Question about Hitachi 51UWX20B 51" Rear Projection Television

10 Answers

Color convergence on Hitachi Projector TV 51uwx20b chassis dp23

I bought stk392-150 upgrade kit to fix the color after instaiing the two stk and 6 resistor still the same problem any i ideas on what could be wrong.. thanks eddie

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  • 14 more comments 
  • eddie villarejo Feb 03, 2009

    i did do that nothing same problem

  • eddie villarejo Feb 03, 2009

    do u know the exact ohm on the resistors rk-42,46,50, 54,58, and 62. where would i find e994 fuse i dont think its in the power supply

  • eddie villarejo Feb 03, 2009

    does any have the prints to tell me the vaule of all the resistors is there any specials fuse i should be looking for

  • eddie villarejo Feb 03, 2009

    i check all the fuse in the convergence board everyone test good

  • eddie villarejo Feb 04, 2009

    im just going to order new parts what should i get stk-392-110, 150, or 180 is there something else i should get. also order all the 6 resistors. i resolder everything on the board replace the new one with the old ones still the same thing. i cant see me getting two bad stk. dont know what else to do....

  • eddie villarejo Feb 04, 2009

    where should i check for volage supply?

  • eddie villarejo Feb 04, 2009

    i get +28 and -28 on both stk pins 4,5,8,10,12 and 17

  • eddie villarejo Feb 04, 2009

    pin 2 is ground

  • eddie villarejo Feb 04, 2009

    any more ideas guys????

  • eddie villarejo Feb 05, 2009

    i dont really see why i should do alignment i dont want to move the manates it work before there has to be something as burn

  • eddie villarejo Feb 05, 2009

    help

  • eddie villarejo Feb 05, 2009

    i get SW-7V at QK01 emitter and output -7V at collector not 5v

  • eddie villarejo Feb 05, 2009

    i get SW-7V at QK01 emitter and output -7V at collector not 5v

  • eddie villarejo Feb 05, 2009

    i get SW-7V at QK01 emitter and output -7V at collector not 5v

  • eddie villarejo Feb 05, 2009

    yes they r i clean them still the same thanks

  • eddie villarejo Feb 06, 2009

    yes they r i clean them still the same thanks

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10 Answers

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  • Hitachi Master
  • 19,396 Answers

I don't think the new Conv. board is faulty, also voltages to board had been tested and they are fine. Also Stk ICs read fine.

Clearly it is not a pwer board problem, or you get no power condition or PWB diag on hitachi.

If you have wrong colors check also that the CRts are all working, you will need to test the CRTs AC boards.

Ensure that there is no short to the chassis, that all the screws are in place.

Start testing the small AC power boards that power up the CRT

Test also the following parts:
Flyback transformer: BW02891
Signal power board JT23031
Focus pack AZ00161
Horizontal Linearity BZ04611

Posted on Feb 07, 2009

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  • 139 Answers

Still can you describe more about the issues so that I can help

Posted on Feb 06, 2009

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  • 48 Answers

Hello Eddie,

This may seems really basic but it has happened to me after a few frustrating hours of tweaking with no result.

Are the pins in the connectors for the CRT clean? If they are dirty or corroded it could cause poor picture quality.

Posted on Feb 05, 2009

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  • 108 Answers

If this set has digital convergence and I am sure it does and you attempted to straighten out this converegence before replacing the parts and you saved your changes then you have written bad data into the digital convergence module. Even though you may not have seen the lines physically move when you were trying to correct the converegence, the data still changes. This could be the reason you are still having an issue after replacing the defective parts. Otherwise, there should have only been minor adjustments that needed to be done after making the repairs.

Posted on Feb 05, 2009

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  • 158 Answers

Sir.

tnx for using fixya

resolder the terminals... they should fit well and good solder...
if it does not fix the problem.. remove all the upgrade components then return the original one... if it works well, then the replacement or upgrade components has trouble...check thier values and operating condition using a tester....
tnx...

Posted on Feb 03, 2009

  • Rodolfo Atun Feb 04, 2009

    if the resistors are not shorted or open, then it is the the stk that malfunction... the best way to solve the problem is by purchasing another one... i will not recommend any version of stk, it depends on you sir. but please check the compatibility of the add on sir, it is very important specially in upgrading...



    tnx

  • Rodolfo Atun Feb 05, 2009

    i suggest that you look for burned, crack or blotted components on the board... youre right, there must be something that went wrong... the best thing to do is to check the components if ever doubtful signs appear on the board and its components.... pls do test thier condition... test capacitors, resistors, diodes, fuses and more....

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Hi,
Download Service Manual of Hitachi 51UWX20B for FREE from HERE, download all 16 files and use WinRar to unzip it.
You will have schematics, part list PCB lay out etc.

still need further help, let me know.

