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post #2371 of 2390 Old 04-17-2016, 07:37 AM
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Quote:
Originally Posted by headcase151 View Post
The picture in post #2369 ,looks like my PA75U. The picture turned Cyan. I could turn it off, then back on. Then it would be all right, for 10 minutes. When I took it apart, it looked like that. When I inspected it. The top cover cover was warped, so the green connector was getting hot. I don`t know if the board was replaced it would work.
So you got the same problem as me!, if you find something about it, way to solve or similar please tell me.
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post #2372 of 2390 Old 06-22-2016, 10:06 PM
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language settings error

Hi,

I own a LG PA70G LED Projector.
So far, everything seemed to be ok till recently I figured out a problem when playing movies.
There is a problem with subtitle encoding in Greek characters. Every time i play a movie with Greek subtitles this is shown in Korean / Chinese characters.
I figured out that the problem is that in menu the language option is turned off/greyed.

I really dont know why this happened now.I would appreciate any suggestion to my problem.
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post #2373 of 2390 Old 06-23-2016, 01:25 PM
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Quote:
Originally Posted by zoumbro View Post
Hi,

I own a LG PA70G LED Projector.
So far, everything seemed to be ok till recently I figured out a problem when playing movies.
There is a problem with subtitle encoding in Greek characters. Every time i play a movie with Greek subtitles this is shown in Korean / Chinese characters.
I figured out that the problem is that in menu the language option is turned off/greyed.

I really dont know why this happened now.I would appreciate any suggestion to my problem.
Try change projector language to Polish or something else before you run movie. Different languages use different encoding for subtitles.
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post #2374 of 2390 Old 06-28-2016, 09:28 PM
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Quote:
Originally Posted by Honzik1 View Post
Try change projector language to Polish or something else before you run movie. Different languages use different encoding for subtitles.
Hmm,, If you mean change the language menu I have only English and Korean option available.
Also is not possible to change subtitle language before I run the movie. Is it possible?
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post #2375 of 2390 Old 08-09-2016, 11:11 AM
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I am new here, and this seemed the place to post a problem.

I have an almost 4-year-old LG PA70G that has seen roughly just 100 hours of use. It is always stored in its original box, inside its nylon bag, and the only handling is carrying it from home to my workplace. It has never been roughly handled or dropped; the lens is just fine.

Last prior use was 6 weeks ago for a presentation without problem. Looked and sounded great. Afterwards it lay dormant until today when I had to use it again for another presentation.

But upon start-up today, the projection was speckled with sandy dots, typically more dense in white areas. (See attached photos.) This isn't the projection surface, it isn't the lens. I could watch a video from a UBS stick and the video moved normally and the sound was just fine; all menus work just fine, too. But the image is always speckled with dotty, sandy bits. (Via HDMI my laptop's screen image was also speckled.) The LG logo is disrupted; it says "No Signal" underneath, but the signal is not the problem — remember, any video motion and sound worked fine.

I turned the device on and off a number of times, and reconnected the USB stick or HDMI cable a few times, too. No change. The image is always speckled.

Any thoughts? Could some internal software need reinstallation? Could a faulty hardware circuit cause this? Any advice would be appreciated. This device is out of warranty, but for a LCD projector advertised with a 30,000-hour illumination lifespan, it shouldn't have such a problem at 100 hours.

Thank you.
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post #2376 of 2390 Old 09-21-2016, 02:01 AM
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firmware

Hi guys,

I have 2 related questions:

How can you reinstall the firmware to the projector? Something gone wrong to the menu after a forced electric shutdown (-yes it can happen).

Does anybody knows if there is available any firmware update to it?
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post #2377 of 2390 Old 11-04-2016, 11:25 AM
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Projector lamp led lg pa70g

Hello friends, I have the projector lg pa70g, and I'm looking for the led lamp for this projector. Someone forum know the make and model of the lamp, and a shop to buy. I live in Brazil, if you can help me I thank you. Translated by google.
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post #2378 of 2390 Old 11-11-2016, 09:44 AM
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Hello friends,

I am new to this forum , I own a 2 year old LG PA72G projector, I never had any problem with this projector before, But suddenly the screen changed to red color , and the Blue color become purple , first I though may be some loose contact or HDMI cable problem , so I tested without any input source , But the problem still remains there , RED SCREEN picture is very reddish , Friends pls help me .......
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post #2379 of 2390 Old 11-11-2016, 03:05 PM
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Quote:
Originally Posted by Dosth View Post
Hello friends,

I am new to this forum , I own a 2 year old LG PA72G projector, I never had any problem with this projector before, But suddenly the screen changed to red color , and the Blue color become purple , first I though may be some loose contact or HDMI cable problem , so I tested without any input source , But the problem still remains there , RED SCREEN picture is very reddish , Friends pls help me .......
Hi,

That image looks really bad, I think it can be some problem with the green LED (because the white looks like a weird magenta) and maybe blue LED, or LED driver/power management, it could also be the video DSP/video front end. I think you have to send it to a repair center, if you don't have much experience with this kind of electronics, like me.
If you try to display a pure blue or green screen what happens? Try the blank options.

