Question about Hitachi 51F500 51" Rear Projection HDTV-Ready Television

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SCREEN IS DARK - IF FULLY INHANCE ALL ADJUSTMENTS STILL BARELY ABLE TO SEE - ON THE ADJUSTMENT THE SHARPNESS ADJUSTMENT DOES NOT LIGHT UP

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  • cove creekk Feb 08, 2008

    i can't get the manual convergence to work properly - the lines won't turn white - now the equal bars won't turn red blue white - the red won't show up now

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  • Master
  • 4,402 Answers

Ran a magic focus once do you get an error?

Posted on Feb 08, 2008

  • Cary Farah
    Cary Farah Feb 11, 2008

    Sounds like the convergence chips are bad or loose connection.

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My sharp 32c540 picture is dark since i bought it brand new 6 years ago.


You may just have to make a different kind of adjustment.

This is what is called a direct view or crt type TV.

Inside on the main board (see attached photo) is the "flyback" transformer.

Note the two little controls embedded in it----top one is focus--leave it alone.

Lower one is SCREEN and a very slight upwards or right adjustment will bring the overall brightness up.

You want to adjust it just till with brightness on set all the way up you have a normal picture.

Too much and you get excessive brightness and trace lines and or further too much shuts set off.

Some sets have two holes in back of cabinet and small tool can get in and adjust the LOWER or screen control and others the back has to be removed.

Lay set face down on padded surface, remove back screws and set upright---do not touch anything inside with set on when you make the adjustment--control is plastic and a plastic tool a good idea--I have used regular screwdriver but know what not to do.

Let me know if you have questions 98% chance just need the Master Screen bumped up a little bit.

Mar 11, 2012 | Televison & Video

1 Answer

Red Lines through picture when screen is dark, back ground has a red tint. On my 48 "Sony Rear Projection" TV


You can try adjusting the Red color output. (Very touchy adjustment)

If you take off the front cover/speaker cover, there should be a access panel. Behind that, there should be a small square black box with 6 screws on it. This is the focus block. (At least this is where most of them are located)

It sounds more like you may need less red in the mix. There is a screw for each color. R, G, and B. Do not mess with the focus screws, just the ones labeled 'SCREEN.'

Go to an unused input where the screen should be dark. Barely turn the red down in a dark room so that the red spot is at the same level as the Blue and Green.

Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn any of these up too high or damage may occur and the TV may detect a short and shut off.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful.

Apr 19, 2010 | Sony KP-48S75 48" Rear Projection...

1 Answer

Picture is very blue most times.This is a light blue, but makes viewing difficult. Also before this issue came about, you could see a faint set of arcing lines running across screen especially when screen...


You can try adjusting the Blue color output. (Very touchy and dangerous adjustment)

If you take off the front cover/speaker cover, there should be a access panel. Behind that, there should be a small rectangular black box with 6 screws on it. This is the focus block. (At least this is where most of them are located) If there is no front panel, It may be located on or near the flyback (High Voltage) transformer on your model accessible from the back instead.

It sounds like you may need less Blue in the mix. There is a screw for each color. R, G, and B. Do not mess with the focus screws, just the ones labeled 'SCREEN.' They may have silicone over them to prevent them from moving. If so, you will need to remove it and put more on when adjustment is complete.

Go to an unused input where the screen should be dark. Barely turn the blue down in a dark room so that the Blue spot is at the same level as the Red and Green.

Use an insulated screwdriver and DO NOT TOUCH the focus block and ESPECIALLY NOT the back of it.
Very HIGH VOLTAGE. I found that out the hard way.

Do not turn any of these up too high or damage may occur to the tubes. If you turn them up too much, the TV may detect a short and shut off. this is a normal fail safe. These only need VERY slight adjustments.

I have found that if the three colors are adjusted in a dark room to where the 3 color spots (R/G/B) are just barely visible on the screen at equal levels, there is a pretty good color balance.

I hope this helps! Just be careful. Once again - LETHAL HIGH VOLTAGES ARE PRESENT WHEN UNIT IS ON!!!!!!

Apr 19, 2010 | Sony KP-65WS500 65" Rear Projection...

1 Answer

Dark picture


Hmm my dad's old t.v. just cut out on him it took awile to turn on this my be the end of ur tv so this might be a power problem but older t.v. loose there colour on the screen my uncle had a like 10-15 year old t.v the screen was like green when it was light but when u turned of the light or closed the blind's it's picture was ok so try that.

Feb 02, 2010 | Hitachi 53FDX01B 53" Rear Projection...

1 Answer

I cant get the color right. its to red??? any help? i did notice with the back cover off, there are 6 adjustment screws


yes! those are the screen and focus adjustments. 3 for screen, 3 for focus. try this. go in menu....turn down color, brightness, contrast all they way down. you should then have no picture, but in your case a little red. then go to back of tv and turn those 3 screen adjustments all the way down. slowly turn the screens back up until you get barely a picture. because remember, your brightness and contrast is all the way down. the picture should be dim but seeable and with red, green, blue adjustments, make it a black and white picture. when balanced..... turn up color , brightness, contrast in menu. enjoy!

Nov 14, 2009 | Philips Magnavox 9P6034C 60" Rear...

1 Answer

Hitachi 50ux22b has dark screen and general CQ adjustment issues


is the convergence off?
bad convergence amp ic's
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Jan 05, 2008 | Hitachi 50UX57B 50" Rear Projection...

1 Answer

Picture too dark


There are only 2 chips for colour convergence in this unit. there is also a screen control on each tube but most of all there is a bleeder assy. that can control the brightness.

Dec 14, 2006 | Toshiba 57H82 57" Rear Projection...

1 Answer

Faint Blue Line Follow-up Question for Maddogmic


This worked great for me, too; however, I was feeling ballsy and fiddled with the 3 focus adjustments as well. If you can get a solid lettering against a dark screen (like during the credits of a movie), you can fine tune those very easily (mine needed it).

Sep 17, 2006 | Sony KP-57WS500 57" Rear Projection...

1 Answer

Picture is very dark and has a blue haze to the darker areas


Theres no adjustment except the tvs On screen disply is what you should ONLY fool with. Anytime you have the option you do and your not happy with it . GO for it!!! get a full refund and start over with another one or go to another store. Good Luck

Jun 21, 2006 | Mitsubishi WD-52327 52" Rear Projection...

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