Question about Hitachi 50V720 Television

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Lamp problems? I have owned this tv for 2 years now.  I have replaced the bulb once, and the new bulb is only 6 mos. old.  The picture is very dark.  I have the brightness and contrast settings all the way up and still have difficulty seeing a good picture. What do you think could be the issue?  Is the bulb bad again?

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Re: lamp problems?

if you have the rite equiptment , check the supply voltage

if it is low replace the complete assembly, some parts dist carry rebuilt units

Lou Margo
Allied Electronics

Posted on Dec 26, 2007

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I have a 2003 rca big screen, D495Cd05V serial #, HDLP50W151 model #, 4103067310297 lamp, 260962 part#, 50W151YX1 service number HDLP... the tv works an turns on but u cant really see the screen that great...

If the picture is dark you will need to replace the projection lamp. Make sure before replacing that the TV has been turned off for at least an hour as the lamp does get very hot. Just do a google search with the lamp part number of 260962 to find a decent price for it. Be careful as some will be just the bulb and not the complete assembly. I suggest replacing the complete assembly as replacing just the bulb requires gloves and being very careful handling the bulb assembly. There is an access door on the lower right side of the back of the TV where you can get to the lamp. Make sure the TV is unplugged and once you put the new lamp in make sure the door is placed back in correctly otherwise the set will fail to light the lamp. Good luck and I hope this helps : )

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Your power supply board is dead, u know basic electronics' and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get your TV power stable,and work again.Or tries websites like, to buy a whole refurbish power supply board for the replacement.

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My 61" hitachi rear proj has a very dark picture.

It sounds that lamp in TV is weak and not throwing enough light to bright the screen for good image.
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If lamp has not been replaced yet or in last 2-3 years, replace it.

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1 Answer

I can't seeem to find out how to put the new lamp back into the t.v

if this is either of the 51" or 56" DLP tv's, it is very simple.
-Make sure tv is UNPLUGGED!
-Open the side compartment on left side of tv as you are facing it from the front.
-Take off the door and you will see the lamp housing.There are 2 screws facing you.Unscrew these and set the screws aside.
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-Set housing down on table or somewhere with good light.Make sure not to touch bulb of either the old lamp or new as oils from fingers can distort picture.
-Now,undo screws on shiny metal piece.There are 2.Take off metal housing piece.
-You now see the back of the bulb.If you look at the lamp from the front,you will notice where the 2 wires are fitted into a bracket with 2 screws.
-Unscrew those screws to loosen the bracket.The replacement lamp should have the exact same bracket.If not you can just undo the wires to the old lamp and connect the same wire harness to the new one.
-once the wire bracket is unscrewed, pull it out of its fitting and then unscrew the 4 screws holding the lamp in.
-Take notice of how the shiny metal clamp-fitting is situated to hold the lamp in place so you can put it back on the right way.
-Once loosened, the bulb should be able to come out and you can put the new one right in it's place. Make sure to keep the top wire connector on the bulb at about 11 o'clock and that a nub on the bulb fits through a spacer on the shiny metal clamp-fitting.
-Now tighten the 4 screws on the clamp-fitting and make sure the wire screw connectors on bulb are tight as well.
-Take the now loose rubber-covered wires and tighten them into the bracket-fitting the way the old ones were,with plugs and lamp facing the same way.
-With everything now tight,put metal housing back on and tighten the 2 screws down.
-Take the whole unit and slowly slide it back into the tv making sure that the plugs slide into their rightful place.This should be easy,but may require a wiggle or two.
-Now screw in the 2 screws you have left into the plastice mounting piece. Re-attach the door and plug the tv in.Wait a few minutes and then turn on tv.
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TIP:Do not put a cold bulb in and then turn on immediately.I like to let the bulb sit in the tv with it plugged in for a while until the bulb is warmed and ready.
Good Luck! -Chris

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