CAUTION: Before servicing the chassis, read the “Safely Precaution”.
“X -Ray radiation Precaution” and “Product Safety Notice” in this manual.
X-RAY RADIATION PRECAUTION
1. Excessive high voltage can produce potentially hazardous X-RAY RADIATION.
To Avoid such hazards the high voltage must be specified limit. The normal value
of the high voltage of this receiver is 26.5KV +/-2KV under 230V AC power
source. The high voltage must not exceed 29KV.
2. Each time a receiver requires servicing the high voltage should be checked
following the HIGH VOLTAGE CHECK procedure in this manual. It is
recommended 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.
3. The primary source of X -RAY RADIATION in this TV receiver is the picture
tube. For continued X-RAY RADIATION protection, the replacement tube must
be exactly the same type tube as used in this TV receiver.
4. Some parts in this receiver have special safety-related characteristics for X-RAY
RADIATION protection. For continued safety, parts replacement should be
undertaken only after referring the PRODUCT SAFETY NOTICE below.
SAFETY PRECAUTION
WARNING: Service should not be attempted by anyone unfamiliar with the
necessary Precautions on this receiver.
The following are the necessary precautions to be observed before servicing this
chassis.
1. Since the power supply circuit of this receiver is directly connected to the AC
power line. 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
handling 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 unprotected body while handling.
3. When replacing a 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.
4. When replacing parts or circuit boards, disconnect the power cord.
5. When replacing a high voltage resistor (metal oxide resistor) on circuit hoard,
keep the resistor APP. 10mm(1/2 in.) away from circuit board.
6. Connection wires must be kept away from components with high voltage or
high temperature.
7. If any fuse in this TV receiver is blown, replace it with the FUSE specified in
Summary of Contents for TV4K-NICAM/A2/TXT
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