My 46" Zenith rear projection TV now has a permanent "Hour-Glass" shape picture. It started out that it would come and go, but now it just stays. I have pulled the convergence board out, but I do not know where to get it checked or repaired/replaced. Is this the most likely problem? any chance it could be something else? I also cannot adjust the convergence on the TV.
An expert who has achieved level 2 by getting 100 points
An expert that got 5 achievements.
An expert who has written 50 answers of more than 400 characters.
An expert whose answer got voted for 20 times.
Re: Zenith 46" with a "hour-glass" picture.
If the hour glass figure is a seperation of colors that appear to be convegence mis aligned, then, the convergence ICs would be the problem.
If the picture is clear and you have a bending on the sides then the pincusion circuit in the horizontal circuit is where to look. Be careful of this circuit, it does control the high voltage.
The only way to have a board checked is to have an Authorized Service Center look at it.
It does, however, sound like there is a cold solder joint in the power supply that has gradually opened up and now is permanantly open.
Call Zenith (LG) to see who they recommend.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Sounds like a loose solder connection on the Convergence board or the convergence power board. If you are savvy and electrically safe, tap on the boards with an insulated screwdriver to see which has the loose connection, and you can resolder to fix. Repair from a service center = $150-300
You have a bad cap or two in the horizontal deflection [Pincushion problem] and you may have to look for a burned resistor. Use your vision to inspect burned areas on the board, this will most likely tell you where the problem may be. Area should be between the Vertical and Horizontal deflection. Look for the flyback transformer that is the board you are looking for! Hope this will you a good start. Thanks for asking!!
the sony service menu can be entered by pressing "display" "5" "vol+" also the diagnostic screen can be reached by vol- instead of + when you are in the service menu the number buttons navigate it its a little tricky at first but as long as you dont hit enter before you exit if you mess up it wont save just make sure if you fix it you save it by pressing enter
If there is a hour glass shape to the image but convergence is normal, there are 2 possibilities. You either have a pincushion correction problem or if the hour glass seems to be moving, it will be an open filter capacitor in the power supply.
Unless you are electronically inclined troubleshooting this issue will require a factory trained service technician. You can expect to spend $300-$400 to fix this.
The link you posted has been deleted, so I cannot see the picture you posted. If the sides bow in like an hourglass and the red, green and blue colors are still aligned then there is a horizontal width or pincussion problem, but if the sides bow in and the 3 colors have separated and are no longer anywhere near aligned then you have a convergence problem, both of which should be serviced by someone with experience in servicing projection TV's.