Block Diagram - Icom IC-M402 Service Manual

SECTION 10

BLOCK DIAGRAM

EXT.SP
OPTION
EXTERNAL SPEAKER
HM-129
MIC MIC
SMART MIC
INTERNAL
SP
SPEAKER
VR-B BOARD
5V
SQLV
X1: CR-691
9.8304MHz
KEY
BOARD
DS1:
TTR5341
MPU
LCD
IC1: HD6473847RH
Q11:
2SK1069 4
Q2: 2SC4116 BL
Q3: 2SB1132 R DIM LCD
Q4: 2SC4116 BL
CTRL CONT
EXTERNAL
IC4F:
IC7:
PC357N6T TC47HC14AF
IC5:
GPS
NMEA+ TC47HC02AF
PHOTO
GATE
BUFF
NMEA COUPLE
CTRL
CI-V
BUFF
I/F
Q6: DTC114EU
Q9: DTC114EU
D2: 1SS355
IC4B: TC74HC14AF
MIC
OPTION
VCC (HVS)
REMOTE MIC
AF/MIC
HM-127
PTTC
FRONT UNIT MAIN UNIT
WXDEC
IC6:
NJM2211M
PTT
DSDEC
LOGIC BOARD
IC3:
BU4094BCFV
RCV
IC9:
LA4425A
SEND
DECODER
&MULTI
SMUTE
MMUTE
IC6: Q26: DTC144EU
S-80942A NMP-DD6 D14: DA204U
PTTS
BEEPM
PTTM
RESET
BPLVLM
RMUTS
RMUTM
IC2:
HN58X2432TI
EEPROM
PTT
Q21: 2SC4116 BL
Q8: 2SK1069 4
DSENC
D/A BUFF
RMUTM
TMUT
HI/LO
TXDET
IC5A: BU4066BCFV
WXDEC
IC4A, IC4C:
TC74HC14AF IC5B: BU4066BCFV
Q5: 2SC4081 R
DSDEC
Q7: 2SA1576 R
Q10: 2SK1069 4
SQL
BPFV
RMUTS
BEEPM
BPLVL
10 - 1
FI3: ALFY450E
CERAMIC
BPF
IC1:
TA31136FN
Q28:
2SC4116 BL
FM 2nd IF 2nd
LPF
DET AMP MIX
DSC NOISE NOISE 2nd Lo
DECODER BUFF
AMP DET
SQL
X2: CR659
IC2:
PD3140GS
PLL
IC
VR-A BOARD
HVS (FRONT UNIT)
Q3:
2SC4116 BL
PWR
RIPPLE
AMP
FIL
VCO
D1, D2: MA77
D3, D4: HVD350
Q4: DTC144EU
Q5, Q6: 2SC4226 R25
LEVEL
LOOP
VCO
CONV
FIL
R5
IC7D:
NJM2902M
LPF
IC7B:
NJM2902M
MIC
HPF
AMP
MMUTE
IC4A:
BU4066BCFV
AF AF AF
MUTE MUTE MUTE
IC5D: BU4066BCFV
IC4B:
BU4066BCFV
IC5C: BU4066BCFV
AF AF AF
MUTE MUTE MUTE
SMUTE PTTS
Q18: DTC144EU
Q20: 2SK1069 4 D12: 1SS355
PTTM
GATE
BUFF
CTRL
PTT
BPFV
Q2:
Q1:
2SC2714 Y
FI1,2: FL310
3SK272 Q27: 2SC4226 R25
IF
XTAL RF
BPF
AMP
BPF AMP
Q10: Q11:
2SC3775 3 2SC3268
PRE
TX/RX YGR
SW DRIVE AMP
D5: MA77
D6: MA77
Q8: Q9:
2SC4215 O 2SC4215 O
TX
MUTE
BUFF BUFF
CTRL
Q14: DTC144EU
5V
Q7:
Q24: 2SA1588 GR
2SC4215 O
Q25: DTC144EU
SEND
T5
BUFF
CTRL
T5
Q22: 2SA1588 GR
IC7C:
Q23: DTC144EU
NJM2902M
RCV
RS
IDC CTRL
R5
DSENC
5V
IC4D:
BU4066BCFV
AF
MUTE
/PTTC
IC4C:
BU4066BCFV
AF
COMMON LINE
MUTE
PTTC RX LINE
Q19: DTA144EU
TX LINE
GATE
CTRL
LINE
DATA BUS LINE
ANT
LPF
Q17: 2SD1664 Q
D10: XB15A308
D15: XB15A308
HVS
ANT
BPF
SW T5
D8, D9: HSM88ASR
IC3:
SC-1302
RF OUT TXDET
PWR
AMP DET
Q12: 2SB1143 S
Q15: FMW1
HV
HVS
APC
CTRL T5
Q16: DTC144EU
TMUT HI/LO
PWR
CTRL
VR-A BOARD
(FRONT UNIT)
IC8: TA7805F
+5
REG
HVS
D11: DSA3A1
REVERSE
HV 13.8V
CONECT
PROTECT