I'm working on a Hisense LCD TV model TLM40V68PK, with motherboard number RSAG7.820.4154-ROH VER B. While inspecting the board, I noticed that the N17 small patch three-terminal regulator, SE8117TA (940-LF), was not functioning properly. The input voltage is stable at 5V, but the output fluctuates between 1.01V and 1.13V. When the voltage stabilizes to 1.23V, the TV works normally again. I’m trying to find an alternative for the SE8117TA (940-LF). After checking online, I found that APL1117 can be used as a replacement for 1.8V, 2.5V, 2.85V, and 3.3V outputs. If it’s marked as ADJ, you can adjust the output voltage accordingly. I tried using an APL1117 with ADJ, replacing the original regulator. The output stabilized at 1.2V, and the TV now works perfectly. This solved the issue!
Dropout Fuse Cutout and load drop fuse cutout are outdoor used high-voltage protective devices. They are connected with the main lines of the distribution transformer or the distribution wires to protect the transformer or wires from short circuit and overload, and on/off loading current. Dropout fuse cutout consists of insulating bracket and fuse tube. The static contacts are fixed on the two ends of bracket, while the moving contacts are fixed on the two ends of fuse tube. Fuse tube is composed of inner extinction tube and the outer epoxy glass tube. The load drop fuse cutout is added with elastic supporting contacts and arcing shield for switching on-off loading current. In normal operation, the fuse tube will form an enclosure via its tightened fuse link. The fuse will be melt off quickly and form an arc if there is any fault, the extinction tube is heated by the arc, exploding much gas to give high pressure into the tube and blow along with the tube, so the arc is quickly elongated and extinguished. When the fuse is cut off, moving contacts at the bottom turn down without tension; the locking frame will release the fuse, so the fuse drops to form obvious break. When it needs to put load on, start the contact with insulating cod, then the static and moving contacts are still keeping in touch, keep pulling the contacts till the supporting contacts apart. Then there is the arc among the supporting contacts, which is prolonged in the narrow space of arcing shield.At the same time, the arc extinguishing cover generates gas, and the arc is extinguished when the current exceeds zero.
Porcelain Fuse Cutout,Drop Fuse Cutout,Fuse Link Cut Out,Cutout Fuse Holder
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