Icom IC-M91D Service Manual Addendum page 35

SECTION 9. BLOCK DIAGRAM
CHASSIS
Q391:
DET PIN
Q390:2SJ347 LMNU5213DW1
WET WET
DET SW
WETIN
Q353:
RSQ035P03TR
VCC
HV PWR
CTRL
GND
PWR
SP
CTRL PWSW
SP1 Q354:LDTC144EE
D358:LDAN222
PON
SP
MIC
AF
AMP
TDA8547TS
IC362:
AF AF
AMP
CLONE
TDA8547TS
MIC IC362:
GND
J291 SP/ESP AF
SW REG
Q371: Q230:TPC6103
LDTC144EE Q231:KTC811U
SPON
DISTRESS
AFV
SW
DIST
S251 Q370:LDTC144EE
LED LEDV
DS246,DS247: BUFF
LNJ426W83RA
PTT
IC364:TC7WH14FK
Q350:L2SC4081
PTTIN Q361:L2SA1576AS
S250 D350:L1SS400
PTT
CONT
Q251:2SA1832GR
RF
MIC
IC260A: IC200B:
CD4066BPWR LMV324IPW
MC1
INMIC AF
AMP
MUTE
MC250 MIC
PTTM
Q250:
LDTC144EE
PTTM MIC
CONT
9 - 1
RF M5V
IC1:GP214D
PLL IC
3.3V
REG
IC2:NJU7772F33
REF
CR-921
X1
21.25MHz
WDECV DSCOUT1 DTEST DSCIN
DSC DSC
SW DEC
IC366 IC365
TC7W53FK NJM2211M
IC363D:
LMV324IPW
LPF
MUTE
IC380: IC363A:
TC7W53FK LMV324IPW
MUTE T5VS
SW NC
AMP
SW
Q400:
LDTC144EE
8.192MHz
X200
IC200C: NOISE CANCEL IC
LMV324IPW
IC382:
BEEP LC70301W
AMP
VCC
1.1V
AFVS
IC260D:
CD4066BPWR
AFVCTRL AF
LPF
MUTE
IC363C:
LMV324IPW
RINTM
CLOTXD
CLORXD
MAIN
EXPTTIN
CHASSIS
EP2:
PGS4ER-CX-412
GPS MODULE
Q21,Q22:KTC3770U
Q23: 2SC4215
D22:HVC350BYPTL
LOOP
BUFF
FIL
Q20:LDTC144EE
D20:HSC277TRF
Q3:2SK880
D21:HSC277TRF
LOINV MOD R5V
BUFF
MUTE
MOD
Q25:
MODC 2SC4215
PLLO
BUFF
2ND LO
450KHz
FI170:
BPF
LTM450FW
DET
IC170:
NJM2591V
Q151:
KTC3880S
IF DET IC
IF
AMP
RSSIV
450KHz
X170
JTBM450CX70
MODC
T1CON/PCON
FCON
MICMS
D/A IC
D/A contorl BUS
AF MICO DSCOUT1
MUTE
IC260C: IC190:
CD4066BPWR M62364FP
VOL
RF
DE-
ENPHA
VCC
M5V CPU3.3V
PRE REG
LIMIT
LPF
AMP ENPHA 5V M5VS
IC200D: IC200A: Q224:KTC811U
LMV324IPW LMV324IPW Q225:KTA1664
Q363:LDTC144EE
Q221:L2SA1576AS
Q365:LDTC144EE
R5V
REG
R5 RVS
Q222:L2SA1576AS
Q364:LDTC144EE
T5V
REG
1.8V T5 T5VS
IC372:
SN74AUP1T17DCKR
LEVEL LED
CONVERT
DS240,DS241,DS247:
SML-512WW
DS242,DS243,DS244,DS245,
DS248,DS249:
LNJ426W83RA
GPS control BUS
Q24: D50,D51: Q50: Q53: Q54:
2SC4215 HVD144A KTC3770U RD01MUS2 RD07MUS2B
PRE
TX/RX PWR
BUFF BUFF
DRIVE
SW AMP
IC50:NJM2125F
Q357:LDTC144EE
VCO
APC TDETV
BPF
CTRL
PCON
LOW
FI150:FL-368 D131: D130: Q90:
FI151:FL-399A KDV214EA KDV214EA 3SK294
RF
BPF BPF BPF
AMP
Q150:
3SK293
21.7MHz
NOISEV
AMP
IC363B:
LMV324IPW
PLL DATA BUS
Noise cancel control BUS
VCC
1.8V
REG DC
5V DC 1.1V
IC384: IC383:
NJU7772F05 TPS62400DRCR
CPU CPU3.3V
CPU
3.3V
IC220:
NJU7772F33
IC360:
STM32F100ZET6B
IC341:
NJU7704F3
RESET RESET
EEPROM
IC340:
BR24T256J
DIM DIMM
CTRL
Q240: KTA1664
Q382:L2SC4081
D359:DZ2J033M0L
LEDV
J1
D52:1SV307
ANT
LPF
SW
T5V
Q366:LDTC144EE
D91: Q392:LDTA144EE
RB706F
TXMS
PWR TX
DET
MUTE SW
D93:
KDV214EA
D92:
KDV214EA
BPF BPF
T1CON
AFVCTRL EXTDET
WETIN WDECV
BEEP RSSIV
AFVS LOINV
MICMS NOISEV
RINTM TEMPV
TXMS BATTV
DTEST PTTIN
SPON EXPTTIN
LOW PTTM
PWSW PON
DSCIN DSCOUT1
TDETV DTEST
8803L22022
7.9872MHz DS246:
X360
CR-834
X360
KEY
COMMON LINE
RX LINE
TX LINE
CONTROL LINE