Схема домашнего кинотеатра Other SANSUNG MAX-445/455

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1. Precautions
Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazardssuch as electrical shock and X-rays.
Samsung Electronics
1-1 Safety Precautions
1. Be sure that all of the built-in protective
devices are replaced.
2. When reinstalling the chassis and its
assemblies, be sure to restore all protective
devices, including control knobs and
compartment covers.
3. Make sure that there are no cabinet
openings through which people--particularly children--might insert fingers
and contact dangerous voltages. Suchopenings include the spacing between thepicture tube and the cabinet mask,
excessively wide cabinet ventilation slots,
and improperly fitted back covers.
4. Design Alteration Warning:
Never alter or add to the mechanical orelectrical design of the unit. Example: Donot add auxiliary audio or video connec-tors. Such alterations might create a safetyhazard. Also, any design changes or addi-tions will void the manufacturer's warran-ty.
5. Leakage Current Hot Check (Figure 1-1):
Warning: Do not use an isolation transformer during this test. Use a leakage-
current tester or a metering system thatcomplies with American National StandardsInstitute (ANSI C101.1, Leakage Current forAppliances), and Underwriters Laboratories(UL Publication UL1410, 59.7).
With the unit completely reassembled, plug
the AC line cord directly into a 120V ACoutlet. With the unit's AC switch first inthe ON position and then OFF, measure thecurrent between a known earth ground(metal water pipe, etc.) and all exposedmetal parts. Examples: Handle brackets,metal cabinets, screwheads and controlshafts. The current measured should notexceed 0.5 milliamp. Reverse the power-plug prongs in the AC outlet and repeat.
6. Insulation Resistance Cold Check:
(1) With the unit's AC plug disconnectedfrom the AC source, connect an electricaljumper across the two AC prongs. (2) Setthe power switch to ON. (3) Measure theresistance between the shorted AC plug andany exposed metallic parts. Example:Screwheads, antenna, control shafts or handle brackets.
If any of the exposed metallic parts has areturn path to the chassis, the measuredresistance should be between 1 and 5.2megohms. If there is no return path, themeasured resistance should be "infinite." Ifthe resistance is outside these limits, a shockhazard might exist. See Figure 1-2
DeviceUnder
(Reading shouldnot be above0.5mA)
LeakageCurrantTester
EarthGround
exposed metal
Also test withplug reversed(using AC adapterplug as required)
2-Wire Cord
AntennaTerminal
ExposedMetal Part
Fig. 1-1 AC Leakage Test
Fig. 1-2 Insulation Resistance Test