Hello: I have a Sony PTV Model # KP-46XBR25 DOP 9/93 in my shop which has an intermittent video problem. When the set is started up from a cold start, the raster is black for about two minutes. Then, the video appears and disappears to black at the rate of about once per second. If I adjust the screen voltage pots slightly up or down (Especially the blue) the blinking on and off will slow or stop completely - but the adjustments to do this throws the gray scale off to an unacceptable tint.Also, the blink rate seems to vary with scene brightness. I have seen similar symptons in late 90s Sony 27-32" Table model sets which had a problem with the screen voltage setting on the flyback being critical or the CRT emission too far off on one color. I read something on the Internet about another XBR Sony having a problem with Capacitor C1737 on the "D" board. The audio and delction and tuning on this set are always fine. I would appreciate some tips, list of parts to check, or scans of some service data on this model. Thank you!
Robert McPherson McPherson Electronics Telephone (502) 367-9324 Cellphone (502) 298-6997
Email snipped-for-privacy@bellsouth.net