I am learning how to repair Ubiquity Lite AP 120 radio . Yesterday I wrote note on how to check for bad capacitor on the PCB of the radio. I came across a diode which showed continuity between its terminal. And so today I wanted to write a note on…
I bought couple of Repairing Ubiquiti Lite AP 120 but they are all malfunctioning. One started to malfunction just after 3 to 4 months. Then I bought another and that 2nd radio antenna also got malfunctioning, also after using it after 5-6 months. …
I have been writing about various components and ICs found on the dell laptop motherboard. Following the powering sequence outlined in the note how laptops and PCs start up? I started taking note from the DC power input circuit to the I/O controlle…
Here I want to write note on the DDR3 (Double Data Rate 3) SDRAM (Synchronous Dynamic Random-Access Memory) used in the dell laptop. There are two slots for inserting the DDR3 SDRAM and they are connected directly to the Ivy/Sandy Bridge Intel CPU …
Continuing my writing note on my dell laptop components and ICs, I want here to write note on the GPU used in my dell laptop. Previously I wrote note on the Intel CPU Ivy/Sandy Bridge and other important ICs such as Panther Point Intel PCH chipset…
Today I want to write a note on the CPU used in my dell laptop which I wanted to repair. I wanted to know the circuit schematic of this dell laptop before I repair . So I have going through the dell laptop schematic for a while now. I started to loo…
I already wrote about the BQ24727 Battery Charger IC that is used in Dell Laptop. Today while inspecting ICs on the motherboard I came across another unfamilar IC which is the VT1318MFQX-1-GP which after bit of research is a power management IC (P…
I have been writing about dell laptop schematic for repair. Specifically I already wrote about various components like SI7121DN and FDV301N mosfets, dell laptop battery IC , DC power supply input circuit , the chipset NPCE885PA0DX I/O contr…
I’ve been learning how to repair Dell laptops for the past two weeks. I previously wrote about the DC power supply input circuit and listed all the components I found, including MOSFETs like SI7121DN and FDV301N, as well as various capacito…
After many days I am writing this note. My last work was studying the schematic diagram of dell laptop because I am trying to repair it myself. But to repair the dell laptop , I needed to find where the problem lies. Now there are lots of laptop re…
I came across the TPS51225RUKR IC while learning how to repair my dell inspiron laptop . I did not know what this IC was and so I am writing this note. The TPS51225RUKR is a synchronous buck controller IC designed by Texas Instruments (TI) , comm…
