Thanks Joe; Nothin' much in any of my data bases on this chassis. I did receive a manual, and saw on page 10 a service menu adjustment for the pincushion. I'd hoped for a corrupted eeprom or something, but no such luck. All 4 premiters will change completely through the entire range, according to the numbers but the picture doesn't move at all. Walter --- Joe Tech2004 <[EMAIL PROTECTED]> wrote:
> 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 > ===== 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
