Roadstar CTV-1015, Service Manual

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X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION. To avoid
such hazards, the high voltage must not be above the specified limit. The normal value of
the high voltage in this receiver is 18KV. The high voltage must not exceed 25KV. Each
time a receiver requires servicing, the high voltage should be checked according to the high
voltage check procedure on this manual. It is recommended that the reading of the high
voltage be recorded as a part of the service record. It is important to use an accurate and
reliable high voltage meter.
2. The only source of X-RAY RADIATION in this television is the picture tube. For continued
X-RAY RADIATION protection, the replacement of tube must be exactly the same type tube
as specified in the parts list.
3. Some parts in this television have special safety-related characteristics for X-RAY
RADIATION protection. For continued safety, parts replacement should be undertaken only
after referring to the PRODUCT SAFETY NOTICE below.
4. Serviceman - WARNING : To Reduce the Risk of Possible Exposure to X-Radiation, take
X-Radiation Protective Measures(See Service Manual) For Personnel During Servicing.
CAUTION : SHORT ANODE LEAD ONLY TO CHASSIS.
DO NOT PLACE THIS PRODUCT ON AN UNSTABLE CART, STAND, TRIPOD, BRACKET, OR
TABLE. THE PRODUCT MAY FALL, CAUSING SERIOUS PERSONAL INJURY AND
SERIOUS DAMAGE TO THE PRODUCT. USE ONLY WITH A CART, STAND, TRIPOD,
BRACKET, OR TABLE RECOMMENDED BY THE MANUFACTURER, OR SOLD WITH THE
PRODUCT. FOLLOW THE MANUFACTURER’S INSTRUCTIONS WHEN INSTALLING THE
PRODUCT AND USE MOUNTING ACCESSORIES RECOMMENDED BY THE NUFACTURER.
A PRODUCT AND CART COMBINATION SHOULD BE MOVED WITH CARE. QUICK
STOPS, EXCESSIVE FORCE, AND UNEVEN SURFACES MAY CAUSE THE PRODUCT
AND CART COMBINATION TO OVERTURN.
SAFETY PRECAUTION
WARNING : Service should not be attempted by anyone unfamiliar with the necessary
precautions on this television. The followings are the necessary precautions to be
observed before servicing.
1. Since the chassis of this television is directly connected to the AC power line (Hot chassis),an
isolation transformer should be used during any dynamic service to avoid possible shock hazard.
2. 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 beviolently
expelled. Use shatterproof goggles and keep picture tube away from the body while handing.
3. When replacing a chassis in the cabinet, always be certain that all the protective devices are
put back in place, such as non-metallic control knobs, insulating covers, shields isolation
resistor-capacitor network, etc.
4. Before returning the set to the customer, always perform an AC leakage current check on the
exposed metallic parts of the cabinet such as terminals, screwheads, metal overlays control
shafts, etc. to insure that the set is safe to operate without danger of electrical shock.
5. Plug the AC line cord directly into a AC 230V AC outlet. (do not use a line isolation
transformer during this check) Use an AC voltmeter having 5,000 ohm per volt or more sensitivity
in the following manner, Connect a 1,500 ohm 10 watts resistor, paralleled by a 0.15uF, AC type
capacitor, between a known good earth ground (water pipe, conduit, etc.) and the exposed
metallic parts, one at a time.
SAFETY PRECAUTION