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IC-F1721/D
Icom IC-F1721/D User Manual
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9 - 2
The combination of this page and the pre
vious page
shows the unit la
yout in the same configuration as the
actual P
.C.
Board.
to MAIN UNIT
AFO
MIC
POSW
MFD
A
GND
SLQ
GND
MICE
FMD
A
8V
GND
VCC
J1
12
11
2
1
H0
V5
V10
V15
V0
V25
V30
V35
V20
V40
H115
H110
H105
H100
H95
H90
H85
H80
H75
H70
H65
H60
H55
H50
H45
H40
H35
H30
H25
H20
H15
H10
H5
FRONT
-A UNIT
• BO
TT
OM
VIEW (for IC-F1700 series)
36
38
Table of Contents
Table of Contents
3
Specifications
4
Inside Views
5
Section 3 Disassembly Instructions
7
Section 4 Circuit Description
8
Receiver Circuits
8
Transmitter Circuits
10
Pll Circuits
11
Power Supply Circuits
11
Other Circuits
12
Port Allocations
13
Section 5 Adjustment Procedures
15
Preparation
15
Lcd Contrast Adjustment
18
Soft Ware Adjustment
18
Section 6 Parts List
23
Section 7 Mechanical Parts and Disassembly
33
Section 8 Semi-Conductor Information
35
Section 9 Board Layouts
36
FRONT-A UNIT (for IC-F1700 Series)
36
FRONT-B UNIT (for IC-F1800 Series)
38
Main Unit
41
Block Diagram
42
Voltage Diagram
43
FRONT-A UNIT (for IC-F1700 Series)
43
FRONT-B UNIT (for IC-F1800 Series)
44
Main Unit
45
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Icom IC-F1721/D Specifications
General
Brand
Icom
Model
IC-F1721/D
Category
Transceiver
Language
English
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