Rear projector tv problems8/12/2023 I'm thinking I will either keep it as a spare and deal with the blue fog or be patient in the hopes of locating someone who might have the parts I am looking for to fix this baby up. While it sounds practical to stop working on the TV and buy a newer model for time and expense, I still want to try and fix it for my own knowledge (first time doing this repair) and because I really like this old TV-I've taken good care of it for 10+ years, only had one bulb replacement in that time, and it feels like such a waste to scrap it and throw it out curbside. Any idea how long an LED TV like this is "projected" (lol) to last? I checked and saw some good Black Friday/Cyber Monday deals on these Class 4K Ultra HD 2160P LED TVs in the $300 price range on sale. Gophert - I didn't know the new 55" with those specs were so affordable I spent $900 at Circuit City (RIP) on my Hitachi back in the day. I disassembled most of the light engine and I did not find a color wheel inside, if that helps. The other two filters (for the red and green LCD panels) look fine. I disassembled the unit further and found a blob on the blue LCD panel when held up to the light and major burn in on a "red" colored polarizing filter in front of the blue panel. Below is my optical block:Įach LCD panel has a different colored polarizing glass filter contained in a metal frame in front. Inside the unit are 3 colored red, green, and blue LCD panels. I was always under the impression my TV uses DLP-if the blue panel actually uses highly specialized micromirror DLP technology, I would imagine rebuilding it would be out of the question/impractical. Rjenkinsgb - I'm still not sure whether my Hitachi TV uses DLP or LCD technology. I'll reply to each individually and then offer some general updates and questions. I have tried writing Lampdeng, a company in China that someone else had success with, but I haven't heard back from them. It seems like this issue is something that could almost be repaired inexpensively with 3-D filter glasses cut to size from the movie theater (but with high heat resistant glass, not plastic lenses) rather than replace the whole (now obsolete) light engine.ĭoes anyone know of any suppliers, companies, or individuals who could supply or fix the LCD panel glass and cut me some blue polarizer glass to fit the frame of the old, burnt blue polarizing filter? I can take it out and measure it. I will post pictures when I get to that part. I currently have my Hitachi light engine disassembled (actual picture below), but I have to figure out how to get the printed circuit board off and get underneath it to take the LCD panels out (called the optical block?) and the polarizing filters. Since I can't find any spare junk projectors, and the parts aren't being manufactured any longer, might you have any idea if a burnt blue LCD panel in this projector television can be opened and repaired or rebuilt myself? I don't have an exact picture of the LCD panel from my Hitachi unit, but here is a similar example from an Epson TV unit from the web: I appreciate your taking the time to respond. I didn't know about the display technology still being viable for other uses. Here are two pictures of the TV and the blue dots/fog: Again, what color filter is causing the blue fog (I haven't opened the TV yet), who sells the replacement filters directly to the public, and do you have instructions on a first time repair attempt? I would be most appreciative of any help you can offer regarding this blue fog issue. Do you know which color polarizing filter I need that would correct the blue dots/blue fog issue? I can't afford a new light engine given what I hear they cost ($500+), but the filter (~$30?) could be a good workaround. My research says that the blue dots might be a light engine issue/optical block problem, but there is a way to change out one (or more) of the colored polarizing filters inside the unit inexpensively. The unit is out of warranty-about 12 years old. The issue is there is a lot of blue fog and a constellation of blue dots on the screen that is distracting to look at. On the back of my TV are the following numbers: The TV is from 2006 and has served well to date, except for the blue dots and fog issue. I am confident in my repair abilities and just need the part and instructions on the install. Any instructional videos would also be helpful as well as tips for a first time DIY repair. I am looking for help with polarizing filter part(s) to fix my Hitachi 50" rear projection TV and your assistance with a source who sells polarizing filters (glass rectangles, I presume) to the public.
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