Display Check - Acer AL2017 Service Manual

Acer
Standby (No H/V
Power off
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: 1400x1050 @ 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 14400x1050@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: 1400 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
Status Power Consumption
Normal < 42W(with audio)
sync)
2.3KV(DC)
10mA
1 sec.
3 sec.
30A / 2 sec
< 0.1Ω
Defect Type
LED Display
< 1W
< 1W No display
Specification
THD
THD
THD
THD
THD
THD
THD
THD
THD
17
Service Manual
Green
Orange
Major Minor
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