Posted on Feb 03, 2009

  • 2 more comments 
  • Shahid Electronics
    Shahid Electronics Feb 03, 2009


    • RK42 = 3.3 ohms 1w

    • RK46 = 1.8 ohms 1w

    • RK50 = 2.7 ohms 1w

    • RK54 = 1.8 ohms 1w

    • RK58 = 4.7 ohms 1w

    • RK62 = 2.2 ohms 1w
    Just download service manual and have all parts details.
    Good luck.


  • Shahid Electronics
    Shahid Electronics Feb 03, 2009

    I'm sure you are missing +28 and -28 volts supply on STKs. Please confirm above said volts coming from power supply. Service manual will help you to track down it.

  • Shahid Electronics
    Shahid Electronics Feb 04, 2009

    Please confirm SW+7V at IK01 pin-1 and output +5V at pin3
    and SW-7V at QK01 emitter and output -5V at collector.

    If above said voltage are OK then Digital Convergence Board is defective and requires replacement.




  • Shahid Electronics
    Shahid Electronics Feb 05, 2009

    " i get SW-7V at QK01 emitter and output -7V at collector not 5v "

    Output should be -5 Volt at collector of QK01 as per service manual.
    Please check biasing resistors and also QK01 as it can be leaky or damaged.



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  • Master
  • 6,966 Answers

Hi and welcome to FixYa,

If you got the STKs and the resistors as a package/kit, then they should serve the purpose. Additionally, you may want to check the pico fuses. A pico fuse would look like the image below (sometimes black in color).
Color convergence on Hitachi Projector TV 51uwx20b - f51df2b.jpg
Good luck and thank you for using FixYa.

Posted on Feb 03, 2009

  • 1 more comment 
  • Louie  Role
    Louie Role Feb 04, 2009

    If the fuses checks good, the STKs & the low ohmage resistors checks good or new and known to be good, then alternate possibility is low or no supply voltages. Have you checked the voltages using a DVM/VOM?

  • Louie  Role
    Louie Role Feb 04, 2009

    Verify that PIN:
    8 is GND
    11, 14, 15 & 18 are +Vcc
    12, 13, 16 & 17 are -Vcc

    Cheers.


  • Louie  Role
    Louie Role Feb 04, 2009

    Have you done an alignment after replacing the STKs? The Service Manual as provided by welcomejee would have details on how to align.

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U can get it at radioshack websites the exact fuse.
and for more details about how to check out the ic is it connected properly or not just click this link the brand is different but the problem is same
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm

Posted on Feb 03, 2009

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Try to check the video power supply board. There might be a defective component there.

Posted on Feb 03, 2009

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  • 153 Answers

Check wih the connections if all r perfect
then try removing all and pluging it again

Posted on Feb 03, 2009

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1 Answer

My TV is the Hitachi model 51UWX20B and tried using magic focus to line up red color. Picture looks like 3D with red off center. When using magic focus it gets to the red phase and it shows the number 5...


You need to replace the STK ICs which are Convergence ICs STK392-110 use 120s or 150s
also check the small ohm resistors around ICs . They are Big Black ICs and will have part number on them ,should be located on the Right hand side of Chassis .
Mats Eletronics has Parts 1-800-628-1118 Convergence IC Kit.

Jul 04, 2011 | Hitachi 51UWX20B 51" Rear Projection...

Tip

Hitiachi Convergence Circuit Resistor Values


This site has been very helpful in diagnosing and repairing my Hitachi 57XWX20B. I recently changed the IC's and a resistor to fixe a convergence problem and had to use the small button on the convergence circuit to get set to return from static mode and enter dynamic mode. I searched everywhere trying to locate the correct resistor values and noticed many other's needing the same information. Here are the results of my research. I obtained some from manuals and others from comparison of the different models. My main focus was finding the values for the 57XWX20B. The resistor values are given in ohms at 1 watt. This means RK42 is a 3.3 OHM 1 watt resistor. RK58 was the problem in my set. It was giving a value of 2.3 and needed to be 4.7. I first replaced the IC's and thought the resistors were all good, but I later noticed my convergence was off. I could manually align it but the magic focus initiation would not save. It gave an overflow error. I bought the sanyo brand of IC's, not the cheap inports and found that if you use a desoldering wick then the repair is easy. The new IC's restored the beautiful color the set had when new. Now it is brilliant as well as converged. My repair cost was:
STK-110 13.00 Bought from local electronic supplier
STK-150 15.00
RK58 3.00 Bought from a local TV repair shop

The elecronic supply store gave me 6 inches of desouldering wick
Total cost: 31.00 Dollars

51UWX20B DP23
57UWX20B DP23
51GWX20B DP23G
57GWX20B DP23G
43FWX20B DP24
51XWX20B DP23
57XWX20B DP23
51SWX20B DP27
57SWX20B DP27
65SWX20B DP27
57TWX20B DP27D
65TWX20B DP27D

DP 23 DP 24 DP 27 RK42 3.3 3.3 3.9 RK46 2.2 1.8 1.8 RK50 2.7 3.3 2.7 RK54 1.8 1.8 1.8 RK58 4.7 4.7 4.7 RK62 2.7 2.2 2.2

on Apr 02, 2008 | Hitachi 57SWX20B 57" Rear Projection...

