SYN-TECH III P25 PORTABLE RADIO
SERVICE MANUAL
7-1
7 DISASSEMBLY AND REASSEMBLY
WARNING
Electro Static Discharge (ESD)
* TO FEEL -3500V or higher
*TO HEAR -4500 V or higher,
*TO SEE SPARK -5000V or higher is necessary.
This equipment has ESD sensitive parts; hence the following precautions are necessary during
disassembly and assembly.
Some electronic parts may be damaged because of Electro Static Discharge (ESD).
Voltages, lower than the values given above, may cause damage on parts.
Disassembly and assembly should be done at tables that have ESD protective covering material and
proper grounding.
Personnel that perform disassembly and assembly procedure should wear an ESD protected smock.
A grounding strap should always be worn.
Grounding strap make connection to ground to prevent a static load.
Before starting any disassembly or assembly procedure, a grounding strap should be worn and
its connection should be verified. The grounding strap should be removed only when you have
left the protected area.
Assemblies and parts should be removed from their protection bags only at ESD protected areas.
Boards are protected from ESD in ESD protected bags. If the bag is open, the ESD protection is not
effective. Bags should be closed even if they contain a damaged board. This allows good components on
the damaged board to be protected.
Insulator materials should be far away from the ESD protected area. Electronic material can be damaged
because of the static load of some insulators. All plastic, nylon, foam and similar material should be kept
out of the ESD protected area.
Certain types of clothing can hold static load.
7.1 REQUIRED EQUIPMENT
Screwdriver
Tweezers
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