Revista Cambio
Cultura · Economía · Política · Periodismo inspirado en ti Miércoles 29 de Junio 2022

Trouble In just C5707 Transistor Inside of Benq T705 Liquid crystal display Keep track of

21 de Septiembre 2013

This BenQ T705 Liquid crystal display Check is made up of a well-known fault of clearly show shutdown the moment couple of your self “Upon” for number of seconds. The trigger of the scenario was always a shorted a single or 2 of the star stable hack ios C5707 thrust pull transistors. Apart from the shorted transistor, a person as well includes in the direction of keep an eye on the tuning capacitor for significant ESR price with the assist of ESR meter. If by yourself do not particular a person, oneself can hire the electronic capacitance meter in direction of verify the capacitance cost. Nonetheless, against my knowledge, examining basically the capacitance worthy of doesn’t be certain that the capacitor is positive until by yourself prove it with ESR meter. The cause why I concentrate upon monitoring this tuning capacitors was mainly because the capacitors include a superior failure price that may well induce the C5707 transistor in direction of shift shorted. By yourself in addition comprise in direction of monitor the substantial voltage transformer pins thoroughly. I experienced appear throughout pretty a amount of shorted C5707 transistors brought on by way of dry joints within just pins of the substantial voltage transformer.

Inside of this scenario, as standard the moment I include proven that merely 2 C5707 transistors shorted, I started off in the direction of check the tuning capacitors and check out the pins of the significant voltage transformer. Possibly the tuning capacitors uncovered in direction of be all right nonetheless there were being dry joints within just the transformer pins. Fresh new solder was made use of in the direction of the substantial voltage transformer pins and I’m organized in direction of “Upon” the Liquid crystal display Observe. Wager what? The Keep an eye on is made up of the very same symptom back again which is present shutdown once handful of seconds! I use’t believe that it as maximum of the season it will certainly exertion as this is a well-liked fault!

I begun in the direction of recheck the bordering variables that incorporate partnership in direction of the C5707 transistors still identified no blunders inside it. Identifying the board lots of moments didn’t explain any incorrect soldering task. There really should be some thing that includes absent completely wrong that experienced prompted the Liquid crystal display Check toward shutdown. Deep inside of my middle I dress in’t suspect backlights issue for the reason that the C5707 transistors shorted was prompted through dry joints inside of the superior voltage transformer. Beside, the backlights have been Incredibly dependable for this BenQ Liquid crystal Check our website display Check fashion.

Asking yourself back again, I ordered a refreshing badge of C5707 transistors in opposition to my digital producers not lengthy in the past. The heart pin (leg) is a little bit small than the other 2 as mentioned versus the photograph less than. I consideration in the direction of myself would it be this badge of transistors that comprise challenge leading to the exhibit shutdown right after pair seconds? Of system I can’t blindly suspect the transistors except I contain some evidence of it. The discovering starts off………………

Tests the C5707 transistor with an analogue meter preset in direction of X 1 and toward X 10 K Ohm doesn’t look which includes it consists of predicament. Evaluating the outcome with an primary C5707 transistor did consist of some big difference inside of the X 10 K Ohm variety however the looking at is affordable versus my several years of practical experience within just screening transistor. The just detail that I haven’t when compared is the Hfe reading through. I made use of the renowned Top Atlas factors analyzer towards look at either transistors and I may possibly certainly watch the huge big difference amongst the Hfe readings of the 2 transistors. The primary C5707 transistor consists of Hfe great importance of 379 though the fresh new badge of the C5707 transistor is made up of Hfe great importance of 161! At ultimate I found out the alternative!

I did experimented with switch the 4 C5707 transistors at a single shift with the refreshing badge of transistors yet the final result was the identical. Putting in the transistors that consist of the Hfe examining of 350 toward 400 resolved the demonstrate shutdown scenario. This circuit glance which include it can basically effort and hard work with the similar fashion of transistor that is made up of the rather very same Hfe cost! That’s why for this fashion of Watch circuit, several experts scarcely can identify a applicable substitute. Within just other words and phrases, even if by yourself might purchase the alternative transistor that comprise superior Volt, Amp and Watt nevertheless alternative Hfe worth, yourself nonetheless received’t be capable towards provide the Liquid crystal display Check again in direction of existence all over again. Towards the more than check, this Watch circuit incorporates voice out loud and apparent that it merely want the very same portion quantity with the similar Hfe truly worth except by yourself comprise some equivalent transistor substitute specification that is similar towards the primary a person.

For my visitors that are within just this digital correcting line, though some of yourself may well not be inside the Liquid crystal display Keep an eye on restore, I be expecting oneself will take up this material and implement it within your industry. Who is familiar with one particular working day on your own would incorporate experience the exact difficulty that I’m experiencing and this post may efficiently aid by yourself toward fix your issue mobile strike cheats hack prompt. Consist of a positive and a lucky working day!