yashsingh1/xdaforums huggingface dataset:
[MTCB Hardware Development] marchnz:
Expanding on this; thanks to [MENTION=456516]typos1[/MENTION] for his time and efforts in organising this group buy, apparently motivated by finding the cheapest possible 2GB upgrade route for many owners by both organising this buy and creation of a new thread documenting the process from your initial posts on the audio mod/firmeware post. Thanks again [MENTION=456516]typos1[/MENTION].

I'll share my experience once the memory chips arrive.
[MTCB Hardware Development] typos1:
Cant disagree with that, it WAS risky doing it by gift - I m pretty sure I would NOT have paid someone I only "know" on the internet a payment with no guarantee of getting my money back if the goods didnt materialise.

But it was the only way I could avoid the risk of Paypal taking money from my account if there was a problem with the RAM and someone claimed against me (obviously I will contact IM on behalf of anyone if there is a problem).

Luckily I know that I m trustworthy, if even if others dont/didnt ( [MENTION=4749043]wernus24[/MENTION] does now, others will do when they get their chips).

Thanks everyone for trusting me.

:)
[MTCB Hardware Development] marchnz:
Re. Risk - Ive never been part of an internet group buy and agree in part.

For me, risk assessment was based on the organising member reputation (typos1, who has a strong rep.) the numbers involved and total cost. Those who asessed the risk too great probably didnt participate - there was no coercion.

Regards,

Marc
[MTCB Hardware Development] wernus24:
This is XDA forum, not market square ;)
[MTCB Hardware Development] marchnz:
You're welcome, thanks again! Refunding a few cents was overly generous of you!

I dont see anyone "marketing" anything; I see forum members supporting each other and "developing" the hardware, dont you? BTW, have you considered there is no guarantee that IM/Agents will continue to supply anything other than bulk and I dont see resellers offering these ICs.
[MTCB Hardware Development] typos1:
:)

I dont think he meant it negatively - English is not his first language, I think he meant because its a forum where (most) people help each other then thats why I was trusted.
[MTCB Hardware Development] kumarai:
Soon I received a shipment of 20 chips.

We will try!

By the way, the investigation showed the chips suitable for other devices, will try to use.

Greetings from Russia, thanks typos1, dsa8310!
[MTCB Hardware Development] typos1:
Cool ! Hope all goes well :)

Anyone know what the hell hes on about ?
[MTCB Hardware Development] marchnz:
Might have something to do with illuminati and aliens?

I get why some chose not to participate.
[MTCB Hardware Development] wernus24:
I meant that here on XDA we can trust each other ( Yes I know we shouldn't trust anyone on internet but xda is such a nice place ;) )
[MTCB Hardware Development] typos1:
LMAO !

Yes, I thought you meant that :)
[MTCB Hardware Development] mouscolo:
guys, I need to join you and I want 2gb board, how to process and pay plz :)
[MTCB Hardware Development] nuovagrafica:
Please can I have the tracking for check the dispatch
[MTCB Hardware Development] typos1:
PMed
[MTCB Hardware Development] nixfu:
Someone should try to find a place in the USA that would be willing to do the board chip work for a decent price. People could remove their CPU boards, they are installed with two screws and a snap in like a RAM stick on a computer, and ship that tiny board to that person for the quick BGA chip replacement and whoever did this could make a pretty good profit for just a little bit of work and super cheap shipping costs. Shipping could be done in a stiff envelope.
[MTCB Hardware Development] typos1:
Yeah but for people the other side of the Atlantic it would not be so cheap, you would have to insure the package as well fro about $130 as that is what the SoM is worth.
[MTCB Hardware Development] nixfu:
Where is the post showing the pictures of replacing the chips on a board?
[MTCB Hardware Development] wernus24:
http://xdaforums.com/showpost.php?p=69505171&postcount=11

