40-inch DYNEX LCD TV DX-L40-I0A irregular timing failure maintenance example sharing - appliance repair - Huaqiang electronic network

MOS power IC full range

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

inductance

Brand AVX TPSE226M035R0125 Low impedance tantalum capacitor AVX 22

SMD aluminum electrolytic capacitor

This morning, the guest sent a 40-inch LCD "DYNEX" LCD TV, model: Dx-L40-I0A. The fault is "off the machine" from time to time. According to my general subjective disconnection, the fault location is: First, the power board and the high voltage board, and the main board and each related connection position are possible. However, I removed the back cover of the machine for further investigation. When the machine was inadvertently moved, the backlight was suddenly turned on. I saw the back of the machine and the screen returned to the original state. At this moment, the person is out. The instinct of psychological reaction: I understand! (Of course you also know) --- See "Lobster" jumped ashore today! As the electric batch was removed and the parts of the machine were removed, the line of sight quickly caught the signs that the power strip and the motherboard were disconnected (the power board end). Then, check the power board off-hook. Sure enough, it is a hell! After careful repair, the machine was running for 3 hours and 0K! No abnormalities. Guests pay USD 208. Summary: Because the repairs were found to have been repaired and replaced by the board, this may be slightly modified by the original plug-in line and the plug-in, and the bad effects of today's machine due to the poor modification process. Here, the staff who wish to perform maintenance should remember that some poor contact of the various parts of the machine may lead to the recurrence of this fault. See the picture, thank you! !