![background image](http://html.mh-extra.com/html/icom/ic-a23/ic-a23_service-manual_612408003.webp)
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