Icom IC-4088SR - Block Diagram

SECTION 10 BLOCK DIAGRAM
10 - 1
ANTENNA
LPFHPF
TX/RX
SW
RF
AMP
BPF
XTAL
IF
AMP
IF
AMP
BPF
CERAMIC
X1:
CDBC450CX24
NOISE
DET
BUFF
DRIVE
AMP
PWR
AMP
MC300
KUC3523
PTT
S304
UP
S300
DOWN
S301
MODE
S302
POWER
S303
J303
J302
DC in
J301
X300:
CR-465
AF
AMP
AF
MUTE
+3
REG
LCD
SP300
SDRD-3650P
HSJ1493
HSJ1102
RV-244
R406
DS301:
CL-200YG
BATTERY
BT
BATT-SELECT
S305
D306:
RB551V
MATRIX
LPF
D/A
FIL
LOOP
D/A
D/A
LO
SW
VCO
REG
VCO
PLL
IC
1st MIX
FMDET SOUT
SHIFT
PTT SW
PTT
SENSE
VOL
MUTE
MIC
MUTE
BATT
T+3
R+3
R+3
CURRENT
AMP
T+3
CURRENT
AMP
+3V
CURRENT
AMP
LED
DRV
RESET
EEPROM
SENS SQL
UNKOCK
DATA, CK, STB
CHARG
POW
SW
6V/BATT
SW
VCC
D305: SB07-03C
Q314: 2SB1132
Q312: DTC144EU
D308: MA133
D307:
MA2S728
Q315: HAT1023RQ303: UMZ2N
D301: MA2S111
Q304: 2SA1586
D302,
D303: MA2S111 × 2
Q305: 2SC4116
Q308: 2SB798
Q319: XP4601
IC303: R1121N301B
IC302: R3112N281A
C3V+3V
CHG
V-SENS
Q318: DTC144YU
D317: MA2S111
VCC
SENS
+3V
Q302: DTA114EU
C3V
TEMP
SENS
C3V
TEMP HVIN
VIN
RESET
RXC
TXC
BPON
CHGC
AF
REG
AFON
AFV
AFV
MICIN
Q307: 2SA1362
D318: RB551V
Q306: 2SC4116
IC305: NJM2070 Q311: 2SC4213
RMUT
Q316: 2SJ144
PTTC MMUT
PTTS
Q317: DTC144EU
Q310: DTA113ZU
Q309: DTC114TU
Q313: 2SK1829
SCREMBLER
Pre-emphasis
De-emphasis
MIC-AMP
TONE-FIL
CTCSS
IDC-AMP
LPF
MICIN
AFOUT
CPU
IC301 : UPD789407A
D309, D310, D313:
MA2S111 × 3
VCO3
PSC VCC
Q10: 2SA1586
Q11: 2SC4116
D10, D11: MA2S111 × 2
PSC
IC300: BR24C02
IC304: AK2342B
MAIN
RF
D1, D2, D3, D4: 1SV308 × 4
Q1: 2SC4228
R+3
BPF
FI4: NSVS647
Q2: 3SK320
FI2: FL-297
Q3: 2SC4215
R+3
R+3
T+3
VCO3
VCO3
VCO3
Q4: 2SK3078A
T+3
T+3
IC3(2): BH2220FVM
Q5: 2SC3356
Q6: 2SC4228
D5: MA2S728
D6, D7: MA2S077
T+3 R+3
Q7: 2SC5108
VCO3
Q13: 2SC4226
Q8: 2SC5108
D8, D9: 1SV284 × 2
FIN
Q9: 2SC4117
SHIFT
IC2: UPD3140GS
PC
REF
OSC.
X2: CR-669
D12: HVC376B
21.25MHz
FC
IC3(3): BH2220FVM
+3V
MOD
BEEP
MOD
VOL
IC3(1): BH2220FVM
2nd Lo:
21.25MHz
FI3: CFWM450G
IC1: TA31136FN
TX: 446.00625 – 446.09375MHz
RX: 424.30625 – 424.39375MHz
TX/RX: 446.00625 – 446.09375MHz
1st Lo: 424.30625 –
424.39375MHz
1st IF: 21.7MHz
D6, D7: MA2S077 × 2
MUTE
Q14: 2SC4213
R+3
Q12: 2SJ144
BEEP
BUFF
3.6864MHz
NOTES :
Data line
Common line
TX line
RX line
Voltage line