![background image](http://html2.mh-extra.com/html/icom/d-star-id-4100a/d-star-id-4100a_service-manual_3516963034.webp)
SECTION 9
BLOCK DIAGRAM
9-1
UT8
VCC
PTT
SW
CPU3.3V
VR
ELEC.
MUTE
SP
PCON
98_DATA
SW
MIC_PTT
SW
3VS
5VS
FANHV
IDET
DETECT
CURRENT
NOISE
FIL
REG
DETECT
VT8
CLONE
REG
3.3V
3VS
MUTE
DET
TEMP
SW
VCOMOD
REFMOD
TEMP
8V
MICU,D
EXTMIC
PTT
MICE
MIC
GND
MICIN
UTX_C
VTX_C
BTAF
FM
DV
BTMIC
SW
DTMF
RECO
BTMIC
I SENS
MOD
MUTE
3.3V
VOX
SELECT
DIGI/AN
8V
BT3.3V
BT3V
REG
UT8
VT8
DSP
FLASH
ROM
RTC_SCL
microSD
CLOCK IC
Bluetooth UNIT
12.288 MHz
RTC_SDA
CLOCK
1
REALTIME
to CONTROL UNIT
SHIFT
3
CPU
SD_CLK
5
SD_CD
LIMIT
4
SD_CMD
6
2
CPU
RTC_IRO
232C
HV
SW REG
(5.5 V)
PSC
SW
LOWV
DET
PDV
ALARM
To BT
To CPU
REG
4.2V
CAP
SUPER
PWRSW
5
3
5.5V
to MAIN UNIT
CPU
6
VOL
+3.3V
1
4
SQL
2
12.288 MHz
+3.3V
CPU3.3
GPS
5V
POWER
CONTROL UNIT
MAIN UNIT
IC6
R3
R1
IC2
J4
IC310
Q306
IC313
Q301
IC309
IC320
IC306
IC311
IC323
C1340
IC314
Q303,D326
Q32,Q34
Q27,Q28
IC318
IC301,IC304
D304
J300
D335,D336,D328
IC300
IC307
IC100,Q100
Q151,Q152
Q102,D100
IC101,D101
IC101
IC308
IC405
IC112,D123,D124
IC104,Q154
IC112
IC100
IC112
IC104
IC20
IC312,Q304,Q305,D327
CLIN
CLOUT
IC106
AFMUTE
Q106
IC107
IC102
Q905,Q906
IC110
IC403
3.3V
REG
IC404
1.35V
REG
DSP3.3V
DSP1.35V
CLOCK
Q223
SHIFT
IC13
IC13
DAF
VCC
VCC
VOX
J301
UT-137
J3
B to B
CONNECTOR
CONNECTOR
B to B
IC324
CLSFT1
CODEC
LINEAR
12.288 MHz
X3
IC17
IC112
5V
IC319
REG
5V
S4~S11
KEY
LDIAL_B
LDIAL_A
BACK
LCD
LIGHT
KEY
BACK
LIGHT
IC103
IC103
IC12
IC12
IC14
D307,D309,D312,D314~D317
D321,D322
KEY9
Q12~Q14
DS14~DS21
Q6~Q8
IC5
RESET
SD_WP
SD_D0,SD_D1,SD_D2,SD_D3
RTC_RES
DSP3.3V
DSP1.35V
IC13
Q13
FM
DV
MAIN_DASEL
IC15
J305
DTMUTE
3.3V
REG
GPSC
CHG
IC303,D301,Q302
DS4~DS9,DS11,DS12
D325
#12,#13 Only
2
5
4
3
1
J25
5
3
1
4
2
5.5V
REG
SD3V
IC305
SD3.3V
J3
VDET
VIN
D351
D331,D333
SW
IC302
D352~D357
D332
D348~D350
DTCS
DTCS
SEL
DTCSSEL
Q149
DETECT
MIC
D340
D334
MICSEL
MICU/D
MICU/D
DETECT
D28,D251~D254
IC18
D302
Other
TX232
RX232
IC8
D3,IC7
LIMIT
D8,D9,D20,D21
D12~D14
D4,D18,D19
POWER
KEY DET
D338
SP1
DC1
W300
J100
1
2
3
4
5
6
7
8
PJ-3047S
J102
X300
BATTERY
BT300
HSJ1621-019011
J304
CR-839
X1
LS8J2M
S3
SW-170
S14
+8
REG
LEVEL
CONV
HPF
ALC
AMP
BUFF
D/A
LPF
IDC
AMP
LPF
DTMF
MUTE
AMP
BUFF
AF
AMP
LPF
HPF
AMP
LPF
PWR
CTRL
MIC
AMP
BUFF
ATT
AMP
EEPROM
MATRIX
RESET
+3
REG
LCD
COM
A
B
RESET