Question about Mitsubishi WT-46805 46" Rear Projection Television
The best thing to do here is just replace the TV, new LED and LCD TV's are very cheap and have much better image quality.
Posted on May 19, 2017
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Posted on Jan 02, 2017
Good Day, Corri;
It sounds like the TV has a Circuit problem in the convergence circuit. If it comes and goes then the concern can be corrected by re-soldering the 'conv' output IC"s. A semi-minor repair and cost.
Good Luck, big IRISH.
Posted on Jul 25, 2008
Sorry for the late reply I just got up.
From what I understand of your problem it is most likely a blown capacitor or main IC. Unless I can open up the unit and test the IC's and capacitors I can not be really sure which is why I hardly answer questions about TV''s as they are hard to troubleshoot without the unit in front of you. Ive found a site that can help you via a service manual since I could not find the exact service manual for you from my manual book. The site also has the parts that you will need if ever im right and it is the capacitor or IC. As for the IC's by experience is hard to test without an Oscope but you can do it by gradually eliminating the problem, again you will have to refer to the service manual regarding that. By the way the capacitors I mean is the one that goes to the main module as that is what powers the controls for the TV. the green light is just the "pilot light" which means you have power to the TV but the power is not going past the capacitors to the main controls or the main IC. So simply put the problem can be the capacitors (Which is what you check first) if they are ok then look at the IC via using a service manual. You can use a multitester for the capacitor first if they are dead then just change them and you should be ok. Let me know what happens or updates ill reply to them as well.
Posted on Sep 02, 2008
5a resistors are all 120 ohm 1/2 watt use flame proof resistors.
check fuse f9a23 or f9a22
also replace knowen bad caps in this unit efecting convergence replace all 10uf @ 16v on the scan doubler module, ther are 8 off them.
make shure and check trace between Rg-8 and r705 for a open, sumtimes fulid from crt will open this up.
Posted on Jan 13, 2009
There are two and sometimes three very large IC’s that control the convergence in a big screen set. I think that you have two that are on the board in the center of the set. They are secured to a very large aluminum heat sink.
There are two ways to repair intermittent connections on the convergence IC’s. I usually remove the board with the convergence IC’s on them and then and solder the connections. The other method is to tilt the circuit board and solder them while still installed in the chassis.
If you remove the board and repair the connections, be careful to remember which connections need to be made when you replace the board. Mitsubishi uses a lettering system, so it should be easy.
If the problem remains after you have made the repair, it is possible that the pins on the IC’s have become loose. In this case the IC’s need to be replaced. I have seen this on several occasions.
If you choose to repair the set yourself, be very careful of the high voltage that can be stored in the capacitors, and CRT’s. This voltage can be as high as 30,000 volts.
I hope this information allows you to resolve this issue.
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Posted on May 29, 2009
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