Also check transistor pulse generator “power on reset”, and resistor kapasisitor also present in the transistor base circuit. If the transistor circuit is working properly, then the entire output DC voltage regulation will be reset by the PWM generator and consequently the power supply is not completely out DC. Replace new transistor if the transistor POR testing proved defective.
Similarly, if the capacitor in the test will be dry, its value changes, so must the new change with the exact same value as before. Because Power Supply general computer work with a higher temperature than room temperature, then there is the possibility that excessive heat causes legs solderan or component cables there is unimpeded.
Inspect all solderan the Power Supply PCB, even better make sure that the correct relationship with the road re-tin solder is more soft (diluted, Flux 60/40). So the cable connection or leg components may be on the loose knit and guaranteed power supply will generally be able to work normally again.
active components can not be done with a multimeter is serving as ICTL494 PWM generator to control the power switching transistors work. IC is only in the test by comparing the IC of normal power supply to other similar. Use the IC socket with a suspected broken IC is still a good comparison.
If the process of checking and replacement of damaged components as a whole has done, then try the power supply is turned on by placing the burden of drine disk only. Check whether the fan spinning, measuring voltage yellow wire (+12), red (+5), blue (-5), blue (-12), orange (POR) to black wire (ground). When the voltage parameters of the cables are correct, turn off the power supply and replace the motherboard or the load with a full load as before, please try again.
Tags: active components, ictl494, kapasisitor, multimeter, parkzone red hulu, Power Supply, resistor, switching transistors, transistor
#1 written by Haywood Vinzant December 29th, 2009 at 15:23
This was my fist low end cpu product i bought. The keyboard, screen size, battery life, cpu power are appropriate to browse and do regular work. I removed the virus software and the hulu and youtube hd seem to work ok but not perfect. The processor is definitely slower than the standard laptop. So expect a slowness in the response.
The product is very good and I think installing windows 7 will help improve the performance on the video delivery. Further I tried with multi monitors (24″ and 17″) together and it works great.
I would recommend this laptop for anyone who wants a laptop in addition to their desktop and would like to showoff at work. The full size keyboard is just perfect for fast typing and taking notes.
Six hour battery life is very good. I charge it every night and it just comes for the whole day. Whenever I dont use it, the save mode just takes the machine into hibernate mode. Just like a cell phone. Perfect.
Five star