Hi Guys and Gals,
I have a question and I am hoping someone with some electrical/software knowledge can chime in and help me out.
I have an RK3066 based android Mercedes Double din unit and the RED LED from the RGB will not work. Blue and Green work fine it is only Red that does not work.
It used to work fine and then all of a sudden I enter the car one day and it's green, (I use a green and red mix to create orange which is the default Mercedes color)
Yesterday it magicall started working again after having not worked for 2 weeks and today it is gone again.
Green slider works
Blue slider works
Red slider makes no color changes and if green and blue are all the way down and red is all the way up the lights are off.
Can this be a resistor or it it software based, I know the kernel can control the LEDs and so on but I am leaning towards hardware related. Maybe a broken SMD resistor these Chinese units are so poorly designed.
Anyways if anyone has some info, it will be greatly appreciated.
God Bless
Same thing here....blue and green work but not red. Stopped working...came back...then went out again. It started after updating in march. I had an older version and wanted the standby timer. RK3066 800x480 KLD unit. I've tried reverting the mcu. Switched to the newest mcu. Reflashed rom. Which actually controls the rgb's?
So far from what I can tell is that the GPIO pin goes to the led resistor then to the led itself and I believe it is controlled via a voltage difference. for example 3v red 3.15 blue, 3.25 green (not actual figures)
What is confusing is that it came back for me then went out again, the dash is extremely hard to pull apart for the Mercedes, not to mention I have a full blown system in here and will have to remove quite a bit of product before getting to the headunit. I was hoping someone with higher software and hardware knowledge would chime in, but it seems like we are on our own. A lot of people on these boards will says "open it and try on your own" I am not sure but I believe that it is 1 resistor for all three colors, unless it is 3 individul leds which would require 3 resistors.
Mine also went out in March (I made no Rom or MCU changes prior to it going out) which is odd then it came back in april, can some software based date cause it to not functions? or can it be that just the red led is failing (defective).
I doubt that it is a resistor since the other two colors work fine and from what i suspect it should be 1 led (RGB) and 1 resistor for the (RGB) led.
Hopefully someone will let us know if there is a remote possiblity that it could be software based, if I was 100% certain that it is hardware based I will and would have already pulled out the unit.
Sounds to me like an intermittent hardware issue - a bad connection somewhere. More likely to be on a connector than a bad PC board trace or cold solder joint.
mike.s said:
Sounds to me like an intermittent hardware issue - a bad connection somewhere. More likely to be on a connector than a bad PC board trace or cold solder joint.
Click to expand...
Click to collapse
Do you know if the unit is individual LEDs or is it one rgb led
If it is one led then it should have 1 resistor per led and in which case none of the colors should work.
Could it possibly be kernel based or the rk3088 board/chip itself?
I will pull mine out tuesday night and take a look at the leds to see what the are and get some pics. I ordered a rk3188 SoM and will also be changing over to that rom.
Awesome, please keep me posted. I'm gonna try a few things software wise.
Well I opened it up and almost didn't get it working again. The rgb leds have four legs ground and power for each of the color. My camera sucks so no pics but when changing colors in the elements screen if I select red the blue leds light up. Selecting green does green. Selecting blue goes dark. So I'm really thinking that it's software related.
dazedfive said:
Well I opened it up and almost didn't get it working again. The rgb leds have four legs ground and power for each of the color. My camera sucks so no pics but when changing colors in the elements screen if I select red the blue leds light up. Selecting green does green. Selecting blue goes dark. So I'm really thinking that it's software related.
Click to expand...
Click to collapse
That happens if you have MCU 2.55 with the sound enhancement MCU version 2.22 works correctly.
if your headunit is still open, is there anyway you can send me the picture of the board and resistors, even if it a horrible picture, its still better than nothing
thanks
Sorry didn't save them. There weren't resistors next to each led but there was a group of them on the other side of each board so a bit of tracing would need to be done to track each one down. For the mcu my unit is KLD and i've tried every version listed here http://forum.xda-developers.com/showpost.php?p=61291848&postcount=14139 and none changed the way the elements act
Related
Since I knew everyone would think I lost my mind, I verified this for weeks before posting it...so here it goes!
When I charge the device at work (with the power on), it sits on my desk about 16 inches under my overhead cabinet that has fluorescent lights underneath. The lights somehow triggers screen actions on my HD2! It's the strangest thing I've ever seen! After about 30 seconds, the device looks like a ghost is randomly tapping the screen, randomly starting programs!
This NEVER EVER happens in any other condition--outside under sunlight or while the device is on any other surface where the fluorescent light is higher up, like on the ceiling. I have no problems with using the device otherwise.
It's just strange and I'm wondering if anyone else has ever seen this...
hmm interesting.
Might there be power running up inside the wall near the phone too? PC and monitior around it?
could be patches of field building up just enough to fool the capacitive screen, or maybe exciting the grease on teh screen or some such.