http://xdaforums.com/showpost.php?p=69753247&postcount=263
[MTCB Hardware Development] oskaratk:
deleted
[MTCB Hardware Development] typos1:
Remove this post and ask him for his email address via pm then communicate that way, I ve told you and pmed [MENTION=3571623]oskaratk[/MENTION] - no selling is allowed on XDA only one .link in your signature for Swappa, you guys will get banned if a mod sees this.
[MTCB Hardware Development] nuovagrafica:
waiting for 2gb ram I wish to know if my MTCC head unit has removables soM or if I must desolder the old 512MB+512MB ram and replace them soldering the new ones and what risks I have to damage my head unit if I find someone that makes the job for me
[MTCB Hardware Development] mouscolo:
its the matter with 2 or 3 screws, i did the upgrade by myself from dual to quad SOM and it was my first time :) just enjoy it :D
[MTCB Hardware Development] nuovagrafica:
And what risks there are desoldering and soldering the ram from myself without a bga station?
[MTCB Hardware Development] oskaratk:
here is a nice tutorial: https://olimex.wordpress.com/2014/05/29/bga-chips-soldering-and-replacement-tutorial

Oskar
[MTCB Hardware Development] typos1:
All SoMs are the same on MTCB and MTCC devices ! But you still need to de-solder the old RAM chips, obviously. It is very delicate if you dont have much experience it may be best to get someone to do it for you.
[MTCB Hardware Development] Mucho79:
Worked for me [emoji1]

The next member of the 2GB Ram Club !
[MTCB Hardware Development] typos1:
Cool, thats 3 members of the 2GB club, how did you install it ?
[MTCB Hardware Development] wernus24:
Welcome!!! :highfive:
[MTCB Hardware Development] tipouce:
Hi,

Memory mounted this evening and all works great :)

In addition, i added heatsink on the CPU+memory (just in case) and i update to september rom found here.

All is fine.

Thanks.
[MTCB Hardware Development] typos1:
Cool, did you do it yourself or did you get someone else to ?
[MTCB Hardware Development] tipouce:
I did it by myself :) (it's a part of my job) even if i don't have all professional tools at home.

Just my eyes :cyclops: to adjust the position of the circuit and a hot air station.

15min
[MTCB Hardware Development] typos1:
I see, I m in 2 minds whether to do it myself or not . . .
[MTCB Hardware Development] tipouce:
I don't kown of it's your job but i give you some advice (for others too if they want)

If you want do it by yourself, it relatively easy.

If you have not air station, you can use air gun but do not heat more than 300-350° and air flow not so big if you don't want see the capacitors or resistors flying.

To be easyer and prevents the circuit from lifting, add flux paste or flux liquid (heat the liquid a bit to make it sitcky and avoid that it boiling under the circuit) :

for me, i use a home made heater (set to 150°) and a silicon pad under the PCB so i can heat less with the air gun. (see attachment)

Hope you will understand my bad english ;)
[MTCB Hardware Development] typos1:
Not my job but I have soldered before, although not such small chips.

I had decided to do it myself with a hot air gun and lots of masking, but if it goes wrong then I may have a dead SoM so maybe not, we ll see I guess.

Your English is very good, much better than my French. :)
[MTCB Hardware Development] mouscolo:
so now does it feel any better? its worth to upgrade it? faster? better performance?
[MTCB Hardware Development] Mucho79:
Yes, it was worth the upgrade. System boots a little bit faster, Google Maps and Navigon start much faster, browsing with Chrome feels much smoother and I would say the whole performance is much smoother and faster.
[MTCB Hardware Development] mouscolo:
with 5.1?

so no more lags with googles...etc?
[MTCB Hardware Development] Mucho79:
With 5.1...running DSAs Rom from October.

I only managed it to test it yesterday for about 20 min, had no lags with Maps. I would say Maps started in about 3 sec, Navigon in about 3 - 4 sec.

