Icom IC-M302

SECTION 10 BLOCK DIAGRAM
10 - 1
LOGIC BOARD
MAIN UNIT
FRONT UNIT
VR BOARD
SQL BOARD
X1
CR–769
7.9872 MHz
ANT
LPF
ANT
SW
PRE
DRIVE
TX/RX
SW
XTAL
BPF
YGR
AMP
PWR
AMP
NOISE
AMP
NOISE
DET
APC
CTRL
PWR
CTRL
LPF
BUFF
BUFF
X2
CR–768
21.25 MHz
FIL
LOOP
LPF
BUFF
BPF
SP1:
045P0803
CI–V
I/F
BPF
CERAMIC
BPF
AF
AMP
BUFF
RF
AMP
IF
AMP
AF
MUTE
R1:
TP96N97N–15SK–10KA–2685
R1:
TP96N97N–15SK–10KB–2685
R184 RV–110
+5
REG
R135 RV–143
BUFF
BPF
ATT
BUFF
H/L
DSCDEC
WXDEC
SEND
RCV
HVS
RMUTE
TMUTE
DSCENC
TXDET
H/L
BPF
DSCENC
BPF
KEY
BOARD
DIM
CONT
LCD
EEPROM
RESET
RF OUT
DET
2ND
MIX
FM
DET
2ND LO
BUFF
TX MUTE
CTRL
HVS
VCO
IDC
PHOTO
COUPLER
NMEA+
NMEA–
External GPS
HM–141
CLONE
IC1: TA31136FN
DSC
DECODER
21.7MHz
FI1,FI2:
FL–363
Q2:
3SK131 L
Q1:
3SK131 L
Q4:
2SC4215 O
FI3: ALFY450E
IC8:
UPD3140GS
PLL
MOD
IC1: M37560MFA–303GP
CPU
DS1:
IS08251E00V0
Q2: 2SB1132 R
Q3,Q4: 2SC4116
IC4:
BR24L32FV–W
IC5:
BD5242FVE–TR
IC2: PC357N6T
IC3:
TC7S14FU
Q5:
2SC4116 BL
IC6:
LA4425A
IC2C:
NJM13403V
IC2D:
NJM13403V
IC2A:
NJM13403V
IC3:
NJM2211M
Q13,Q14: 2SC4226 R25
D11,D12: MA77
D13,D14: HVC350B
Q15:
2SC4215 O
Q26:
2SC4215 O
Q16:
2SC4215 O
D16,17:
MA77
Q17:
2SC4215 O
Q18:
2SC4226 R25
Q20: DTC144EU
IC4:
S–AV35
D21,22:
HSM88ASR
Q21: FMW1
Q23: 2SA1577 Q
D1,D2:
XB15A308
D2: 1SS355
Q6: DTC114TU
IC7B:
TC4W66F
MIC
MUTE
PROTECT
D25:
DSA3A1
HVS
T5
CTRL
Q35: 2SB1132 R
Q36: 2SC4116 BL
HV
REVERSE
Q33: 2SC1577 Q
Q34: DTC144EU
T5
5V
CONNECT
R5
CTRL
Q31: 2SA1577 Q
Q32: DTC144EU
R8
R8
REG
R5
Q22: DTC114EU
IC6 A: NJM2904 M
2nd LO
IC7A:
TC4W66 F
MIC
AMP
IC2B:
NJM13403V
IC9: TA7805 S
EXT SP
INT SP
IC6 B: NJM2904 M
2ND IF
AMP
Voltage line
NOTES :
Common line
TX line
RX line