Icom IC-M23 Service Manual page 23

SECTION 9. BLOCK DIAGRAM
Q608:2SJ347 F
CHASSIS
Q609:LDTC144TE DS247:RT3-239HRH16T
D612:L1SS400E DS248:SML-A12UT
WET FLASH
DET LED
HV
HV
BATTERY VOLTAGE
T
CHARGE
GND
BTEMPV
SP1
SP
INPUT DC 6.0V
Q 363:RSQ035P03TR IC602:NJM2853DL1
D359:LRB551 D601,D610:LRB551
PWR REG
CTRL 5V
I C601:NJW4100V
D603:LRB551
Q602:KTA1664
DCV
CMODE DC
DET
D604:
LM3Z3V0
Q353: Q606:
HV RSQ035P03TR RSQ035P03TR VCC
PWR PWR
CTRL CTRL
IC260D:
CD4066PWR
PWR
CTRL MUT E
PON D609:
L1SS400
DETMS
PWR PWSW
CTRL
Q354:LDTC144EE
D358:LDAN222
CLONE CLONE
SW
Q364:2SJ347 F
D360:LRB551 AFVS AF
ADJ CK POINT
Q 230:RSQ035P03TR
Q231:KTC811U
PSW D356:L1SS400
HV
HV
SP-
Q350:LDTC144TE
SP+ D350:KDS122
CLONE CLONE
MIC
GND
PTT
IC260A:
CD4066PWR
MC250
MIC
I NMI C
MUTE
ATX
MIC PTTM
CONT
Q250:LDTC144EE
PTTIN
S250
PTT
MAIN UNIT
M3V IC1:MB15E03SLPFV1
PLL IC
LOOP
FIL
REF
CR-766
Q3:3SK1069
X1
21.25MHz LOINV
BUFF
Q603: MOD
LDTC144EE
MODC
CRESET RESET
PLLO
2ND LO
CHARGE CTRL
IC170:
NJM2591V
LEDI-G LEDI-R
IF DET IC
DET
450KHz
X170
JTBM450CX70
IC365:
LMV358IPW
AF
LPF
MODC
FCON
BEEP
DE - VOLIN
ENPHA
BEEP
WDECV
IC190:
IC362: M62364FP
TPA0211DGN
AF
AM P
BEEP
IC200C:
LM324IPW
AM P
VCC
REG
IC200D:
IC200A:
LM324IPW
LM324IPW
LPF
(SPLATTER) LIMIT
AMP
ERXDO
ERXDI
EXTMIC
IC200B: IC260C:
LM324IPW CD4066PWR
AF AF
AMP
MUTE
MICMS
9 - 1
Q 21,Q22:KTC3770U
D 50,D51:
Q362:LDTC144EE Q23: Q24:
HVD144A
D22:HVB350BYPTL 2SC4215 2SC4215
LO
BUFF BUFF
SW
Q20:LDTC144EE
D 20:MA2S077G0
D 21:MA2S077G0
MOD R3V
MUTE
Q25:
2SC4215
BUFF BPF
VCO
450KHz
FI170:
BPF
LTM450FW
FI150:FL-368
Q151:
FI151:FL-399A
KTC3880S Q150:
3SK293
IF
BPF
AMP
21.7MHz
RSSI V
NOISV
AM P
IC365:
LMV358IPW
PLL DATA BUS
PCON
T1CON
BEEPI N
D/A IC
D/A contorl BUS
VCC
Q224:KTC811U
Q225:KTA1664
Q366:LDTC144EE
M3V
REG
3V M3VS
Q221:
L2SA1576AS
R3V
REG
PRE R3 R3VS
ENPHA
Q222:
L2SA1576AS
T3V
REG
T3 T3VS
A TIS
Q50: Q53: Q54:
KTC3770U RD01MUS2 RD07MUS2B
PWR
PRE PWR PWR
BUFF
DRIVE COMBINER
SPLITTER AMP
Q55:
Q365:LDTA144EE
RD07MUS2B
PWR
SHUNT
LOW AM P
I C50:LMV321IDCK
Q 357:LDTA144EE
TDETV
APC
CTRL
PCON
LOW
D131: D130: Q90: D93:
KDV214E KDV214E 3SK294 KDV214E
RF
BP F BPF BPF BPF
AMP
VCC
IC220:
NJU7772F03
CPU CPU3V
3V
IC341:
NJU7704F03A
CPU
RESET RESET
IC360:
UPD78F0338GC
EEPROM
IC340:S-24C64CI-T8T1U3
D356:L1SS400
ANTENNA
J1
D52:1SV307
D90:HVD144A
ANT
LPF
SW
T3V
D 91: Q351:
RB706F LDTA144E E
PWR T3V TX TXMS
DET MUTE SW
CMODE
LEDI-R
M ICG
LEDI-G
CRESET
D92:
KDV214 E
BEEPI WDEC V
AFVS RSSI V
T1CON
MICMS LOIN V
DETMS NOISV
ETXDO TEMPV
TXM S BTEMPV
TDET V BATTV
ERXDI PTTIN
ATTS EXTPTT
LOW DCV
PWSW PTTM
ATX PON
DS246:
4.9152MHz
TAK-35920
X360
CR-911
LCD
LEDS LED LED
SW
Q240: DS240,DS241:
LMUN5213DW1 SML-512WW
DS242,DS243,DS244,DS245:
LNJ426W83RA
KEY