Acer AL2016 Panduan Servis - Halaman 17

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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:

b. impedance

3.9 Bumping Test

3.9.1 Test mode: 1680x1050 @ 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.

DISPLAY CHECK

4.1 Panel Flicker Check

Connect LCD monitor to PC, set LCD monitor to be timing of 1680x1050 @ 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

This item should follow IIS

4.2.1 Test mode: 1680 x 1050@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.

2.3KV(DC)

10mA

1 sec.

3 sec.

a. test current

30A / 2 sec

< 0.1Ω

Defect Type

Specification

≤ 3pcs

≤ 4pcs

≤ 5pcs

N ≤ 1 pair

N ≤ 0 pair

N ≤ 1 pair

N ≤ 0 pair

L ≥ 15 mm

Service Manual

Major

Minor