akira CT-29FD9CPT, Руководство по обслуживанию

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Model No: CT-29FD9CP
T
Version 1.0
4
• SAFETY PRECAUTION
WARNING:
Service should not be attempted by anyone unfamiliar with the necessary
precaution on this receiver. The following are the necessary precaution to be
observed before servicing.
1. Always discharge the picture tube anode to the CRT conductive coating before
handing the picture tube. The picture tube is highly evacuated and if broken, glass
fragments will be violently expelled. Use shatterproof goggles and keep picture tube
away from the body while handing.
2. When replacing chassis in the cabinet, always be certain that all the protective
devices are put back in place, such as; nonmetallic control knobs, insulating covers,
shields, isolation resistor-capacitor network, etc.
3. Before returning the set to the customer, always perform an AC leakage current
check on the exposed metallic parts of the cabinet, such as antennas, terminals,
screw heads, metal overlays, control shafts etc. to be sure the set is safe to operate
without danger of electrical shock. Plug the AC line cord directly onto an 110/220V
AC outlet. Use an AC voltmeter having 500 ohms per volt or more sensitivity in the
following manner. Connect a 1500 ohm 10-watt resistor, paralleled by a 0.15 µF, AC
type capacitor, between a known good earth ground (water pipe, conduit etc.) and the
exposed metallic parts, one at a time. Measure the AC voltage across the
combination of 1500-ohm resistor and 0.15-µF capacitor. Reverse the AC plug at the
AC outlet and repeat AC voltage measurements for each exposed metallic part.
Voltage measured must not exceed 0.3 volts RMS. This corresponds to 0.2 milliamp.
AC Any value exceeding this limit constitutes a potential shock hazard and must be
corrected immediately.