Question about Hitachi 43FDX20B 43" Rear Projection Television

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Hitachi 43fdx20 power supply removal to replace Convergence

I have all wire disconnected to replace th ic convergence. Cant get the red ones off. How is this done?

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  • jj2tuff Jun 04, 2009

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Hi, doesn`t need to be removed and I strongly advise you to not remove them. That flyback is no longer for sale, if you break any of the tabs high voltage will leak and arc all over the place. the entire board assembly should be slid back towards you and then lifted straight up so your looking at the solder side of all the boards, unsolder the ic`s, r&r with new ic`s, be certain you use new heatsink compound on new ic`s or they will fail, questions? email me, gl, video-tek

Posted on Jun 02, 2009

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Red and green waves...double vision ...how old...how valueble...hitachi 43FDX01B


Try adjusting the convergence. If it won't move see below- (or hitting Magic Focus for some Hitachi’s)

This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually $200-$400 Be sure to vote/rate me if this helped Thanks!
See link for more detail
http://www.ehow.com/how_4575598_yourself-projection-tv-repair-convergence.html

Nov 05, 2009 | Hitachi 43FDX01B TV

1 Answer

Red color is not aligned


Try adjusting the convergence. If it won't move see below

This sounds like convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors. Shops usually charge between $200-$400

Oct 02, 2009 | Hitachi 43FWX20B 43" Rear Projection...

2 Answers

I Cannot get the red to center on the convergence adjustment.


This is a convergence output IC problem. convergence board would have to be removed -than remove and replace 2 STK IC's and check the surrounding resistors.

Sep 26, 2009 | Hitachi 43FDX01B TV

1 Answer

Hitachi 51UWX20B no sound, no picture, blinking green LED


The 392-150 is a higher current device then the 110---you can use either--this is normal in the hitachi sets---I usually replace both with 150's---check the led that does not light---should indicate which voltage source is bad---if it is one of the 2 voltages for the convergence ic's(one is a positive and the other a negative voltage) then the convergence Ic's may be bad---look for any discolored resistors around the ic's---one way to tell if it is a convergence ic is to de-solder both ic's and see if the set turns on(the convergence will be out the window) but if it comes on change both and do the alignments with the Hitachi remote. By the way----the led should have a location number printed on the top of the circuit board.

Aug 07, 2009 | Hitachi 51SWX20B 51" Rear Projection...

1 Answer

Hitachi Projection TV will not turn on just blinking power light


There is a board on the right side of the tv called the convergence bd

There are little connectors that are on the left of the board
the last one is the power to the convergence Ic's

That is the one that is closest to you. they are little black conectors with wires in them


Carefully lift it up

Then plug the tv back in and see if it fires up

If it does do not run it long

just enogh to see the tubes light
then shut if off

If it goes on

your convergence ic's are Shorted

They have a kit for this tv it is available through local parts distributors
If you can't find it locally just Google HITACHI CONVERGENCE KIT

If you are not good with de-soldering and soldering do not attempt this repair. Remember to replace all the resistors in the kit

If you are not sure about doing this repair you should have your local tv guy do it for you


If it does not go on then I would suspect the regulator in the power supply But
Most of the time it's the ics


Feb 08, 2009 | Hitachi FDX Series 43FDX10B 43" Rear...

1 Answer

Red light turns on and off no picture


There is a board on the right side of the tv called the convergence bd

There are little connectors that are on the left of the board
the last one is the power to the convergence Ic's

That is the one that is closest to you. they are little black connectors with wires in them


Carefully lift it up

Then plug the tv back in and see if it fires up

If it does do not run it long

just enough to see the tubes light
then shut if off

If it goes on

your convergence ic's are Shorted

They have a kit for this tv it is available through local parts distributors
If you can't find it locally just Google HITACHI CONVERGENCE KIT

If you are not good with de-soldering and soldering do not attempt this repair. Remember to replace all the resistors in the kit

If you are not sure about doing this repair you should have your local tv guy do it for you


If it does not go on then I would suspect the regulator in the power supply But
Most of the time it's the ics

Jan 16, 2009 | Hitachi FDX Series 43FDX10B 43" Rear...

1 Answer

Convergense problem


The color has gone crazy on you because your convergence IC's have gone bad.
These IC's operate at a very high temp, and usually only last 4-5 years. 
If you remove the back of the set, you will want to look for the BIGGEST heatsink in there, on that heatsink, you will see 2 lage IC's , probably STK392-110, or STK392-150's you can go on ebay to order the new ones, but MAKE SURE they are Genuine SANYO IC's and not counterfiet cheapies. the cheap ones may only last 2 months..
You will also need some "Heat transfer paste" - you can pick this up at radio shack.
Once you remove the old IC's, test all the large resistors near them.. pull one side of the resistor out of the board so you can check it out of circuit. they will usually have the value in Ohms, printed directly on the resistor, but you may have to use the resistor color code to find out what value they are....However, usually if there is any damage, the resistor will look like it has been HOT or fried. replace the IC's and any bad resistors, and you should be good to go.
If after replacing the IC's and any defective resistors, the convergence is still bad, make sure to use a multimeter to check ALL fuses on the boards, --- sometimes when the IC's go, they will take out a fuse to the convergence power supply. If you find any bad fuses, replace them accordingly!
Hope that helps!

Dec 21, 2008 | Hitachi 43UWX10B 43" Rear Projection...

1 Answer

No raster, no sound on 53UWX10B


double check the wire connections, as the filaments not being lit makes me thing a wire isnt connected properly, or one may have been loosend while doing the convergence repairs.

Jun 12, 2008 | Hitachi 53UWX10B 53" Rear Projection...

1 Answer

Tv troubleshoot for me


chances are that IC804 has failed. You have two ICs that allow you to converge the three colors. IC804 is used for Red Horizontal and Vertical Convergence and also for Green Vertical Convergence. IC805 is used for Blue Horizontal and Vertical Convergence and also for Green Horizontal Convergence. These ICs run very hot and have a very high failure rate which sometimes will cause damage to resistors in their associated circuits. They are both STK-110 and it's best to replace them both at the same time. It's also a good idea to upgrade them to either STK-150 or STK-180. These will run a lot cooler than the STK-110.

Before replacement do inspect for any open or overheated resistors as I stated earlier. Being you only have problems with Red Convergence the plus and minus power supplies should be okay since they are common to both ICs.

Try www.tritronicsinc.com. They have the Hitachi CZ00433 (STK392-150) in stock for $20.11 ($32.43 retail). These are Hitachi OEMs. I've had very good results replacing STK392-110s with these chips. Do check for open or overheated resistors before replacing these chips

Dec 29, 2007 | JVC AV-48WP74 48" Rear Projection...

1 Answer

Convergence


Your going to need to check the schematic and check the b+ going to the IC's as there maybe a bad capacitor. When the new IC's are installed it loads down the set or power supply. Its the bad power supply or the IC's are defective, but im thinking the power supply.

Aug 13, 2006 | Hitachi 53UDX10B 53" Rear Projection...

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