Befor the upgrade I had to delete Chrome because it was so laggy. Now with 2 GB it is running really well. Maybe the other guys with 2GB can confirm that.
[MTCB Hardware Development] mouscolo:
that is good news, coz iam installing 4.4, I cant get more lags with maps etc.. am gonna wait my 2GB then to upgrade it again :D

tnx for the infos :D
[MTCB Hardware Development] jakejm79:
Got my RAM today, thanks [MENTION=456516]typos1[/MENTION]

Does anyone have any suggestions on anywhere to do the job in the US? I have emailed a couple of places around here, but they are all set up for larger jobs, by the time you figure in the setup costs, etc it makes the cost of doing just 1 unit ridiculous.
[MTCB Hardware Development] mouscolo:
umm one sec, so you mean u guys only bought the rams, which not yet installed to the SOM? i tho we buying all together xD
[MTCB Hardware Development] tipouce:
Hi,

Exact the same as Mucho79 for me. (2Gb +september rom)

For the boot, i didn't see big difference but when i swap from an app to an other, there is no lag.

With stock +1Gb, with navigon i had to wait 1 or 2 min before really go (near 10-20sec to pass to the next screen) and now it starts very quickly (not like my phone LG G2 but it's ok)

The most difficult is to remove the memory and clean the PCB:

1) Remove the memory: (tools : air gun + tweezers)

Heat the BGA for about 2-3min at 300Â° max then, while you are heating, try to take the BGA with tweezers and lift all (bga + pcb without retaining it) by 2-5mm : if the tin is melted, the PCB will fall and the BGA will stay in tweezers. If not, rest all and continue to heat and try again 1min later.

2) Clean the PCB: (tools : soldering iron 300Â°+ flux+ desoldering braid + flux cleaner)

1 PAD removed = PCB dead

Use flux (important) and desoldering braid. To avoid pad removal, ALWAYS keep the iron on the braid. Move both slowly at the same time and in the same direction to remove tin.

Do not press hard but just drag the braid.

If you lift the iron, the braid could be soldered to the pad and if you pull the braid, bam, no more pad.

It's clean when you don't feel anything to touch (see attachment)

Clean gently the PCB with flux cleaner brush.

The most easyier : installing the new IC (tools : flux + air gun)

Put flux on pcb and under the BGA. If it's liquid flux, heat both at 100Â° until obtain sticky sensation (like glue).

Place the BGA in the good position and start to heat at 300Â° with air flow at minimum to avoid the lift of the IC.

Heat 2-4min all the IC evenly to melt all the balls : you can see the BGA corrects his position alone (you DONT have to push on it).

Remove the air gun and wait 30sec for the pcb to cool down then look at the BGA closely to watch the result. Heat again if the IC is not on a correct position.

And voila :) very easy
[MTCB Hardware Development] doitright:
Just to add a little bit to that, my recommendation for when you go and learn new soldering techniques, is to find some JUNK to practice on, before you take on the objective. It is a sad day when you completely wreck something that you were trying to improve.
[MTCB Hardware Development] oskaratk:
looks like we need a new group buy - I am volunteering to do so.

On page 1 of this thread is about 10 interested fellows.

As I am located in the US, no hassle to deal with EU VAT. So the base cost for a set of 2 chips is:

$18 the chip, $2 share of inbound freight => $40 a set plus outbound shipping. Shipping cost of course vary - I can ship postal service ( USPS.com ), UPS (ups.com) or FedEx (fedex.com). You would need to go to their website and figure yourself what carrier and what service you want. USPS of course will be the cheapest .. but may take a bit

I can have the chips ready to ship within a few days .

Will put the order in as soon as I have 10 people confirmed in the group buy. PM me if you'd like to participate - I think typos1 will help to keep the list in the first post up to date

Oskar
[MTCB Hardware Development] mouscolo:
i need to know that i inly buying the ram chips without SOM?

coz here i can guarantee 100% that no ine doing this works :/
[MTCB Hardware Development] oskaratk:
the group buy it is only the 2 memory chips. Soldering is on your own - DIY .. do it yourself :)
[MTCB Hardware Development] mouscolo:
ouch :/
[MTCB Hardware Development] nuovagrafica:
I received my 2gb set today, thank you very much tpos1 ?
[MTCB Hardware Development] typos1:
No probs :)
[MTCB Hardware Development] marchnz:
And a set arrived at home today. Thanks!

