My Hitachi 53SDX01B picture is really dark. How do I fix this?

Presuming you cleaned the lens and the mirror you may have a problem in (yes) the power supply---some of these develop an issue where the filament voltage for the 3 picture tubes goes down as a resistor in the supply from age goes UP in resistance---going to need a meter and a service manual to find that.

If that is beyond you then consider getting a tech or a shop to look at the set.

Let me know if you have questions.

Well, that explains a lot----mirror or the lens or even the screen may be coated with grime-----be careful if you attempt to clean that screen, easy to damage and expensive to replace--what about the mirror and the 3 lens?

Replacing the coolant is not going to help a dark picture and is not for a do it yourself repair---it is toxic and dangerous to replace unless qualified.

No one has it in stock--board should be repairable unless lost etc.

http://www.partstore.com/Model/Hitachi+Ltd/Hitachi/53SDX01B.aspx


You might also contact PTS Electronics who repairs boards and may have one of these rebuilt as well.

If its the board with the RCA jacks it may be fixable.

the problem here is Hitachi usually if it still has it sells all three screens as a unit---expensive.

You may want to search with GOOGLE the internet as some companies sell replacement "protective" screen replacements.

I have even seen one time someone found a piece of plexi-glass and had it cut to the exact size and thickness for a replacement.

Power supply problem

The tv have picture look like a bright dull hallow glow to the screen,yes,than the tv CRT tubes coolant chemicals is bad.Tries websites like Tvrepairworld.com,Tvrepairkits.com to buy a coolant kit to do the replacement.

2.5 ohm resister at 2 watts at R43 is bad on the 53sdx01b same boards as my tv , when mine went it was at 12 ohm instead of 2.5

i have a 50" r.p. Hitachi, kinda had the same problem, it would go off at different times and i't hit on the back and get it to come back on,but after awlhile i'd have to hit it more and harder to get it back on till it quit, the menu would come on and would show the video 1 ,3 and that in the corner.After paying $75 for a guy to say it wasn't worth fixing i tried myself. Not knowing what i was doing, i checked all wire plug connections. Found 2 that wasn't seated good replugged them and still didn't work then tried the bulbs, just kinda jiggled all 3 one didn't feel the same so just tapped on it alittle and it popped, i guess back into place, anyway turned on the tv and it worked. Had moved it recentlly so i don't know if that is what moved the bulb. Hope this helps, also mine is a '94 model.

use the advanced options page and reset the factor blue and red convergence defaults then do re apply the auto color defaults color at first it seemed very red (which is good because red was the missing factor in the green picture) but after reseting all the color and tints to the normal ranges I then reset the color auto correct again and all seems fine.