Service manual

1. Scope
The following specifications are applicable to model VG800b 18 inch color
LCD monitor.
2. General Description (Quick Reference)
Chi-Mei 18.0” SXGA TFT- MVA
LCD
Size
Effective Display Size
Pixel Pitch
Resolution
Brightness
Contrast Ratio
Color
Viewing Angle
Surface treatment
18.0 inches diagonal
357.12 mm X 285.696 mm (typical)
0.279 mm X 0.279 mm
1280 x 1024 dot (SXGA)
250 cd / m² (typ.), 200(min.)
600:1(max), 400:1(typ.), 300 (min.)
16,777,216
Up 80° Down 80°(min.)
Left 80° Right 80°(min.)
CR>10:1
Anti-Glare
Input Signals RGB
Analog 0.7 Vp-p / 75Ө
Separate sync.
Composite sync
Sync-On-Green
Positive Polarity
TTL level
Input connector Analog mini D-sub 15 pin x 1
Audio min-Din 2 channel x 2
Speaker Max 3W x 2
Main IC GM5020
Display Colors 16,777,216
Preset Timings 1280x1024@60Hz, 75Hz,
1024x768@60Hz, 70Hz, 75Hz, 85Hz
800x600@56Hz, 60Hz, 72Hz, 75Hz, 85Hz
640x480@60Hz, 72Hz, 75Hz, 85Hz
720x400@70Hz
Synchronization Horizontal
Vertical
Non-interlaced
30 kHz to 82 kHz
50 Hz to 85 Hz
Max Pixel Rated 135Mhz
(automatically)
(automatically)
Resolution Horizontal
Vertical
1280 dots
1024 lines
Active Display
Area
Horizontal
Vertical
357.12 mm (typical)
285.696 mm (typical)
(Active display area is dependent upon signal timings)
Power Supply
Rating
AC adapter input
DC input
AC90V-264V 50 / 60 Hz
DC 12V
AC Power
Consumption
60W
less than 3W
On mode
Off mode( w/o audio cable connected )
ViewSonic Corporation
Confidential – Do Not Copy
VG800b
3