Clear-com HB-704 Manuel d'utilisateur télécharger pdf (Page 15)

HB-702/HB-704 TWO- AND FOUR-CHANNEL HEAD-

3-1

MAINTENANCE

INTRODUCTION

This chapter provides maintenance information including troubleshooting tips and block diagrams.

Caution: These servicing instructions are for use by qualified personnel only. To reduce the risk of electrical

shock, do not perform any servicing other than that contained in the operating instructions unless you

are qualified to do so.

BLOCK DIAGRAM OF HB-702 TWO-CHANNEL HEADSET STA-

TION

Figure 3-4 HB-702 Block Diagram

EQ/

LIM

Headset

Mic

Sidetone

Null

Call

Light

Intercom

Volume

TW Option

Channel

Switch

Ch. A

Power

Ch. B

Call Send &

Receive

Headset

Output

Mic

Mute

Common

+30 VDC

Ground

Long Line

4-Wire

Input

4-Wire

Output

2-Wire / 4-Wire

Select

Rectifier

16 VAC

Power

Ch. B

Ch. A

4-Wire

Option

Talk

RMK

Microprocessor

Talk

Latch

Disable

Call

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 ... 23 24

CLEAR-COM ENCORE 1
CONTENTS 3
IMPORTANT SAFETY 5
INSTRUCTIONS 5
Figure 1: Safety Symbols 6
OPERATION 7
INSTALLATION 13
MAINTENANCE 15
TROUBLESHOOTING TIPS 16
SYMPTOM CAUSE SOLUTION 17
TECHNICAL 19
SPECIFICATIONS 19
LIMITED 21
WARRANTY 21
WARRANTY REPAIRS AND RETURNS 22
EXTENDED WARRANTY 23
SERVICE CONTRACT 23
LIABILITY 23

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