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I STILL would rather work n a JA module set.....than ANY SG_613 or such Sony NIGHTMARE. SMPS supplies are "old hat" to me by now--since EVERY flat-panel set uses them...I see a LOT of them..and usually have GREAT success fixing them. The JA is pretty normal in the SMPS design--other than the fact that is uses an NPN transistor for the Switch-out transistor instead of a MOSFET..as nearly ALL SMPS units do now.. And locking to the horiz. rate for SMPS operation was done in a lot of sets, during the CRT era..
But those Sony SG sets...HATED them.. You would spend a lot of time getting the horiz. ckt repaired..regulator replaced and such..power it up and BOOM !! ALL of it was gone in a quick FLASH. and I do NOT think a variac was of much help...either. And sometimes...they would work...and you would THINK all was well...and then BOOM.
Best thing for the SG sonys''....a packer truck !!
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