Question about Hitachi 50SBX78B 50" Rear Projection Television

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Hitachi model #60SBX78B

I have a Hitachi rear projection tv model #60SBX78B and it recently stopped working. The red power button lights up indicating that the power is on but there is nothing else happening. There are also some green lights on the electrical boards that are lit up and stay on. I have checked the fuse and it is good, but other than that I'm not sure what to look for. Any suggestions would be appreciated.

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If you have Hitachi model number 50UX58B, 60UX58B, 50UX58K, 60UX58K, 50SBX78B or 60SBX78B and you have the following symptoms you may want to grab a repair kit from www.TvRepairKits.com. They have put together a kit that includes the parts and instructions to fix these models. This is a fairly common problem with the above model numbers. It is typically caused by a blown capacitor and pico fuse. Again, you can get a kit from the above address. 
Here are the symptoms...

Primary Symptom: No Audio or Video. Power light will come on briefly then shut off.
Other Possible Symptoms : The green LEDs on the circuit board light up for a few seconds then turn off.

Hope this helps,

Posted on Nov 08, 2008

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  • Master
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The green led or lights on the board indicate some of the power supplies are working. The key is do you see any come on and then go out. this would indicate which part of the power supply is failing. also there are fuses in the set that do not look like your standard glass fuse. WARNING television generate lethal voltages that will hurt you. extreme care should be used.

Posted on Jan 18, 2008

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1 Answer

The TV was working en shut him self off. Wont start now .


This may be caused by convergence IC's being defective and some resistors around them not being the proper values.

I have repaired another Hitachi model Rear Projection TV that would start up and click click click and flashing red light, then replaced the convergence IC's STK392 series and a few burned up resistors and good as new :)

You will have to be handy with a soldering iron to complete this task, and there is a kit you can buy also http://www.tvrepairkits.com/xcart/60sbx78b/ it comes with everything you need and even teach you how to solder if your not already good at it.

Hope that helps

Christopher

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My Hitachi 60sbx78b popped and then shut off. It will not power back on, I plug it up and it sounds like it is getting power, the green led lights come on for a few seconds and then they go off and the...


On this model there is a common failure with some capacitors and fuses. Its a simple fix if you know which parts to use/avoid and how to do the repair. You can get complete instrucitons and parts for your model from www.TvRepairKits.com . Their kits include step by step color instruction guide as well as the correct parts to fix this issue.

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replace pico fuse E994 and capacitor C707. You have to disconect alot of wires and remove the screws holding the boards. you DON'T have to remove the large high voltage wires. You have to stand the board on it"s edge to unsolder the components from the back side of board. Good luck it worked fine for me. fcs0998@aol.com gene

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If your remotes are out of the room and you try to turn and it still wont come as it should ,then You have a problem with the power switch or the supply, your unit needs to go to the shop . Sorry. DFD

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2 Answers

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If you have Hitachi model number 50UX58B, 60UX58B, 50UX58K, 60UX58K, 50SBX78B or 60SBX78B and you have the following symptoms you may want to grab a repair kit from www.TvRepairKits.com. They have put together a kit that includes the parts and instructions to fix these models. This is a fairly common problem with the above model numbers. It is typically caused by a blown capacitor and pico fuse. Again, you can get a kit from the above address. 

Here are the symptoms...

Primary Symptom: No Audio or Video. Power light will come on briefly then shut off.
Other Possible Symptoms : The green LEDs on the circuit board light up for a few seconds then turn off.

Hope this helps,

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If you have Hitachi model number 50UX58B, 60UX58B, 50UX58K, 60UX58K, 50SBX78B or 60SBX78B and you have the following symptoms you may want to grab a repair kit from www.TvRepairKits.com. They have put together a kit that includes the parts and instructions to fix these models. This is a fairly common problem with the above model numbers. It is typically caused by a blown capacitor and pico fuse. Again, you can get a kit from the above address. 
Here are the symptoms...

Primary Symptom: No Audio or Video. Power light will come on briefly then shut off.
Other Possible Symptoms : The green LEDs on the circuit board light up for a few seconds then turn off.

Hope this helps,


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1 Answer

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You can get the parts from www.TvRepairKits.com. They have put together a kit that includes the parts and instructions to fix the following models (50UX58B, 60UX58B, 50UX58K, 60UX58K, 50SBX78B or 60SBX78B). 

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Matt, Hitachi`s have a series of green LED`s and one red LED on the main board, un-plug the tv for 30 seconds and then with the back cover removed plug the set back in and watch the led`s while someone else turns on the set, usually the led`s will temporarily light then one or more will immediately go out and then the rest will slowly go out and the red one will then start blinking, each led is a power supply indicator, 130 volt, 12 volt, 5 volt etcetera, find out which one(s) going out first and get back to me, BMW Rider

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1 Answer

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On this Hitachi model there is a common failure with some capacitors and fuses. Its a simple fix if you know which parts to use/avoid and how to do the repair. You can get complete instrucitons and parts for your model from www.TvRepairKits.com . Their kits include step by step photo instructions as well as the correct parts to fix this issue.

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I have seen that symptom many times. Most likely, the little blue capacitor next to the horizontal output transistor has shorted and popped the main B+ fuse. This is very common in those Hitachi projection sets. These parts should be replaced by a tech familiar with Hitachi projection sets.

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