PRIMA PS42D8
Service Manual

Item 1 2 3

Kind Dark spots Bright spot Flickering
spots

Area A No more than 4 No more than 1 No more than 1

Area B No more than 10 No more than 3 No more than 3

Remark Total number of defective points in A and B shall not exceed 14. The distance between two defective points shall not be shorter than 10mm.

Method of Debugging
For Models PS-42D8 and PH-50D8, the debugging part lies only in the white balance adjustment. Nothing else should be adjusted and the maintenance software supplied for after-sale purpose has normally shielded the value of white balance i.e., no more adjustment is needed when upgrading the software. In case of special circumstances where the main board is replaced following method can be adopted: 1). The white balance adjustment is made respectively in three ways - TV/AV�VGA�YpbPr. First adjust TV/AV, then VGA and YpbPr at the last 2). Select corresponding channels respectively. After successively press the keys on the production plant�s remote control (the key at the right hand lower corner doesn�t show up), go on to press the left key, right key, confirmation key on the small keyboard one by one and then it�s possible to enter the menu set up in the plant. 3). Use the right key to select and calibrate the menu. The white balance adjustment and YpbPr white balance adjustment are for the purpose of white balance adjustment. For the white balance adjustment of TV/AV and VGA it�s OK just directly adjust the first item whereas for YpbPr adjust the second item. 4) For the white balance adjustment of TV/AV and VGA: select the item of �white balance adjustment� from the menu. When it�s entered (as shown in the fig. Below), keep RCUI immovable and adjust GCUT and BCUT so as to adjust the white balance of the dark area. For the adjustment of white balance of the bright area, keep RGR immovable and then adjust GGRV and BGRV. Repeat the above steps several times until the picture is normal in white balance. For the white balance adjustment of YpbPr: select the item of �white balance adjustment� from the menu. When it�s entered (as shown in the fig. Below), adjust RCUT�BCUT and it�s done.

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