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TABLE OF CONTENTS

SECTION 1 SPECIFICATIONS

SECTION 2 INSIDE VIEWS

SECTION 3 CIRCUIT DESCRIPTION

3 - 1 RECEIVER CIRCUITS ................................................................................................... 3 - 1

3 - 2 TRANSMITTER CIRCUITS ............................................................................................ 3 - 3

3 - 3 PLL CIRCUITS ................................................................................................................ 3 - 4

3 - 4 OTHER CIRCUITS .......................................................................................................... 3 - 5

3 - 5 POWER SUPPLY CIRCUITS ......................................................................................... 3 - 5

3 - 6 PORT ALLOCATIONS .................................................................................................... 3 - 6

SECTION 4 ADJUSTMENT PROCEDURES

4 - 1 PREPARATION................................................................................................................ 4 - 1

4 - 2 PLL ADJUSTMENST ...................................................................................................... 4 - 4

4 - 3 RECEIVER ADJUSTMENT ............................................................................................ 4 - 6

4 - 4 SOFTWARE ADJUSTMENT ........................................................................................... 4 - 7

SECTION 5 PARTS LIST

SECTION 6 OPTIONAL UNIT INSTALLATION

SECTION 7 MECHANICAL PARTS AND DISASSEMBLY

SECTION 8 SEMI-CONDUCTOR INFORMATION

SECTION 9 BOARD LAYOUTS

9 - 1 FRONT UNIT ............................................................................................................ 9 - 1

9 - 2 VR UNIT ............................................................................................................ 9 - 1

9 - 3 TVCO UNIT ............................................................................................................ 9 - 1

9 - 4 RVCO UNIT ............................................................................................................ 9 - 1

9 - 5 LOGIC UNIT ............................................................................................................ 9 - 3

9 - 6 RX UNIT ............................................................................................................ 9 - 5

9 - 7 TX UNIT ............................................................................................................ 9 - 7

9 - 8 50PA UNIT [FR4000]............................................................................................. 9 - 9

9 - 9 VARISTER UNIT [FR4000]............................................................................................. 9 - 9

9 - 10 25PA UNIT [FR4100]............................................................................................. 9 - 11

9 - 11 REG UNIT [FR4000]............................................................................................. 9 - 13

9 - 12 JACK1 UNIT [FR4000]............................................................................................. 9 - 13

9 - 13 JACK2 UNIT [FR4000]............................................................................................. 9 - 13

9 - 14 JACK1 UNIT [FR4100]............................................................................................. 9 - 15

9 - 15 JACK2 UNIT [FR4100]............................................................................................. 9 - 15

SECTION 10 BLOCK DIAGRAM

SECTION 11 WIRING DIAGRAM

SECTION 12 VOLTAGE DIAGRAM

Icom IC-FR4100 Service Manual

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