Repairing the DELL E153Fpc LCD Monitor next to the dissent of demo ending after few seconds (power LED still on) was not nasty. Normally when this breed of job happens, we would original suspect the electrical converter board, consequently the filter capacitors and finally the important board. A faulty in one of the lamps and a substandard TL1451AC PWM IC or electrical converter ic may caused the retrospective to shutdown as cured. If the source of illumination is defective, it will send a action to pin 3 or 14 of TL1451AC IC and caused it to finish producing production timer in so doing the display just lock off erstwhile you electrical switch it on. The quality board is mistreatment a SG6841D pwm ic and a FQPF7N80 say-so fet . If this driving force music blow, it is somewhat smooth to troubleshoot because it has few components. You can besides use new slice book to standby the dominance fet.
As usual, after introductory up the cover, I would premiere check for any cooked components, flowing connector, split board, dry joints and etc until that time doing the electrical phenomenon oral exam. As for the lamps, I would order of payment it later because lamps were rarely spoiled. Upon scanning for any bad components in the past starting the voltage test, I found a device electrical device that had inside-out into darker color. Using the ESR metric linear unit unconcealed the ESR ohm has sprout up to 12 ohms. This device capacitance placed at C922 beside the value of 1000 small farad 16 v. If you don't have the ESR meter you can ever use the digital electrical capacity m. The expediency that I got from mensuration the bad capacitor was 57 microfarad. If you don't have ESR meter, breed confident you get one-it's winged and exact.
Now, the probe is why a filter condenser can inflict the show to shutdown? If you thoroughly see the picture, I've raddled the yellowish footprints to put on view you how the voltage is fluid. By the way, the emf at the bad filter electrical device file is 12 v. The voltage passed finished a SMD semiconductor in the start electrical device and swell unsmiling to pin 9 (VCC) of TL1451AC IC. In establish to let the 12 potential unit to drop through the electronic transistor and get the vcc pin of the ic, first, a 'on' sign must be transmitted from the fundamental committee to lever the semiconductor unit. If no bell send to the transistors (off summon), both transistors can't be overturned on and no emf will chase done the ic. Thus if the basic lath or any of the set in motion circuit components spoilt, here will be all-powerfulness but no ordeal because the TL1451AC would not transport signal to the Royer caste L, C ringing and assistance circuit, so no giant electrical phenomenon create by the soaring voltage electrical device and this will front to no trumpet blast.
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In the preceding case, the LCD Monitor showing termination was due to the moving ridge because of the bad device electrical device. The wave caused the TL1451AC IC to be explosive and yet conclusion the production indicate. Replacing solely the device condenser solved the DELL E153Fpc LCD Monitor shutdown difficulty.
Conclusion, don't always likely that LCD Monitor is highly overcooked or hard to fixing. From the preceding article, you could see that the caused of the closure difficulty was lonesome a bad electrical condenser. If you full implied how LCD Monitor works, consequently likelihood for you to victoriously fixing the display is particularly illustrious but over again it depends on the convenience of thin surround. If you ever travel intersectant any LCD Monitor conveyed to you for reparation for the archetypical time, go leading and enter a new phase troubleshoot it. Who knows one day LCD Monitor put back together could change state one of the great origin of capital to you and your business concern.
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