Sanyo DS27910 Problem: hit by lightning, Q 601, 604 and 605 all shorted, can't seem to find anything else. ================================================= Courtesy of Jeff D. fix for the 19" version.... Check the 150v zener near the HOT. Before powering up, place a 100w light bulb in place of the fuse. If all is OK, the bulb will glow normally. Also, I think I had an open resistor..but that info is at the shop. ================================================= Courtesy of John.
Sanyo DS27910 That model is listed in Sams # 4741 and 4762 (yes, the exact same model in 2 different sams) and that power supply is the same they have used for a couple years. The PS schematic is the same as in Sams 4339, 4355, 4363, 4375, 4385, 4393, 4404, 4411 and others except the layout is different on the new ones. The only problem I have seen in these is shorted transistors, just check them all, Q601, Q604, Q605, Q635 and Q695. The power supply should run at 2/3 normal outputs when you plug it in. Short Q693 base to cold ground to force on full if it does not turn on. Always change all the bad transistors at once or they will self destruct. Q601, the output, should be a C4423. You can use others or an NTE for test purposes but they will overheat and fail in a few days. Be sure to check Q604 for short B to C, if it is the output will be very high. ================================================= [EMAIL PROTECTED] From: [EMAIL PROTECTED](walter�wood) Date: Mon, Dec 13, 2004, 11:32am (EST-3) To: [EMAIL PROTECTED] (Techs) Subject: [Techs] Sanyo DS27910-- Hourglass shape Reply�to: [EMAIL PROTECTED] (ELECTRONICS PROFESSIONALS LIST) ================================================= Customer brought two sets in after lightning.Kept this one, as it still played because it was their only set, and was watchable. I expected to find a bad main filter cap, and proposed to give one day service. They brought it this morning, but it appears to be a pincushion problem rather than a power supply problem. Picture is bowed inward in the center(horizontal) about an inch and a half on each side. This is a flat screen. Any help, while I wait for the manual to come in?? TIA Walter ===== Walter Wood United TV Service 501 Poplar St. P.O. box 602 Pulaski Tn. 38478 mailto:[EMAIL PROTECTED] ______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com Joes....Electronics �(Joe:Tech/2004) [EMAIL PROTECTED] Fax::509-479-2283 _______________________________________________ Tech Repair CD...order your just $49.00 plus shipping...One year of updates free. www.intrepid-video.com www.tech-repair.net Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com
