20 Most Recent Hitachi 50FX20B 50" Rear Projection Television Questions & Answers

screen needs to be replaced.

In MENU --> audio/video ---> there is a sound setting to turn on/off the external speakers .... switch television speakers on if you intend to use them ....

Hello,
Please replace convergence output chips in tv to solve the problem. It requires good soldering skills/ expertise and click to buy convergence repair kit for this tv that has all required parts and instructions.
Hope this will help.
Thanks.

The problem is the 3 stk ic's that are called convergence outputs. ALSO there will be a set of resistors that need to be replaced. Average shop repair unless you have soldering experience. Ic cost around 8.00 each and resistors 1.00 each. shop should be around 200.00 total.

All projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both.

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

• 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.
• TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.

Here are some pics of convergence problems.






Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.


TV set after fluid change



SOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

• 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.
• TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.

Here are some photos of convergence problems.






Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

CONVERGENCE SOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Goto www.TvRepairKits.com

Your convergence Integrated Circuits (IC) are going bad which is a common problem for all Projections no matter what brand. Can be fixed by your local repair shop for no more then $250.00

1 watt,Service Manual I have says RK42 3.3ohms RK46 1.8ohms RK50 2.7 RK54 1.5 RK58 3.9 RK62 2.2

You dont it is a specialist job please take it to an autherised service center, it has high level UV from when turned on with covers removed do not risk it, as it can blind you.

Marc-Engineer

U have convergence prob.it dead.Tries these websites.Tv Repair World.com,Ebay.com to buy a convergence kit,repair what in that kit.U know how to solder right?

The convergence amp IC's are bad (STK 392-110) Replace with the Sanyo Type STK 392-120. Also check for burned resistors in that same circuit. Check them with an ohm meter to be sure because sometimes they look OK by appearance .

The problem is the signal strength receiving from the antenna. You may need an outdoor antenna to pick up the digital stations.

Your TV most likely has a problem in the convergence circuits. ( common problem )

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.

Here are some photos of convergence problems.




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.

SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, etc.

You need to change convergence amplifiers. Should be no problem for a professional

Status Part Number Description Substitute List Price Dealer Price Obsolete KR01227 SCREEN/SHIELD $374.31 $299.45

If all you hear is a click and you get no display on the screen, it sounds as though you need a repairman to come out and fix the circuit board. There are several things that cause this symptom on your set but the most common are convergenge amp failure, vertical, or power supply issues. Sometimes as simple as resoldering connections. Other times major troubleshooting and part replacement are required. The repair cost is usually between 175.00 and 375.00 hope you have a trustworthy and knowledgable repair person, good luck, Russmann.