Samsung J120H Shorted Solution

When I connect to 3.8V my digital power supply shut-off. Even on low voltage 1.3V it also shuts-off. This means that the J120H board is fully shorted.

What I did was to put a 3.8V supply using my CD-R KING power bank :) As I connect the board to my power bank, 1 component has been burnt out. The is the capacitor. The shortage was gone after I removed the capacitor. I powered it on, and the J120H unit went well :)

using power bank as a supply

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Samsung J120H Switch Ways Solution

The image below is the J120H or often called as J1 2016 is the power switch ways. Just apply a jumper if the connection is open.

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Cloudfone GEO 402Q Can Charge, But Can't Power On

This Cloudfone GEO 402Q is charging but it can't power on. Below is the Cloudfone GEO 402Q power switch ways. I trace it and I found out that the negative connection is open. SOlution is by jumpering, like shown in the image below.

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Repairing iPhone 4 Wet Unit

I got this wet iPhone 4 few days ago, and the board was shorted when I checked it on my analog tester after I disassembled. When a unit is shorted I use to connect it on my power supply with 3.8V. When I connect it to my digital power supply with 3.8 volts, my power supply shorts, or in other words it will display 0V and 0A. This will prove that the unit has a full short.... When this happens I use to turn down the voltage on my digital power supply. I use 1.3 volts. Then I connect again to the board, and it displays high ampere current, but my power supply doesn't short. That's good! The next thing I used to to is to touch the iPhone 4 board and feel if there's a component that is hot or heating. The most common components that easily heats up are capacitors.

Finally I traced the hot component. And that is the camera flash IC. This IC is sealed. I removed the camera flash IC via hot air. After removing, the shorted is gone. I assembled the iPhone 4 immediately. Viola!

I explained to the customer that I don't have that kind of IC. I told her that the most important thing is that her iPhone can now be use :) Hirap talaga mag english. Dugo na ilong ko huhuhuhu.

remove camera flash ic

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iPhone 5 Schematic Diagram

DOWNLOAD iPhone 5 Schematic Diagram

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iPhone 6 Plus Schematic Diagram

DOWNLOAD iPhone 6 Plus Schematic Diagram

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Repairing Shorted Samsung SM-T231(No Power)

When I am repairing a unit with shorted board, I always connect it to power supply. There are 3 things I must check. (1) If it is full shorted. That the power supply will show zero reading. (2) If it is half-short(that's what i call it). That the power supply will not go to zero reading but it has high ampere reading. (3) If it has s small short. That the power supply will not go to zero reading but it has very low ampere reading. These are my own description.

I repaired this Samsung tablet with model number SM-T231 in just a few minutes. I only got hard time in dismantling the tablet because its very hard.

And after  dismantling the tablet and found out that its board has a shorted board. I checked it on my analog tester and it has zero reading.

I connected my digital power supply alligator clip positive to the positive terminal of the tablet, with respect to negative. It has a high ampere rating. And if it has  high ampere rating what I used to do it to put my fingers on each of the components on the board, most especially the capacitors. You know why? The deffective component/s will get heat! And like what I have expected, one capacitor heats up. I quicktly determine what component is deffective. Just see the picture below. As I have expected, CAPACITOR!

After removing the capacitor, shorted reading is gone. Ans the tablet can power on now. :)

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Repairing iPhone 6S Plus No Light On LCD

If there's no light on LCD, most probably there;s no supply on LED. You must get a supply from a capacitor to make the LED light.

right

left

All credits to my friend abe05 :)

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O Plus Air Charging Port

This is an O Plus Air board. You can see the charging port design. Very easy and safe to replace whenever your charging port has been damaged.

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Repairing MyPhone Infinity Not Charging

MyPhone Infinity's charging port was damage, and all the pattern in the board was all gone. The very first thing to do this is to find the charge positive line. 

Below is the image of the positive line. Make a jumper on the charging port with respect to ground. The second image indicates that the positive line was correct, and it show success charging.

Finally re-assemble the unit and you're done

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