Icom IC-A16 Service Manual page 32

• MAIN UNIT (2/3)
HV
MOD
LO
VCC
+5V
+3.3V
+5V
R273
4.7k
C377
Q35 C375
0.01
0.01
C376 2SC4215
0.1
D45
R277
100
1SS390
Q39
R287
470
LDTA144EE
Q25
1st IF
R292
LDTA144EE
Q37
C385
C409
2SC4215
0.01
0.1
R319
R316 R318
220k
22k 100k
IC14
2
1
3
NJU7057RB1
NARROW
WIDE
D21 R182
C239
1SS390 330 18P
VCC
+5V
+3.3V
R793
C193
10k
0.01
R154
100k
R795
DVDD RSSIOUT
25 16
DVSS PDOUT 22k
26 15 R140
VREFD DISCOUT
27 14 1M
AVSS3 AUDIOOUT C195
IC511
28 13
AGNDOUT NAMPI 0.001
29 SC-1451A 12
AGNDIN NAMPO
30 11 R300
LOCAP NRECTO
31 10
LOIN BIAS
32 9 470
33
C397 R148
0.01 150k
C206
390P
AM RX : 4.8 V
AM-Narrow RX : 0 V
D22 C230 R185
1SV308 0.1 390
AM RX : 0 V
C224
AM-Narrow RX : 4.9 V
0.1
Q27
0
2SC4215
D23 C231 R180
1SV308 0.1 220
Explanatory notes
TX Line
RX Line
Voltage Line (HV)
Voltage Line (VCC)
Voltage Line (+5V)
Voltage Line (+3.3V)
R222
8.2
R333
C269
8.2
R334
100P
8.2
Q30
C251 R201
R189 MP2
56
56P
RD01MUS2B
10 3621
Q28
2SC3356G
Q31
L2SA1576AS
RSSI
IC16
R209
+3.3V 5 1
VOUT VIN
2
VSS 0
4 3
NC ON/OFF
S-1200B33
C257 R203
12P 39
R5S
R800
0
R801
0
R193 C250
C714
100 0.1
10P
C255
R797 C275
0.001
Q29
0 18P
3SK293
R190 C248
100 0.1
9-3
TX : 5.0 V
RX : 0 V
TXV
HV
C329
220P
Q33
RD12MVS1
4.7k
+3.3V
Q521
R233
R248 R796
LDTC144EE
IC18
47k 47k
5
1
4
3
2
NJU7056F3
R242
22k
R227 C313
100 220P
HV
VCC
+3.3V
R228
0
R256
IC510
1 5
VIN VOUT
2
VSS
3 4
CE NC
XC6209F502MR
R241
10k
TX : 3.4 V
RX : 0 V
TX : 0 V
RX : 5.0 V
C324 C335
18P 2P
C300
0.001
Q34
R240
0
3SK293
* Refer to the PARTS LIST for the value and name of component.
MP5
3620
D38 C349
1SV307 0.001
C367
4P
C363
0.001
EP15
EP17
MPZ2012S221A
4 3
2 1
EP16
3621
MPZ2012S221A
1M
R268
5.6k
R270
470
C369
C348 C353
0.001
15P 220P
R267
100