: DTA144EU
D401: MA2S111
Q409: XP4111
D402: MA2S111
LED PTT
G CTRL DET
R
DS406:
CL–165HR
RESET
DETECT
400–520MHz
LPF
PWR
DET
D1,D39:
RB706F ×2
F1
1 2
AFO SP1
Q403: 2SC4116
AF Q404: RSR025N03
MUTE Q405: RSR025N03
Q406: DTC144EU
SPON
MC1
PTT
CONNECTOR
AFO
MIC
PTT
VCC
RESET
DETECT
CLI CLO
LCD
NOTES :
Voltage line
Contorol line
Common line
TX line
RX line
DATA lime