yashsingh1/xdaforums huggingface dataset:
[Android Software Development] tihsamikah:
Apologies mmmalas for taking ages to respond - I've had some other issues going on lol

I could find specific examples - but as you go though here you will find more people with issues

https://www.avsforum.com/forum/68-d...tor-4k-version-4k-resolution-launched-50.html

as for the hours - I've only had the projector for a few months, and yes it just got progressivly worse.

its not an overheating issue (in terms of how hot Australia is at the moment) as I've had the projector during our winter - so it was only getting up to 20 or so degrees C.

Good Point you noted mmalas on your comments on sending the projector back to get fixed.

you would have to trust they would actually repair it, and if they sent it back to you would have to pay import tax again.

I purchased mine off Gearbest - and using their support helpdesk they were pushing for ME to contact the manufacture to get it repaired - and weren't very helpful.

but once I used paypal to contact them, they changed their tune pretty quick - and were either going to give a piss weak refund ($650 AUD) or let me send it to Hong Kong to repair.

I sat on that thinking about the best decision, but for the reasons you indicated I'm not going to waste my time.

I'm quite happy to crack my projector open and have a look at reflowing the solder - might have a look on the weekend.
[Android Software Development] Jusch1995:
Same here, the time to start up is getting longer and longer every day. I can confirm it's no overheating issue. I opened up an issue today, but after reading your experiences I'm not really optimistic right now. I should open a PayPal issue as soon as they aren't helpful. I'm from Germany so i also do not want to send it back to Hong Kong because if I do that I might never see my projector again.

I would really appreciate it if you could provide me information as soon as you found out how to fix it.

I can't understand why it only has problems when it starts up, but then it works fine for 10 + hours without a problem. It seems to have something to to with the laser unit gettin power or something like that.

If in can help in any way, just let me know how, and I try my best.
[Android Software Development] mmmalas:
I had myself offered from reseller (I bought from mainland china) to send to Xiaomi, and really do not want to go that route.

thanks, I had gone through tihsamikah, and this confirms my theory on the reflow issue.

there was a video on youtube, sadly its removed now as the owner account was closed. where he opened the projector. it was fairly simple process:

1- remove the screws, I think those are hidden under the feets all accessed from the buttom

for screw locations, check the first image in this and notice the long white screw holes

https://fccid.io/2AO2D-MJJGYY02FM/Internal-Photos/Internal-Photos-3920969

2- the projector lifts up, and speaker grill can be removed, and you will end up with the whole projector

3- under the L shaped black thing, there are 3 Lyers of PCBs connected to each others with cables.

those are

a) power Delivery (PSU)

b) android logic board, which also host the connections at the back (I think this is the only difference between the international and Chinese model but this is just a theory)

c) Video controller \ driver to the DMD chip

3- the board where the video controller chip, is the most likely candidate, since DMD failure would be very different from what you saw.

4- on the right side (this is for your info, please do not touch it ) is the laser assembly, do not open, as its sealed system.

its laser source then shines toward the DMD chip, (DMD imagine tiny mirrors instead of pixels, those switch direction to reproduce black \ white)

this light is reflected off the DMD (when its white) and pass through the color wheel, which constructs a full image, but with a single color,

DMD switch again, syncronized with the color wheel, and thus construct the second color, etc until full image is formed.

there is massive heatsink to cool the laser and the back of the DMD chip itself. but as I mentioned, this

5- rest of the stuff, is fans\ speakers, modules could be wifi \ bluetooth etc. but there is not need to remove those.

when you open it up, take res photos of the boards, and remember which side the DMD chip plug to, trace the PCB to check where most of the lines are going, this would be the faulty chip that needs reflowing.

Google the part number and it should match my description.

best way to reflow is to remove the chip, clean it, and resoldier it again. it's not a hard process in the right hands.