Regards,
Danny

Last edited by danny92; 11-11-2016 at 03:14 PM.
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post #2380 of 2390 Old 11-12-2016, 12:45 AM
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Quote:
Originally Posted by danny92 View Post
Hi,

That image looks really bad, I think it can be some problem with the green LED (because the white looks like a weird magenta) and maybe blue LED, or LED driver/power management, it could also be the video DSP/video front end. I think you have to send it to a repair center, if you don't have much experience with this kind of electronics, like me.
If you try to display a pure blue or green screen what happens? Try the blank options.

Regards,
Danny
Hi Danny thx very much for you reply , I think you are rite , because RED AND blue image looks good, but not the same with Green , so I called up LG customer service center , then I explained the problem with the technician , he said that need to replace the DMD CHIP , and its very expensive 154 $ and my projector already out of warranty period , LG LIFE GOOD But now LB " LIFE BAD "

Thx,
Dosth.
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post #2381 of 2390 Old 11-12-2016, 09:10 AM
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Hi,

The DMD chip doesn't have nothing to do about the color, they said the problem is the DMD chip? What???
This component makes the image, not the color, it's a bit like an LCD, but instead it's a reflective microdisplay that works with tiny micromirrors (brigth pixel - mirror tilted to reflect light to the lens, dark pixel - mirror tilted to reflect light to the dump, greysclase - mirror fast switching), it can create image with red, green and blue components displayed sequentially (the LED driver/controller does that job), the color is created by the LEDs with three different wavelengths (red~640 nm, green~520 nm and blue~460 nm), in this case (LG PA70G), in lamp projectors, is the colorwheel. Trust me, the problem is not the DMD, the image looks perfect (apart from the strange tint), there aren't any dead pixels that I'm aware about (DMDs fail showing bright or dark pixels, like in LCD panels). It must be something else, ask for a second opinion. Making a comparison, It's like saying you're unable to draw and have a problem in your hand, because you don't have a green pencil, but you still have a red and a blue so you can draw, but not with the right colors.

DMD failure (does the image looks like this?):
https://www.google.pt/search?q=dmd+f...B_UbB6FdWhM%3A

If you want to know more about DMDs (DLP):
http://www.ti.com/product/dlp4501/datasheet
https://en.wikipedia.org/wiki/Digital_Light_Processing

LEDs for 0.45" WXGA DMD (Luminus Devices):
http://www.luminus.com/resource/crossreference.html#

The culprit may be the green LED or something similar to this I think:
http://www.ti.com/product/dlpa3000/datasheet

Regards,
Danny

Last edited by danny92; 11-12-2016 at 09:28 AM.
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post #2382 of 2390 Old 11-12-2016, 11:20 AM
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Quote:
Originally Posted by danny92 View Post
Hi,

The DMD chip doesn't have nothing to do about the color, they said the problem is the DMD chip? What???
This component makes the image, not the color, it's a bit like an LCD, but instead it's a reflective microdisplay that works with tiny micromirrors (brigth pixel - mirror tilted to reflect light to the lens, dark pixel - mirror tilted to reflect light to the dump, greysclase - mirror fast switching), it can create image with red, green and blue components displayed sequentially (the LED driver/controller does that job), the color is created by the LEDs with three different wavelengths (red~640 nm, green~520 nm and blue~460 nm), in this case (LG PA70G), in lamp projectors, is the colorwheel. Trust me, the problem is not the DMD, the image looks perfect (apart from the strange tint), there aren't any dead pixels that I'm aware about (DMDs fail showing bright or dark pixels, like in LCD panels). It must be something else, ask for a second opinion. Making a comparison, It's like saying you're unable to draw and have a problem in your hand, because you don't have a green pencil, but you still have a red and a blue so you can draw, but not with the right colors.



Regards,
Danny
Hi Danny

Thank You so much for your time and support, I sent a detailed mail to LG and explained about the DMD work short , once I get the reply from LG I wll get back to you.
Thanks again,

Dosth
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post #2383 of 2390 Old 11-13-2016, 08:08 PM
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Yr out of warranty - so pop it open, & check the "green" connector on the main circuit board (a good photo would be nice). If you are lucky, might just need to be re-seated with a spritz of DeOxit.

