Larry had this happen once on a Sony Projo. When my tech replace the STK?s he had to chisel them off with a small screwdriver and gouged a grove in the aluminum chousing a burr. Lasted 3 months. When changing STK?s again he realized what he did. Filed off the burr reapplied heat sink compound, it has been a year and a half now no problem. poor heatsink thermal Jerry Alpha 21 Electronics Granite City, IL 62040 Ph. 618-452-8620 Fax 618-876-5157 www.alpha21century@xxxxxxxxxxxxx tvtech <tvtech@xxxxxxxxxxxxx> wrote: check the caps there ususally yellow and small 1 micro 50 volts good luck pete ----- Original Message ----- From: "Shoreline Electronics" To: Sent: Thursday, October 07, 2004 9:31 AM Subject: [TechAssist] Re: Sony KP61XBR38 repeat STK converg. IC failure > Probably just a bad batch of STKS...or poor heatsink thermal transfer. > They > do run quite hot > > ================================= > Jeff Stielau > Shoreline Electronics Repair > 344 East Main Street > Clinton,CT 06413 > (860)399-1861 > (860)664-3535 FAX > jstielau@xxxxxxxx > ================================= > ----- Original Message ----- > From: "Larry E" > To: > Sent: Thursday, October 07, 2004 10:16 AM > Subject: [TechAssist] Sony KP61XBR38 repeat STK converg. IC failure > > >> Hi Guys, Went out on this Sony projo yesterday, customer showed me >> receipts that >> she has had the STK4278`s changed twice in this set almost exactly one >> year apart, >> picture has the usual vertical bow and misconvergence. I checked my >> notes and have >> nothing on this set for repeat convergence problems, all the resistors >> check good, >> solder is good on bottom of board, no dark burnt areas on the board, The >> only thing >> I can see wrong is the price the shop in Tennessee charged her for the >> STK`s one >> year ago, $32.00 each, this seems a very low price for OEM Sony parts so >> they >> might be generics and there just not holding up???? Anybody got any tips >> or prior >> experience with this problem ? tia, Larry E >> Larry Eastman >> American TV & Electronics >> Crystal River, Fl. 34428 >> >> >> ----------------------------------------------------------------------------- >> Lost Password: >> http://www.tech-assist.org and select "Login Problems?". >> Email Archives: >> //www.freelists.org/archives/techassist/ >> > > > ----------------------------------------------------------------------------- > Lost Password: > http://www.tech-assist.org and select "Login Problems?". > Email Archives: > //www.freelists.org/archives/techassist/ > ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/ ----------------------------------------------------------------------------- Lost Password: http://www.tech-assist.org and select "Login Problems?". Email Archives: //www.freelists.org/archives/techassist/