I will send you my phone number privately so you can talk on what's app if you need more details during the disassembly.
[Android Software Development] tihsamikah:
mate you have been awesome already - and extremely helpful to myself and others on XDA :)

talking on the phone might be hard as we are about 13 hours (give or take) in front but again I really appreciate you wanting to help :)

I'll see how I'm looking on the weekend - and if I do open it up, I'll crack out my DSLR and try take some decent photos of what I'm doing - hopefully that will help others :)
[Android Software Development] wire_less:
Thank you Spocky12 for the new 3.0 version of the tool. I installed it on my Fengmi 4k as an update from the previous version no need to uninstall it first.

I think I have found 2 bugs:

1. The option for quick keystone correction by long pressing the menu button is not working any more, you have to go to the full image menu to access this.

2. When you change the image resolution from the tools from 1080 to 4k and vice versa something breaks in the Bluetooth remote and only the power button works and you need to have plugged in or connected a mouse. A reboot fixes this.

Also something I discovered is that by using latest Smart Youtube TV app from aptoide you can stream 4K but it is very laggy with stutters. How can this even work without native VP9 codec support from our projectors and could this be fixed?

Cheers and keep up the great work!
[Android Software Development] wire_less:
Here is the original teardown video from China:

https://xw.qq.com/cmsid/20170721A038NA
[Android Software Development] mmmalas:
you are a star,

I have no idea how did you find it!

so it seems you do not even need to remove the board at all, as its the first one on top.

on the bottm layer of the PCB is the LED driver (what they call laser), you do no need to touch that.

the chip is facing upward when you remove the top cover (black L shape).

there is not enough High res pictures \ video around, but it looks its the iChip or the Thine Chip or the DLPC3 whatever number comes after it.

to test it out, without removing the chip. point heat gun at the chip for 5-10 minutes, then power on the projector.

if it turns on right away, then you got your chip, otherwise then its not the right chip.

if thats the case, wait for the PCB to cool down and heat gun the next chip.

you do not need to remove any board (other than android ones, as you need to open the projecto9r) but this one slots in, with no cables. so should be easy to test out if its fixed
[Android Software Development] spocky12:
I've just updated the 2nd post with the full firmware for zodiac, thanks auldthief :good:

Thanks for your feedback ! Unfortunately, I can't reproduce these bugs on my fengmi 4k :

1- Theoretically my code shouldn't interfere with any of the stock behavior. In practice, I can still long press the menu button as before, to access the 3d/keystone menu.

2- Nothing breaks here except the keyboad which displays big letters. Anyways, it's recommended to reboot the device when you change this parameter (I'll add a message in the next version).

This can't be fixed. The config files show that vp9 is supported up to 1280x1280, changing them won't improve the decoding speed.
[Android Software Development] Kaudii:
Hello, is it normal that I can't install anything from Google Play, every illness ends in error. Installations with Aptoide Tv work correctly.

Wysłane z mojego MI 8 Explorer Edition przy użyciu Tapatalka
[Android Software Development] wire_less:
1. You are right tried it just now and it works like you say so strike this off as non-issue

2. Didn't try this one again today but the reboot prompt sounds like a good idea to start fresh.

---------- Post added at 11:42 PM ---------- Previous post was at 11:36 PM ----------

So you think this is a SOC limitation? And why is DRM info app showing that Widevine L1 is supported?

Have to check though if it is because I did the magick plugin..
[Android Software Development] spocky12:
First post explains it all : you need to enable the accessibility service from my tools.
[Android Software Development] Kaudii:
Thanks, I saw it but in version 3.0 I didn't find this fix

Edit:

Sorry for the confusion, did not I read, Version 3.0 is a little different, I read, I applied, installations and upgrades are working properly.

Wysłane z mojego MI 8 Explorer Edition przy użyciu Tapatalka
[Android Software Development] gregor1230:
[MENTION=848496]spocky12[/MENTION]

Hi, I have some question about:

"fix : fixed compatiblity with Netflix (not the Tv version, unfortunately, but the interface is totally usable). Due to missing DRM support, resolution is limited to SD. Users with a previous version of my Tools installed, please uninstall/reinstall the custom props overrides to apply the fix."

Are you working to add compatibility with tv version of netflix? Is it possible to see one day resolution FHD on netflix directly from Xiaomi laser projector?
[Android Software Development] dj666jp:
Thanks you spocky12 for the new version and the awesome job you're doing.

