Precautions - Samsung SCX-5312F Service Manual

1. Precautions

Follow these safety, ESD, and servicing precautions to prevent personal injury and equipment damage.
1-1 Safety Precautions
1. Be sure that all built-in protective devices are in
place. Restore any missing protective shields.
2. Make sure there are no cabinet openings
through which people-particularly children- might
insert fingers or objects and contact dangerous
voltages.
3. When re-installing chassis and assemblies, be
sure to restore all protective devices, including
control knobs and compartment covers.
4. Design Alteration Warning:Never alter or add to
the mechanical or electrical design of this equip-
ment, such as auxiliary connectors, etc. Such
alterations and modifications will void the manu-
facturer's warranty.
5. Components, parts, and wiring that appear to
have overheated or are otherwise damaged
should be replaced with parts which meet the
original specifications. Always determine the
cause of damage or overheating, and correct any
potential hazards.
1-2 Precautions on Disassembly and Reassembly
Very careful precautions should be taken when
replacing parts. Before replacing, please check
cables because you cannot put the cables that you
removed for replacing parts into the proper place if
you would not make sure of where they were con-
nected and in which condition.
Please do the following before disassembling for a
repair or replacement of parts.
1. Pull out paper cassette, printer cartridge
installed. Especially careful not to be scratched
by the surface of developer or not to expose
them to light.
2. Turn the power switch off.
3. Take out the power plug, printer cable from the
printer.
4. Use only the same type of part as original when
replacing parts.
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6. Observe the original lead dress, especially near
sharp edges, AC, and high voltage power sup-
plies. Always inspect for pinched, out-of-place,
or frayed wiring. Do not change the spacing
between components and the printed circuit
board.
7. Product Safety Notice:Some electrical and
mechanical parts have special safety-related
characteristics which might not be obvious from
visual inspection. These safety features and the
protection they provide could be lost if a replace-
ment component differs from the original. This
holds true, even though the replacement may be
rated for higher voltage, wattage, etc.
8. Components critical for safety are indicated in
the parts list with symbols .
Use only replacement components that have the
same ratings, especially for flame resistance and
dielectric specifications. A replacement part that
does not have the same safety characteristics as
the original may create shock, fire, or other
safety hazards.
5. Do not force to open or fasten plastic material
components.
6. Be careful that small parts such as screws
should not get in the printer.
7. When disassembling, assembling, also observe
small components are located in place.
8. If you uncover and turn the machine over to
replace some parts, toner or paper particles may
contaminate the LSU window. Protect the LSU
window with clean paper.
Releasing Plastic Latches
Many of parts are held in
place with plastic latches.
The latches break easily :
release them carefully.
To remove such parts,
press the hook end of the
latch away from the part to
which it is latched.
Precautions
1-1