Question about Hitachi 43F300 43" Rear Projection Television

Colors won't stay set

We were gone for 2 weeks and our house got very hot while we were gone. Ever since then, we can't keep the colors adjusted

1 Answer

Lashawn Robinson

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NOTE: Manual Convergence settings ARE LOST if the customer returns to AUTO Magic Focus mode. (More Details) this situation is normal. Bottom line: This is caused by two issues, The Centering is off of any or all CRTs. (Don't forget Red and Blue Offset values). The Horizontal Size needs to be changed by increasing H. Size by 20mm. Readjust the Horizontal Size to the NEW specifications. These are different that the original Service Manual. They have been increased by 20mm on 51", 57" and by 25mm on the 65". Before replacing DCUs, Please CHECK and confirm if any of the three color center alignments are off and readjust the Horizontal Size to the New specifications.. TO CHECK. Clear DCU data by holding down the DCAM "Service Only Switch" and then POWER. Make sure the Green is centered. Make sure the Red and Blue is offset from center with respective offset value according to the SM information. Readjust the Horizontal Size to the NEW specifications. These are different that the original Service Manual. They have been increased by 20mm on the 51" and the 57" and on the 65" it's increased by 25mm. There IS NO NEED to replace DCUs. The DCUs are not defective...All that is needed is to confirm the Centering Adjustment for the three colors and adjust the Horizontal Size to the NEW specifications. Adjust if any color is found to be out of adjustment specifications. If you don't understand this then you need live chat!

Posted on Oct 04, 2007

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