I'm experiencing the same difficulties with their helpdesk, they are playing a dumb game. I'll try to go to the paypal ticket option, as I received my projector since only a month.

I gave a negative feedback on the projector they sent me, but I don't think they will publish it :D.

For me too, it's not an overheating issue. It seems we all have random issues due to what mmmalas described (PCB need reflowing).

I could video record an issue I never had before :

After all the white dots, white lines, no display, colours bug problems, here come the frozen split boot logo issue :

https://www.youtube.com/watch?v=o6ivoYlfBTs

I think many of us are waiting your photos if you're opening it first.

Finding and Fixing the issue seems difficult,

I thought that our problems was from faulty solders on DMD chip,

but Ti DMD chips seems to be mostly solderless, (maybe this one?) : http://www.ti.com/lit/ds/symlink/dlp470te.pdf

So if this PCB is crappy, don't we have to reflow the full PCB and not just one chip?

Aren't we all taking a risk by using the device while it's faulty?

From the Ti PCB Design requirement Datasheet for DMD here : http://www.ti.com/lit/an/dlpa080/dlpa080.pdf

I can read this type of warning :

"Do not allow power to be applied to the DMD when (...) signal pins are not being driven",

"it is critical to prevent (...) intermittent power connections (...) because irreversible DMD micromirror array damage (...) can occur"
[Android Software Development] mmmalas:
It cant be the dmd chip. Dmd is just bunch of tiny mirrors that can be switched on and off based on input signals, I had and repaired repaired my fair share of Sony 4k projectors (those were LCOS) so different way of operating.

My point still that this is reflowing issue since it does not work well on cold. And work flawlessly when warm/ hot.

It's not the whole pcb you want to reflow. It's one of the four chips on it.
[Android Software Development] tihsamikah:
yep thats the same with me :)

I used their normal support forum, and they were just asking me to chase the supplier for a "brush" system (what ever that is), and I said how is that supposed to help a hardware issue.

but - soon as I contacted them through paypal - bam - a (very partial) refund offer, or an offer to return to hong kong.

for me - I'm unfortunately busy this weekend and I won't have a chance to look at the projector.

EDIT - and I just accepted the partial refund on paypay - $697 AUD and I get to keep the projector.

while I'm annoyed, I don't have time to muck around returning the item, etc...

I'm keeping my eye out for another short throw projector -

looking at the Optoma Technology CinemaX P1 HDR XPR 4K UHD

maybe if I get this working - it can go in my "man cave" lol
[Android Software Development] Homar80:
But maybe that is a chip problems it could be a faulty series off that chips. Because some people get this problems after half year and others after one month.
[Android Software Development] mmmalas:
I have no idea why you are arguing about it. Do you have hand on experience repairing projectors?

Or electronics repair.

Can you explain how faulty chip is faulty consistantly at low temp, but works flawlessly once temp goes above certain point?

What you are doing here is confusing the public with baseless assumptions

I am not trying to be harsh. But remember that whatever you write. You need to owe to it down the line. when others reading your post.

you are entitled to your opinion, but please mark it as such

Problem showing months down the line prove the opposite of what you are saying.

Faulty is faulty from day 1.

Down the line means expand and shrink with usage

There are multiple indicators that point to this.
[Android Software Development] Mega Maniac:
Sorry if I'm being dumb here, but I cannot figure out how to enable to "accessibility service"

When I go into accessibility services there are 4 main options: "Talkback", "Select to Speak", "Switch Access", "Mi ProjecTivy tools".

There are then a election of other options, but nothing that seems to relate to Google Play... Am I missing something?

---------- Post added at 10:15 PM ---------- Previous post was at 10:15 PM ----------

Sorry if I'm being dumb here, but I cannot figure out how to enable to "accessibility service"

When I go into accessibility services there are 4 main options: "Talkback", "Select to Speak", "Switch Access", "Mi ProjecTivy tools".

There are then a election of other options, but nothing that seems to relate to Google Play... Am I missing something?
[Android Software Development] spocky12:
I've updated the Edid info (for both rainman and batman) in the second post, this time analyzed with a recent software (the old tool on my raspberry didn't work so well :eek:).

