Pioneer PDP 427CMX technical manual Mounting surface warping

[427CMX] Installation Conditions

3.3.4 Mounting surface warping

The display incorporates glass. Before mounting the panel using hardware other than that provided by Pioneer, perform the following checks to confirm that the display is free from warps exceeding 1 mm*.

Regarding the 1 mm limit:

The panel frame may have a warp of up to 3 mm. If the total warp (the warp of the frame plus the warp of the mounting surface) exceeds 4 mm then the glass in the display may experience excessive stress. To ensure that the total warp is less than 4 mm, verify that the warp of the mounting surface is less than 1 mm.

1Referring to the illustration below, diagonally extend string (maximum diameter φ 0.1- mm) through the bolt mount openings. Strings should be completely free of slack.

2Measure the clearance (L) between the strings where they cross. Distortion is expressed by: [Distortion] = L ⋅ 2.

3If L is found to be 0, pass the strings through the other bolt mount openings then repeat the measurements. Any value of L greater than 0 indicates the presence of distortion. If the measured value in both cases is 0, the distortion is negligible.

A

Mount bolt holes

Plasma Display Mount Surface (Mount Brackets)

A		D	Magnified view of section A
String
			Point E is the center point of string
F
			segment A-B.
	L		Point F is the center point of string
			segment C-D.
E			Clearance between points E and F = L
			(Points E and F are shown displaced
String
			for illustrative purposes).
C		B

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