![background image](http://html2.mh-extra.com/html/icom/ic-f8101/ic-f8101_service-manual_4291828019.webp)
4-6
Pin
No.
Line
Name
Description
I/O
93
REF
Refl ected wave sensing voltage.
I
95
FOR
Foward wave sensing voltage.
I
98
STBSEL_D
Binar y to decimal conver ter control.
H=Enabled.
O
99
STBSEL_C
Binar y to decimal conver ter control.
H=Enabled.
O
100
STBSEL_B
Binar y to decimal conver ter control.
H=Enabled.
O
R8
CTRL
T8
CTRL
+8
REG
+5
REG
+8
REG
+5
REG
+5
REG
MAIN-A UNIT
R8V
Q1803
H5V
IC1801
+8V
IC1806
CPU
MAIN
TXS
RXS
13.8V
COMMON
FILTER
FUSE
(5A)
RELAY
CTRL
HV
14V
HV
14V
PA8V
IC4001
Q4004
T8V
(TX circuits)
(RX circuits)
HV
SRAM
IC1812
Q1804
IC6009
SW
IC6006
RESET
IC1808
Q6002,Q6003
IC6008
+5V
+3V
REG
IC6007
+3.3V
REG
+10V
IC6011
HVLED
DISPLAY-A UNIT
IC1002
REG
+3.3V
IC1001
M8V
3.3V
5V
8V
HV
HV
PA-A UNIT
D4002
D4001
Q1806,Q1807
D1810
BU CNTL
14V
+1.2V
IC8201
IC8203
+1.2
REG
DSP
3.3V/-8V
REG
IC8001
Q8001,Q8002
3.3V
M8V
14V
3.3V
DSP2-A UNIT
DSP1-A UNIT
4-4 PORT ALLOCATIONS (Continued)
• MAIN CPU (MAIN-A UNIT: IC1806)
4-5 VOLTAGE CIRCUITS
Voltage from the power supply is routed throughout the transceiver, through regulators and switches.