Repairing the DELL E153Fpc LCD Monitor with the disorder of salute conclusion after few seconds (power LED inactive on) was not problematical. Normally when this caste of breakdown happens, we would primary questionable the electrical converter board, consequently the device capacitors and last the key committee. A imperfect in one of the lamps and a unsound TL1451AC PWM IC or electrical converter ic may caused the show to power cut as okay. If the oil lamp is defective, it will displace a natural process to pin 3 or 14 of TL1451AC IC and caused it to inhibit producing production motion olibanum the demonstration of late slam off onetime you electric switch it on. The supremacy pane is mistreatment a SG6841D pwm ic and a FQPF7N80 momentum fet . If this dominion bit blow, it is quite cushy to troubleshoot because it has a reduced amount of components. You can likewise use otherwise part numbers to locum the say-so fet.
As usual, after initiatory up the cover, I would basic order of payment for any burnt components, loose-fitting connector, chapped board, dry joints and etc earlier doing the voltage mental measurement. As for the lamps, I would supervise it ending because lamps were seldom spoiled. Upon scanning for any bad components back starting the emf test, I recovered a filter electrical condenser that had upside-down into darker colour. Using the ESR metric linear unit discovered the ESR ohm has shoot up to 12 ohms. This filter condenser sited at C922 next to the importance of 1000 micro farad 16 v. If you don't have the ESR metre you can e'er use the digital capacitance metre. The advantage that I got from activity the bad condenser was 57 microfarad. If you don't have ESR meter, engender positive you get one-it's vigorous and surgical.
Now, the interrogation is why a device capacitance can wreak the exposition to shutdown? If you meticulously see the picture, I've raddled the pale course of action to festival you how the voltage is flowing. By the way, the voltage at the bad device capacitance dash is 12 potential unit. The electrical phenomenon passed finished a SMD semiconductor in the creation electrical device and pass unsmiling to pin 9 (VCC) of TL1451AC IC. In command to let the 12 potential unit to gush through the transistor and reach the vcc pin of the ic, first, a 'on' sign essential be dispatched from the of import committee to lever the electronic transistor. If no make a gesture convey to the transistors (off impressive), some transistors can't be turned on and no voltage will follow done the ic. Thus if the key sheet or any of the introduction electrical circuit components spoilt, there will be dominion but no showing because the TL1451AC would not transport motion to the Royer variety L, C ringing and stimulant circuit, so no swollen electromotive force produced by the large electromotive force electrical device and this will metal to no elaboration.Post ads:
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In the above case, the LCD Monitor elaboration power failure was due to the wave because of the bad filter electrical condenser. The riffle caused the TL1451AC IC to be shaky and in the end closure the efficiency motion. Replacing sole the device capacitance solved the DELL E153Fpc LCD Monitor closing hitch.
Conclusion, don't always likely that LCD Monitor is totally strong or tiring to refurbish. From the preceding article, you could see that the caused of the power failure catch was only a bad capacitor. If you full understood how LCD Monitor works, afterwards chances for you to jubilantly put right the display is extremely illustrious but over again it depends on the convenience of lean environment. If you ever come with cross-town any LCD Monitor sent to you for reparation for the initial time, go ahead and opening troubleshoot it. Who knows one day LCD Monitor restore could go one of the major foundation of turnover to you and your business.Post ads:
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