ViewSonic VS11770-1M, Service Manual

Page: 7 / 100

Parameter Specification
LCD Type
a-Si TFT Active Matrix Wide Color, Transmissive Mode, Normally
Black
LCD Interface 1-Channel LVDS
Resolution (Native) WXGA, 1366 x 768
Display Area 31.5” diagonal; 697.68 (H) x 392.25 (V) mm.
Pixel Pitch 0.51075(H) × 0.51075(V) mm
Viewing Angle H = +/- 88
°
, V = +/- 88
°
with CR ≥ 10 (Typical)
Contrast Ratio 1200:1 (Typ); 800:1 (Min)
Brightness 500 nits (Typ.); 400 nits (Min)
Response Time 8ms, (Typical), g-g
Color Gamut NTSC 75% Typ
Brightness Uniformity 1.3 (Max), measured per panel spec.
Chromaticity (CIE1931) White-x:0.285,White-y:0.293 (Standard Mode Only)
Colors 16.7M (8-bit)
Surface Treatment Hard coating (3H)
Backlight 14 CCFLs (Cold cathode Fluorescent Lamp)
Panel Acceptance
Refer to the panel acceptance criteria specification.
Note: Intermittent and/or Display Pattern defects which result in
further bright or dark dots will be counted individually against the
above specification.
Front Screen Artifacts
VS Standard:
a.) No Visible Streaking, Sag or Smearing artifacts when driven by
the specified video cards (see 7.1 General Test Equipment) in the
primary mode (VGA at 60 Hz) and after user adjustment
b.) No image drift or lose fine-tune settings due to panel temperature
change
Note: Panel performance characteristics “ MUST BE” met in all display modes/inputs at standard test
conditions.
1. RF Tuner
RF tuner of this product shall be provided by “Samsung DTVS205CH201A” for NTSC/ATSC. The
following table defines this tuner specification.
Parameter Specification
RF Input Level 45 ~ 85dBµV
RF Tuning Range
NTSC: 55.25 to 801.25 MHz, 2-69 Channels for
Off-Air and 2-125 Channels for CATV
RF Tuner Sensitivity (S/N Ratio at un-weight) 45 dB (min.)
Channel Bandwidth NTSC/ATSC: 6 MHz Maximum
0.7(min.)–1.1(max.) V
CVBS Characteristics:
Video Amplitude Signal
DC Level Sync Pulse
Typical. 0.35 V
Audio Characteristics:
AF Output Level Measured via LP 20 kHz
Filter, RMS Decoder,
75us De-emphasis
THD
S/N
Typical. 0.35Vrms
10% (max.)
44 dB (min.)
Compatible system TUNER NTSC/ATSC
Compatible system AV NTSC M
2. Specification
ViewSonic Corporation
Confidential - Do Not Copy
N
3235
w-1M
4