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I have hitachi 55pd8800ta plasma power supply 90v out put not osilated

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6ya6ya
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Posted on Jan 02, 2017

  • 33 Answers

SOURCE: I have a Hitachi plasma

It sounds like the transformer on board has gone out (not the one in the power supply) and is no longer charging the panel. the board internally that holds the transformer will have a model number on it, any decent repair facility should allow you to order the parts if you have the part number already. The transformer will be fairly hard to miss. It is a large block ( a few inches X a few inches ) that if you look at carefully it should look like a large coil of copper wire. Or should look like there is a large coil of copper wire in it.

Posted on Mar 10, 2011

tariq_romy
  • 116 Answers

SOURCE: HOW TO REPAIR POWER SUPPLY OF PLASMA TV HITACHI 42P MA400E PLASMA

no need to repair it dosent work ask to purchase new

Posted on Feb 18, 2010

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My plasma tv picture is fully gone but it still has sound. Tryed un plugging waiting ect still nothing What could it be? Hitachi 55 inch Plasma Model number 55pd8800ta


Sounds like your bulb is burned out. You can have a serviceman replace it or buy one and do it yourself. Go to ShopJimmy.com. They have your bulb and probably will give you instructions to replace the bulb, and answer any questions you have about it. Call ShopJimmy (877) 881-6492 / (952) 881-6492

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My hitachi plasma 42 PD7800TA does not turn on ,not even the standby ,the fuse is fine ,dont know what else to do? thanks Tony.


Hello
The power regulator board in your Hitachi is not switching. It is an SMPS [Switched Mode Power Supply]. Normally for plasma TVs the power supply repair will be almost impossibele due to lack of component availability. If the fuse is OK, definitley the switching process has failed it it. There is an IC which oscillates at high frequency, whic its oscillation signals are given to MOSFET transistors to chop the incoming AC, converted DC voltage. These switched voltage is passed through SMPS transofrmers which it turn generates secondary voltages that goes to different circuit boards of your TV. The power board is the most important section in a Plasma TV. it must be perfect in every respect in terms of secondary voltages. If any one of this voltage goes over than specified, the main boar will get damaged. So it is adviced to replace it as card basis, rather than making "sugery" to it. The power supply board can be had from Authorised Hitachi Service centers. You just give the the exact model number of your Hitachi TV. They will give you the orginal power supply board. Never play experiments with Plasma TV. OK.

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I have a Hitachi plasma model# 55hdt79 that went black out. No display at all. Sound is ok. We checked the power supply unit and found out that 90v output is missing. We changed the power supply unit...


It sounds like the transformer on board has gone out (not the one in the power supply) and is no longer charging the panel. the board internally that holds the transformer will have a model number on it, any decent repair facility should allow you to order the parts if you have the part number already. The transformer will be fairly hard to miss. It is a large block ( a few inches X a few inches ) that if you look at carefully it should look like a large coil of copper wire. Or should look like there is a large coil of copper wire in it.

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1 Answer

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If you have a light on ( standby light ), then I would say power supply fault, tv could be shut down because of faulty capacitors in power supply. if you dont have any lights at all , check fuse in plug,
( there will almost certainly be a fuse in the tv) but, that is for a tv guy to fix.
pete

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1 Answer

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hello,

Power supply board have problems,just not dead yet.Replaced the power supply board,will solved this problems.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Hope this helpout.......


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1 Answer

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this problem is from smps power supply of your tv circuit, may be power capacitor may be short , power transister may be short pls check some spair of power supply

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1 Answer

Hitachi Plasma 50 inch H4011 series just went off and red light blinked 4 times. Won't come back on even after unplugging and waiting 30 seconds and plugging back in per Troubleshooting guide in owner's...


Power supply board is dead.Replaced the power supply board,Ur tv will get the power back.Tries Shopjimmy.com,Ebay.com to buy a refurbish power supply board for replacement.

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