Need help! The ws-48313 was dead with a green light when I got it. immediatly thought it was the dreaded DM problem but when I opened the tv I found this model doesn't have a DM module. So I purchased a pdf file of the schematic and went to troubleshooting. This is what I have repaired so far. Found wasn't getting ac/on signal. Replaced on3131-r ic and 1s2076a diode and 2sc3311 transistor in power supply. Ok now have some power and green light now off. Micro was now running and came back with code 22. Next found -27v line dead and fuse for -27v line open. Another web site suggested that the convergence ic's probably shorted and needed replaced. Replaced ic's and also replaced feed resistors. Also replaced diode 31df2 and 150uf cap. Now tv tries to power up then shuts down when high voltage tries to start. Code now says 22 which is a xray protection fault. Checked the capacitors in high voltage circuit and found none checked bad with ESR meter. The b+ voltage of 208v is there for a couple seconds and then is gone. SAme with all voltages.
Any thoughts on what to look at next?
Thanks
Jeff
Oh boy, I hate those HV problems, I'm only a state away, wanna swap tv's or shall we just trash them?
Your problem sounds like a LV problem, did you monitor the HV, is it too high?
The Wichita Kid!
Double check the regulator voltage from the main power supply. These will cause the set to go out for over voltage and Over current as well as x - ray protection. Good Luck
I went ahead and replaced the regulator and the power supply caps in case I was missing something. Still have the xray shutdown.
Will the high voltage not starting up cause the xray shutdown?