Question about Sharp Aquos LC-42D62U 42 in. LCD HDTV

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What is "OPC"? It comes up and goes away.

What does it stand for and what does it do?

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OPC_ Optical Picture Control
Automatically adjust the brightness of the screen.
You can change the settings in the menu option.
It's in Menu, then picture, then OPC.

OFF- The brightness is fixed at the value set in "Backlight"

ON- Automatically adjusts

ON: DISPLAY- Displays the OPC effect on the screen while adjusting the brightness of the screen.

If you don't want the silly display from popping up all the time, go into to menu and change the setting to ON; instead of ON: DISPLAY

Posted on Apr 20, 2009

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Hi, the OPC function is a automatic brightness adjuster.It automatically adjusts the brightness of the unit in real time. Its a very unique feature that is not installed in many units of this nature. it helps combat the unregulated brightness factors in many programs you watch on your LCD set.


Please rate and god bless:)



Posted on Apr 20, 2009

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My vizio tv has no picture but has sound BUT it started a few weeks before that where the screen got darker in a few spots and then eventually went all black.


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Try this first. Not sure, but most Vizio menus within the last 4 years should be close enough to navigate through. It's a little tricky to get to. You highlight picture, then you hit the right arrow to bring up the Picture menu. Go down to Advanced Video (one above Reset Picture Mode) and hit the right arrow again to bring up another submenu. Go down to Backlight Control. There are three options: OFF, DCR and OPC. Both DCR and OPC seem to cause a problem. Try turning this feature to "OFF" and see if the the problem goes away

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So when i turn on my sharp hd it turns off then the opc light comes on! Then the power light and opc light keep flashing!! Alls i want 4 it to work? Plz help


The television has gone into a coma. It is going to need to be serviced or replaced. The blinking code is a pattern. If you look at the power light and the opc light separately and independently, you can acquire the blinking pattern. Cover opc and look at power only. Note how many times it is blinking before it pauses. It might just blink steadily. Next cover power and look at opc alone. Note how many times it blinks before it pauses.

Depending on which model you have it might work if you leave the television unplugged overnight. The next day plug the television back in and wait for the blinking to start. Hold down the power button on the side of the television until the light stops blinking and turns red (usually right away). Let go. Press and release the power button once more and the light should turn orangish and then green. The television should turn on.

You can call Sharp and have a case file created and try and INIT with the customer service representative.

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Power light comes on for about 30 secs, something clicks and both power and ocp lights start blinking contineously. the screen does not light up


I have this model of the sharp tv.Happen to me very often the Power and OPC LED light indicators blink continueosly.Not the power supply board,it the Tuner board that take in the comming broscast signal that have the problems.You still can used this tv.Push the power button sometime the tv it will work right away.Not,each time POWER and OPC lights continueosly blinks.Just push the power button again each time the POWER and the OPC continueosly blinks.Just have push power button again about 4 times each time Power and OPC blinks recycles,it will finally show the backlight and picture come on.My guest,if u do this by pushing power button to recycles about 10-12 times each time the POWER and OPC blinks it time to change the Tuner signal board.

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1 Answer

What is opc


"OPC stands for Optimum Power Control (or Optimum Power Calibration,
depending on who you believe; the process is sometimes known as Dynamic
Power Control (DPC) or Direct Read During Write (DRDW)). Most CD-R units
do a power calibration test before writing to adjust the laser power to the
correct strength. Different brands of media and different recording speeds
require slightly different power levels. Too much power can create oversized
marks which can interfere with each other, and too little power can produce
undersized marks which, in extreme instances, can cause read failures.

The recorder reads a recommendation for the initial power level from the
Recommended Optimum Recording Power value from the ATIP (section (2-38))
on the disc. This is used as a starting point for a series of write tests
in the Power Calibration Area (PCA) of the disc.

Running OPC goes a step farther by actively monitoring the write process
and adjusting the laser power as needed. If the writer encounters dust or
fingerprints, the laser power can be increased to burn through the
obstacles. This is especially useful for discs that are moved around
between recording sessions, such as CD-RW discs or multisession CD-Rs."

See this:

http://www.gallagher.com/music/cdr.htm

Cheers,

Kevin

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You can purchase a replacement opc belt from most good stationary and consumable suppliers, however, be ready for a shock. the price of the opc belt is almost as much as the unit is worth.

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NOISE


My machine had the same problem. A service tech looked at my machine and pulled out the OPC Belt Drum Unit. The drum unit had a few issues: 1) jagged rips in it, something caused by running papers through that had staples or paperclips in them. So when the drum turns, it scrapes other parts and the machine sounds like its going to drop all its nuts and bolts--at least mine did!)! and 2) the spindles from the OPC unit has come loosened and fell off. The spindles and plastic cogs were found way at the bottom of the OPC Drum slot. This too was thought to have added to the rips in the drum.

I replaced the drum ($399 was the cheapest I could find) and the problem went away.

An expensive repair but for me it worked...

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