Question about Hitachi 50UX58B 50" Rear Projection Television

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65 hitachi projectin tv

I replaced both IC and tv turn on but the lights don't come on. Can anybody give me any suggestions on what else I can do?

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Re: 65 hitachi projectin tv

Make sure your soldering is good and you don't have ant soldering shorts.
make sure everything is pluged back in.
what was the orginal problem you were having?

Posted on Jan 17, 2008

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Have a Sony KP-65WV600, already replaced d board once, and replaced convergence ic's once also. Now as soon as I turn unit on, turns to red screen and shuts off, video that is, audio works ok, noticed...

Check High voltage Block.After replacing ic's (STK convergence ic's) you need to adjust Black&White scale.Turn ALL screen adjustments to min.Turn TV on and adjust screen slowly for each gun (I would start with Red first ) when you came to point that you see red background with white lines across, at that point G2 is too high (that will cause TV to shut down,don't worry just lowered adjustment and turn tv back on) so adjust to proper voltage and do the same for each gun.After that, adjust focus for each gun (again all controls are on High Voltage Block and HVB is mounted on front of your tv after you take speaker gril out) black box with 6 controls' screen RGB, focus RGB .
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I have white spots and black spots on right side of Mitsubishi WD-C657. I've done research online, and have heard its the dlp chip. Is that true, and if so, is it something that I can replace myself,...

This tv is it the DLP projection light engine block main board itself is the problems,not easily to go into the tv itself and replacing the IC chip itself.Must take out many mechanical parts to get u the Light engine block it self.U can replaced IC but somethime the IC chip it replaced,will not solved the problems,because the tv problems now the it is spreading and going on beyond the IC chip itself.If want to keep this tv very exspensive repair,i would reconmend hire a bound qualify tv tech replaced the whole Light projection block itself,but first call Mitsubishi for some kind of deal,they might help with the repair amount cost.

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Tv flashes red then shuts itself off after only on for 3 min

I have not repaired this particular model. But sometimes there is an IC they refer to as a standby IC. It may also be known as a controller IC. I call it the powerline regulator. And in one case the older Sony Projection TV had an audio output IC with a standby built into this IC. So,this advice is refering to a standby IC. And this IC may be in another form already mentioned. Please visit a Sony Tech. The work inside a projection TV is very complicated, you will need to see the specialist. Give them this note and go from here. Let me know how they handle the repair.Thanks for asking and good luck!

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It sounds like a convergence problem; either bad solder connections at one of the convergence Ic chips or a bad Ic. if this was helpful give me a vote----if one of the chips is now bad it will have to be replaced(usual thing is to replace all the convergence ic chips---most use two and a few 3.

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1 Answer

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ok , on hitachi pro tv is very common with bad power supply u may want to replace the voltage regulator which is next to the fuse u already replace , also loose connection on all the power supply seccion , also u may want to check the resistor close by the convergence ic 2.2 ohn if this are smoke replace stk392-110

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My hitachi 50ux58b red light comes on but tv wont come on.

check diod d915
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NYGirl, the convergence circuit is failing, The IC`s will have to be replaced and all precision resistors will have to be checked, I don`t know who told you this was easy to do but I can assure you it is NOT an easy fix, If you have the service manual, access to a supply house that sells good quality IC`s ( I can give you that number if you think you can do this) a working knowledge of soldering and un-soldering and a good quality voltmeter you can remove the board and do this job, approximate repair time by a qualified tv tech is 2 hours, if not I strongly suggest you call a tv tech, questions? e-mail me back, BMW Rider

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