Table 5-1. LCD Guidelines

 

 

Type of Imperfection

Imperfections Not Allowed

Electrical Imperfections:

7 or more single bright dots.

Bright dots (a)

7 or more single dark dots.

Dark dots (a)

9 or more total (bright and dark combined) defective dots.

 

 

Any occurrence of multiple defective dots within 15 mm.

Mechanical Imperfections:

Any polarizer bubble, discoloration, or dent that is visible from at least

Discoloration

36 cm (14 in).

Polarizer bubbles, dents (b)

 

Definitions of imperfections:

 

a

Bright or dark dot: a subpixel (red, green, or blue dot) that is stuck on or off.

b

Polarizer dent or bubble: a light spot with a darker border that appears on a lighted display and does not

 

change size. (In contrast, a polarizer scratch is a light line that is visible on a darker background and does

 

not change size.)

 

Service Manual

Reference Information

5-3

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HP 2579AI, 2500, 2186AF, 2183AF, 2182AT, 2182AF, 2180EA, 2180AF, 2180CA, 2179AF, 2178EA LCD Guidelines, Mechanical Imperfections

2547EA, 2552AI, 2541AH, 2543AH, 2561AI specifications

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