Question about Sony KDSR50XBR1 50" Projection HDTV

3 Answers

Sony SXRD KDSR50XBR1

My set is 2+ years old and started malfunctioning 2 weeks ago when when power was applied... green lite switches to flashing red after an instant display of video. Unit was shut down then re-powered 2-3l times , (sometimes only once) video then came back on for the entire evening. Now when power is applied, green lite flashes (15-20X), then turns to flashing red (4 X) cycle), no matter how many times I re-start. Please advise.....Thanks

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  • NAUGY57 Jan 18, 2008

    Replacing the projection lamp was never so easy......I am curious to know if there is any data on the expected life (in operating hours) of the XL-5100 lamp

  • Anonymous Feb 21, 2008

    I have the same problem and a Sony Tech came out and said that it is a FAN issue. Says I need to replace all 4 fans. $150 in parts and $400 in labor. I want to try and tackle it myself to save the $$$. Would love some advise if anyone on here can provide it. I know that Sony sells the service manual for $45. Anyone know where I can downlaod a copy?

  • mcdonoughc Sep 30, 2008

    I've got the 60" version of this TV.
    Had the blob problem.  Got that fixed.
    Had the lamp burn out.  Had to replace that.
    Now after about 4 minutes of TV watching, the screen goes blank, the green light flashes about 50 times and 1-2 minutes later the screen comes back on.
    Thanks in advance for any help.

  • mikeymike078 Jan 20, 2009

    I've tried everything listed ,here, and still have the same issue. Does anyone happen to have the part numbers for the fans in question?

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I have the answer for the fan issue on the KDSR50XBR1!!!!!

Ok, I think I have the answer for the BIG FAN failure. I recently did a similar fix on the spindle of an xbox 360 and it is identicle. Ok, this is an EXTREMELY EASY FIX...

Open the back of the tv, locate the large fan (on the lower left on the back of the set.) unscrew the screen and remove the fan.

Once the fan is removed, you will see the side with the model number and the other side is totally open.

On the open side, pull...

The fan will come off, into your hand, it is only held by magnets...

You will notice a spindle on the fan and the other side has the magnets and the hole where the spindle came from (this is the fan motor).

Clean both the spindle and the hole (motor) with a q-tip. The hole is smaller than the q-tip, but do the best you can to remove the old lubricant.

Get a bit of WD40 and lubricate the spindle and spray a touch in the hole.

Put them together, reconnect your fan, test it on startup and thank me...lol...

HOPE THIS HELPS!!!! IT WORKS, TRUST ME...

What do you think? Spread the word, lets save some folks from spending needlessly...

Posted on Oct 07, 2008

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I get the same problem (4 flashing red lights).
I done some internet troubleshooting and narrowed it down to an overheated power circuit card/fan issue.

It turns out one of the fans is failing and will not rotate at the appropriate speed to cool the power circuit card, this will kick out the 4 flashing lights from the diagnostics.

In lieu of replacing the fans I have a temporary solution:
For my TV (kdsr50xbr1) the fan in question is located on the far left side (facing the rear). You will see a grill on the back of the TV showing you where the fan is located.

First, get a can of compressed air and blow it into every fan. This will clear away a lot of dust and help the fans move easier.
There is one blower type fan located inside the TV, remove the back panel and look for a tall yellow circuit card just to the left off the center of the TV. Behind that card is a blower (stands upright looks like a tube). Blow air into that blower, you will see a lot of dust come through the duct and out where the large fan in the center is located.
Put everything back together. and provided the fans aren't too far gone the TV should be working again.

Also, if the issue comes back, try this:
When you turn on the TV, shoot a short squirt of compressed air into the fan (Far left facing the rear). This will give it a kick start and bring it up to speed.

It is important to note that the compressed air cans do contain a liquid and as such are not compatible with electronics when they are plugged in. Try your hardest to keep the can upright and not allow the liquid to squirt out where it shouldn't. If it does it will evaporate in a few seconds.

Ok, relatively long post, to summarize:

1. Open back of TV, blow compressed air into every fan to clean them.
2. Blow air into whichever fan is causing problem if it happens again.
3. Keep the can upright if the TV is still plugged in. Don't sue me if you fry your TV.
4. If this doesn't work (has for me) replace fans


Posted on Jun 19, 2008

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The red light flashing 4 times is for the internal fan malfunctioning

Posted on May 03, 2008

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Posted on Jan 02, 2017

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Sony KDSR50XBR1 50 black screen, no faults! Lamp working, fans OK Sony KDSR50XBR1 50" HDTV: The light engine was working fine before the fan quit starting on it's own. After disassembly, cleaning and lubrication of the fan, I have no errors but the input display or menu options will not post on the screen. The lamp is on but seems to either be projecting a solid black picture, or not be at full brightness and there are no faults. I have a solid greed LED on top, but can get no picture. Sound is fine. What should the lamp voltage be at operating mode? I have tried reseating connectors and pushing on the wires to make sure the connectors seat. This is baffelling because the lamp fired fine for 1 second before the stuck fan issue was corrected and I have no faults now after lubricating the fan. I'm going to check connectors again today as a triple check; as I did remove the power supply. The TV has been reset per instructions in the book. Any advice would be much appreciated but I cannot believe it's the OB as it worked fine before the fan quit and it's about 14 months old. I'm thinking something may not be assembeled correctly, but everthing seems to be pretty idiot proof for re-assembly. Also the menu or input banners will not post. I have 2 new lamps, so it's not that.It seems to be stuck in somne black screen mode. The large fan does start by itself now after cleaning and lubrication, therefore no fault blinks. Please help!!!

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