Icom IC-821H - Table of Contents

TABLE OF CONTENTS
SECTION 1 SPECIFICATIONS
SECTION
2 DISASSEMBLY INSTRUCTIONS
SECTION
3 INSIDE VIEWS
SECTION
4 CIRCUIT DESCRIPTION
4 - 1 RECEIVER CIRCUITS ................................................................................................................................... 4 - 1
4 - 2
TRANSMITTER CIRCUITS ............................................................................................................................ 4 - 4
4-3 PLLCIRCUITS ............................................................................................................................................... 4-6
4 - 4 POWER SUPPLY CIRCUITS ......................................................................................................................... 4 - 7
4 - 5
PORT ALLOCATIONS .................................................................................................................................... 4 - 7
SECTION 5 ADJUSTMENT PROCEDURES
5 -1 PREPARATION BEFORE SERVICING ......................................................................................................... 5-1
5 - 2 PLL ADJUSTMENT ........................................................................................................................................ 5 - 2
5 - 3 FREQUENCY ADJUSTMENT ........................................................................................................................ 5 - 2
5 - 4
RECEIVER ADJUSTMENT ............................................................................................................................ 5 - 4
5 - 5
TRANSMITTER ADJUSTMENT ..................................................................................................................... 5 - 8
5 - 6 METER AND
SQUELCH ADJUSTMENT ..................................................................................................... 5 -12
5 - 7 RF METER ADJUSTMENT .......................................................................................................................... 5 - 13
5 - 8 METER REFERENCE ADJUSTMENT ......................................................................................................... 5 - 13
SECTION 6 PARTS LIST
SECTION 7 MECHANICAL PARTS
SECTION 8 SEMI-CONDUCTOR INFORMATION
SECTION
9 BOARD LAYOUTS
9 - 1 FRONT ........................................................................................................................................................... 9 - 1
9 - 2
MAIN UNIT ..................................................................................................................................................... 9 - 4
9 - 3 PLL
UNIT ........................................................................................................................................................ 9 - 6
9 - 4 PA-A AND PA-B
UNITS ................................................................................................................................. 9 - 7
9 - 5 RF-A AND RF-B
UNITS .................................................................................................................................. 9 - 8
SECTION 10 BLOCK DIAGRAM
SECTION 11 VOLTAGE DIAGRAM