I'm not working towards a compatibility with tv version. It's something that's been specifically disabled by Netflix, and seeing how the previous hacks in the past don't work anymore, my time would probably be more useful on another subject seeing that :

- the currently working version, although being less intuitive, can be fully used with the remote control (navigation as well as play/pause/ff/rw). The only thing that can't be done with the remote control is switching profile.

- there is almost no hope of getting FHD on our device (it lacks widevine L1 and this kind of DRM can't just be added by dropping a few files on the system)

For more clarity (or not :p) the Accessibility Service has been renamed to the name of the app : "Mi ProjecTivy tools".
[Android Software Development] Casey.Bryson@gmail.com:
Love the 4K resolution and the ability to choose Noise Reduction or De-Interlacing with the 3.0 (among other things). Thanks Mickael! Looking forward to the next great update!
[Android Software Development] Mega Maniac:
That explains it! I assumed it was a Xiaomi tool due to the 'Mi' and when it asked for a load of permissions I figured I didn't want that sneaky Chinese govt to control my projector :p

I'm sure you will, but updating the OP with this info would save confused souls like myself :)
[Android Software Development] dj666jp:
sorry, some questions

Sorry, I didn't express my thoughts well enough: Is there a chance that more than one chip need reflowing?

Until now I had this troubles, please can you check and give me your opinion :

https://www.youtube.com/watch?v=PltQdSVfFOQ

https://www.youtube.com/watch?v=kEkHqmWErf8

https://www.youtube.com/watch?v=o6ivoYlfBTs

https://www.youtube.com/watch?v=kLIouGnjczc

I found a local company to do the job, but I will have to diagnose it by myself.

Your previous post are really valuable if I decide to go that way, thanks.

They proposed me a partial refund of 350euros or to send it back via Spain, if the device can't be fixed, they propose to send a refurbished one.

Let us know when you will open it.
[Android Software Development] mmmalas:
Those are different problems, the second video ,shifting colors are to do with the color wheel. Worse case it's inside the closed system, Best case it's electronics fault with dmd timing.

Everything else can be done with reflow

The best way to diagnose, is to use heat gun or hair dryer, heat individual chip out of the 4 on top (I will start with iChip or Thine, as it's the likely candidate)

Once heated for minutes, turn on (after slotting the android board back) if it works right away, then that's your chip
[Android Software Development] jricgar:
Hello all,

I'm one of the person with a faulty xiaomi 4k projector, mainly no image after starting (about 5-7min right now). I have just received a call from the projector technical service where I took it a week ago. They told me that the problem is related with a "PCD Video" component, whatever it is, and they dont have this spare part. Obv I cannot confirm that this diagnosis is correct. The only one thing I can confirm is I'm really ****ed :frown:

Regards.
[Android Software Development] mmmalas:
I think you mean PCB not PCD.

thier "diagnosis" is too generic. in fact, I would not call it a diagnosis.

point them to this thread, I can assiss them, on the condition that they publish their findings for others to benefit.
[Android Software Development] jricgar:
I will try to do it when I go to pick up the projector later this week. Thank you [MENTION=271862]mmmalas[/MENTION].

Also I will try to find other projector technical services here in Spain willing to check my projector.

Regards.
[Android Software Development] guthl:
Frozen launcher

Hi, thanks a lot for the tutorial.

I froze the launcher but did not get to install a new one and restarted the Wemax.

I'm now stuck on WEMAX MIUI basic image and cannot do anything.

What can I do to reinstall from scratch?
[Android Software Development] spocky12:
Hi,

Did you use an old version of the tools? This problem should be fixed with the 3.0 release as it's declared as a launcher itself.

To fix your issue, just reboot too stock recovery and use the factory reset option (latest one of I remember well).

Or follow the tutorial to flash the full rainman firmware.
[Android Software Development] tihsamikah:
OK - so I've gotten a chance to pull open the projector - what a compete bastard that was :D

weird thing - now I've pulled it open, I thought I would turn it on - and it bloody worked straight away???

It has not done that in ages......

I've let it go for a bit, but no issues so far?

