March 27, 2020

Todays post is a bit different to my normal iPhone Jobs.

Samsung Galaxy Xcover4 - SM-G390F (FRP LOCKED)

Bootloader U5 Android Pie 9.

The reason im posting this is due to having to mod the stock firmware as none of the other methods worked.

The Sim tray is side on nex...

January 26, 2020

I have been asked why no x series or newer models in my posts.

They are in the book and to be fair not much to diagnose in the sandwiches.

1V8_S2 dropped pads, bad layer connections and so on, Apple have made it so easy to check now based on common layer points of fa...

October 4, 2019

iPad Charging Principle - DeeGee

1)

The device is powered by the battery when its connected to the battery connector. J7500

2)

From the battery positive terminal on J7500 the voltage will pass on to the PMIC U1800 to allow the device to have its power supplies. This is han...

October 2, 2019

This is an old article I published last year for MIKROS , the original link for the paper is not in use anymore so I thought I would share the article again.

Here is the link . Download HI_RES PDF

 
Hope it helps a few!

Regards Dee

August 29, 2019

So the new buzzword is IR Independent Repair and BOBAJOBs turnaround to allow 3rd party repairers to perform out of warranty repairs, access to  tools and all the rest of it.

It would be Naive to think  this is good for the Microsoldering Crew.

I see this as the ground...

May 12, 2019

I responded to a post elsewhere and thought it should be here with a little upgrade:

iPhone with Weak WIFI signal, Antennas Replaced, Hasn't pulled the WIFI IC, only a couple of Access Points in the list.


So we know the WLAN module is working as its able to scan and p...

March 31, 2019

Here we have an incoming RF transmission on the EE network 4G

This is very similar to an i6s Transmit/Receive Transmission.

Band 7/2.6 frequency.

Check your sim band:

Field Test Mode: Using Dialer = *3001#12345#*

Look for serving cell info - frequency band should be in ther...

March 7, 2019

Last year I posted about the cotton wool heat sink method which could be used for the Audio / Base-band issue whereby the work floats the underside of the board resulting in no service.


This method was originally for the CPU protection when working on the PMIC directly...

December 9, 2018

Todays post is about troubleshooting DFU Mode on the iPhone and is Outlined in this paper  which is now available to  download....

Download: Here

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