PCH521R is definitely different than the PCJ522R. The convergence and the audio board are together and stand up on the left side looking from the back. I can download the PCH521R from ServiceManuals.net but I thought I would check one more time on the list before I spend the $24.00. OK Here?s the lowdown. After changing all there STK?s and the 3A fuse in the P/S as stated in T/A tip. I set up the convergence to perfection and saved. After doing that I noticed I only had audio coming from one speaker. Being convergence and audio are on the same board I reached inside from the front to flex the board, I only assume I did this so I could hear if the other speaker came on. Anyway whammm it got me. That hurts. I don?t know where the high voltage came from but it burned a pin hole in my middle finger and a small mark on my pointer finger when I touched the audio IC heat sink. You can call me dummy I know I should have used a wooden stick. I could be wrong but my guess would be it has happened to all of us at some time or another. Anyway after that I pulled the convergence/audio board and resoldered the audio circuit audio came back on both sides but convergence was back to the way it was before I started. Question could the high voltage zap have taken out the 3 STK?s or do need to go to the power supply? I checked all the fuses on the power supply board and they are good. I do need the schematic for the PCH521R Sorry for the long post but I thought it necessary to tell all to get a good response. Thanks. Jerry Alpha 21 Electronics Granite City, IL 62040 618-452-8620 alpha21century1234@xxxxxxxxxxxxx GERALD GANN <alpha21century1234@xxxxxxxxxxxxx> wrote: Thanks Bill that?s why I ask I have the PCJ522R. The convergences board is definitely different. As long as the procedure or the same I can go from there. I did a PCJ522R awhile back and had to order a special remote to save changes. Thanks again. Jerry Alpha 21 Electronics Granite City, IL 62040 618-452-8620 alpha21century1234@xxxxxxxxxxxxx Premium Technologies wrote: Gerald, Almost identical, both are the same chassis, and the PCJ522R is on file in the members area... If you have any problems getting it I have it and I'd be glad to download it or sections of it that you need... Bill William Rayburn, CET Premium Technologies PO Box 442 Long Beach, WA. 98631 360-642-4993 ----- Original Message ----- From: "GERALD GANN" To: Sent: Tuesday, December 06, 2005 12:33 PM Subject: [TechAssist] Re: OK new question. Samsung PCH521R May need schematic. Convergence problem. OK new question. Being I got no replay on my first post. Can some tell me if the convergence setup is the same for this modal as it is for the PCJ522R? The schematic would still be great. Thanks. Jerry Alpha 21 Electronics Granite City, IL 62040 618-452-8620 alpha21century1234@xxxxxxxxxxxxx GERALD GANN wrote: Samsung PCH521R May need schematic. Convergence problem. Found this tip in T/A Garris TV, Make: Samsung, Model: PCH521R, Chassis APT51B, Problem: Convergence way off and unable to adjust, top/bottom bowed-in., Cure: Open 3A on P/S Module located on right side of chassis, this fuse protects the -26v going to all (3) STK391-020 Convergence IC's which are located on left side of chassis on large heat-sink. Replaced 3A fuse on SMPS board and replaced all (3) STK391-020 Convergence IC's on the Convergence/Sound board. Comments Before I change all three STK's, looks like a pain in the axx's. Anyone have any quick fixes? No leakage from tubes. Jerry Alpha 21 Electronics Granite City, IL 62040 618-452-8620 alpha21century1234@xxxxxxxxxxxxx ----------------------------------------------------------------------------- This Email List is accessible to the general public through search engines. 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