CSA-32e.pdf 1289KB May 02 2006 12:07:50 PM - DCC Supplies

2.2 General Assembly HintsBefore beginning with the assembly of this module, it is recommended tohave the following tools ready:• A heat resistant work base• A small side cutter• A small wire stripper• Tweezers to handle small parts• A soldering iron with a small tip• A soldering iron holder and a sponge• Solder, 0.5mm diameter• Wire with a minimum of 0.25mm diameterThe following are a few tips for the proper use of a soldering iron. Feel freeto skip this section if your soldering skills are sufficient:• Use a small soldering iron, maximum 30Watt. To ensure a speedy heattransfer to components, the soldering tip should be kept clean. Wipe thetip on a moist sponge every time before starting to solder.• Use exclusively solder designed for electronic work, such as: SN60PB(60% tin, 40% lead) containing flux.• Don’t use any other solder paste or liquid to solder electroniccomponents. They may contain acid, which will destroy components andcopper traces on circuit board.• Components can also be destroyed if the solder process takes too long.Other components may be de-soldered and copper traces lifted off thecircuit board if excess heat is applied.The solder time should be limited to 5 seconds especially when dealingwith semi conductors, LED’s, electrolytic condensers and IC’s, toprevent above problems.• Hold the solder tip to the work so that both parts to be joined aretouched. Add a little solder. Remove the solder wire as soon as it starts toflow. Hold the soldering iron for a few more seconds to allow the solderto flow evenly around the components legs and then remove the iron.• Don’t move the soldered components for about 5 seconds. A clean, shinysolder joint should be the result.• Cut the components legs just above the solder joint using a small sidecutter. Excess solder can be liquefied again, by applying heat with aclean solder tip. The solder will flow back to the tip of the soldering iron.7