Service manual

ViewSonic Corporation Confidential - Do Not Copy VX2245wm-1
12
4-7 TFT LCD PANEL
1st Source Panel
Model number CMO A220Z1
Type TN type with RSDS interface
Active Size 22” wide ; 473.76 (H) x 296.1 (V)
Pixel Arrangement RGB Vertical Stripe
Pixel Pitch 0.282(H) x 0.282(H) mm
Glass Treatment Anti Glare (Hard coating 3H)
# of Backlights 4 CCFL ; Top & Bottom edge side
Backlight Life 40,000 Hours (Min)
Luminance (5-point) –
Condition:
CT = 6500K, Contrast = Max, Brightness =
Max
280 cd/m2 (Typ after 30 minute warm up)
200 cd/m2 (Min after 30 minute warm up)
Brightness Uniformity 77 % (Typ) / 67 % (Min)
Contrast Ratio 700:1 (typ), 450:1 (min)
Color Depth 16.2 million colors (6 bits + 2 bits FRC)
Viewing Angle (Horizontal) @ CR>10
Typical: 170º
Minimum: 150º
Viewing Angle (Vertical) @ CR>10
Typical: 160º
Minimum: 140º
Response Time
10%-90% @ Ta=25°C
Typical = 5ms (Tr =2 ms,Tf =3 ms)
Maxmum = 15ms (Tr =7 ms,Tf =8 ms)
Mercury 3.0 mg per lamp
Panel Defects Please see Panel Quality Specifications.
*The average of measured value from monthly shipment shall be equal or better than the Typical value above.
4-8 IMAGE PERFORMANCE
Factory Defaults
Item Defaults Item Defaults
Contrast 70% OSD Time Out 15 Sec
Brightness 100% OSD Background On
Color Temperature 6500K Volume 90%
Sharpness 100% Treble N/A
OSD H. Position 50% Bass N/A
OSD V. Position 50% Input Priority Auto Search
720x400/640x400 720x400 Resolution Notice Enabled
Display Size
Horizontal Display Size, Primary Preset Full Screen
Vertical Display Size, Primary Preset Full Screen
Luminance
Lv (Max) –
Condition:
Contrast = 100%
Brightness = 100%
CCT = User color(R/G/B=100%)
Lv (Max) = The Luminance in section
4-7 “TFT LCD PANEL”
Lv (sRGB) –
Condition:
Contrast = Default
Brightness = Default
CCT = sRGB
110 nits ≦ Lv (sRGB) ≦ 140 nits
Lv (6500k) – Lv (6500K) / Lv (Max) x 100% > 85%