Riddled TV Repair Forum

Steve · Guest

This Rear projection TV has gone over its expected bulb life. It has over 2k probably 3k hours on it as an estimation. Does the bulb deterioration often exhibit a blue dominant discoloration along the bottom center of the screen that is always there but pronounced/isolated when the B&W image displayed (turned color down). It is like a blue slice of a semicircle at the base of the picture most pronounced at the center. Anything anyone has seen with this gigantic LCD TV. Maybe the bulb is the only problem or is one of the LCD panels aging?

Google

DeWayne · Guest

You have a defective light engine.

Terry · Guest

Did you remove the diffuser and checck for spiderwebs etc?

Terry

Hall · Guest

THERE IS A FREE EXTENDED WARRANTY FROM THE FACTORY TO REPLACE THE LIGHT ENGINE THROUGH FACTORY REPAIR CENTERS. PART IS $800. OR SO WHOLESALE BUT SONY WILL PAY PARTS AND LABOR CHARGES .

Rick · Guest

This model uses a different chassis then the
XBR1's use which Sony has extended the
warranties on...
So your saying this model as well has the extended
warranty on that optical engine..?

This model has a different optic assembly
then the XBR1's have...

The KDF-70XBR950 was issued in 2003
and the KDS-R50 / 60 XBR1's were issued in 2005

KDF-70XBR950...Chassis type # LA-2A

KDS-R50 / 60 XBR1...Chassis type # SP1

The SP1 Chassis has the extended warranty for sure
I was not aware the LA-2A was though...

This is good to know....
The lamp in this unit is a A-106-034-B
which is good for more than 2or 3 thousand hours..

It is more like 6-8 thousand hours...average...very popular
lamp XL2100...2,000 to 3,000 hours is not
real high...for this lamp

Good Luck ....with the engine....
it sound like that is the culprit...
becareful if you pull apart to clean those
lcd's.....it might help and actually work..

It will save you the cost of the engine...

see ya....

Google

Steve · Guest

No, I removed the lamp and saw no noticeable dust or opaqueness in the light path. How do you check the diffuser? Remove the entire engine? How can one procede to quote such a job and be able to make some money even if the Lamp is replaced? I see some difficulty with the certainty of helping the customer and making money. Any ideas? Is it easy to check the diffuser on this model?.

Rick · Guest

No....its not the lamp
It is the optical LCD engine at fault here....
This is one of many symptoms of these sets...

Sony did a really good thing on their new models
They have incorporated a set of internal test patterns
to make troubleshooting the LCD engine defects dam near
an exact science now...

I had a newer model about 2 weeks back with a blue arch seeping
up from the bottom and I brought up the internal
graphic patterns and I was able to determine with out
a doubt it was the optical engine..

So when I called Sony to confirm my findings he was
was ranting and raving about me using the internal
patterns for troubleshooting he was tickled to death
and said:

" That is exactly why had done this so it would make
troubleshooting the engine easier..."

He called me a " Good little technician " and sent me
on my way..

It is in your optics that is for sure....

Some techs have good luck on taking these apart
and cleaning them...I change them because I do
mostly warranty.....repair...

PS
I studied that dam Sony training guide over and over
and over...for all their new models...

...The more you work on these sets and the more you study and read
even reading post on here you will get good with these sets...

Every tech on here has access to this info and can repair these sets
In time you will know the difference in a
optical engine defect and a non-optical engine defect...

The only reason I mention any of that stuff above is to let
it be known that you will in time figure these sets out
and you will look at a symptom and have a good idea
already mapped out on what the problem is...

see ya...