Question about Toshiba 43H70 43" Rear Projection Television

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Rplaced both IC's and now need fine tuning

I replaced both RGB driver chips (IC's) and also one resistor that was bad. The picture is much, much better however when re-setting the convergence I cannot get #3 and #9 convergence on blue to line up wiht red and green.
Thank you for you help

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  • mlmaschmeyer Feb 11, 2008

    I was able to find a blog on getting into the service mode and I was able to adjust the colors that way. Set is good as new.



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You probably got 1 more resistor that is out of tolerance. These resistors have to be within 5% of their rated specs if not that's your problem. Check them with a digital meter with one leg of the resistor out of circuit for true readings

Posted on Feb 01, 2008


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Great reference link that I posted
pictures on, check out page 3

Where I got my parts that worked:
Suburban Electronics
Manual Library you should find all you need here:

What you need:
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(12) 6.8 Ohm Metal Film resistors
set of star screw drivers
15 watt pencil solder pencil, DO NOT use a high watt iron you will fry the surface mounted item.
good leaded solder, and flux

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