Icom IC-2730A Service Manual page 44

W300
NOISE
FANHV
FIL
HV
I SENS
UTX_C
D324 IC310
REVERSE
& OVER CURRENT
IDET
VOLTAGE DETECT
PROTECT
VTX_C
Q306 IC313
VCC +8
SW REG
Q301/Q308
PCON PWR
CTRL
Q302 IC325
VCC +8
SW REG
IC321 IC319
+8
5V
REG REG
IC320/IC324 IC314
LOW VOLTAGE
3.3V
DET
REG
IC311/D325/D332
3.3V
CPU3.3V
REG
PDV ALARM
To CPU To BT
IC306/D333
BT3V
BT3.3V
REG
CONT8V
MAIN UNIT
CONTROL UNIT
IC7 RX_DATA
TX_DATA
CTRL3V 3.3V
REG
8V
IC6
SW3C LEVEL
CONV
3.3V
REG
Q104
IC1
S14
2 L_DIALA
A
COM
3 L_DIALB
B
S15
2
R_DIALA
A
COM
3 R_DIALB
B
L.VOLV
R7
CPU
R.VOLV
R50
L.SQLV
R3
R.SQLV
R51
3.3V
3.3V
IC5
IC102
RESET
RESET
MIC
AMP
Q32/Q34
UT8 UT8 CTRLMIC
REG
BTMIC
Q27/Q28
VT8 VT8
REG
J100
8V
8V
1
MICU/D
2
EXTMIC
VCC 3
PTT
4
VCC2 MICE
5
MIC
6
GND
7
MICIN
8VS 8
5VS
3VS
IC300
IC301
EEPROM
MATRIX
D307/D309
D313-D317
D319/D321/D322
D304
X300
CLOCK
SHIFT
19.6608MHz
to CONTROL UNIT
MICE
1
2
GND
3
4 LEVEL
5 CONV
6 8V
Q307
J300
to MAIN UNIT
MICE
1
MIC
2
GND
3
4
5
8V
6
J6
KEY LCD
BACK BACK
LIGHT LIGHT
Q103,D103 DS2-DS9
DS10,DS13-17 D102
Q3-Q6
DIMMER1-4
LCD
DRIVER
IC2
S3 POWER S4 L.BAND
POWER
L_BAND
S5 L.V/MHz S6 L.M/CALL
L_V_MHz CTRL3V
L_M/CALL
S7 MONI S8 LOW
MONI
PTT
LOW DET
S9 MW S10 MENU
MW Q102
D100
MENU
S11 R.BAND S12 R.V/MHz
R_BAND
R_V_MHz LEVEL
S13 R.M/CALL CONV
R_M/CALL
IC102
D101
C_MICUD
C_MICSEL
C_MIC_PTT
C_98_DATA
IC307
IC100
Q100/Q150 Q151/Q152 IC100
BUFF
MIC MUTE
ATT
SW SW
IC101
MIC
AMP BTMICSW CMICMUTE MIC1 MIC2 MICMUTE
Q102/D100
PTT MIC_PTT
DETECT
Bluetooth UNIT
UT-133
J3
IC101/ D101
B to B
98_DATA
CONNECTOR
LEVEL
CONV
J301
BTAF
B to B
BTMIC
CONNECTOR
IC112/
IC308
RESET
CPU
DATA
CK
IC315/IC316/IC317
IOSTB
IOEN
EXT I/O
X3
3VS
TEMP TEMP
DET
J101
SP1
LCD
DS1
8V MIC8V J102
SW
Q7/Q8
SW3C
J101
8V
1
MICU/D
2
EXTMIC
3
PTT
4
MICE
5
MIC
6
GND
7
MICIN
8
IC112 IC112 IC103 IC102
HPF IDC LPF LPF D/A
Q149
DTCS FIL
SW
IC103
IC104
DTCS_SEL
BUFF
RPT
IC104 Q153
SW
DTMF DTMF
BUFF
MUTE
IC103
DTMUTE DTMFO BUFF
VRX_RPT URX_RPT
D123/D124
VOX
VOX
CPU3.3V
IC315 IC316 IC317
L_UVCOC L_PLLSW L_R5C
L_VVCOC L_MODMUTE L_VR5C
L_VCOSHIFT L_WN_SEL L_400S
R_VVCOC L_AMC L_UR5C
R_UVCOC R_PLLSW R_VR5C
R_VCOSHIFT R_WN_SEL R_UR5C
R_MODMUTE R_AMC R_400S
R_R5C
VCC
IC105 Q104 Q105
AF SP SP
AMP
MUTE MUTE
IC108
L_AFMUTE
AND
R_AFMUTE IC109 IC110
ELEC.
AFSW
VR
VCC2
IC106 Q106
AF
SP AF_SW AF_RSW
AMP MUTE
IC312/Q304/Q305/D327 IC107
CLIN
CLONE BTAF
BUFF
CLOUT
9-2
IC205
VCOMOD MOD
MUTE
IC103 IC205
REFMOD MOD
BUFF
MUTE
L_MODMUTE R_MODMUTE
Q112/Q139
AF
FIL
IC111
DETMUTE
Q113/Q140
AF
FIL
DTMFO L_RMUTE R_RMUTE