Troubleshooting LCD monitor energy supply pack is simpler compared to crt monitor energy supply. It's small , compact in most cases only has one output that is twelve volt and vary from 2 ampere to in excess of 4 ampere. Some designed have 18 and 24 volts also. Nowadays most LCD energy supplies are build in to the primary board like the Dell E151FP LCD Monitor as the older type were separated as energy pack module.
The energy pack module type is simple to identify since you can replace another working unit simply to make certain may be the energy pack that giving problem. You may even make use of an exterior electricity energy supply to energy in the LCD to verify when the energy pack is faulty. If you don't possess the exterior electricity energy supply, you could make use of this approach to isolate the issue particularly the signs and symptoms aren't any energy, low energy and energy blink. While using rear lamp (twelve volt) from the vehicle and fasten it towards the energy pack output jack. Whether it light vibrantly then your energy pack is ok. Whether it blink or dim the energy pack have problem. Why need to use this process to check it? Because, if you will find components shorted or leaking in the LCD primary board, it'll modify the energy supply performance.
From experienced, the majority of the LCD energy supply problems whether within the energy pack or included in primary board were because of the failure of electrolytic capacitors (most most likely because of warmth) however and secondary section. The majority of the capacitors have a superior ESR which in turn causes the energy supply to create low output, blink or no energy whatsoever. Typical value electrolytic capacitors however side are 47 and 100 micro farad 50 Volt and also the secondary sides are 1000 to 2200 micro farad 25 volt. Sometimes you can observe the capacitor top casing grew to become bulge and also the sleeve that covered the capacitor casing converted into more dark color like brown.
The energy section in a few of the LCD screen continue to be while using UC3842 pulse width modulation (pwm) ic. This kind of ic isn't very difficult to locate on the market rival some energy ic that is tough to get. Samsung 153V LCD monitor is applying the TOP247F energy ic quite simple to trobleshoot and fix if energy fail within this model. Some energy pack that arrived have only minor burnt after cleaning it and changed the fuse, it will act as good because the brand new one.
Troubleshooting LCD energy supply isn't so complicated provided knowing the way a energy supply work. If you're unclear about how you can trobleshoot and fix energy supply, I urge you to definitely read my energy supply articles in the energy supply page. I'll still publish more energy supplies articles at this page and we do hope you could visit more frequently to look at this site.
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