Agilent Technologies 54835A, Service Manual, Page: 73 / 208

Chapter 4: Calibrating and Adjusting
To check the flat panel display (FPD)
4–7
To check the flat panel display (FPD)
No equipment is required for this procedure. Specifications for flat-panel displays used in the
Infiniium oscilloscope are shown in the following table.
Flat-Panel Display Specifications
1
Enable the graphical interface.
2
Select Self Test from the Utilities menu.
3
Click the Service Extensions box in the Self Test dialog.
4
Select Screen from the Test drop-down list box.
See figure 4-2.
Defect Type Limit
Polarizer Scratch Width
≤
0.05 mm
Length
≤
10 mm
Dent
φ ≤
0.4mm
Dot Defect
(A dot is defined as 1, 2, or 3 stuck
subpixels touching horizontally.
Subpixels are horizontal red, green,
blue triads, so these may show up as
one of 8 colors or black.) Bright dot N
≤
5
Dark dot N
≤
7
Total dot N
≤
12
Two adjacent dots
Bright dot
Dark dot
≤
2 pairs
≤
2 pairs
Three or more adjacent dots Not allowed
Distance between defects
Bright dot
Dark dot
≥
10 mm
≥
10 mm
Line Defect Not allowed
Non-uniformity Check other specifications
Luminance
(The measurement is perpendicular
to the screen surface in both axes.) Minimum
Typical 160 cd/m
2
200 cd/m
2
When to Use this Procedure
This procedure should not be performed as a part of routine maintenance. Perform the procedure only
when there appears to be a problem with the display.