Think it may have been opened at the border - Did you use that brown packing tape on the parcel and the conductive foam?
[MTCB Hardware Development] typos1:
Yes, I used the foam from the IM packaging , tipped the RAM in without touching it, pressed the foam together and then used the tape to hold it.
[MTCB Hardware Development] zorantoma:
For any one that has a MTCD board REV:3.0 the ram is not sutible. It doesnt boot up. Just to let people know.
[MTCB Hardware Development] typos1:
Oh no, theres deffo nothing wrong with the soldering ? Who was it that said it would work with MTCD units, [MENTION=6041319]dsa8310[/MENTION] ?
[MTCB Hardware Development] nuovagrafica:
I'm from Europe, where can I buy another MTC_RK3188 rev0.2 like in the picture for my MTCC head unit if something goes wrong with the soldering?

[IMG="MTC_Rk3188 rev0.2"]http://www.emigrantwebtv.com/temp/MTC_RK3188%20rev0.2.jpg[/IMG]

is there the possibility to use another som in my MTCC head unit with a different SoM (cpu and ram) more powerful?

coud it work?
[MTCB Hardware Development] marchnz:
How did you validate ram was not compatible? Pic in 355 is identical RAM to our MTCD units.

Sounds like a defective RAM, bad soldering or damage to SOM during soldering. Who installed the RAM?
[MTCB Hardware Development] zorantoma:
The soldering was done at a profesional shop and they werified all the soldering. The unit gets power(button lights go on) and then nothing more.

---------- Post added at 07:34 PM ---------- Previous post was at 07:31 PM ----------

They dug up the data sheets of both rams and the pin layout is difrent.They wil rebowll the old ram and we will see if it boots up then.
[MTCB Hardware Development] typos1:
It only needs to be an MTCB/C RK3188 SoM the rev bit is not relevant. I think some people sell them still on Aliepxress/Alibaba, [MENTION=2366275]doctorman[/MENTION] can get hold of them.

The only other SoM you can use is the dual core RK3066, once someone gets hold of a Klyde octacore unit if it is MTCC there MAY be the possibility that you could upgrade your SoM to that type.

Lets hope it boots, maybe you can send a pic of the original MTCD SoM to IM and see what they say ? Read back through the thread and see if [MENTION=6041319]dsa8310[/MENTION] verified it was correct or whether he asked IM.
[MTCB Hardware Development] marchnz:
Thanks for the heads up. I will review the datasheets between original mtcb rev 0.1 and mtcd v0.3 RAM and post my results here. Note when i had a cursory review, it appeared compatible but I did note a difference that I considered just an abbreviation difference between manufacturers.

Stay tuned.
[MTCB Hardware Development] zorantoma:
No problem. The funny thing is that the rear camera works when in reverse.
[MTCB Hardware Development] jakejm79:
The rear camera works outside of android (allowing almost immediate use before bootup). In fact if you could initialize the radio you would also be able to get that to play, but to get it to initialize you need to run the android radio app.
[MTCB Hardware Development] typos1:
Youre talking MTCB/C ? All RK3188 SoMs work on all MTCB/C devices.
[MTCB Hardware Development] marchnz:
Hi, I have just validated the pinouts between the Original MTCB-H5TQ4G63AFR and MTCD (v0.3) MTCD-K4B4G1646E-RAM.

They are ***Pin for Pin identical**. So [MENTION=456516]typos1[/MENTION] - jsut confimring - the substitute RAM you obtained from IM, others have installed with success yes?

MTCB:

MTCD:

Next steps to review datasheets between MTCB and MTCD RAM specs/tolerances.
[MTCB Hardware Development] typos1:
Yes, you can read the people who have installed it in this thread.
[MTCB Hardware Development] zorantoma:
Just to be clear, I am not blaming anyone for this but me. ???
[MTCB Hardware Development] marchnz:
OK, thanks [MENTION=456516]typos1[/MENTION] - Final Update. I have reviewed all three data sheets last being IM8G16D3FBBG.

