Author Topic: Fraser has two new patients inbound - E2V ARGUS 4 & Seek Reveal Pro FF  (Read 1503 times)

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Online Fraser

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So when I return to the Seek Reveal Pro repair what will my next moves be ? Will I dive in with an oscilloscope hunting for noise coming out of Boost / Buck converters Or something else ?

Well it will be something else. I obtain valuable experience and knowledge when working on equipment that I repair. I make the most of the experience if it is a job for myself. I will reverse engineer the Seek Reveal Pro design topology and gather data sheets for all major components. I will then create a basic reverse engineered system diagram showing key components and points of interest. This document will help me when working on other cameras of the same model, if I should ever need to work on one.

Diving in with an oscilloscope would possibly track down the supply rail noise issue but this is offset by the lack of knowledge extracted from the repair and can also be inefficient if some form of reverse engineering node plot has not been undertaken to identify useful test points and connectivity.

That is why I will not be diving into the Seek Reveal Pro today. I will take my time working on it as the knowledge gained is often worth more to me than the price paid for the equipment. Remember, I already own a Reveal Pro and a Reveal Pro FF so this patient is “just for fun and learning”  ;D

Fraser
« Last Edit: June 27, 2020, 08:54:37 pm by Fraser »
 

Online Fraser

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Before anyone asks.....

With regret I do not share reverse engineered schematics for any thermal imaging cameras. It is legally too complicated on many levels. I detail my approach to this repair only as guidance to others who wish to follow the same path.

And remember .... these highly integrated ‘system on a chip’ based units are as much firmware as they are hardware. Schematics can only help to a certain point when firmware issues are involved.

Fraser
« Last Edit: June 27, 2020, 01:40:15 pm by Fraser »
 

Online Fraser

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Some pictures of the Seek Reveal Pro fault. I will also download better images saved on the camera.
 

Online Fraser

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The pictures as saved on the camera.

The temperature measurement is hilariously wrong but this appears to be related to the noise signal presence.

Fraser
 

Online Fraser

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Some saved pictures in the landscape orientation showing the dynamic nature of the noise bars

The camera is looking at the ceiling as a low Delta T target.

Fraser
« Last Edit: June 28, 2020, 11:07:59 am by Fraser »
 

Online Fraser

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Regarding the pentagonal security screws that used to be fitted to the seek Reveal series. I am pleased to advise that all three of my Seek Reveal units are fitted with standard T9, 6 point, Torx socket head screws  :-+  Seek obviously changed their mind about the use of such security screws.

Fraser
« Last Edit: June 28, 2020, 11:07:17 am by Fraser »
 

Online Fraser

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I just checked the Seek Thermal Datasheet for the J3 sensor board that hosts the microbolometer. It’s only I/O is SPi and 8 bit parallel data. All analogue processing takes place on this J3 PCB so its power supply will be carefully scrutinised. The 0V rails will also be checked for performance.

Fraser
« Last Edit: June 28, 2020, 04:52:08 pm by Fraser »
 

Offline Bill W

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Step one: shake the camera and see how many capacitors fall out.      :-DD    :-DD


Bill

Online Fraser

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 :-+ :-DD

I know exactly what you mean  :-+ Sadly no rattles in this case :( I might find an unpopulated capacitor pad though  :-// It will be interesting to see what is going on with the unit. I still think it is the best of the bunch listed as some of those others are a real gamble.

Regarding components floating around in a faulty unit..... I had some units (not cameras) that all failed to start and all rattled. Upon investigation the rattle was an SMD inductor in every unit. A production defect caused a power rail short that overheated the inductor that was in series with that power rail and desoldered itself. Power was then cut and the unit became one of a whole bunch of dead customer returns. It proved the units had never been power tested at the factory, despite the ‘QC’ labels. An easy repair though.

Fraser
 

Online Fraser

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Well the auctions for the faulty Seek Reveal cameras have completed. It would appear that I got myself quite a bargain if the end prices of those auctions are anything to go by ! Wow!

Did anyone here succeed in winning one ?

Fraser
 


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