Service Manual Part 1
8
8" &
8"8 ##
Surface mount devices require special storage, handling, removal and
replacement techniques. This equipment should be serviced only by an
approved Tait Dealer or Service Centre equipped with the necessary facil-
ities. Repairs attempted with incorrect equipment or by untrained person-
nel may result in permanent damage. If in doubt, contact Tait Electronics
Ltd or your nearest Tait Branch or Subsidiary.
8"88 ##>?#
The following points must be observed when servicing SMDs:
• Carry out all servicing in a static safe work area (refer to Figure 3.1).
• Always observe static precautions when handling or carrying SMDs. Carry in foil,
anti static bags or in trays and anti-static tubes for fine pitch ICs.
• Use appropriate tools when working with SMDs (refer to 3.4.1.2).
• Do not use soldering irons on surface mount capacitors, resistors, SOIC and SOT
components.
• Use new solder when replacing SMDs.
• Use the correct amount of solder (refer to Figure 3.9).
• Never reuse old SMDs.
• Do not use SMDs that have been dropped.
8"88 #'(&(
• Hot air tool or heat gun: adjustable temperature is required and a regulated hot air
blower. The nozzle is changed according to the size of the SMDs.
• Weller Pyropen®: this is a butane hot air tool, and is hotter than a heat gun. For use
only for resistors, capacitors and SOTs.
• Solder paste dispenser or syringe: for SMD placement.
• Tweezers: for use when handling SMDs.
• Solderwick: for removing solder on SMD pads or for removing excess solder or
bridging on multi-leg components.