LG may have erred on the side of quiet (vs survivable thermal performance) on this generation of projector.
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post #2384 of 2390 Old 12-10-2016, 06:52 AM
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Quote:
Originally Posted by Honzik1 View Post
I have just made a little maintenance of the projector. I have opened projector and cleaned the dust. I oiled all 4 projector fans and in the service menu I played a little with fan control settings. Now everything is much quieter, I would say much more quieter! Especialy 1 fan is not making high tone anymore.

I have made few photos for you. As you can see there are 4 fans FAN1,2 and 4 are 40x40x20mm fans on the right side (on the opossite side than optics) These 3 fans are 7500 RPM. FAN3 is blow type of fan size of 51x51mm which is 4500 RPM.

Most important are FAN1 and FAN 3, because they cool down green LED which is the hotest.

LG have set strange fan control because at least important fan is FAN 4, which in brightest mode is set to about 5300 RPM which makes projector quite loud. Other fans are set about 3000-4000 RPM which seems be more silent.

So recomendations:
Open projector, unplug fans and speakers from motherboard, unscrew projector control panel (2 screws), unplug optics flat cable. Then unscrew 3 screws on the motherboard and 2 screews on VGA port, flip motherboard away and clean the dust inside. Then oil each FAN 1-4. Under the sticker of each fan, there is center to oil. The blow FAN3 you have to open is first before oiling it. I have use teflon oil to oil it.

In the IN-START service menu set Adaptive fan control to OFF, then you have to set fixed value for each fan. FAN 1 and 3 are most important, so I set about 3800RPM to FAN 1 and 3000RPM to FAN 3. I lowered FAN 4 a lot, because there is not much heat near this fan. In the brigthest mode, the green LED seems have temperature around 85 celsius. Well, LG site says that lifetime of projector is more than 30 000 also in bright mode and I think it is real, because heat damage capacitors but there are not many capacitors in this projector.

Here are some photos. There you can see also the debug port.

If you have any question, I will try to answer.

BTW: How loud is your PA70G projector?
.
how do i enter Service menu in the PA70G projector?
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post #2385 of 2390 Old 12-10-2016, 07:38 AM
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Quote:
Originally Posted by zoumbro View Post
how do i enter Service menu in the PA70G projector?
Buy some One For All remote control and follow these steps:
http://openlgtv.org.ru/wiki/index.ph..._menus_/_modes
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post #2386 of 2390 Old 03-07-2017, 06:16 AM
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hi Honzik,
can you enter PA70G projectors service menu with its own remote?
or is there an alternative way else than logitec harmony remote to enter that menu?
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post #2387 of 2390 Old 03-07-2017, 07:35 AM
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oops didnt see the link thanks a milion
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post #2388 of 2390 Old 03-15-2017, 02:56 AM
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hi honzik,
I entered login page of service menu but don't know how to enter the password. original remote has no numbers,
how did you pass that?
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post #2389 of 2390 Old 03-15-2017, 11:08 AM
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Quote:
Originally Posted by Rugrash View Post
Quote:Originally Posted by Honzik1 

Service menu LG PA70G
I did it!!
What you have to do?
1) You need a Logitech harmony remote control:
http://www.logitech.com/en-gb/support/universal-remotes
2) Follow these instructions:
http://harmonylghack.wikispaces.com/
3) Password is: 0413
I tried to follow this tutorial which is for LG TVs and it worked! I used Logitech Harmony 525 for this.
]


Nice!

I tried to point people in the right direction to access the service manual earlier in the thread.

Since I do not have the PA70G to try it on, there wasn't much I could do.

tataniko might know a way to change the LED settings. I think he changed them on his K330 to see if he could get lower power consumption with good results.
How do you enter password to access in-start menu, original remote has no digit keys and harmony works only to open password menu, i can't enter digits with it.

Last edited by Gürkan Gültekin; 03-15-2017 at 11:27 AM.
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post #2390 of 2390 Old 09-09-2017, 11:21 AM
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Information to buy a new DMD Chip.

Hello friends! I'm want to buy a new DMD chip for LG PA70G, and I unmounted my projector, and it has the following numbering 34Z383A, 1191-403BC on chip. I found to sell chips that have this second number equal (1191-403BC), but with the first number (34Z383A) different. Anyone know what each number means? I found a chip on Aliexpress to sell with the following numbers 3CZ281A - 1191-403BC. Does it serve to make the replacement?

Thank you in advance!
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