Sony PTV Model # KP-46XBR25 Video blinking on/off about once per second

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 rm502@xxxxxxxxxxxxx

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