Question about Projection Televisions
SOURCE: power button flashing red
stk convergence packs may haqve failed in the dead short mode stk392-110 removing them from circuit may allow the set to turn on again good possibility do you know how to solder?
Posted on Dec 09, 2006
Just my coment THis tv has a complex system that include a digital signal porcessing in a high levle technology to show a good performance, i myself work on the development of that model, we was thinking we are best, for improve that many eng. dedicates almost all life to have that technology in our rooms, I offer my apologize for that but many eng dedicates all year 18 hours a day to fix that, thanks
Posted on May 13, 2007
it is important to count the number of red flashes, if it is 5 then the lamp ballast board has failed, (part #1-468-798-14) if it is 4 then the optical block fan (# 178706511) is probably to blame, if it is 6 then the thermal fuse has gone bad..(# a1137954a)
Posted on Nov 29, 2007
You can purchase the lamp supply thru "Encompassparts.com... The cost is $100.00, there is a $250.00 core charge on that module, so when you return the old they refund the 250. Initial investment will be 350.23 then take the 250. off that. That will be the end cost.
Part # LSEB3087A
Posted on Apr 16, 2009
hello it will flash if the bulb is not securely fitted and make sure the front cover is fitted securely as well
Posted on Jan 22, 2010
Discharged Flyback Transformer. Removed main pc board from bottom of TV and flipped over, no apparent damaged components or blown board traces were found. Noticed a lot of flux in various areas on the board that seemed unusual (maybe TV was worked on before as I bought a showroom demo at Circuit City). Used a plastic screwdriver to remove all flux between connections on ICs, Transformers, Flyback Transformer, and various other components. Cleaned all debris, dust and crud accumulation (TV is over 10 years old and there was alot around the Flyback Transformer) from both sides of board using a lightweight paint brush.
Used a magnifying glass to check all solder joints for possible cold solders and found none. Did the same for Power Supply Board. Checked various ICs and Power Transistors for opens or shorts (in machine) and they seemed fine. Reinstalled boards, said a few Hail Mary's and fired it up.
The protector Led no longer flashed under power and lo and behold I got picture and sound!
I cleaned the lens on the projectors (again 10 years of dust accumulation) did a magic focus adjustment and it works fine!
After reading other fixes, I fully expected it to die after 10 minutes so I left it on all day and against all odds it still works.
What was the fix......Dirt buildup on and around Flyback and other components,,,,,,Flux conducting electricity between contacts on Flyback and other components.....or oxidation on connectors between Power Supply and Main Board.....I don't know.... all I know is that for the moment I saved around $ 300 - 400 in repair bills by doing it myself.
Posted on Feb 02, 2010
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