April 25, 2019

This image is from the WIFI Overview Chapter from My New Book:

"Advanced iPhone Logic Board Testing and Diagnosis" by DeeGee

Watch this space for more information on the release.

Regards Dee

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...

February 27, 2019

So it’s been a while, so I would like to contribute once again.

This is exciting for me now the gloves are off after a year and I’m back in the game...

As the buzz at the moment is CPU/AP work, I thought I would post a stripped down version

of the Boot Circuit Generically...

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

October 18, 2018

M2800 Analysis: DeeGee

This component is M2800, aka Trinity Blue. This "chip" is basically a substrate for holding a few coils inside that tend to blow easily.
It includes:


Two coils for Backlight
One coil for the Taptic Engine (ARC)
One coil for the Speaker AMP
One coi...

October 8, 2018

 "Tristar & Tigris Testing Guide"  (NO PLZ BRO SOLUTION)

This is not a please bro solution but a way to find your own way around a fault with a meter and

a little bit of info on how to use it to find faults.


Please refer to Image Map that accompanies this article: Makes...

October 5, 2018

So today im posting about the relationship between Tristar and Tigris.

 This is a lengthy read.

I would imagine some may correct me here and there and thats what these posts are all about
it only strengthens the solution.

This is my understanding of the topic.

This s...

October 2, 2018

So I'm going to try and show two ways of repairing a problem Tristar job.

Its internals are full of switches and its referred to as a:

"Multi-Function Switch Arrays with Apple ID Bus Controller"

I have an iPhone 6 which is not being recognized by any of the PCs or Virtual...

September 25, 2018

So here we are again back tracking on the SMPS S_5 ground issue.

I have explained this one over so many posts, messenger and so forth that I am now lost in my own story. Factual I may add.

So whats this issue ? Well its in two parts really and is part of two cycles the...

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