20 Most Recent Toshiba 55H70 55" Rear Projection Television - Page 4 Questions & Answers

1.8ohm resistor next to the STK ICs STK392-110s are the convergence ICs.

CK the 1.8ohm resistors and you might need to replace both of the convergence Ics STK392-110 use 120s Mats has them 1-800-628-1118

Replace the STK ICs Two of them, STK392-110s use 120s and CK the 1.8ohm resistors near ICs Mats has the Parts 1-800-628-1118

If the repairman you have called does not know ahead of Time which Parts he Needs to Bring on Service Call then I think I would worry if he really knows what he is doing?I always Pull up on my computer Customers Model # and What are the most likely Parts that I will need in order to complete the Repair in customers Home.
Most likely the STK ICs need to be changed out STK392-110s,better to use the 120s and CK 1.8ohm 1 watt resistors feeding STKs

Hi

Thanks for using FixYa. You'll need to reset it. To reset the TV turn it off and wait for 5 minutes. After 5 minutes unplug the television power cord from the electrical outlet and let the television remain without power for more then 1 minute. Plug the power cord back into the electrical outlet. If the television is plugged into a power surge protector, remove it from there and plug it directly into the wall outlet. Turn on the television. If the issue is resolved, then the problem is with the power surge protector and not the television. If the issue is not resolved then this might have happened due to over-voltage. Please check the power supply unit for swollen/ bulged capacitors and burnt wires/components on the power supply board, also check the fuses if they are fine & not blown. Please make sure to turn off and unplug the TV for at least 1 hour (this will drain off current from all components especially capacitors) before you perform any repairs. Also note that the TV consists of very high voltages even when it is in off condition. All this is only recommended if you have electrical expertise and know how to solder/re-solder components. Please accept the solution if the issue is resolved or post a comment for further assistance.

Thanks

Rylee

Hello,


Your power supply board is dead, u know basic electronics’ and soldering? Most of the times, the power supply board just have dead leakages gases capacitors.These capacitors always bulges up on it top,or puff up on it top.Replaced these gases leakages capacitors will get youur TV power stable,and work again.Or tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish power supply board for the replacement.


Take care...............

You have a bad resistor 1.8 ohms it controls the red convergence
you have 3 of them all are 1.8 ohms 1 watt they are located in front of the Convergence ICs STK392-110

try unplugging the three convergence yokes then try powering up the set to see if it powers up. If it does replace both convergence ICs

common on these models is open fuses and convergance. the blinks give a code to the issue. need to know the blinks , count the blinks please.

The tv make alots of clicking?When u turn on the tv?Yes,than ur ballast board is dead,this board the board help the projection lamp to light up.

count red blinks call tech support....power bd.

Hi


Thanks for using FixYa. You can buy the parts for your Toshiba 50HX70 from this link. Please do rate the solution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

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 projeciton 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 will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you are handy and can follow directions. You can get complete repair kits from TvRepairKits.com or click here. They have put together DIY repair kits that include the OEM parts and step by step photo instructions for each repair. If you are not handy or can't follow directions we would suggest calling a shop.

Projection sets have two very common problems.

The first common problem is convergence


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

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

voltage issue on the power supply most likely

Replace the Micro!

Best practice is to replace it with the same value. You do not know how it is being used. The replacement capacitor should have the same voltage rating or higher, that is the only wiggle room you should allow. The uF value is very important. I hope this was of assistance.

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.

Convergence problems are very common on all Projection TV sets including Sony, Samsung, JVC, Philip Magnavox, Panasonic, Akai, Pioneer, Hitachi, Zenith, and others. You can get a convergenece repair kit from the link below.

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 - 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.

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 solution

CONVERGENCE SOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses.
This is a a fairly easy DIY job if you know what you are doing. If you have never done this before we would advise calling a shop or if you want to do it yourself get a complete kit with instructions and support from www.TvRepairKits.com

you need to repair the connections on the two main power supply capacitors and replace the blown fuse. but make sure if the fuse is bad repair those connections FIRST!!!!!
techman