Changhong color TV automatically turns off for no reason,Changhong TV turns on the automatic switch

Poor contact of the cracks of the heating welding feet of the components is not good, this is a common fault of color TV, power failure, disassemble the chassis, if it is not convenient to view, unplug the cable socket, turn it over to view, especially the components that are heated and yellowed, it is best to repair the welding again, after finishing, you must remember to reconnect the socket, especially the main power supply, otherwise the power supply will be burned when the power is turned on.

This kind of fault is the easiest to repair, with a repair rate of 90 100

Be sure to reinsert all the sockets).

Supplement: The thermal performance of the component is poor, and the most common problem of this kind is the regulator diode. When it is cold, it will break down when it is normally hot, which is also called soft breakdown, and it is difficult to detect. The maintenance man's words are perfunctory, and there is no need to doubt unless the voltage in your home fluctuates.

This fault obviously appears in the source part, and it is mostly due to the heat expansion problem, that is, the virtual soldering. You can repair the soldering in the power supply part first, and then check whether each voltage is normal. There is also a component that looks for overheating anomalies.

If so, it should be considered whether it is overcurrent or filter leakage, etc.

In my experience, check the power supply: first, repair welding; Second, check whether 300V is normal, and third, check whether the +b voltage and attached voltage are normal. Fourth, check whether the output of the high package has any output defects (including virtual welding) Fifth, check the downward excitation transformer. Good luck.

Actually, I want to say that as a salesperson, I don't really know anything about power supply, and the two above are very clear.

But here's what I'm going to say.

Maybe this thing can be dealt with, but please call the after-sales home repair within the warranty period, because according to the analysis of the above few people, the problem is TV, so you don't have to spend anything more.

Even outside the warranty period, it is relatively easy to solve, so it may be a start-up fee.

But if you deal with it yourself, no matter what problems there are in the future, it's hard to say, after the do-it-yourself repair, any problem in the future is considered man-made damage, and it is not warranted.

Well, my opinion is this, and I wish you a pleasant use.

LZ, I don't think you'll be able to fix it. This fault may be caused by loose soldering or aging of the component, and only inspection can determine the specific fault location. It is recommended not to look for after-sales service, they are very dark and will kill people.

Summary. The functions of different models of Changhong TVs are different,Some can be set,Some can't; Users can refer to the product instruction manual of the TV for confirmation, or consult the after-sales service of the TV for confirmation. If the TV supports setting automatic power on/off, the setting method is as follows:

1. Turn on the TV and press the menu button of the remote control to bring up the menu options of the TV.

2. Find the system settings and press the confirm button to enter.

3. After entering, find the setting option of timing power on/off, and press the confirm button to enter.

4. After entering, you can set the time of turning on and off separately.

Changhong TV turns on the automatic switch function.

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The functions of different models of Changhong TVs are different,Some can be set,Some can't; Users can refer to the product instruction manual of the TV for confirmation, or consult the after-sales service of the TV for confirmation. If the TV supports setting automatic power on/off, the setting method is as follows: 1. Turn on the TV, press the menu key of the remote control, and bring up the menu options of the TV.

2. Find the system settings and press the confirm button to enter the Zhengmao Liang. 3. After entering, find the setting option of timing power on/off, and press the confirmation button to enter. 4. After entering, you can set the time of turning on and off separately.

1. Check whether it is the automatic shutdown caused by the virtual soldering of the TV, in this case, you need to disassemble the TV shell, carefully check the solder joints at the switching power supply of the TV and the line scan output circuit, and re-weld the virtual solder joints after finding them. 2. If the TV is automatically shut down due to the X-ray protection circuit of the TV, it means that the TV is connected to a large external resistance, and the resistance value deteriorates, and the foot in this place can be directly short-circuited to the ground during maintenance. 3. If it is caused by overvoltage protection, you need to pay attention to the voltage problem, and the TV must choose the right voltage.

The reason for this situation:It may be that the TV is turned off caused by the virtual welding of the TV,The phenomenon of the virtual welding of the TV is that the TV is turned off irregularly,At the same time, it will automatically turn on after shutting down。 The X-ray protection circuit of the TV will also cause the TV to turn off automatically, and the TV will soon turn off again after turning it on, and it is also prone to turn off from time to time.

In addition, too high a voltage can also cause the TV to turn off automatically. When the current load circuit of the TV is too high for some reason,The overcurrent protection of the TV will work to make the power supply circuit of the TV stop working,So if the current is too large,Then Changhong TV will also automatically shut down。

If Changyin Chunhong TV always shuts down automatically,It may be due to the following reasons:

1.Power supply issues: Check that the TV's power cord is plugged in tightly and that the power outlet is working properly.

2.Remote control problem: Check whether the remote control is misoperated, such as pressing and holding the power button for a long time, etc.

3.TV settings issues: Check whether the TV's settings are correct, such as whether the auto-shutdown time is set too short.

4.Fault problem:If the above problems are eliminated,It may be that the TV is faulty,Need to contact after-sales service for maintenance。