ICOM IC F121S manuals

Icom IC F121S User Manual (74 pages)

Brand: Icom | Category: Acoustics | Size: 4.78 MB |

English

Table of contents

VHF TRANSCEIVER

1

INTRODUCTION

2

ORDERING PARTS

2

REPAIR NOTES

2

TABLE OF CONTENTS

3

EXPLICIT DEFINITIONS

3

SECTION 1 SPECIFICATIONS

4

4-4 POWER SUPPLY CIRCUITS

10

4-5 PORT ALLOCATIONS

10

CPU-Continued

11

5-1 PREPARATION

12

• Connections

13

■ REQUIRED TEST EQUIPMENT

13

5-2 PLL ADJUSTMENT

15

5-3 SOFTWARE ADJUSTMENT

16

CONVENIENT:

17

5-4 TRIMMER ADJUSTMENT

18

SECTION 6 PARTS LIST

19

[MAIN UNIT][FRONT UNIT]

20

[MAIN UNIT]

20

[MAIN UNIT][MAIN UNIT]

21

SECTION 7 MECHANICAL PARTS

25

SECTION 9 BOARD LAYOUTS

28

• BOTTOM VIEW (FRONT UNIT)

29

9-2 MAIN UNIT

30

• BOTTOM VIEW (MAIN UNIT)

31

SECTION 10 BLOCK DIAGRAM

32

SECTION 11 VOLTAGE DIAGRAMS

33

11-2 MAIN UNIT

34

MAIN UNIT (2)

35

S-13906HZ-C1VS-e

37

© 2003 Icom Inc

37

UHF TRANSCEIVER

38

SECTION 2 INSIDE VIEW

42

SECTION 4 CIRCUIT DESCRIPTION

44

4-2 TRANSMITTER CIRCUITS

45

4-3 PLL CIRCUITS

46

S-13906HZ-C1US-w

74

C 2002, 2003 Icom Inc

74

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ICOM devices