TABLE OF CONTENTS

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 CIRCUITS

4-3

 

4-4

POWER SUPPLY CIRCUITS

4-3

 

4-5

PORT ALLOCATIONS

4-4

SECTION

5

ADJUSTMENT PROCEDURES

 

 

5-1

PREPARATION

5-1

 

5-2

PLL ADJUSTMENT

5-4

 

5-3

SOFTWARE ADJUSTMENT

5-5

SECTION

6

PARTS LIST

 

SECTION

7

MECHANICAL PARTS AND DISASSEMBLY

 

SECTION

8

SEMI-CONDUCTOR INFORMATION

 

SECTION

9

BOARD LAYOUTS

 

 

9-1

MAIN UNIT

9-1

 

9-2

SW-A AND SW-B UNITS

9-3

SECTION

10

BC-146 OPTIONAL DESKTOP CHARGER INFORMATION

 

10-1 PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1 10-2 DISASSEMBLY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-1 10-3 VOLTAGE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2 10-4 BOARD LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10-2

SECTION 11 BLOCK DIAGRAM

SECTION 12 VOLTAGE DIAGRAM

12-1

MAIN UNIT

.12-1

12-2

SW-A AND SW-B UNITS

.12-2

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Icom IC-F21S service manual Table of Contents