The only thing I did was push the DLP black cable in a bit further......

https://youtu.be/lNDlfVQDppg
[Android Software Development] tihsamikah:
Sorry one thing I also looked at, is the heatsink here, is affixed by nothing but tape, and I pulled it off and no thermal paste to hold it down.

I removed this too, and replaced it.

I wonder - if this became dislodged, and was shorting something on the PCB??
[Android Software Development] tihsamikah:
and things are getting weirder....

I put the unit back together - and bam - stopped working, and did the white pixels as per my first video.

I've undone it again, and its working normally.

I'll keep investigating...

---------- Post added at 01:32 AM ---------- Previous post was at 01:11 AM ----------

sorry and more -

So - I pulled off the cover, and put it on lightly (without screwing it back in) and I booted up, and all was working.

I then pressed down on the left hand side (side with the wifi antennae) , and it corrupted.

turned it off - loosened the cover - and back on, and it working fine.

so - I've put the cover back on lightly (sealed it so it looks correct) and haven't screwed it together.

given I'm not going to move the projector, I don't have an issue.

So - for me this is working fine now.

perhaps those others with these symptoms can try and loosen the cover?
[Android Software Development] nyunyu:
Hi [MENTION=848496]spocky12[/MENTION], to get the netflix compatibility should I just reinstall the app or do I need to start fresh again?
[Android Software Development] mmmalas:
first of all BE CAREFULL do not touch the projector while on with bare hands, it is live power, and you do not want to mess with that

also thanks for the video,

few questions:

1- were you seeing the white dots on your projector issue.

2- did you have long start up time.

3- both problems caused by pressure on wifi antenna? can you point out where is this part so I could work out, how is the problem happened?

it could be short circuit or pressure bow something, and cause a lack of contact with the connector but it expands with heat
[Android Software Development] Janger88:
Im really impressed with your hard work - especially the input lag has decreased so much and so much thanks!

I have the rainmain 1080p version and installed the latest magistk 20.0 and 3.0 App and even with dynamic colors and contrast on.. I get 42-75ms input lag which is pretty damn good and enough to casually play ... image looks even cleaner/sharper now with noise reduction/deinterlacing off.

thx!
[Android Software Development] aepg10:
[/COLOR]

Hello,

Maybe the pressure at any point on the video PCB or case cover is enough to make contact on a bad weld chip ...

I think He has the same problem described before on this forum, first, long time to start on coold start and then, white dot points.

You talked with other user (from Australia) that the problem was a bad weld on a chip from the PCB video. The problem now is that without touch it, it is working fine, so we should to reproduce the problem with the projector open in order to look at the bad chip by touching or heating it.

Please, correct me if I'm wrong.

PD: I have the same issue with my xiomi 4k projector.
[Android Software Development] mmmalas:
in this case, it looks like just opening the projector solved the problem.

there might not be any need for further work. but we have only single sample for now
[Android Software Development] aepg10:
Thanks for your reply. We are two users from spain, one of them has send the projector to a thechnical service but it don´t solve the problem.

Maybe He can try with his projector.

I am waiting to open it because it is possible for me send it to china.

Do you think that only opening it or rest presure from the case will be enaouhg or it can be only a temporal solution?

---------- Post added at 01:29 PM ---------- Previous post was at 01:15 PM ----------

Please, I will be appreciated if you can inform about your solution. If the problem come back or not with time or with the start cycles.
[Android Software Development] spocky12:
Thank you for sharing your discoveries ! Hopefully this will be enough to fix most bad devices.

With latest tools version, just uninstall and reinstall "custom build props".

Thanks for your positive feedback !
[Android Software Development] bloo10:
Is there any option to turn on the PJ without the remote ???

i need some alternative option for the remote, all the remote i check can turn off the pj but not turning on

please help

thank you
[Android Software Development] mmmalas:
I would recommend going for a solution, if its bowing issue, otherwise it will only get worse. And might reach the point of no return.

My advice is to sort the issue as quickly as possible.
[Android Software Development] nyunyu:
Just curious, is there a way to use netflix tv app on the projector? Or using the phone version without having to use a mouse?