EFJohnson 764X manuals

Efjohnson 764X User Manual (99 pages)

Brand: Efjohnson | Category: Microphones | Size: 3.88 MB |

English

Table of contents

Service Manual

1

761x (VHF)

2

764x (UHF)

2

CONVENTIONAL

2

FM TWO-WAY RADIO

2

TABLE OF CONTENTS

3

TABLE OF CONTENTS (CONT’D)

4

242 - 7 6

6

GENERAL INFORMATION

10

November 1998

10

Part No. 001-7600-001

10

INSTALLATION AND DISASSEMBLY

12

OPERATION

21

SECTION 4 PROGRAMMING

26

PROGRAMMING

27

LMR (U.S.) Format

28

Parameter Description

30

Parameter

32

Description

32

Frequency

56

4.0 Ohm Speaker Load

56

VHF ADJUSTMENTS

59

UHF ADJUSTMENTS

63

ADJUSTMENT PROCEDURE

65

SECTION 7 PARTS LIST

66

7610 (VHF) Main Unit

68

7640 (UHF) Main Unit

74

)5217ý81,7

83

Front Unit (All Models)

84

VHF (7610) EXPLODED VIEW

86

FOLDOUT

87

VHF (7610) BLOCK DIAGRAM

88

VHF MAIN UNIT

92

UHF (7640) BLOCK DIAGRAM

93

MEASUREMENT CONDITIONS

98

DIGITAL MULTIMETER:50kΩ/VDC

98

OSCILLOSCOPE :20MHz

98

FRONT UNIT

98

• DIODES

99

EFJohnson devices