*** They are PIN for PIN and spec compatible. The supplied IM8G16D3FBBG is DDR3L, being 1.35v, 1.5v "tolerant". This from the datasheet:

Power supply : VDD, VDDQ = 1.35V (1.283V to 1.45V)

- Backward compatible to VDD, VDDQ = 1.5V Â± 0.075V

I dont see any differences which would impact operation. [MENTION=1249599]zorantoma[/MENTION], can you please revise your post #333. I will be proceeding to replace the memory in unit next week.

Cheers,

MA

---------- Post added at 11:57 AM ---------- Previous post was at 11:53 AM ----------

An MTCB SOM wont fit an MTCD, the header changed to riser pins/socket, away from that nice "slot" connector.

Suggest "cost saving" on MTCD to further increase product margins.

Thanks mate!
[MTCB Hardware Development] typos1:
Hmm, a faulty module ?

Yes, I know MTCB/C SoMs are totally different to MTCD ones. When you said "rev 0.3" I thought you may be talking about MTCB/C (notice no "D" !) and the different revisions between MTCB and MTCC boards, not the differences between RAM modules, because [MENTION=1187946]nuovagrafica[/MENTION] mentioned the different revisions between MTCB and MTCC SoMs
[MTCB Hardware Development] marchnz:
Please revise given updates today which suggest your experience may be isolated.
[MTCB Hardware Development] zorantoma:
I will,but i think we dont have the same chips. Some pics to clerify
[MTCB Hardware Development] typos1:
I think [MENTION=1249599]zorantoma[/MENTION] was the only person to get RAM for an MTCD unit, everyone else got it for MTCB/C.
[MTCB Hardware Development] tipouce:
Hi Zorantoma,

I don't understand your pics : is it about before/after pics from your own board ?

Because the original memory is the same as mine before
[MTCB Hardware Development] nuovagrafica:
who did already install the ram? what mcu version and what ram IM8G16D3EBBG-125I or IM8G16D3FBBG-15E?
[MTCB Hardware Development] tipouce:
If i'm not mistaked : IM8G16D3FBBG-15E

MTCC RK3188 KLD9 2.98 (original KLD6 2.91)
[MTCB Hardware Development] nuovagrafica:
dsa has tested IM8G16D3FBBG-15E with success but who has tested IM8G16D3EBBG-125I?
[MTCB Hardware Development] typos1:
No, [MENTION=6041319]dsa8310[/MENTION] had the 125I, he did not test the 15E, Felix from IM said the 15E was an alternative to the 125I.

Read this thread to find out who has had their RAM installed !!!! Its all here written down !

Only one person other than me had the 125I, everyone else had the 15E (just checked my pms and it was you that had the other 125I !).

I just dont get why some people just come on and ask something without reading the thread first to see if its already been mentioned - to answer your question I d have to read the thread to find the answer, then type the answer in a reply so why dont you just read it yourself ??
[MTCB Hardware Development] marchnz:
What do you see different? My understanding is you said that the BGA guy who fitted your ones said they had pin differences. I reviewed the spec sheets and found them pin-pin compatible. I also reviewed the data sheets specs and could find no difference - apart from new chips being ddr3L - our chips being 1.5v compatible.

From the spec sheet:

http://xdaforums.com/showpost.php?p=69887092&postcount=346

If you still don't think they are, please list your reasons.
[MTCB Hardware Development] zorantoma:
Lets wait till monday afternoon when i go to the shop and find out if the unit boots with the old ram. 1.35v-1.5v tolerant is not 1.5v fully capable.
[MTCB Hardware Development] marchnz:
Have you read the threads and or specs.?

Note:

15E = DDR3-1333 CL9-9-9

125 = DDR3-1600 CL11-11-11

E = 1.5V (DDR3) G = Green / RoHS

F = 1.35V (DDR3L, 1.5V tolerant)

The above are backwards compatible. Either version you get, will work fine.

