REPAIRING AND NOT THROWING AWAY

REPAIRING AND NOT THROWING AWAY

Richtige Fernseher haben Röhren!

Richtige Fernseher haben Röhren!

In Brief: On this site you will find pictures and technical information about Service Modes, Circuit Diagrams, Firmware Update procedure, Disassemble procedure, Universal remote control set-up codes, Troubleshooting and more....

If you go into the profession, you will obtain or have access to a variety of tech tips databases HERE IT IS Master Electronics Repair !.

These are an excellent investment where the saying: 'time-is-money' rules. However, to learn, you need to develop a general troubleshooting approach - a logical, methodical, method of narrowing down the problem. A tech tip database might suggest: 'Replace C536' for a particular symptom. This is good advice for a specific problem on one model. However, what you really want to understand is why C536 was the cause and how to pinpoint the culprit in general even if you don't have a service manual or schematic and your tech tip database doesn't have an entry for your sick TV or VCR.

While schematics are nice, you won't always have them or be able to justify the purchase for a one-of repair. Therefore, in many cases, some reverse engineering will be necessary. The time will be well spent since even if you don't see another instance of the same model in your entire lifetime, you will have learned something in the process that can be applied to other equipment problems.
As always, when you get stuck, checking out a tech-tips database may quickly identify your problem and solution.In that case, you can greatly simplify your troubleshooting or at least confirm a diagnosis before ordering parts.

Happy repairing!
Today, the West is headed for the abyss. For the ultimate fate of our disposable society is for that society itself to be disposed of. And this will happen sooner, rather than later.

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..............The bitterness of poor quality is remembered long after the sweetness of todays funny gadgets low price has faded from memory........ . . . . . .....
Don't forget the past, the end of the world is upon us! Pretty soon it will all turn to dust!

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All posts are presented here for informative, historical and educative purposes as applicable within fair use. NOTHING HERE IS FOR SALE !

Saturday, 16 February 2019

GENERAL PRINCIPLES, LAPTOP POWER CIRCUIT

General principles, Laptop power circuit

LAPTOP POWER SUPPLY CIRCUIT EXPLAINED USING TPS51020 IC.



Here IC TPS51020 is 3v3 and 5v power supply.  
. IT8511 is SIO. A / D Dock In the power adapter plugged in VBAT is the battery power AC_BAT a source for the entire circuit, it can be obtained from Adapter or Battery. * Operation: Power levels for IC AC_BAT 3v3/5V source (pin 24 TPS51020) 5V self-power IC 3v3/5V (TPS51020 VREG5 22 feet) for SIO 3v3 SIO received from the IC line 5VAO 3v3/5V SIO AC_IN detector voltage (See Adapter is used or not) SIO ordered 3v3 and 5v power on (EN1 and EN2) TPS51020 create 3v3 and 5v (a branch of the 3v3 or 5v will give feed back to power SIO) remaining for the entire circuit. TPS51020 Power Good signal (PWRGD) on the SIO Click the button and wait 3v3 sources on the power button. When you click the source button, open orders SIO secondary sources (also known as power) as the source RAM, power chip Nam, North chip, chip VGA source SIO continues to open source for CPU Vcore complete the circuit size of the source. * The order size source test circuit: AC_Bat sources have to be pin and IC power 3v3/5v (TPS51020). This is open source = 1 or 2 mosfet and is pictured with charging circuit. Refer all battery charging circuit and open source AC_Bat. TPS51020 to create and have 5v (VREG5) for SIO. SIO to open the command EN1 and EN2 of TPS51020 (if lost, we can find ways to assume the command-level pressure). EN1 and EN2 Has there must be a 3v3 and 5v OK, 3v3 and 5v pins to high PWRGD 3v3 and 5v pins click ok, then the source must be 3v3 When you click the source, if the other secondary sources are OK, the entire source will run. A secondary source in the "problem" circuit "protection" and disconnect all sources
Posted By: FRANK at 04:09
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