Course there has been a lot of talk about ghost taps, is it really only ever happening there?
Could be you need to change the starter plug in the fluorescent, if its a standard strip, they can hold quite a charge, and if its on its way out it could be losing charge to the air.
Especially when you look at how many electrical items we have on/near our desks, easy to build up a standing charge.
samsamuel said:
hmm interesting...Could be you need to change the starter plug in the fluorescent, if its a standard strip, they can hold quite a charge...QUOTE]
Someone also mentioned the fact that the flicker on my fluorescent desk lamp could be the cause. I saw a video where someone was able to "tap" their capacitive screen using beams of light, lasers, etc.
Click to expand...
Click to collapse
My question....
Are the LED's under the capacitive buttons controlled by individual drivers or is it one driver for all 4 LED's. Also is the driver(s) replaced when I flash a new ROM and Kernel?
My reason.....
I got a replacement Rezound, and the phone is flawless other than 1 LED. All the buttons are nice, bright, and red, but the home button is barely lit up. Very dim. When I use the dim LED script the home button basically turns off.
I don't wanna deal with getting another that may have real problem, when this is just more of an annoyance. My Dad is the boss at a factory that builds computer electronics for all kind of crazy stuff, and said he could have someone replace them properly. I've ordered red 0603 SMD LED's to replace them all. My only concern is he mentioned it could be a bad driver for that LED, and make all the replacing pointless. So if they are all controlled by a single driver it would be a bad LED.
Or do I just not know what the hell I'm talking about?
EDIT: This should be in Q&A. Mods please move.
Honestly, I don't know but I suspect it is just an individual LED. Not on a computer right now but there is a thread on this forum with high res pics showing the LED color mod that might help make the process easier.
Sent from my ADR6425LVW using Tapatalk 2
I did see that thread. That's where I got the red LED idea, but his problem was pink buttons not really a possible burn out, or other issue. I could deal with them being pink if they lit properly.
probably a mis-aligned attachment on the pcb, or a bad led altogether.. if you want to take it apart you can probably replace the individual led, but you'll need some soldering expertise.
That's also what he thought bad connection. They have plenty of experience at his work, and all the right equipment. So I'm gonna send it there. I wanted to make sure there wasn't an individual driver for just that led before I wasted his employee or companies time.
Yes, sound like bad hardware for sure...good luck!
hi,
my S3 and my colleagues's S3, when we receive sms or missed calls,
the LEDs does not have consistency,
mine is white but there are some background color like slightly orange and yellow but my colleagues is jus pure white
then for orange, mine always shows like a circle with 3 quadrants of different colors but my colleagues only show 1 color,
is my set fault or this is because of the way the phone displays color but if it is so, then both phones would be showing same instead of distinct difference, right ?
can anyone share their experience ?
v1hypersg said:
hi,
my S3 and my colleagues's S3, when we receive sms or missed calls,
the LEDs does not have consistency,
mine is white but there are some background color like slightly orange and yellow but my colleagues is jus pure white
then for orange, mine always shows like a circle with 3 quadrants of different colors but my colleagues only show 1 color,
is my set fault or this is because of the way the phone displays color but if it is so, then both phones would be showing same instead of distinct difference, right ?
can anyone share their experience ?
Click to expand...
Click to collapse
You can download lightflow from the marker to test the LED. With that app you can test a variety of colours.
Afaik there is a revision 1 and revision 2 of the i9300 (international) around with revision-2 only having slight design changes to prevent some issues.
The phone has several distinct LED's which, when mixed together, display the color of your choice. However several colors which are not native (meaning which are not directly displayed by a single LED) mixing together doesn't really give the intended result but a confusing "mess" of colors.
My best guess is that, if your friend's S3 really only shows a single color-point, he got a revision where they either moved the LED's very close together or replaced them by multi-color LED's.
d4fseeker said:
Afaik there is a revision 1 and revision 2 of the i9300 (international) around with revision-2 only having slight design changes to prevent some issues.
The phone has several distinct LED's which, when mixed together, display the color of your choice. However several colors which are not native (meaning which are not directly displayed by a single LED) mixing together doesn't really give the intended result but a confusing "mess" of colors.
My best guess is that, if your friend's S3 really only shows a single color-point, he got a revision where they either moved the LED's very close together or replaced them by multi-color LED's.
Click to expand...
Click to collapse
Really???? And how can you tell which revision you have?
Hello.
I've been using my I9305 a while now with a 4.4 OMNIROM.
Everything was fine until I let my girlfriend borrow it to use the gps for a trip.
She returned it and I noticed the colors are strange. All the blacks went greyish, and gradient colors werent smooth but showed artifacts.
I thought it was a setting but after factory resetting/wiping everything/changing rom the phone still has strange colors, even the green boot android icon seems abit light.
