20 Most Recent Hitachi 50UX52B/53K 50" Rear Projection Television Questions & Answers

I believe it does have a tuner

Tube or ECU board are fried. Sorry.

Check these two - common faults - from hitachi database
Symptom: BLOWS E994
Cause: DEFECTIVE D604

Symptom: E994 KEEPS BLOWING
Cause: DEFECTIVE C701

The problem you have mentioned is caused due to loss of high-voltage. We have to perform a component level diagnosis to get to the source of the problem. Which begs the question how good are your electronics soldering skills? Do o you have a multimeter handy? Can you follow the schematics in a service manual(with my help ofcourse)

Projection TV sets are known to have two common problems. The first problem that is common to these sets is convergence failure. When this happens the TV will usually look 3D, Wavy/Distorted, etc. It may also shutdown and blink an error code.

The second common problem with Projection TV sets is dull video, halos around objects, white looking video, or red overpowers the screen. This is commonly caused by the fluid in the lens being clouded overs.

You can find more details and solutions here on Fixya at the following link below. Or click HERE


http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

The set is going into shut down mode for avariety of reasons. Some of the more common problems are vertical o/p ic bad connection or failure, poor solder connection usually in the power or hv section or possibly comb filter circuit breakdown causing 12V line to short. This set incorporate 7 or more shut down circuits and any one of them could be triggering - more trouble shooting is required

Check your hori output Transitor is more likely shorted.

Hello everyone, this is a common problem, this fix costs about $15 for parts, and some knowledge of soldering. here is the fix:

You need to buy these parts,

C707 - Part 0244211 (was 0244211F) - Cap. Ceramic DE1210R102K - $1.83

E994 - Part AZ00104M - Protector (CRXT491002) - $2.58

from: http://tritronicsinc.com/

the total should be around $12 with shipping.

then you remove the old ones, the numbers are labeled on the actual circuit board but if you still cant find them these pictures might help you:

http://img77.imageshack.us/img77/439/e994vj5.jpg
http://img441.imageshack.us/img441/1853/c707pic2cr8.jpg

and once they are removed solder the parts you bought in the place of them and plug the TV in and enjoy!

Unpluging the tv for about fifteen minutes.

tv was 12 years old, I retired it and bought a new one.

This sounds like the most common thing that fails on projection TV's, regardless of the brand. The convergence circuit has two STK392-110 IC chips mounted on heat sinks to drive the convergence yokes. They typically last anywhere from 5-10 years, then they fail. A more robust part is now available (STK392-150) as a direct drop-in replacement. My shop has installed these IC's in hundreds of projection sets and had fewer than 1% of them come back with repeat failures. Also check the following low-ohm feedback resistors to make sure they did not go out of tolerance:

• RK42: 2.7
• RK46: 2.2
• RK58: 3.9
• RK52: 3.3
• RK50: 3.3
• RK54: 2.2

My guess would be that the channel up or down switch on the set has become shorted or the plastic button has been forced in making constant contact with the switch behind it.

Your lamp is burned out . I have a 52" hitachi lcd as well, and i have hadd to replace the lamp once a year. its a mercury based bulb which emulates alot of heat and if your exhaust fans are not working properly it will cuase it to fail or burn out more frequently than it should. cost is @ $120.00 for replacement bulb

The symptom you have needs to be looked at by a qualified technician for proper diagnosis. There are 9 LED`s ( 8 green, 1 red) in the power supply that light up under normal condition. These LED`s are used to help pinpoint the area of trouble. For example, when power is applied all LED`s but one lights up. The unlit LED may indicate the +27 volt source is bad. That will alert the technician to check components related to the +27v line. Since there are 8 green LED`s and 1 red, each having multiple suspects leads us to Mr Spock`s comment to captian Kirk." there are endless possibilities"

That sounds like it is not booting properly. I would check for correct power supply opperation and if not that, look for a software reloading procedure in the user instruction manual.