- When switched on, the STANDBY LED601 LED first goes out and then the
- lights up. The device turns on, but after a while the image becomes distorted.
- The TV receiver does not turn on while on standby
- The appearance of a narrow horizontal strip on the
- screen Compressed image -vertical linear violation at the top of the screen
- No green in the image
- TV not functioning
- Can not adjust the sound volume
- Image dimensions increasedvertical scrolling
- Spontaneous shutdown of the TV receiver
- No color image
- White raster on the screen shifted to the right, and on the left side - a black band
- No image, there is a raster
- No switching of the TV to the operating mode from the attendant
- Color rendition in variouscolor systems
- Reception and memorization of programs only on the first channel
This article is an overview of typical faults for a foreign-produced TVof a kinescope type. Most breakages can be eliminated by the service center master. LG TV repair requires special equipment and certain skills. However, the owner of the TV-device does not interfere with knowing at least the main faults and their causes.
There are a lot of reasons why LTJI TVs may need repair. At the same time, you can identify those that users often have to face. We will discuss them below.
to the contents ↑When switched on, the STANDBY LED601 LED first goes out, and then the
lights up again. The TV receiver does not exit the standby mode. Causes of damage can be:
- short-circuit on a zener diode;
- burnout of a rupture resistor.
You can eliminate the breakdown by replacing these items.
to content ↑The device turns on, but after a while the picture becomes distorted.
In this case, the TV does not respond to commands from the remote control and the front panel. There is also a spontaneous transfer of the television receiver to the standby mode.
The cause of the fault is the malfunction of the controller chip. In its replacement and is the repair of the TV LJI.
to the contents ↑The TV receiver does not turn on while on standby mode.
In this case, the output voltages of the +115 and 18 V channels are reduced by about half. The problem is the failure of the filter capacitor.
LG TV repair is to replace the failed part.
to content ↑The appearance of a narrow horizontal strip on the
screen The cause of this failure is the failure of the capacitor in the power supply.
It's easy to eliminate the problem - replace the capacitor, and the repair of the LJI TV will be completed.
to the contents ↑Compressed image-vertical linear violation at the top of the screen
If this is the situation you are observing with your technique, the C406 capacitor has failed. It remains to replace the part with the workpiece.
to the contents ↑No green color on the image
To find out the cause of this phenomenon, check the device with an oscilloscope. Most likely, the chip failed.
to the contents ↑The TV does not function
The IP passes to the overcurrent protection mode - the breakdown of the transistor of the output stage CP Q702.
The problem can be solved by replacing the transistor.
to the contents ↑It is not possible to adjust the volume of the sound
If you can not change the sound settings in any way, or if the device gives incorrect values after the response, the I121 chip that needs to be replaced is faulty.
to the contents ↑Image dimensions increased vertically
In this case, you may notice too much brightness of the image. All this signals a malfunction of the capacitor C419.
to content ↑Switching the TV receiver off
Normally this is indicated by turning off the device after 5-10 minutes of operation, switching to standby mode
In this case, problems with the Zener diode D651.
to content ↑No color image
Spontaneous increase in brightness can also be observed with the same spontaneous switching to standby mode. Malfunction of the power supply stabilizer on the IC982 chip. The problem is solved by a local repair of the LG TV by replacing the microcircuit.
to content ↑White raster on the screen, shifted to the right, and on the left side - black strip
This phenomenon on your home appliance indicates a breakdown of the IC702 memory chip.
to content ↑No image, there is raster
As a rule, on the right side of the screen is a 100 mm vertical black strip. There is no OSD image. All this is a malfunction of the IC701 IC.And the repair of TV LJI will consist in replacing such a detail.
to the contents ↑There is no switching of the TV to the operating mode from the attendant
If you observe exactly such a picture, a short circuit occurred on transistor Q981 of the protection circuit.
to content ↑Color rendition in various color systems
The reason for the strong magnetization of the aperture array of the kinescope. LG TV repair is as follows: eliminate the problem by applying an external demagnetizing loop.
to the contents ↑Receiving and storing programs only on the first channel
If there is a delay in selecting any other channel, the memory chip that needs to be replaced by a working one is malfunctioning.
Trying to repair a TV without any idea of its device, you can not. Do not risk, call the master. The information given in the article will allow you to explain to the expert what exactly happened to your television device, and he will intelligently understand the reasons and restore the efficiency of your equipment.
