Changhong plasma burning Z plate, do not need to change the Z plate and Y plate, it is not difficult to repair, look at me. - appliance repair - Huaqiang Electronic Network

Probe current voltage pin 420*4450 head diameter 5.0 over current current and voltage pin

X3S026000B91H-Z

I have repaired two plasmas of Changhong 42638 burning Z plate in the past few days. One of them was repaired last year. I saw that the peers said that they would change the Z and Y boards at the same time. So I also bought three boards of Z board, Y board and buffer board. After repairing the whole set of replacement, I found that the newly bought Z board was broken after the boot. Finally, I returned the product and negotiated with the seller or lost 50 yuan. . Then I told the user that this plasma is basically a broken screen. This machine has not been repaired here. A few days ago, I received a plasma from Changhong 42638. The user said that the relay was ringing. I knew that it was a problem of burning the board. I pulled it back into the store and found that the Z board was broken.
This time I no longer buy the board online, I plan to repair the board to try, I know that the Z board is broken, generally two RJH30E2 breakdown damage, look at the Z board with a magnifying glass, there are several components around the feet seem to have cracks, I analyze because The plasma power is relatively large, the heat is high, and the situation of virtual soldering is definitely more than that of the CRT TV. On the TB, six RJH30E2s were purchased, and this machine was replaced by two. Later, the Y board was also removed, and the Y board heat sink and several power tubes and inductors and capacitors around the board were fully repaired. Then all the flexible cables connected to the logic board were sprayed with WD40. Then, the current meter is connected in series to each of the power board output to the Y board. Look at the current can be shut down in time to prevent the current from burning too much tube, a normal start, are between 0.4-0.6A. The screen is also normal, there is also boot music. Haha, I am very happy.
I quickly took out the plasma of Changhong 42738 last year and repaired it in the same way. That is to say, the two RJH30E2 of the Z plate are replaced, and some components of the Z plate and the Y plate are repaired by welding. I am repairing a large number of components in a large area.
I looked at the worried plasma burning board and I was repaired like this. You can also try my repairs like this.

The photo below is a screenshot of the video I took on my mobile phone, and the resolution is not high.