---------- Post added at 10:05 AM ---------- Previous post was at 09:49 AM ----------

According to the specs they are!

VDDQ Supply DQ power supply: 1.35V, 1.283 - 1.45V operational; compatible to 1.5+/- 0.075V operation.

VSSQ Supply DQ Ground

VDD Supply Power Supply: 1.35V, 1.283 - 1.45V operational; compatible to 1.5+/- 0.075V operation.

Please do us a favour and check the power to the sdram

Vddq (on A1). And vdd on R9. - I have an MTCD so would appreciate it.
[MTCB Hardware Development] typos1:
Didnt [MENTION=6041319]dsa8310[/MENTION] say something about the power capacitor between the chips (at least on MTCB/C) should be checked ?
[MTCB Hardware Development] marchnz:
Where did you see that? I would expect to see power supply decoupling caps (0.1u) in on all rails close to the sdram chips - the number and value wouldn't change between devices.

Unless the VDD is running above 1.5v but then smoke rising from the ram chips or noticeable overheating would have been evident. If supply was above spec the entire SOM would cook. Sounds like a bad SOM - my understanding is you have to be very careful not to flex or disturb as the original BGA soling may not have been perfect. I.e his one is defective.

Also note JDEC spec (from wikipedia)

The DDR3L (DDR3 Low Voltage) standard is an addendum to the JESD79-3 DDR3 Memory Device Standard specifying low voltage devices. The DDR3L standard is 1.35 V and has the label PC3L...... The DDR3L and DDR3U specifications are compatible with the original DDR3 standard and can run at either the lower voltage or at 1.50 V.[19]
[MTCB Hardware Development] typos1:
Either in this thread or his "October/September Firmware" thread, pretty sure it was this thread, havent you been following it ?! :)
[MTCB Hardware Development] marchnz:
After reviewing specs and finding no apparent issue, I took a second look at your unit pics - that lower bga ram chip looks misaligned. Top looks fine.
[MTCB Hardware Development] zorantoma:
Thanks for the heads up,as i also saw that,but aparantly the chip sits perfect. I send them a mail regarding your posts and i hope they read them before they do anything else.At this point i only wish to get my unit working again,becouse it's a pain in the a.. To drive 250km a day in total silence.
[MTCB Hardware Development] marchnz:
You must be very disappointed. Would you mind posting an update once your unit has the original reballed ram modules reinstalled? Very curious because I really can't find a technical reason why it didn't work out. I was about to install.

Do we have any other MTCD users following here?
[MTCB Hardware Development] zorantoma:
I will post it monday afternoon,when i get home. No problem. I am a little disappointed,becouse this unit rocks in my 2010 passat. But it is almost cristmas to wish for a new toyðŸ˜ðŸ˜ðŸ˜ðŸ˜ðŸ˜
[MTCB Hardware Development] marchnz:
Post found. Compatibility was discussed and ageed no incompatiblity issue. The rk3188 specs were also reviewed

http://xdaforums.com/showpost.php?p=69474678&postcount=89

Pitty dsa8310 went offline, he is technically knowledgeable and has contributed alot to the forum.
[MTCB Hardware Development] marchnz:
Id say. Final post on compatability - here is an MTCB SOM with same RAM (k4b4G1646E BCMA) as our MTCD SOM successfully upgraded to 2gb with specified RAM:

http://xdaforums.com/showpost.php?p=69753247&postcount=263

Sorry but all info points to install.

Just a few final thoughts - did you reinstall the module with ground screws and try holding reset button and power on?
[MTCB Hardware Development] typos1:
Thats not the post it was referring to, it was one of [MENTION=6041319]dsa8310[/MENTION]'s where he mentions about the capacitor (or whatever it is) between the RAM modules.

It is a shame about dsa, but it was his own fault.
[MTCB Hardware Development] oskaratk:
Just out of surgery, works perfectly:
[MTCB Hardware Development] typos1:
Cool, think youre the 4th memeber of the club now ?