Question about Mitsubishi WS-65809 65" Rear Projection Television

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Concave picture. Where in the TV I locate the IC STKs, That I may removed them and resolder them.

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If you remove speaker grill in the front you will see a wood board in the center(six screws) take it off and you will see 3 picture tubes and in the back you will see 3 boards.the center board is the one that you are looking for.You wll see big metal heatsink in the center and underneath the ics you are looking for. you would need to work from the back there is in not much you can do from the front.( make sure tv is unpluge before doing anything.
hdtvman..

Posted on Jul 01, 2008

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Picture went from normal to single lne, then not at all ,have power still have sound


You will need to locate the vertical IC. For some reason the location is prefixed with the letter q. Q in this case refers to a transistor. In any case I believe the location will be Q301. It has been a long time since I have repaired this TV. If you find the vertical IC (I think it may be the LA78XX series IC), you will need to resolder the 7 or 9 pin IC. The cross reference in the NTE electronic book may be the NTE 7158. If you can find this number in the NTE semi conductor book (will have picture and schematic info),you will know what to look for. In the case you resolder, do not short pins with excess solder. You will also need to replace any capacitors that are near the IC. There should be a 35 volt 2.2Mf cap at 105 degrees, this will be bad. Remember this may be all you have to do. Please check the capacitors in the immediate area of the IC. May be three more caps to check. In all, the location of the IC and capacitors will be in the center and a little closer to the rear of the main board. Inspect the rest of the board for bad grounds and resolder as necessary. Also check the small board behind the CRT, it will have areas to resolder. Hope this helps. If you feel you cannot do this, find a electronic enthusiast. Show them this note. This note will save you a few bucks. Knowlege is a great money saver. Thanks for asking me and show all hands of support!

Aug 31, 2011 | Toshiba 32A60 32" TV

1 Answer

NEED TO ADJUST VERTICAL PICTURE


Replace capacitors CX2105 (35 volts 220 Mf), CX2110(35 volts 100Mf), C2104 (50 volts 1 Mf), resolder resistors RX2115, RX2116,R2118,R2119. You will need to also resolder the vertical IC. I think this IC location is IC 2200, its been sometime since I repaired this one.Do not short the pins together with excess solder. The values on the cap may not be exact. Please use the cap value that is removed (remove and replace one at a time). The locations will be correct! This will remove the horizontal lines or bars across the TV screen. You may as well replace capacitors in the horizontal deflection area. By now you have bad caps there. The locations and values are, CX3218 (160 volts 2.2Mf), CX3205 (16 volts at 100 Mf) CX3413 (50 volts 22 Mf) and CX3416 (25 volts 100Mf). Thanks for asking and show all hands of support.

Jul 14, 2011 | Zenith B25A02Z TV

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Picture appears concave and shrunken and pulses in size


Replace Both of your STK convergence ICs STK392-570 If this is not number on your s use what it has on them. you can call MATs 1-800-628-1118 o Main STK is what is going bad when IC goes out all together TV will shut down and will not come on. So replace BOTH STKs ASAP! you will also need Heat sink compound to put on back of New ICs.

Aug 19, 2009 | Mitsubishi WS-55511 55" Rear Projection...

3 Answers

Projection TV, Sound but no Picture


If this Tv is a model year 1996 or 1998, It is quite possible your vertical IC needs resoldered. It is located on the small signal board. This board [quite large anyway] is the board on the left. I don't know the location off hand. The IC has seven pins and located on a heatsink, It is a TDA series. Resolder any and all grounds you see. May as well get the Large Signal board [On the right] resoldered. The other problem would be the P I P board, a small board standing up, that can be removed and replaced. But try the earlier first. This is tedious, but will produce results.

Jul 12, 2009 | Mitsubishi VS-5059 50" Rear Projection...

1 Answer

Colours serparated, not converged, screen looks concave


Replace Both fo your STKs convergence ICs STK392-040s. For Parts Call 1-800-223-3205

Dec 30, 2008 | Samsung HC-P4741W 47" Rear Projection...

1 Answer

Should i have this fixed or buy a new tv?


OK LOOK IN YOU STK RESOLD YOU IC STK AND BE FIX

Dec 29, 2008 | Sony KP-46WT520 46" Rear Projection...

2 Answers

51mp392h/17


You need to replace your STKs Big black ICs 392-020 replace both of them also check 2 resistors 2,7 ohms they may be open.this is a common repair iob.

Nov 02, 2008 | Philips Magnavox 51MP392H Rear Projection...

1 Answer

Convengence problem?


the stk ic . the big amp chip has cold solder joints . resolder the ic

Nov 30, 2007 | Mitsubishi WS-55857 55" Rear Projection...

1 Answer

No picture, but red light on front comes on


If one your convergence IC's is bad then you will still see a picture but the colors will not line up, especially around the edges. I have never seen a Toshiba projection set completely lose the picture because of a defective convergence IC. If your vertical output IC has failed or cracked loose then that is exactly what you will see - no picture! The vertical output IC is usually on the same board as the convergence outputs which explains why it worked last time, even if the tech was not 100 percent accurate in knowing exactly what was wrong - he just changed everything. Resolder that vertical output IC and make sure it is getting power. If you still have no picture after that then have a qualified tech look at the set.

Jul 12, 2007 | Toshiba 46H84 46" Rear Projection...

1 Answer

Rear projection tv


This sounds like the solder joints have cracked on one of the convergence IC's or the IC itself has gone bad. First determine which color has shifted inward on the left side (let's say red)and then find which output IC is labeled with that color and an H (RH) and resolder or replace that IC.

Jun 27, 2007 | GE 46GW 948 46" Rear Projection Television

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