What should I do if there is a problem with the TV set top box?

It is estimated that it is a software kernel failure of the set-top box; Here's why:

If the set-top box hardware is faulty, under normal circumstances, either there is no response when booted, or it is not displayed at all, and it is impossible to display a fault like C001**;

It should be a failure in the software kernel, and there are many reasons for this failure, such as when the set-top box is upgraded, the power supply is suddenly cut off, then the box must be hanging, just like the BIOS of the computer burns a truth; Another possibility is that the set-top box triggers special instructions or software failures when doing a certain operation.

Is there a signal that is green? Check the line, ask the neighbors about what is the situation of their home, and then report for repair.

The model set-top box card board is a circuit board equipped with a card reader, which should be called card PCB in English.

The channel part is responsible for the demodulation inside the chip-fiber date--this is incomprehensible in two words, and it takes a thick book to describe it clearly. The approximate meaning is: the signal received by the set-top box is the code stream modulated on the carrier, and the code stream must be demodulated from the carrier, and then restored into image and sound signals through decoding, D a conversion and other processing (or directly output digital signals, and the terminal equipment such as TVs will destroy and dismantle D A conversion processing), which is responsible for demodulation by the chip.

This is too complicated, and my translation from Chinese to English is not very accurate, so I will not translate it, the same below.

Wait a minute. The relationship between the motherboard and the PCB: The PCB is the printed circuit board, which is the component that carries the electronic components, and the circuit board that has been equipped with electronic components is called PCB.

A motherboard is a type of circuit board, which generally refers to a circuit board that contains a CPU and plays a dominant role.

General Maintenance Method:

1. Look. It is the easiest way to find faults directly. For the digital TV set-top box, such as the breakage of the audio lead and the power cord, the locking of the power button switch on the set-top box and the bounce of the sound channel and other buttons, the quality of the glass tube fuse on the power board, the explosion of the voltage control components and the leakage and bulging of the electrolytic capacitor, the overheating, discoloration and carbonization of the components on the circuit board, the conductor entry of liquid or small parts in the set-top box and the contact short circuit between the components on the circuit board, the open circuit caused by welding, etc., the power display on the digital TV set-top box, Signal display and channel display.

2. Measurement. Measurement is the primary method of finding set-top box faults with the help of instruments. In the absence of drawings and reference potentials, the measurement reflects the experience and theoretical level of an electrical maintenance personnel.

A fault has its corresponding measurement method, which parts to be measured, ** is the key point of measurement, what the correct working voltage should be, all have to know in mind. When it is found that the potential of a certain point is abnormal, it is necessary to determine which device is damaged, and it should also be checked in that direction, and it is necessary to make an accurate judgment when looking for maintenance personnel.

3. Touch. It is mainly the perception of the surface temperature of the component, so as to judge the quality of the component. We know that any electronic equipment that can operate normally, except for electronic components that are dedicated to special purposes such as heat generation, will not have a very high surface temperature during normal operation.

If a component heats up badly in a short period of time after the digital set-top box is turned on, hot and hotter, it is very likely that the component has been damaged and should be considered to be replaced. On the contrary, there is also a situation, that is, after the set-top box works normally for a certain period of time, some components will heat up to a certain temperature and remain stable, in contrast to the case of the TV stick, after the faulty set-top box is turned on for a certain period of time, a component has no temperature rise at all, like no power-on, it also means that the component is not working normally.

4. Change. Change, from a small aspect, is to replace the suspected damaged component with a good component, which is the replacement of the component, also called replacement. With the miniaturization and miniaturization of electronic products, the application of large-scale integrated circuits and the reduction of component costs, repair personnel sometimes do not take the trouble to replace a faulty component, such as the integrated circuit on the circuit board, but replace the entire circuit board with faulty components.

Generally** and the TV will not interfere.

Frequently Asked Questions:1The remote control battery is about to run out.

Replace the battery) 2The remote control battery is in loose contact.

Turn the battery a little, or see if the ends of the battery are oxidized or even yellowed, if so, sharpen it with a sand skin or cutter head).

3.The infrared receiver of the set-top box is blocked, and the infrared rays emitted by the remote control cannot be fully received.

Do not cover the window with a cloth head such as a towel).

4.The infrared receiving window of the set-top box is not (completely) aimed at the viewer, resulting in the infrared of the remote control not being aligned with the receiving window.

Adjust the orientation of the set-top box to align it with the recipient).

Does it have anything to do with the battery of the remote control?,Why don't you check the connection cable between the set-top box and the TV.。

There is very little interference. You restore the set-top box to its factory design and try it in the re-program. There should be no interference. The room is so big, you can't stand 10m away to operate the TV.

Take the set-top box and remote control to someone else's house and try it out!