Panasonic plasma TH-42PV600C screen bad fault repair case! - appliance repair - Huaqiang Electronic Network

MOS power IC full range

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

Electronic scale crystal oscillator 3.2*2.5mm 3225 16M (16.000MHZ) 12PF 10PPM 20PPM 30PPM

Panasonic TH-42PV600C plasma TV, this machine information is really pitiful, I am also the first time this whole thing, the screen is even more rare! I will do a little bit of power to upload a little bit, I hope the brothers support the younger brother!


This power cord is really thick TN, power on, the image on the left side of the screen is normal, the desk is small, can not turn, can only shoot obliquely! There is no image on the right side of the screen, it becomes black and white. Look carefully at the right side of the screen. There are obviously several three-color vertical lines. Remember, whether it is liquid crystal or plasma, this is the key to the screen!

The 75V and 5V power supply of the measurement selection board are normal. In order to confirm the fault range, further verification is required! Under normal circumstances, unplug the selection board and the screen connected to the corresponding line of control will appear a straight leucorrhea or black belt, first pull out the most doubtful rightmost, the unexpected thing, the picture becomes like this Now! Misjudgment is absolutely taboo for a maintenance person. It is simply a waste of money for the workers, so it is necessary to avoid it as much as possible. Therefore, we must continue to explore...

Remove the motherboard, this is the next thing! Measure the solder joint resistance (signal input pin) next to the plug. Under normal circumstances, all the plugs should be close to balance! First measure the rightmost




Then measure other

Obviously, the resistance side of the faulty side is too small. In order to be more certain, the cable is removed and the measurement is close to infinity. The microchip is attached to the cable. The aluminum plate on the back is the heat sink. Look at the calf. The chip has broken and bubbling, and the screen is really broken. Don't be suspicious! Of course, if you can find such a cable and a screen press, it should be repairable, but I can't do it!

In addition, the red light flashes 11 times for the cooling fan failure. This type of fan is very special. The two fans are independent. The general 12V three-line fan can't be used. It has been tested for N, although some can be used at that time. However, occasionally it will be difficult to start, irregular protection and shutdown. The most common computer fan has been tested and can not be replaced, wind speed detection is definitely different! Although it can not be replaced, but the method is always more difficult! After actual combat, the S yellow signal line is grounded, the wind speed detection protection can be removed, so that a 12V two-wire fan can be used anyway. It is best to find a good quality to prevent poor heat dissipation!
This speaker is really good to say

Although the machine was not repaired, the silver two did not receive the master is also very unhappy, but at least let me understand == "Unplug a certain group of screen line faults also change, this is the phenomenon of bad screen!" A lot of things, if you don't even have the guts to try, how can you get the mystery?

Summary: The depth of water determines how far you can swim, and the daring is the light of success. A little bit of subtle change may be the key to solving the case!