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IC-F1721/D
Icom IC-F1721/D User Manual
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to MAIN UNIT
AFO
MIC
POSW
MFDA
GND
SLQ
GND
MICE
FMDA
8V
GND
VCC
J1
12
11
2
1
V5
V10
V15
V0
V25
V30
V35
V20
V40
H165
H160
H155
H150
H145
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9 - 4
FRONT
-B UNIT
• BO
TT
OM
VIEW (for IC-F1800 series)
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.
38
40
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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