Vga Cable Detect Test; Hi-Pot Test; Grounding Test; Bumping Test - Acer AL1917W Service Manual

Acer

3.6 VGA Cable Detect Test

If VGA cable of LCD monitor isn't connected to video pattern generator or PC, "NO SIGNAL" should
be shown on screen.

3.7 Hi-Pot test

Test condition:
a. high voltage
b. leakage current
c. rising time
d. test time

3.8 Grounding Test

Test condition:
a. test current
b. impedance

3.9 Bumping Test

3.9.1 Test mode: 1440x900 @ 60 Hz;
3.9.2 Test pattern: pattern #1 of crosshatch (GENERAL-1)
3.9.3 To shock LCD monitor lightly at the center of rear cover and edges with 1~2kg/cm2 force for
three times, no abnormal phenomenon is found on panel screen.

4. DISPLAY CHECK

4.1 Panel Flicker Check

Connect LCD monitor to PC, set LCD monitor to be timing of 1440x900@60 Hz, adjust brightness to
be default value (brightness at maximum), execute "Auto" function, and then check picture of shut
down under windows 98 operating system, or flicker-pattern of pixel on-off. It should be that no flicker
be found on panel screen.

4.2 Panel Defect Inspection

4.2.1 Test mode: 1440 x 900@60Hz
4.2.2 Test pattern: Crosshatch/Full white/Red/Green/Blue/Black/16 color bar/64 gray bars
4.2.3 Display quality must be (according to DIN 13406-2 pixel fault class II)
Bright dot defect
Dark dot defect
Total bright and dark dots
Bright Dots – 2 Adjacent B
Bright Dots – 3 or more
Adjacent
Black Dots – 2 Adjacent B
Black Dots – 3 or more Adjacent
Distance between defect dots
Distance between Dark dots
Note 1: Dot defect is defined as the defective area is not larger than 50% of the dot area. Bright Dot is
defined 5% transmission ND filter.
Note 2: Light Leakage: There shall not be visible light around the customer's bezel after assembly in
normal View angle.
sync)
Power off
2.3KV(DC)
10mA
1 sec.
3 sec.
30A / 2 sec
< 0.1Ω
Defect Type
< 1W
Specification
THD
THD
THD
THD
THD
THD
THD
THD
THD
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