Philips 150S4FG/00 Service Manual page 38

38 150S4 LCD
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SETTING MEASUREMENT AREA
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Measurement areas of 25mm and 50mm can be selected by extending or retracting the lens barrel. The 25mm measurement area can
be used for measuring LCDs with 2 - inch or greater diagonals: the 50mm measurement area can be used for measuring LCDs with 4 -
inch or greater diagonals.
Set the measurement area :
Using a slotted screwdriver, loosen the lens - barrel locking screw.
Slide the lens barrel to the position corresponding to the desired measurement area. The lens barrel should be slid in the
desired direction until it stops.
Extending the lens barrel fully sets the 25mm measurement area: retracting the lens barrel fully sets the 50mm
measurement area.
Use the screwdriver to tighten the lens - barrel locking screw and lock the lens barrel in position.
Changing the measurement area also changes the measurement angle. this may result in differences between values
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measured with the 25mm measurement area and those measured with the 50mm measurement area to the
viewing - angle characteristics of the LCD. For this reason. it is recommended that the measement area be constant
for all measements.
Colour Adjustment
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