Icom IC-M401EURO Service Manual page 31

SECTION 10 BLOCK DIAGRAM
EXT.SP
OPTION
EXTERNAL SPEAKER
HM-132
MIC MIC
SMART MIC
INTERNAL
SP
SPEAKER
VR-B BOARD
5V
SQLV
X1: CR-691
9.8304MHz
KEY
BOARD
DS1:
LCD MPU
TTR5341
IC1: HD6473847RH
Q11:
2SK1069 4
Q2: 2SC4116 BL
Q3: 2SB1132 R
DIM LCD
Q4: 2SC4116 BL CTRL CONT
EXTERNAL
GPS
DATAS
Q6: DTC114EU
CI-V
Q9: DTC114EU
BUFF
I/F DATAM
D2: 1SS355
IC4:
TC47HC14AF
PHOTO
COUPLE
IC7:
PC357N6T
Q5: 2SC4081 R
Q7: 2SA1576 R
OPTION
DSC terminal DSC+
DSC
DS-100
VCC
FRONT UNIT MAIN UNIT
PTT
IC13:NJM2125F
SQL
LOGIC BOARD
IC3:
BU4094BCFV
RCV
IC9:
LA4425A
SEND
DECODER
&MULTI
PTTM
RMUTM
Q26: DTC144EU
IC6:
D14: DA204U
S-80942A NMP-DD6
BEEPM
RESET
BPLVLM
IC2:
HN58X2432TI
EEPROM
PTT
Q8: 2SK1069 4
ATIS
D/A
BUFF
TMUT
HI/LO
TXDET
SQL
BPFV
BEEPM
BPLVL
RIIFF
10 - 1
FI3: CFWS45QF
CERAMIC
BPF
IC1:
TA31136FN
FM 2nd IF 2nd
DET AMP MIX
NOISE 2nd Lo
NOISE
AMP DET BUFF
SQL
AMP
X2: CR659
IC2:
PD3140GS
PLL
IC
VR-A BOARD
HVS
(FRONT UNIT)
PWR
AMP
VCO
D1, D2: MA77
D3, D4: HVD350B
5V
Q4: DTC144EU
Q5, Q6: 2SC4226 R25
LEVEL
LOOP
VCO
CONV
FIL
R5
IC10B:
NJM4558M
LPF
RMUTM
IC12A:
IC11A:
IC12B:
2SB1202 S NJM4558M
TC4W66FU
AF
MIC
AF
MUTE
AMP
MUTE
Q18: DTC144EU
Q21:
2SC4116 BL Q12: 1SS355
GATE
HPF
CTRL
PTTM
MIC
PTT
Q29:
2SC4116 BL
DSC+
HPF
BUFF
DSC
BPFV
Q2:
F11: FL310 Q1:
2SC2714 Y
Q27: 2SC4226 R25
F12: FL310 3SK272
IF XTAL RF
AMP BPF
BPF AMP
Q10: Q11:
2SC3775 3 2SC3268
TX/RX PRE YGR
DRIVE
SW AMP
D5: MA77
D6: MA77
Q8: Q9:
2SC4215 O 2SC4215 O
TX
MUTE
BUFF BUFF
CTRL
Q14: DTC144EU
VCC
Q7:
2SC4215 O Q24: 2SA1588 GR
Q25: DTC144EU
IC8: TA7805F
SEND
BUFF T5 +5
CTRL
T5 REG
IC7C:
NJM2902M
Q22: 2SA1588 GR
IC10A:
ATIS
Q23: DTC144EU
NJM4558M
RCV
MIX RS
R5 CTRL
5V
COMMON LINE
RX LINE
TX LINE
LINE
DATA BUS LINE
DSC
ANT
LPF
D10: XB15A308
D15: XB15A308
ANT
BPF
SW T5
IC3:
SC-1302
D8, D9: HSM88ASR
TXDET
PWR RF OUT
DET
AMP
Q12: 2SB1143 S
VCC
Q15: FMW1
VCC
APC
CTRL T5
Q16: DTC144EU
TMUT HI/LO
PWR
CTRL
VR-A BOARD
(FRONT UNIT)
RL1: FTR-P3CP012W1
D18: 1SS355
HVS
PWR
LIRL
D11: DSA3A1
REVERSE
EMI HV
CONECT
FIL
PROTECT
F14: NFM60R20T152
F15: NFM60R20T152