Icom iV86 Service Manual Addendum page 74

SECTION 9 VOLTAGE DIAGRAM
• MAIN UNIT (1/3)
VCC
T5V
S5V
+3.3V
R4
ATSDA VCC
ATSCK
0.15
ATCTS
MAIN UNIT
ATSQ
(2/3)
ATDTMF
TMUT
RFPWR
TEMP
R10
APCSW
150k
R12 R28
150k 18.0k
At TX output power:
Extra high: 2.3 V
High: 1.9 V
Middle: 1.3 V
Low: 0.7 V
RFPWR
T5V
TX : 0.2 V
TX MUTE
RX : 3.3 V
Q2
DTC014YEB
TMUT
ATSQ
ATDTMF
ATCTS
+3.3V
ATSCK
ATSDA
L19
10U
13 MHz TCXO
X2
R8
4 3
VCC OUT
1 2
0
GND GND
CR-1079
C20
10P
R21
At TX output power:
470k
Extra high: 0.7 V
High: 0.5 V
8
Middle: 0.3 V
R13
2 V+ IC1
Low: 0.1 V
1 GND NJM12904R
18.0k
3 4
IC1
NJM12904R
At TX output power:
C26 Extra high: 1.7 V
High: 1.5 V
0.1
Middle: 1.4 V
R26
Low: 1.2 V
150k
Q10
6 RUM002N02
R30
7 APCV
APC
5
1k
R16
IC1
NJM12904R
150k
R14
33k
Q4
DTA014EEB
2.9 V
D12
2.9 V
L1SS400
CP5 CP6
CP06S CP06S
1
AVDD
2
R24 SCLK
3
SDIO
4
R11 L22 C113 C114 47 AVDD
5
XTAL1
6
0 4.7U 0.001 33P
XTAL2
7
MODE
8
SENB
13 MHz
1.33 Vp-p
VCC
T5V
S5V
+3.3V
TX : 3.0 V
RX : 0 V
TX : 1.0 V
DRIVER
RX : 0 V
Pre
Q7
RD01MUS2B
DRIVER
R42
C46
100P 4.7
C38
150P
Q6
TX : 0.6 V 2SC5108
TX : 0.2 V
RX : 0 V
RX : 0 V
2.9 V
C124
2P
R33
47k
24
PDN
23
AVDD
22
CP4
PABIAS
21 CP06S
IC3
AVDD
20
AT1846S NC
19
NC
18 TX
RFOUT
17
NC
C52
RX Q8
2SC5108
47P
TX : 0.3 V
MP1
RX : 0.3 V
4066
9-1
TX : 7.1 V TX : 1.7 V
RX : 7.5 V RX : 0 V
TX : 7.1 V
RX : 7.5 V
L9 D6
C73
5.8N 0.001 RN142SM
PA D13
Q9
RN142SM
RD08MUS2
C59
82P
Explanatory notes
TX Line
RX Line
Voltage Line (VCC)
Voltage Line (+3.3V)
TX : 4.3 V
RX : 4.3 V
L13 C62 C75
27N 22P 5P
TX : 0.8 V
RX : 1.0 V
R55 R57
2.2k 2.2k
At RX frequency:
136.05 MHz: 0.8 V
146.05 MHz: 1.4 V
155.05 MHz: 1.9 V
173.95 MHz: 2.9 V
* Refer to the PARTS LIST for the value and name of component.
VCC
T5V
S5V
+3.3V
MAIN UNIT
(3/3)
MICIN
AFO
TEMPERATURE
TEMP
MP5
4066
TX : 0.8 V
RX : 0 V
C94
C88
12P
1P
C90
10P