Service manual

1-2 Samsung Electronics
1-3 Static Electricity Precautions
Semi-conductors are easily damaged by static elec-
tricity. They are usually called electrostatically
sensitive devices (ESD). For example, there are IC,
FET, and semi-conductor chips.
1) Before you handle semi-conductor parts, be sure
to discharge electricity by touching earth connec-
tion or putting on a wristband. (Before you turn
on the product, put off the wristband to prevent
electric shock.)
2) Remove the static electricity protective device
and then place the assembly on the surface of
electric conductors such as aluminum foil to
prevent static electricity from accumulating.
3) Do not use chemicals like Freon. These chemicals
produce static electricity that may damage parts.
4) Solder ESD parts with a grounded soldering iron.
5) Use static electricity protective solder. Solder not
marked Ôstatic electricity protectiveÕ may accu-
mulate static electricity that damages ESD parts.
6) Do not get rid of the static electricity protective
cover of ESD parts until you are ready to replace
them. Most of ESD parts are packed, with elec-
tricity conducting materials in contact with ESD
parts leads.
7) Make static electricity protective materials con-
tact the chassis or the circuit where parts will be
mounted, before you remove the materials from
ESD parts to be replaced.
8) Minimize your motion when you handle the ESD
parts from which static electricity protective
materials have been removed. Static electricity is
generated when your clothes are frictionized or
you walk on the carpet.
9) Be careful not to bend pins when you handle IC.
10) Pay attention to directions when you mount
parts on PCB.
11) Overheat during soldering may damage the
parts completely. Heat affects all the parts.