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Icom IC-A23 - Supplied Accessories

Icom IC-A23
38 pages
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SECTION 1 SPECIFICATIONS
SECTION 2 INSIDE VIEWS
SECTION 3 DISASSEMBLY INSTRUCTIONS
SECTION 4 CIRCUIT DESCRIPTION
4 – 1 RECEIVER CIRCUITS ................................................................................................................... 4 – 1
4 – 2 TRANSMITTER CIRCUITS ............................................................................................................ 4 – 2
4 – 3 PLL CIRCUIT ................................................................................................................................. 4 – 3
4 – 4 POWER SUPPLY CIRCUITS ......................................................................................................... 4 – 4
4 – 5 CPU PORT ALLOCATIONS ........................................................................................................... 4 – 5
SECTION 5 ADJUSTMENT PROCEDURES
5 – 1 PREPARATION............................................................................................................................... 5 – 1
5 – 2 PLL ADJUSTMENT......................................................................................................................... 5 – 2
5 – 3 TRIMMER ADJUSTMENT .............................................................................................................. 5 – 3
5 – 4 RECEIVER ADJUSTMENT............................................................................................................. 5 – 7
SECTION 6 PARTS LIST
SECTION 7 MECHANICAL PARTS AND DISASSEMBLY
SECTION 8 SEMI-CONDUCTOR INFORMATION
SECTION 9 BOARD LAYOUTS
9 – 1 LOGIC UNIT ................................................................................................................................... 9 – 1
9 – 2 RF UNIT ......................................................................................................................................... 9 – 3
SECTION 10 BLOCK DIAGRAM
SECTION 11 VOLTAGE DIAGRAM
11 – 1 LOGIC UNIT ................................................................................................................................. 11 – 1
11 – 2 RF UNIT ....................................................................................................................................... 11 – 2
TABLE OF CONTENTS
*IC-A5/A23-chg 00.8.23 4:23 PM Page 1

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