Icom IC-A16 Service Manual page 33

• MAIN UNIT (3/3)
IC501
8
1
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5 ECK
VSS SDA
EDATA
GT24C128B
R776 R774
1M 0
X501
CR-995
19.6608MHz
THERMC
IC512
R779
1 5
CD VDD
2
VSS 10k
3 4
MR VOUT
NJU7704F3
R632
NTCG16
R551
1M
R549
1M
R546
1M
R543
1M
KR0
KR1
KR2
KR3
KS0
KS1
KS2
KS3
+5V R806
10KEY_LED 10
BTRXD
FRONT UNIT BTTXD
BT_DEMP
CPU_DEMP
BTTEST
H_PTT
BT_SW
HOPC
BTAF
BTMIC
HV
Q511
JACKDET
When an external speaker is :
LDTC144EE
Connected : 1.6 V
Not connected : 3.3 V
R782
10k
PSWO 1
PE2
PSWIN 2
PE3
3
SCFCLK
PE4
4
PE5
5
PE6
6
VLCD
7
PC13
8
PC14-OSC32_IN
9
PC15-OSC32_OUT
10
PH9
RESET2 CSHIFT 11
PH10
12
PH0-OSC_IN
IC500
13
PH1-OSC_OUT
14 STM32L073VBT6
RESET
NRST
R781
A/D 15
PC0
PATMP A/D 16
PC1
VOL A/D 17
PC2
VIN A/D 18
PC3
19
VSSA
1k
20
VREF-
21
VREF+
22
VDDA
23
PA0
24
PA1
25
PA2
BTRXD
BEEP
BEEP
FC FC
C697
0.001
C698
0.001
C699
0.001
C704
0.001
R780
1k
BTRXD
BTTXD
BT_DEMP
CPU_DEMP
BTTEST
H_PTT
[PTT] [SQL ▼]
BT_SW
HOPC S503
TAFG-12W
PSWO
PSWIN
75
VDD_USB
74
VSS
73
VDD
72 SWDIO
PA13
71 2365_SCK
PA12
70 2365_SDATA
PA11
69 CLIN
PA10
68
CLOUT
PA9
67
AFON
PA8
66 DASTB
PC9
65 TXC
PC8
64 SCK
PC7
63
SDATA
PC6
62
MMUTE
PD15
61 EMBI
PD14
60 LOCK
PD13
59 SQLUP
PD12
58 SQLDN
PD11
57
INTPTT
PD10
56 LIGHTC
PD9
55 LINH
PD8
54 LSO
SPI2_MOSI
PB15
53 LSMD
SPI2_MISO
PB14
52
SPI2_SCK LSCK
PB13
51
LCS
SPI2_NSS
PB12
INTPTT
SQLDN
SQLUP
LOCK
LIGHTC
LSMD
[SQL▲]
LCS
S502 S504 LSO
LSCK
[ ] LINH
TAFG-12W
EVQ-PUL
9-4
D508 R641
L1SS400 10
Q517
IC505
5 1
VOUT VIN
2 RZM002P02
VSS
4 3
NC CE
XC6209F332MR
Q518
Q520
Transceiver power is ON
LDTC144EE
RUE002N02
When battery voltage is 7.2 V : 3.3 V
When battery voltage drops to 4.5 V : 0 V
¬ Power automatically turns OFF
Q519
RUE002N02
Q504
R637
D509
18k L1SS400
2SA1832
CLIN
IC504
1 6
1A 1Y
Q505
2 5
GND VCC R638
CLOUT 3 4
2A 2Y
12k
SN74LVC2GU04DCKR 2SC4738
SEG18 SEG31
SEG29 SEG12
SEG17 33 16 SEG32 DS503
SEG30 SEG11
SEG16 34 15 SEG33
SEG31 SEG10
35 14
SEG15 SEG34
SEG32 SEG9
36 13
SEG14
SEG33 SEG8
SEG13 37 12
SEG34 SEG7
SEG12 38 11
SEG35 SEG6
SEG11 39 10
IC503
SEG36 SEG5
40 9
SEG10
SEG37 NJU6434KS4 SEG4
41 8
SEG9
SEG38 SEG3
SEG8 42 7
SEG39 SEG2
SEG7 43 6
SEG40 SEG1
SEG6 44 5 COM1
SEG41 COM4
SEG5 45 4 COM2
SEG42 COM3
46 3
SEG4 COM3
SEG43 COM2
SEG3 47 2 COM4
SEG44 COM1
48 1
SEG2
SEG1
R767
Backlight
0
ON : 3.3 V
OFF : 0 V
Q503
RUE002N02
R772
100k
10KEY_LED
+5V
BTAF
BTMIC
+3.3V
* Refer to the PARTS LIST for the value and name of component.
HV MAIN UNIT
(1/3)
VOL
VOL
VIN
VIN
PCON
PCON
PATMP
PATMP
TXC
TXC
R5C
R5C
AMON
AMON
Transceiver power RSSI
RSSI
ON : 5.2 V
NOISE
NOISE
OFF : 0.1 V EMBI
EMBI
EXTREGC
EXTREGC
BTMICSW
BTMICSW
R803
MMUTE
MAIN UNIT MMUTE
VCC
DASTB
(1/3) DASTB
68k
2365_SCK
2365_SCK
2365_SDATA
2365_SDATA
2365_CSN
2365_CSN
2365_RST
2365_RST
ANLC
ANLC
FMON
FMON
ALCC
ALCC
FC
FC
PSTB
PSTB
PDATA
PDATA
PCK
PCK
UNLK
UNLK
BEEP
BEEP
DETO
DETO
AGCOFF
AGCOFF
WIDE
WIDE
NARROW
NARROW
PTT
PTT
VOX
VOX
JACKDET_G
JACKDET_G
CLONE
AFON
AFON
AFC
AFC
AGC
AGC
SCK
SCK
SDATA
SDATA
CLONE
MAIN UNIT
(1/3)
L8-1229TRW
+3.3V
DS505 DS504
R773
330
KA-2810ACGSK KA-2810ACGSK
LCD Backlight
Backlight
ON : 0 V
OFF : 2.3 V
+5V
BTAF
BTMIC
Explanatory notes
TX Line
RX Line
Voltage Line (HV)
Voltage Line (VCC)
Voltage Line (+5V)
Voltage Line (+3.3V)