Question about Sony KP-61HS10 61" Rear Projection Television
I have the Same 5 blinks with sound but without picture. I was hoping one of the other posters with the same problem could tell me about their experience,,,,, What finally happened ? What was wrong? How much was the fix? How long did it take to get your set back? I hope all is well and that you check back for a follow up reply. Thanks so much.
· 5 times, Diagnosis: White balance failure (Not balanced) Possible causes: Video out (IC7101, 7201, 7301) is faulty (CR, CG, CB board), CRT drive (IC309) is faulty (A board), G2 is improperly adjusted. Symptoms of the problem: No raster is generated, CRT cathode current detection reference pulse output is small.
AKB is a color balance circuit. It stands for Automatic Kathode Balance and is used in the video circuitry to keep the white balance in the proper level when dosed with color signals that tend to saturate the video level.
It is part of the "jungle IC" in Sony sets and is very important to the overall function of the color processing system.
The repair probably requires some surgery on the jungle chip if not its replacement. Cost of repair could be anywhere from a few dollars to $200 for the new chip.
It will require a service tech with good experience to know about this function, which is quite esoteric in tv engineering principles.
The only suggestion I have before you call in a tech is to do the hard reset (unplug for at least 4 hours) and the vibration check for loose connections or cold solder joints (by whacking the set with your hand or fist with enough force to vibrate the connections inside for bringing them back to life).
Posted on Dec 20, 2007
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