Hi,
My Sony Kp51hw40 died yesterday while I was watching TV. It flashed green then turned off. When I tried to turn it back on it just turned back off(heard the relays clicking)
I 've read alot that the 6 blinks indicate that something may be wrong with the D board, but the service manual says to look at the A and B boards, and the +5V is shorted or overloaded.
From Service Manual:
1) +5 line is overloaded (A, B boards)
2) +5 line is shorted (A, B boards)
I tried to measure the +5V line on the A board, but the tv shuts down to fast to get a reading. I also tried to look at the +6V line that feeds the +5V regulator but had the same problem. My multi meter is not fast enough to catch what ever is going on. Is there a way to keep the tv on so I can get these measurements? I don't have access to a scope or I would use that to see whats going on there.
I also noticed recently that when the screen is black, like between commericials, or before I turn the cable box on, it has a slight red shade to it. Not sure if that is related. Other wise the picture was very good.
When I took the back cover off I could see alot of dust on the projector lenses, is there a special way to clean them?
Any help or advice is appreciated.
Thanks,
Will
The service manual says the following about 2 blinks:
Diagnosis:
+B overcurrent (OCP)
(See Note 1)
Probable Cause
• H. OUT (Q8024) is shorted. (D board)
• +B PWM (Q8035, 8038) is shorted. (D board)
Symptoms
• Power does not come on.
• Load on power line is shorted.
note 1:If a +B overcurrent is detected, stoppage of the vertical deflection is detected simultaneously. The sympton that is diagnosed first by the microcontroller is displayed on screen.
On a case like this, you can try to use a 150 watt light bulb across the main AC fuse, but make sure you do take out the fuse. to reduce the input voltage, as maybe this will give you the oppitunity to mease the regulation in the set. But if the horizontal output transistor is shorted, you will get a bright glow from the bulb. You will need to trouble shoot the individual circuits to pin it down. Good Luck