Service Manual
5
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such
components commonly are called Electrostatically Sensitive (ES) Devices. Examples oftypical
ESdevices are integrated circuits and some field-effect transistors and semiconductor "chip"
components. The followingtechniques should be used to help reduce the ncidence ofcomponent
damage caused by static by static electricity.
1. Immediately before handling
any semiconductor component or semiconductor-equipped
assembly, drain off
any electrostatic charge on your body by touching
aknown earth ground.
Alternatively, obtain and wear acommercially available discharging
wrist strap device, which
should be removed to prevent potential shock reasons prior to applyingpower to the unit under
test.
2. After removing
an electrical assembly equipped with ESdevices, place the assembly on a
conductive surface such as aluminum
foil, to prevent electrostatic charge buildup or exposure of
the assembly.
1-2-4. About lead free solder (PbF)
This product is manufactured usinglead-free solder as apart of
a
movement within the
consumer products industry at large to be environmentally responsible. Lead-free solder must be
used in the servicing
and repairingofthis product.
1-2-5. Use the genewingparts (specified parts)
Special parts which have purposes offire retardant (resistors), high-quality sound (capacitors),
lownoise (resistors), etc. are used.
When replacing
any ofcomponents, be sure to use only manufacture's specified parts shown in
the parts list.
Safety Component
ƔComponents identified by mark have special characteristics important for safety.
1-2-6. Safety check after repairment
Confirmthat the screws, parts and wiring
which were removed in order to service are put in the
original positions, or whether there are the positions which are deteriorated around the serviced
places serviced or not. Check the insulation between the antennaterminal or external metal and
the AC cord plugblades. And be sure the safety ofthat.
HBTV-55D02FD
