Voltage Diagram - Icom IC-A16 Service Manual

SECTION 9

VOLTAGE DIAGRAM

• FRONT UNIT
BTAF
BTMIC
BT_CLK
CP504
CP06S
BT_MOSI
CP505
CP06S
BT_MISO
CP506
CP06S
BT_CSB
CP507
CP06S
EP500
R648
BLM15GA750SN1D
0
EP501
BLM15GA750SN1D
R644
BTRXD
47k
BTTXD R645
47k
BT_DEMP R646
47k
CPU_DEMP R647
47k
CP511
CP06S
CP512
CP06S
Q508
BTTEST
LDTC144EE
R656
R652
100k 100k
C537
0.1
5
1 IC507
4
R650
C536 R653
3
NJU7056F3
0.1 27k
1k 2
R657
27k
C544
100P
C557
1
R654
R660
100
33k
C538
1
C556
1
C539
1
C558
1
Bluetooth setting :
ON : 3.1 V
OFF : 0 V
IC508
NC
C541 4
BT3V
VOUT
5
S-1200B33
NFM15PC104R1A3
D510
L1SS400
Q509
LDTC144EE
Bluetooth headset
TX : 0 V
RX : 3.3 V
C551
1
C560
1
Q510
HOPC
LDTC144EE
Explanatory notes
IC509
Bluetooth setting :
VOUT MR
4 3
VSS ON : 3.3 V
2
VDD CD
OFF : 2.8 V
5 1
NJU7704F3
C550
0.001 Bluetooth setting :
ON : 3.3 V
OFF : 0 V
ON/OFF
3
VSS
2
VIN
1
9-1
TX Line
RX Line
Voltage Line (HV)
Voltage Line (+5V)
MAIN UNIT (3/3)
HV
KR0
KR1
KR2
KR3
KS0
KS1
KS2
KS3
+5V
10KEY_LED
Backlight
ON : 0 V
OFF : 2.3 V
* Refer to the PARTS LIST for the value and name of component.
[1] [2] [3] [▼]
S1 S2 S3 S13
SKRBAAE010 SKRBAAE010 SKRBAAE010 SKRBAAE010
[4] [5] [6] [▲]
S4 S5 S6 S14
SKRBAAE010 SKRBAAE010 SKRBAAE010 SKRBAAE010
[7] [8] [9] [MR]
S7 S8 S9 S15
SKRBAAE010 SKRBAAE010 SKRBAAE010 SKRBAAE010
[ENT] [0] [FUNC] [CLR]
S10 S11 S12 S16
SKRBAAE010 SKRBAAE010 SKRBAAE010 SKRBAAE010
Backlight
ON : 2.9 V
OFF : 3.6 V
10-key Backlight