Block Diagram - Icom IC-M73 Service Manual

SECTION 9.

BLOCK DIAGRAM

Q480:
RSQ035P03TR
VCC
PWR
BATT
CTRL TEMP
DET
POW
TEMPV
PWON PW IC432A:
VR UNIT
PWR LM2904PWR
PWSW CTRL
WDECV LPF
Q551:
LDTC144EE
D431:
LDAN222
VOLIN
IC260:
TC7W53FK
VOLOUT DE- ANALOG
ENPHA SW
GND
Q470:
LDTC144EE SPCTRL
BPCTRL BEEP
CTRL
BEEP
MIC UNIT
AFV
AFOUT
EXDET
EXTMIC
SPG
BUFF
RF UNIT
PTTIN
IC364:TC7WH14FK
Q350:L2SC4081
Q361:L2A1576AS
D350:L1SS400
AFVCTRL
PWR
CTRL
AFV
PTT Q230:RSQ035P03TR
Q231:KTC811U
Q401:LDTC144EE
CHASSIS AFV
SP
INTSP
Q430:
LDTA144EE
PTT
CONT
IC430A: IC430B:
CD4066BPWR CD4066BPWR
MC1
AF AF
MIC MUTE MUTE
PTTM VOXM
PTTM MIC VOX VOX
CONT AMP
Q250: IC431A: IC431B:LM2904PWR
LDTC144EE LM2904PWR D430
5V IC1:GP214D
3.3V PLL IC LOOP
FIL
REG
IC2:XC6221A332MR
X1:CR-766 Q3:2SK880
21.25MHz LOINV
BUFF
PLLO
MOD
MODCO
2ndLo
DET
IC280
TA7368PL
PWR X170:
AMP JTBM450CX70
MODCO
FCON
EXDET
ERXDI
ETXDO
VOXM
Vcc
AFVS
MOD
LPF
IC200A:
LM2902PWR
IC401
NJM2073M
PWR IC430D: IC504B:
AMP CD4066BPWR TC7W66FK
AF AF
MUTE MUTE
BEEP DETMS DETMS1
EXPTT
IC200B:
LM2902PWR
MIC
AMP
VOXT
:DA2S10100L
9 - 1
VCO
Q21:2SC4226 D50:HVD144A
Q22:2SC4226 Q23:2SC4215 Q24:2SC4215 D51:HVD144A
D22:HVB350BYPTL
TX/RX
BUFF BUFF
SW
Q20:LDTC144EE
D20,D21:HSC277TRF Q25:2SC4215
MOD R5V
BUFF BPF
MUTE
LPF
PLL DATA BUS
CERAMIC
BPF
IC170: FI170:
GT3136 LTWC450E1 Q151: FI150:FL-368
2SC4215 FI151:FL-363
IF DET IC IF
BPF
AMP
21.7MHz
Q150:
3SK293
RSSIV
NOISV
AMP
IC432B:
LM2904PWR
PCON
TCON/LOW
D/A control BUS
D/A IC MICO
MSENSE
IC200C: ATIS
LM2902PWR
AMP
IC200D:
ATISO LM2902PWR
PRE-
LIMIT
AMP ENPHA
IC500:LC703200AW IC504A:
TC7W66FK
NOISE CANCEL
AF
PLAY/REC IC MUTE
PLAYMS
FLASH
ROM
IC501:
LE25U40CMC
IC430C:
CD4066BPWR
AF
MUTE
MICMS
Noisecancel control BUS
Q50: Q53: Q54:
KTC3770U RD01MUS2 RD07MUS2B
PWR
PRE
BUFF
DRIVE
AMP
IC50:NJM2125F D91:
Q100:LDTC144EE RB706F
PCON
APC
PWR
TCON/LOW CTRL DET
TDETV
TXMS TX T5V
MUTE SW
Q351:
LDTA144EE
D131: D130: Q90: D93: D92:
KDV214EA KDV214EA 3SK294 KDV214EA KDV214EA
RF
BPF BPF BPF BPF
AMP
TCON/LOW
Q222:L2SA1576AS
T5V T5V
REG T5VS
5V
X480:
CR-834
7.9872 MHz
Q221:L2SA1576AS IC341:NJU7704F3
R5V R5V RESET
REG R5VS
Vcc
IC220:
NJU7772F05
CPU
Q225:KIA1664 5V
Q224:KTC811U
Q223:LDTC144EE
CPU5V
5V
5V REG M5VS IC340:S-24C64CI
EEPROM
BATTV
BATTV
DET
ANTENNA
D52:1SV307
D90:HVD144A
D353:DB2S31400
ANT
LPF
SW
RF UNIT
MAIN UNIT
EXDET BEEP
WDECV SPCTRL
VOXT AFVCTRL
RSSIV BPCTRL
LOINV AFVS
NOISV DETMS1
TEMPV PLAYMS
BATTV MICMS
PTTIN DETMS
EXPTT ETXDO
PTTM TXMS
PW TDETV
PWSW ERXDI
ATIS
DS480:
L2-1365TVF
LCD
IC360:
UPC78F0338GC DS240,DS241,
DS250,DS251:
SML-A12WT
DS242,DS243,
DS252,DS253,
LNJ426W83RA
CPU
BACK
LIGHT
Q240:
LDTC144EE
DRIVER
KEY