2 Answers

Color will not match up


if your talking about the sets convergence does not line up and it looks like a 3-D picture than The best advice I can tell you at this point is to go to tvrepairkits.com and order the complete convergence kit for your model of TV set, no need to search and order multiple parts from different sources and pay multiple shipping fees! Go to http://www.tvrepairkits.com/xcart/home.php?partner=larry
The kit comes with original Sanyo STK IC'S , not those cheap aftermarket or china made IC'S full pictorial directions, the thermal paste, resistors, the correct Pico fuses, AND free live on-Line tech assistance in case you run into a problem with the repair. They ship out 2 to 3 day Priority mail, the next day in most cases GOOD LUCK!!!
Larry Dillon.
http://www.fixya.com/support/r3342653-convergence_fix

May 08, 2010 | Hitachi 51UWX20B 51" Rear Projection...

1 Answer

Red shade to ever one


Convergence are dead.Must know how to solders?Must replaced 2 STK convergence ICS,and some or all it resistors.Tries Websites like Tv repair world.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost u $300-350 for the parts and labors.

Apr 20, 2010 | Hitachi 51UWX20B 51" Rear Projection...

1 Answer

Have Hitachi 50 inch Projector TV, model 51F500A. Built 6/2004. Picture has shadows, primarily in red color, on objects or writing. Top 6 inches distorted as well as bottom 2 inches. Tried Magic Focus...


that is come from your convergence panel theres
2 ic call stk - xxxx
youe have to replace it and then remake alignement for your convergence you should have it in the menu adjustement then magic focus will finalized and you can replace the 45 volt regulator transistor
hope that give you a idea//and should not be to expensive if you get an honest
good luck

Mar 22, 2010 | Projection Televisions

1 Answer

I am seeing double on my tv how can i fix this problem.thanks


Replace Both of your STK ICs and 5 or 7 low ohm resistors if your stks are 110s , 150s, upgrade to 180s.STKs are your convergence ics they are the big black ics will have part number on them STK392-110 etc...

May 20, 2009 | Hitachi 51UWX20B 51" Rear Projection...

2 Answers

Have an Hitachi 51UWX20B that has the 3D thing going on, when I adjust it manually, and exit, the TV wont let me save, cancel, reset, or go back! Have to turn TV off to get out of that screen. Any advice...


Do not adjust any knobs as instucted in the previous thread if you TV have a convergence problem. Doing so will only make things worse. The blog does however show you how to fix other common problems with these sets.

Here are some of the most common symptoms and example photos of a convergence problem

  • Screen looks 3D
  • Colors don't line up
  • One or more colors can't be adjusted when using the convergence menu.
  • Screen is bowed or warped.
701cb04.jpg
77ea520.jpg
f0900cb.jpg
Here is a quick test....

Using your original remote go-to the tv settings then goto the convergence section.

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.

Feb 21, 2009 | Hitachi 51UWX20B 51" Rear Projection...

1 Answer

Hitachi 51UWX20B Projection TV


Hitachi part number JT23051 is Obsolete the new part number for the Deflection Convergence PWB is JT23051R its available from Hitachi for around 350.00

Oct 08, 2008 | Projection Televisions

1 Answer

Color ghosting


KIT10 $29.50
Repair Kit for Hitachi convergence Chassis DP-14G
KIT10 Includes 2 pcs STK392-150 , 1 each of the following 1W axial lead fusible resistors:


http://www.digitalhome.ca/forum/showpost.php?p=564268&postcount=220
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Nov 11, 2007 | Hitachi 50GX30B 50". Rear Projection...

3 Answers

Hitachi 50" 50GX30B PJTV


Solution:
Your TV has a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in but stationary.
Here is a quick test....
Using your original remote go-to the tv settings then goto the convergence or magic focus section
Try to adjust the red and then the blue convergence.
You should be able to move them up, down, left, and right.
If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.
You can get a repair kit that includes all the parts from www.TvRepairKits.com.
They have put together a kit for the Hitachi TV sets.
The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc.
Everything you need to fix it yourself. Its a fairly easy fix on the Hitachi sets.

Oct 20, 2007 | Hitachi 50UX57B 50" Rear Projection...

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