common problems of cable digital tv set -尊龙棋牌

with the overall transformation of digital tv continues to increase, the number of digital tv users do not continue to increase, the user reflects the failure of more and more, but most problems are caused by operational errors, the user is now frequently encountered problems and their the solution is described below.

(1) can not normally receive a frequency point on the digital tv programs

there is no "program flow" prompt, the lack of channel programs cause this phenomenon may be the user line and user box is not standardized, there may be branch distributor input and output port is reversed, there may be cable indicators failed ( the attenuation of the cable at a certain frequency is too large), or set-top box itself.

first check the user line at both ends of the connector is standardized, if the connection meets the requirements, and then check whether the user box cable tv. in the digital signal output, the use of devices must be standardized, can not use some of the appearance of non-formal production of beautiful enterprises, but in fact does not meet the transmission requirements of the user box and user line, the user box for receiving analog tv no other impact, but for the digital signal, such a user box or the user line will appear a notch point causes a frequency point on the digital tv program receiving incomplete, inspection found that there is such a non-standard user box must be replaced.

in the case that the subscriber line and the subscriber box and the distribution network are detected to be satisfactory, there is a case where the position of the input / output port of the splitter or splitter in the transmission network is installed or the connection head in the network is not standardized, resulting in poor grounding. if it is because a certain section of the cable is not standardized, with the consent of the user, replace the cable. if replaced by another set-top box can receive the same signal, you can determine the set-top box itself is caused by the problem. there are individual differences in the tuner, and some high-frequency head just at a particular frequency to receive the performance of the poor to eat, it can not receive the frequency of the program.

(2) received the program appears mosaic phenomenon

first of all, check the signal input port set-top box and the user box output signal connection is tight, the user is connected to the specification of the thread, grounding is good, in some cases need to replace the user line, and check the stb signal input is correct.
the level of the user's home is too low or too high, the decoding capability of the tuner also has an impact, it requires a level range, such as the need for maintenance personnel on the user's home signal level test, if not meet the machine the same box to receive the request, the network must be adjusted accordingly. now the home signal is generally sufficient, if the user home amplifier installed, but poor reception, should be removed amplifier.

if you use the same signal, for another set-top box will be able to receive, it is likely that the tuner itself is a problem, you need to replace the tuner.

if a channel in a different region at the same time such problems, and other programs are normal, it is likely to be caused by the source of the problem, such a situation is generally caused by interference from other external factors, relatively rare, if there is also short , and will soon be able to recover.

(3) turn on the tv and set-top box only show snowflakes and no image

this situation is mainly caused by no signal or operation, mainly due to audio and video damage or no conversion of the tv, check the set-top box audio and video cable is connected with the tv's audio and video input interface, if the connection meets the requirements, set-top box of the power lights and work lights are brightened, it may be the tv does not switch to the video input mode, which is the whole turn in the most encountered phenomenon, and some manufacturers of tv can not automatically save the video, when the boot need to switch once.

(4) the display does not recognize the smart card

set-top box and the card is not the correct contact, may be inserted in the card, or set-top box is broken, or the card is broken.

(5) the tv has no sound or no sound

this situation is generally no audio input tv, audio line or bad video cable is not connected, misuse. re-connected or there is a problem, replace a group of audio and video connections and input port, for audio, but also pay attention to whether the set mute.

(6) the image has no color

this situation may be the tv's color signal is not input, the tv's video input and set-top box does not correspond to the video output, or the tv system is wrong, or tv bad set-top box bad, which television system does not account for the majority.

if the wiring is correct, the county tv to switch to the corresponding video, first consider the tv's standard settings, the tv system settings or set-top box menu (see figure 1), set the tv set-top box, set the tv signal input interface, set the tv system will be adjusted to automatic or pal standard. second, consider replacing the tv's video input interface, the tv set-top box video input interface, with sandpaper or other tools into the tv video port to clean up, because the contact will cause bad image bad phenomenon. again is the set-top boxes and tv problems.

(7) "no signal" prompt or "unauthorized" prompt

for the "no signal" prompt, check the signal input cable set-top box is correct, some users will still signal the other end into the tv rather than the user box.

for the "unauthorized" prompt, the user may have purchased the program has expired or did not purchase the program, and check whether the card with the set-top box to do machine card binding, the results are correct, re-operation machine card pairing and authorization.

(8) the remote controller can not be operated

this situation is the remote control battery is out of date, or the distance is wrong, or set-top box panel is blocked or the remote control is broken.

the remote control should be aligned with the front panel of the set-top box or check the remote control battery is reversed, the battery power is sufficient.

(9) the front panel power indicator does not light, the work indicator does not shine

check the set-top box power cord is connected, set-top box power switch is turned on, otherwise it is set-top box failure, the need for maintenance.

finally, in the day-to-day use of set-top boxes, in order to ensure the life of the set-top box, turn off the tv at the same time turn off the set-top box power, re-open the set-top box to watch again. if you do not use for a long time, it is best to unplug the set-top box power cord, video and audio input line, encountered the thunderstorm weather is best to pull the above cable to avoid lightning; smart card is a precision device, not frequent plug to avoid damage.