Question about RCA D52W20 52" Rear Projection HDTV-Ready Television

Blows damper diode after few hours

Blows damper diode after a few hours or sometimes a day or so. Caught it once heard a snap and lost convergence due to shorted damper diode sides also pulled in. Think I have a bad crt or leaky divider block?

Mike Cutty Oct 09, 2007

was a bad deflection yoke was a bad deflection yoke

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1,694 Answers

Snap,then problem is usually bad flyback. Part # 259296.

Posted on Oct 09, 2007

Vista Electronics Oct 09, 2007

Note:use OEM quality or better diode for replacement.T.

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the flapper damper valves are stuck.
due to
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2: cable not attached at either end.
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2007 equinox blows only hot air when vehicle is very hot.

It may actually be possible that the damper is sticking due to heat based deformity until air flow of any type purges the excessive heat.

That could be due to a manufacturing defect or worn hinge points.

You may get a better feel for how the dampers are working by calibrating the HVAC control;

1. With ignition ON and engine not running, press AC and Recirc 3 times in under 2 seconds
2. Verify AC and Recirc LEDs flash, wait 15 seconds for the re-calibration to complete, you may hear the damper doors cycling while calibration occurs. If audible movement is heard, listen that no dragging occurs during that movement
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Is this a GMC or Chevrolet? If so what Year? The most probable cause of this condition is one or more Damper Stepper Motor failures. These are prone to failure due to the Manufacturers failure to spend a few more pennies for Premium Quality devices. The replacement is often very costly due to the location of the one most prone to failure is located on the top of the Plenum which requires a technician several hours to replace.

If only the drivers side is affected and the passengers side has full control it could be the Dual Control module is defective. These are far easier to replace and less costly.

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try to look for the power supply area, it is found on where the main plug is connected check if there are busted fuse of shorted parts,, the "clicks that you heard are the relays. relays are loosing out of supply because of a shorted parts like transistor or diodes or sometimes loose connection. Parts description are found in alldatasheet.com for you to know how to test the parts that u suspect

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WILL START DRIVE A FEW BLOCKS , THEN SIT 5 MIN GO TO START AND WILL ONLY CRANK CHECK FUEL FUSE SOMETIMES BLOWN OTHER TIMES NOT HIT TANK THEN MAY START , MIGHT TURN OFF AND THEN MAY BLOW FUSE, REPLACE FUSE...

for 1 fuse blown evry so often then you must have a short somewhere, the fact that it will crank and not start is most likely ur fuel pump , had the same issue with getting fuel to start or keep car running, possible that short could be by the fuel pump, the fuel pump is located under the rear seat and if im not mistaken it is on the drivers side rear

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Hello,
All you need to do is to open the back cover of the television to check for dry soldering and bulged capacitor, if found replace with appropriate parts.
You need to check the output voltages of the power supply to see which one goes off. It may be due to short circuits some where.

Good luck in solving the problem.....

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1 Answer

While running, heard a "snap"

This is probably a shorted high voltage rectifier diode. See this link:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)
We have the service manuals you need and have uploaded them here and here to help you.
You can find links to helpful exploded view diagrams and part ordering help here.
I recommend that you bookmark that link to your favorites.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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OK., I know this set very well. It almost never has a convergence problem.

With the set unplugged, remove the back cover--there is a small circuit board mounted ABOVE the main boards--it is about 10 inches wide and 4 inches tall---On the far right side of it are several DIODES---two are much larger then the rest--what usually happens is one of the large diodes is shorted--5 dollar part---the board only has a few plugs and 4 screws that hold it in---easy to remove--check all the diodes(the two large ones first)

If either of the large diodes read like a fuse you FOUND YOUR TROUBLE.

LET me know if you need ANY help or Advice--I am here to help people---I have seen several sets identical to yours with the problem you describe.

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Blows damper diode after few hours

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Blows damper diode after few hours

1 Answer

Vista Electronics

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Anonymous

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