Abell A720T, Руководство по обслуживанию

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A720T (VHF) Service Manual V1.0
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Chapter 1 Introduction
1.1 Scope of application
This manual is written for technicians who well know communication profession and have maintenance experience. It
includes all information and existing published data required by the equipment maintenance. The change may happen
after its publication, if required, you can use repair bulletin and manual revised edition as supplement.
Before repair the equipment, please read this manual first.
1.2 Security Issues
Safe power radiation of two way radio
Two way radios can produce and emit electromagnetic energy to outside, and electromagnetic transmission safety
design of ABELL two way radio completely conforms with national and international standard. In order to ensure the
best communication effect of two way radio and the electromagnetic transmission safety for human, when you use
two way radios for communication, please keep the two way radio perpendicular to the ground, and your month away
from microphone 2.5-5 cm.
Electromagnetic interference
In order to avoid electromagnetic interference, please turn off two way radio when you are in the places where there is
clear indication to turn off the two way radio (such as hospital, airport)
Explosive environment
You'd better turn off two way radio when in explosive environment.
Please turn off two way radio when in gas station or parking there.
Please turn it off when near electric fuse.
It is strictly prohibited to replace or recharge battery in the place where there is potentially explosive air.
Damaged antenna
When antenna is damaged, you better not to use two way radios. When the damaged antenna touches human skin, it
may cause mild burn.
Parts replacement
When start to replace any parts, please note the type, don't randomly use the components which differ from the
information provided by the company.
Maintenance service
In order to repair the equipment, we set up a completed service system, and provide the material including schematic
diagram, printed substrate as your reference.