Samsung BD-E8900, Service Manual, Page: 5 / 80

1. Precautions
d) Insulation Resistance Test Cold Check — (1) Unplug the power supply cord and connect a jumper wire between
the two prongs of the plug. (2) Turn on the power switch of the instrument. (3) Measure the resistance with
an ohmmeter between the jumpered AC plug and all exposed metallic cabinet parts on the instrument, such as
screwheads, antenna, control shafts, handle brackets, etc. When an exposed metallic part has a return path to the
chassis, the reading should be between 1 and 5.2 megohm. When there is no return path to the chassis, the reading
must be infinite. If the reading is not within the limits specified, there is the possibility of a shock hazard, and the
instrument must be repaired and rechecked before it is returned to the customer. See
2) Read and comply with all caution and safety related notes on or inside the cabinet, or on the chassis.
3) Design Alteration Warning — Do not alter or add to the mechanical or electrical design of this instrument.
Design alterations and additions, including but not limited to, circuit modifications and the addition of items such as
auxiliary audio output connections, might alter the safety characteristics of this instrument and create a hazard to the
user. Any design alterations or additions will make you, the servicer, responsible for personal injury or property
damage resulting therefrom.
4) Observe original lead dress. Take extra care to assure correct lead dress in the following areas:
(1) near sharp edges, (2) near thermally hot parts (be sure that leads and components do not touch thermally hot parts),
(3) the AC supply, (4) high voltage, and (5) antenna wiring. Always inspect in all areas for pinched, out-of-place, or
frayed wiring, Do not change spacing between a component and the printed-circuit board. Check the AC power cord
for damage.
5) Components, parts, and/or wiring that appear to have overheated or that are otherwise damaged should be replaced with
components, parts and/or wiring that meet original specifications.
Additionally, determine the cause of overheating and/or damage and, if necessary, take corrective action to remove
any potential safety hazard.
6) Product Safety Notice — Some electrical and mechanical parts have special safety-related characteristics which are
often not evident from visual inspection, nor can the protection they give necessarily be obtained by replacing them with
components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified by shading,
an (
) schematics and parts lists. Use of a substitute replacement that does not have the same safety characteristics
as the recommended replacement part might create shock, fire and/or other hazards. Product safety is under review
continuously and new instructions are issued whenever appropriate.
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