Icom iV86 Service Manual Addendum page 73

SECTION 8 BLOCK DIAGRAM
J700
+5V Q703
[MIC]
PTT XPTT
DET
+5V MIC1,MIC2
IC701 Q721
MIC MIC GAIN
MC700
AMP CTRL
Q704
AUTO_TX ATX
CTRL
IC706,D708
AF
J701
AMP
[SP]
SP1 AF
MP4
AMP
4 3
2 1
3620
Explanatory notes
CONTROL Line
COMMON Line
DATA Line
TX Line
RX Line
Voltage Line (HV)
Voltage Line (VCC)
Voltage Line (+5V)
Voltage Line (+3.3V)
Q722,D700
HV POW
BAT +
SW
BAT -
Q712,Q723,
D711,D714,D717
S700
PWR
CTRL POSW VCC
POWER SW
PWON
+3.3V
+3.3V
X2
IC817,
D705,D706
TCXO
+5V VOX VOXV
AMP 13.00MHz
IC701
ALC MICIN
AMP
AFO
IC820
RMUT
MUTE
SW
S5V S5V +3.3V
AFON
IC819 IC817
IC702
AF AFVO AF
AMP AMP
D/A
Q705~Q707, BEEP
Q711
VCC
PWR
CTRL
S5V VCL,VDT
Q401,D413
CL MDET
CLONE
+3.3V BUFF CLO,CLI
IC403
+3.3V
NRST
RESET
X400
+3.3V CPUCLI
CPUCLO
Xtal
CSFT
12.288MHz
Q400,
DS401,DS402
VCC LCD LIGT
BACKLIGHT
BATV
+3.3V
IC707
+3.3V +3.3V
DC-DC
Q718,Q720
TXC
T5V
T5V
Q716,Q717
S5C
IC818 S5V
S5V
+5V
+5V
R4
T5V VCC Current
DET
Q6
PRE
DRIVE
Direct
IC1
Conversion
IC1,Q10
IC3
APC
AMP APC
AMP
RFPWR
ATSQ,
ATDTMF, ATSCK,
ATCTS ATSDA
DS400
SEG1~SEG25,
COM1~COM4
LCD
S400
DIUD,DICK
R.Enc
+3.3V
IC400
ESCL,ESDA
EEPROM
D408~D411,
S401~S413,
S415~S418
KR0~KR3,
KS0~KS3 KEY
MATRIX
CPU
D400~D407
IC402
KS0~KS3
ISO1~ISO2 INITIAL
MATRIX
[PTT]
S401
IPTT
VOXV
TEMP
XPTT,PWSW
TMUT,TXC,ATX
CSFT
PWON,S5C,RFPWR,
AFON,MIC1,MIC2
8-1
MAIN UNIT
D6~D9,
D13
Q7 Q9
DRIVE PWR ANT
LPF
AMP AMP SW
Q2,Q4,
D2
MUTE TMUT
SW
S5V
Q8 D4,D5
RF
BPF
AMP
RFPWR
136~174MHz
T5V
VHF
LPF