Here are some screenshots showing the same pictures on my phone (the samsung) and a functional HTC. You can see the artifacts and the distorted blacks.
Code:
[img]imgur.com/BbUKzzN.jpg[/img]
[img]imgur.com/sAIiDnB.jpg[/img]
Is it possible she dropped it and damaged the screen/matrix?
Is it possible that some connector to the lcd/digitizer got slightly disconnected? (maybe i should try disassambling)
She used several apps (tomtom, navigon) that have nightmode (screen altering modes), maybe its stuck or damaged.
Please help
cyborgsattack said:
Hello.
I've been using my I9305 a while now with a 4.4 OMNIROM.
Everything was fine until I let my girlfriend borrow it to use the gps for a trip.
She returned it and I noticed the colors are strange. All the blacks went greyish, and gradient colors werent smooth but showed artifacts.
I thought it was a setting but after factory resetting/wiping everything/changing rom the phone still has strange colors, even the green boot android icon seems abit light.
Here are some screenshots showing the same pictures on my phone (the samsung) and a functional HTC. You can see the artifacts and the distorted blacks.
Code:
[img]imgur.com/BbUKzzN.jpg[/img]
[img]imgur.com/sAIiDnB.jpg[/img]
Is it possible she dropped it and damaged the screen/matrix?
Is it possible that some connector to the lcd/digitizer got slightly disconnected? (maybe i should try disassambling)
She used several apps (tomtom, navigon) that have nightmode (screen altering modes), maybe its stuck or damaged.
Please help
Click to expand...
Click to collapse
Seems like a hardware problem to me. I would try and watch lcd replacement videos to see if the screen is correctly plugged to the motherboard.
It's probably already known by everyone that this phone packs an RG notification light (damn you, ZTE!) What's more, blinking seems to be fixed to solid and slow blinking, and it can only display RED , ORANGE and GREEN.
But, at least on ResurrectionRemix, there seems to be a way to turn on the two LEDs that we actually have with the console, and with a desired brightness:
su
echo 255 >/sys/class/leds/red/brightness
255 is the maximum brightness, but it ranges from 0 to 255.
Also, we can do a very nice shade of yellow using:
echo 255 >/sys/class/leds/green/brightness
echo 64 >/sys/class/leds/red/brightness
There are also a bunch of other parameters inside, but brightness is the only one I tested so far. I think we could use this to control the LEDs via a root-enabled app like LightFlow. Is it possible? It would improve a lot the LED quality.
Yellow would be nice. Maybe if you contact the Appflow dev he could make it work. However i'm not sure I want to install an app just to add 1 color
XblackdemonX said:
Yellow would be nice. Maybe if you contact the Appflow dev he could make it work. However i'm not sure I want to install an app just to add 1 color
Click to expand...
Click to collapse
not just colors, in theory... Blinking speed is theoretically changeable, but it is somehow hard-coded and only blinks slowly for some reason. I'm not even sure if it can be just solid when triggered by a notification
There are a bunch of files inside the red and green led folders, and I guess they are what controls the LEDs flashing speed and all. I say "guess" because maybe they are simply ignored and the blinking speed is hard-coded. But whatever the case is, it seems possible to at least turn the LEDs on via shell scripts
Choose an username... said:
not just colors, in theory... Blinking speed is theoretically changeable, but it is somehow hard-coded and only blinks slowly for some reason. I'm not even sure if it can be just solid when triggered by a notification
There are a bunch of files inside the red and blue led folders, and I guess they are what controls the LEDs flashing speed and all. I say "guess" because maybe they are simply ignored and the blinking speed is hard-coded. But whatever the case is, it seems possible to at least turn the LEDs on via shell scripts
Click to expand...
Click to collapse
Files inside the folder:
I found it extremely disappointing that ZTE gave us only RG lights on the non-Chinese version (I heard the Chinese version has RGB?). For diodes so cheap, I am only led to believe it must have been a manufacturing error on their part. Don't get me wrong, we get more than enough for the price and specs of this beast of a device, but how hard could it be to get RGB LEDs on this device? I really miss multicolour notification lights. This green-red-orange thing gets boring rather quickly.
KwesiJnr said:
I found it extremely disappointing that ZTE gave us only RG lights on the non-Chinese version (I heard the Chinese version has RGB?). For diodes so cheap, I am only led to believe it must have been a manufacturing error on their part. Don't get me wrong, we get more than enough for the price and specs of this beast of a device, but how hard could it be to get RGB LEDs on this device? I really miss multicolour notification lights. This green-red-orange thing gets boring rather quickly.
Click to expand...
Click to collapse
I really miss the RGB led too. I never know when my notification is important or not.
XblackdemonX said:
I really miss the RGB led too. I never know when my notification is important or not.
Click to expand...
Click to collapse
Yeah, bro. Coming from a One M8 with the same RG lights (used for about 2 years, previously a Nexus 5 which was RGB), you would understand