I have this Sony Tv, model KV32XBR10 with mutiple problems. First, when turned on, there is one blue retrace line at the top of the screen and the rest of the screen is black. After a few seconds, the picture comes on blinking once per second or so. I adjusted the screen control up and the picture comes on but the retrace line is still visible at the top. If I turn the screen back down, the picture goes back to it's blinking.
On the CRT board, I shorted out R701 (series resistor to heater) and the result was the same. Also replaced the blue disc cap (680pF 2kV) to G2 and again, no difference. This set does not use the infamous CX1477AS jungle IC. Does it sound like the CRT is on it's last legs (IK fault)? I don't have a rejuvenator worth calling a rejuvenator- B&K 465) so trying to restore the tube is not a good option, unless the customer is gonna junk it anyways. Next, I thought I'd check the caps on the power supply board for high ESR. Good thing because I found a couple of bad ones. One, I am having problems replacing. It is C651, a 2.2uF 160V, 105 deg C. When I replaced it with another same spec but different brand, the set would fire up with HV but before the screen would light up, I could hear the HV shut off leaving only sound. Also noticed the sound pitch of the SMPS alter to a much lower freq. oscillation, so I unplugged before problems occured. Replaced cap with still a different brand and the set came on and ran ok but after 2 minutes this new cap was hot enough I could smell the plastic wrap on it. Put the original cap (very high ESR doesn't hardly register on my cap wizard) back in and the set runs fine and cap doesn't heat up. Is C651 a special type of capacitor? Should I just leave the original in and forget about it? Thanks for any help. -- Gary McCartney McCartney Electronics Guelph Ontario Canada Est. 1984 email: gary (at) number63.ca _________________________________________ Please include original text when replying to this email. Once you get your unit repaired, please post the fix to the group. Order your tech repair CD today, Version 3.0 only $49.00-more monitor tips-user friendly program. [EMAIL PROTECTED] www.tech-repair.net ______ Techs mailing list [EMAIL PROTECTED] http://intrepid-video.com/mailman/listinfo/techs_intrepid-video.com Go to the link above and scroll to the bottom to enter your email address
