Icom IC-A16 Service Manual page 31

• MAIN UNIT (1/3)
HV
+5V
+3.3V
VOL
VOL
VIN
VIN
PCON
PCON
PATMP
PATMP
TXC
TXC
R5C
R5C
AMON
AMON
RSSI
RSSI
NOISE
NOISE
EMBI
EMBI
EXTREGC
EXTREGC
BTMICSW
BTMICSW
MMUTE PSTB
MMUTE
DASTB PDATA
DASTB
2365_SCK PCK
2365_SCK
2365_SDATA UNLK
2365_SDATA
2365_RST
2365_RST
2365_CSN
2365_CSN
ANLC
ANLC
FMON
FMON
ALCC
ALCC
FC
FC
PSTB
PSTB
PDATA
PDATA
PCK
PCK
UNLK
UNLK
BTMIC
BTMIC
SCK
SCK
SDATA
SDATA
MAIN UNIT
(3/3)
VCC
C402
0.0082
IC19
6
7
R305 R304
5
47k 47k
NJM2904CRB1
NJM2904CRB1
R17
C19
0.1 18k
C15 R16
BEEP
BEEP
DETO
DETO 0.1 220k
BTAF
AGCOFF
AGCOFF
NARROW
NARROW
WIDE
WIDE
PTT
PTT
VOX
VOX
JACKDET_G
JACKDET_G
AFON
AFON
AFC
AFC
AGC
AGC
CLONE
CLONE
AF volume minimum : 6.0 V
Other than the above : 0 V
R9
10k
Q512
LDTC144EE
Q523
RUE002N02
W10000
SP1
1
2
R36
1k
R11
0
15.3 MHz
C22
R31
R22
0.001 22 68k
C24
0.001
R298
1k
C393 C188
4P 10P
Q38
C390
47P
2SC5108
8
C400
IC19
V+
GND NJM2904CRB1 R29 R41
0.0056
4
IC19 820k 180k
2
IC4 IC4
1 2 R32
R303 R302 R301
3 1 7
470k
3 R33
47k 47k 47k
1k
NJM2904CRB1
NJM2904CRB1
C49 R45 R48
0.01 10k 15k
5
1 IC1
R3 C1
4
3
R7 1k 0.1
NJU7056F3
2
6.8k
Explanatory notes
TX Line
RX Line
Voltage Line (HV)
Voltage Line (VCC)
Voltage Line (+5V)
Voltage Line (+3.3V)
R671
33k When an external speaker is :
Connected : 2.7 V
Not connected : 0.6 V
IC3
1 8
Shutdown VOUTN
2 7
VREF GND
3 6
C53
MODE VDD
4 5
VIN VOUTP
220
ISD8102SYI
EP1 BLM15BD102SN1
MP3
MPZ2012S331A
1 2
3 4
3620
Q7 2SC4116
LDTC144EE Q515
R49
TX : 0 V
RX : 3.3 V 2.2k Q10 LDTA114EE
Q514
SHIFT
PLLSW LDTA114EE
R42
100
Q8
LDTC144EE
IC5
25 5 4
IC7
7 24
LD CPVSS
8 23
PDN2 SWIN
9 22 1 2 3 TC7S66FU
PDN1 CPZ
10 21
REFIN CP
11 20
TEST2 PVSS
12 19
R57
GPO1 BIAS R62
390 470
AK1542A
C58
0.001
VCC
+5V
+3.3V
R783
Bluetooth headset 10k
R784
TX : 5.0 V
10k
RX : 0 V
IC12
1 14
I/O1 VDD
6 2 13
O/I1 CONT1
3 12
O/I2 CONT4
5 4 11
I/O2 I/O4
AM RX : 0 V 5 10
CONT2 O/I4
6 9
FM RX : 5.0 V CONT3 O/I3
7 8
VSS I/O3
TC74VHC4066AFK
IC4
8
V+
GND R296
4
1M
NJM2904CRB1
Q9
LDTA114EE
TX : 5.0 V
Other than TX : 0.4 V
R55
C557
3.9k 1
IC6
C74
1 14
GAIN1 IN
2 13
GAIN2 GAINSW 0.047
C65 3 12
DET INT
1 4 11
OUT SENSE
5 10
BUFFIN VREF
6 9
BUFFGAIN V+
7 8
BUFFOUT GND
NJM2783V
EP6
[SP]
R75
EP4
1k
MPZ2012S331A
9-2
EP8
BLM15BD102SN1
RX-VCO
C105 C113
Q13
2SC5086
33P 33P
C128
0.75P
L2
4.7U
C140
EP7
Q15
2SC5108
BLM15BD102SN1
TX-VCO
C106 C114
Q14
2SC5086
47P
82P
C129
0.75P
MP1
3699
R785
D11 R135
10k
47k
DB2S31400
R121
C389
R127 R136
AM RX : 5.0 V 68k 0.0056
82k 150k
FM RX : 0 V
Q22
LDTC144EE
ANL (Automatic Noise Limiter) function
ON : 3.3 V
OFF : 0 V
C228
10
C415
R184
0.1 Q513
100k
LDTC114EE
C102
MOD30I
MOD30O
0.1
When VOX setting is ON
TX with an external microphone : 3.3 V
VOLO1
Other than above :
IC10
5 C119 C124
1
RB886CS
4
0.018 0.018
3
D8
2
NJU7056F3
R77
100k
* Refer to the PARTS LIST for the value and name of component.
HV
MOD
C143
0.001 Q17
2SC5108
C165
LO
15P
Q20
R118 C157
R108
47 9P
2SC5108
33P 15
VCC
+5V
+3.3V
+5V
R285
100k
R306
Q36
27k
2SC4215
R164
1M
C213
0.22
R155 IC14
6
7
10k
5
NJU7057RB1
Q26
R161
LDTC144EE
100k 8 IC14
V+
AM RX : 0 V
GND
4
FM RX : 3.3 V NJU7057RB1
MC1
4 1
OUT VDD
3 2
GND GND
SPU0410HR5H
Q23
LDTC144EE
D10
L1SS400
0 V
Q19
EXTREGC LDTC114EE
R122 R331
150
150
R128 R332
AGC
150 150
When VOX setting is ON AGCOFF
TX with an external microphone : 7.0 V
Other than above : 0 V
J3
R106 D9 [MIC]
EXTPTT
15k L1SS400