Icom IC-A25N Service Manual page 78

• LOGIC UNIT (2/2)
VCC
5.0 V
VCC
D34
L1SS400
0
R937
5VL
HV
POWER ON: 3.3 V
POWER OFF: 0 V
CP06S
CP16
5VL
+3V
*R857
*R858
6.7 V VCC
CP06S
CP15
R595
0
J1
PSTB PCON
1 2
PDATA INTPTT
3 4
PCK PWRBTN
5 6
UNLK PWSW
7 8
VOLDATA RFDETV
9 10
VOLCLK RSSI
11 12
RFSTB SBATT2
13 14
SCK TXC
15 16
SDATA VIN
17 18
OE VORDET
19 20
DA1STB VORON
21 22
DA2STB BATDATA
23 24
+3V BEEP
25 26
AFC CLONE
27 28
VCC DCIN
29 30
PTT
31 32
EMBI
33 34
DETO
35 36
AGCOFF JACKDET
37 38
BTMIC LVIN
39 40
BTMICSW PATMP
41 42
VOX NOISE
43 44
SPMUTE CHGC
45 46
BTAF CHGIH
47 48
49 50
J3
*C631
*EP9
*R856
*IC17
A1 D1
RF_IN VSS
A2 D2
VSS VSS
A3 D3
VSS VSS
A4 D4
VSS NC
A5 D5
VDD_BKUP_IN VDD_BKUP_BAT_IN
A6 D6
VSS I2C_SCL
A7 D7
GPIO0 I2C_SDA
B1 E1
VSS VSS
B2 E2
VSS VSS
B3 E3
VSS VSS
B4 E4
UART0_RX VSS
B5 E5
UART0_CTS VDD_PRPH_OUT
B6 E6
VSS VSS
B7 E7
UART0_T X VSS
C1
VSS
C2
VSS
C3
VSS
*R859
C4
NRST
C5 *MP1
BOOT_MODE0
C6
VDD_IO_HOST
C7
GPIO1
*R862
*R861
NC ON/OFF
4 3
*C632
VSS
GPS Set (in the Menu)
2
VOUT VIN
5 1 ON: 3.3 V
*IC31
OFF: 0 V
GPS Set (in the Menu)
*IC-A25N only
ON: 3.3 V
OFF: 0 V 5.0 V
*IC-A25N only
*R1092
BTAF
CP06S BT_CLK
CP4
CP06S BT_MOSI
CP1
CP06S BT_MISO
CP6
BT_CSB
CP06S
*EP3 CP5
*R1077
*EP4
*R864
BTRXD
*R865
BTTXD
BT_DEMP
*R868
CPU_DEMP
*R869
BT3V
*Q17
BTTEST
9-2
*R962
*R879
5
*C650
1 *IC32
*C709
4
*C653 *R875
3
2
*R874
*C652
*R3 *C7
*C645 *R871
*C5
*C6
*IC39
VOUT MR
4 3
VSS
2
VDD CD
5 1
*C704
NC ON/OFF
*C643 4 3
VSS
2
VOUT VIN
5 1
*IC30
*D46
5.0 V
*Q5
Explanatory notes
*Refer to the PARTS LIST for the value and name of component.
*Q16
HOPC
BT_SW
TX Line
RX Line
Voltage Line