Codan 2110 series, Руководство по ремонту

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Introduction
Manpack Transceiver 2110 series Repair Guide 3
Circuit board precautions
Connection/Disconnection
Ensure that any power supply or battery is switched off or disconnected before making
connections or disconnections between circuit boards.
Handling
Handle circuit boards by the edges only. Use antistatic bags or trays to store and transport
PCBs.
Grounding
Ground any items that may come into contact with the circuit board as follows:
• Discharge static charges, which may build up on a person, by touching a grounded
metal surface with both hands. This should be done before working on circuit
boards, and at frequent intervals while working on circuit boards.
• Wear a suitably grounded conductive wrist strap and use an anti-static mat. This
minimises the build up of static on you.
• Ensure that all test equipment is properly earthed through its power connection or by
earthing it to the workbench or anti-static mat.
Soldering
Excessive heat from soldering may lift tracks from the circuit boards and cause serious
damage. Avoid the use of high-powered soldering irons. A soldering iron rated at a
maximum of 60 W, preferably temperature-controlled at approximately 370°C, is
sufficient for most tasks. A soldering iron rated at a slightly higher temperature of 425°C
may be required for heavier components such as PA transistors. Only apply the soldering
iron long enough to de-solder an existing joint, or to solder a new one.
De-soldering
When de-soldering a component, use a solder sucker or solder wick to remove existing
solder.
A special de-soldering station is recommended for plated thru-holes.
CAUTION
Do not use lead-free solder for new soldering work.
CAUTION
Do not use sharp metal tools such as screwdrivers or twist drills to remove
components as these may damage the printed circuit track and plated thru-
holes.