Схема видеокамеры Other SAMSUNG SV-613X/611X/610X/510X, SV-613F/610F, SV-613B, SV-B150B/B150X/B130G

Формат файла: PDF

Samsung Electronics
1. Precautions
1. Be sure that all of the built-in protective devices are
replaced. Restore any missing protective shields.
2. When reinstalling the chassis and its assemblies, be
sure to restore all pretective 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 dangerousvoltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet ventilation slots, and improperly fitted back covers.
If the measured resistance is less than 1.0 megohmor greater than 5.2 megohms, an abnormality existsthat must be corrected before the unit is returned to the customer.
4. Leakage Current Hot Check (See Fig. 1) :
Warning : Do not use an isolation transformer during this test. Use a leakage current tester or a metering system that complies with American National Standards Institute (ANSI C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).
5. With the unit completely reassembled, plug the AC
line cord directly the power outlet. With the unit?s
AC switch first in the ON position and then OFF,
measure the current between a known erath ground (metal water pipe, conduit, etc.) and all exposed metal parts, including : antennas, handlebrackets, metal cabinets, screwheads and controlshafts. The current measured should not exceed0.5 milliamp. Reverse the power-plug prongs in the
AC outlet and repeat the test.
6. X-ray Limits :
The picture tube is designed to prohibit X-ray emissions. To ensure continued X-ray protection,replace the picture tube only with one that is the same type as the original.
Fig. 1-1 AC Leakage Test
7. Antenna Cold Check :
With the unit?s AC plug disconnected from the
AC source, connect an electrical jumper across the
two AC prongs. Connect one lead of the ohmmeterto an AC prong.Connect the other lead to the coaxial connector.
8. High Voltage Limit :
High voltage must be measured each time servicing is done on the B+, horizontal deflectionor high voltage circuits.
Heed the high voltage limits. These include theX-ray protection Specifications Label, and theProduct Safety and X-ray Warning Note on theservice data schematic.
9. Some semiconductor (?solid state?) devices are
easily damaged by static electricity.Such components are called ElectrostaticallySensitive Devices (ESDs); examples includeintegrated circuits and some field-effect transistors.The following techniques will reduce the occurrence of component damage caused by staticelectricity.
10. Immediately before handling sny semiconductor
components or assemblies, drain the electrostaticcharge from your body by touching a known earth ground. Alternatively, wear a dischargingWrist-strap device. (Be sure to remove it prior to applying power--this is an electric shock precaution.)
DeviceUnder
(Reading shouldnot be above0.5mA)
LeakageCurrantTester
EarthGround
exposed metal
Also test withplug reversed(using AC adapterplug as required)
2-Wire Cord