Question about Sony FD Trinitron WEGA XBRKV-40XBR800 40" TV
The problem is on the 'A' circuit board. It is the IC504.Or, it is a low voltage drop or a short. Replace the "A" board. It is the front board on your right when you are at the rear of the set when you remove the cover. Look it up on the net. PS Don't touch the chassis while it is on...HIGH VOLTAGE !!!
Posted on May 17, 2014
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Posted on Jan 02, 2017
Toss the Sony set and purchase a Panasonic Plasma. I have the same set with the exact same problem. Was told by a local repair shop that the high voltage module was to blame and that it is obsolete. I called the Sony repair center and they confirmed that the module was obsolete, but they can repair it for between $500 and $700. I set up an appointment with the technician and he canceled the appointment and never followed up to schedule another appointment.
I WILL NEVER BUY ANOTHER SONY TELEVISION AGAIN!
Posted on Apr 06, 2008
Hello,For model KV-40XBR800,
Pls check following area.
Low HV Shutdown:
On the D Board.
Check IC8004/pin 7 should be 7.4v.
Check IC8006/pin 2 should be 2.5v if lower will trigger shutdown by causing pin 1 to turn on.
Check IC8006/pin 3 reference voltage 2.2v.
IC8006/pin 1 normally at 0v. If high
turns D5007 ON which turns the latch circuit Q6532,
Q6530, and Q6527 ON and turns the AC relay RY6501 OFF.
And NOTE: 6 blinks also can be Low B+ protection.
Unregulated 7.5 v from the power supply to 5v reg IC504 on the A Board. 5v to M Board Q2314
to CPU IC2300/pin 43. If 5v missing set will shutdown with 6 blinks.
Posted on Oct 15, 2008
have over 10 years experience in electronic tech
I know this isn't what you want to hear, but the problem you've described can't be fixed with troubleshooting. Your TV will have to be repaired. There is a part that has developed a defect and needs to be replaced. If you're still in warranty, the TV will be repaired at no charge to you. The warranty would likely be at least one year from the date of purchase from the manufacturer. If you purchased an extended service plan they will repair the TV at no charge as well.
If the TV is no longer in warranty, it will likely cost a minimum of $150 parts and labor. This is assuming that you only need one circuit board or small part. If the problem is more than one of the circuit boards, the price of repair could go much higher.
I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. Please be sure to vote on my response. I hope I've earned a good rating from you today.
Please let me know if I can be of further assistance.
Posted on Jul 11, 2009
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