How to Replace Surface
Mounted Devices
Most of the components in this instrument are mounted on the
surface of the board instead of through holes in the board.
These components are not hard to replace but they require an
-
other technique. If you do not have special SMD desoldering
equipment, follow the instructions below:
10-2 How to Replace Surface Mounted Devices
Figure 10-1 Heat the leads and push a thin aluminum
sheet between the leads and the pca.
Figure 10-2 When removed, clean the pads with
desoldering braid.
Figure 10-3 Place solder on the pad.
Figure 10-4 Solder all leads with plenty of solder, don’t
worry about short-circuits at this stage.
Figure 10-5 Remove excessive solder with desoldering
braid..
Figure 10-6 Use a strong magnifying glas to make sure
there are no short/circuits or unsoldered
leads.
Figure 10-7 Attach the IC to the pad with solder.
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