ViewSonic VP720B Service Manual - Page 7

Specification - audio

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2. Specification 1. General Requirements General Specifications Test Resolution & Frequency Test Image Size Contrast and Brightness Controls "1280 x 1024" @ 60Hz Full Size Factory Default: Contrast = 100%, Brightness = 100% 2. Signal Interface Video Interface Analog Input Connector Default Input Connector Video Cable Connector DB-15 Pin out Video Signals Video Impedance Exclusions DB-15 (Analog) DVI = DVI-D (Digital) Defaults to the first detected input Compliant DDC 1/2B. Video RGB (Analog) Separate Sync / Composite Sync / SOG TMDS (Digital) 75 Ohms (Analog), 100 Ohms (Digital) Not compatible with interlaced video. 3. Power Power Supply Input Voltage Range Power Dissipation 90 to 264 VAC 40 Watts (Typ.) 4. AUDIO INTERFACE (SPEAKER SPECIFICATION) Speaker specification Line input connection 3.5 mm stereo jack Line input signal 1.0 Vrms Line input impedance 22 kOhm Maximum power output (Electric) 1 W@ < 15 % distortion Signal to Noise Ratio 40 dB Frequency response 100 Hz - 20 Khz Distortion < 5 % THD (@1kHz) Vibration There should be no audible vibration with volume at 100% and treble / bass at default. Screen image There should be no affect on the screen image stability under any conditions. Connector PC99 requirement Audio in Lime Green pantone # 577C Cable type / length 3.5mm stereo cable / 1.8m length Audio DPMS Speakers should be off when the rest of the monitor is in power saving. No any sympathetic or abnormal noise allowed under Volume OSD ≤ 70% 5. Electrical Requirements Horizontal Frequency Vertical Refresh Rate Maximum Pixel Clock Sync Polarity 24 - 82 kHz 50 - 85 Hz. 135 MHz Independent of sync polarity. ViewSonic Corporation Confidential - Do Not Copy 4 VP720-1_VP720b-1

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2. Specification
1. General Requirements
General Specifications
Test Resolution & Frequency
“1280 x 1024” @ 60Hz
Test Image Size
Full Size
Contrast and Brightness Controls
Factory Default:
Contrast = 100%, Brightness = 100%
2. Signal Interface
Video Interface
Analog Input Connector
DB-15 (Analog)
DVI = DVI-D (Digital)
Default Input Connector
Defaults to the first detected input
Video Cable Connector DB-15 Pin out
Compliant DDC 1/2B.
Video Signals
Video RGB (Analog)
Separate Sync / Composite Sync / SOG
TMDS (Digital)
Video Impedance
75 Ohms (Analog), 100 Ohms (Digital)
Exclusions
Not compatible with interlaced video.
3. Power
Power Supply
Input Voltage Range
90 to 264 VAC
Power Dissipation
40 Watts (Typ.)
4. AUDIO INTERFACE (SPEAKER SPECIFICATION)
Speaker specification
Line input connection
3.5 mm stereo jack
Line input signal
1.0 Vrms
Line input impedance
22 kOhm
Maximum power output (Electric)
1 W@ < 15 % distortion
Signal to Noise Ratio
40 dB
Frequency response
100 Hz – 20 Khz
Distortion
< 5 % THD (@1kHz)
Vibration
There should be no audible vibration with volume at
100% and treble / bass at default.
Screen image
There should be no affect on the screen image
stability under any conditions.
Connector PC99 requirement Audio in
Lime Green pantone # 577C
Cable type / length
3.5mm stereo cable / 1.8m length
Audio DPMS
Speakers should be off when the rest of the monitor
is in power saving.
z
No any sympathetic or abnormal noise allowed under Volume OSD
≤
70%
5. Electrical Requirements
Horizontal Frequency
24 – 82 kHz
Vertical Refresh Rate
50 – 85 Hz.
Maximum Pixel Clock
135 MHz
Sync Polarity
Independent of sync polarity.
ViewSonic Corporation
Confidential – Do Not Copy
VP720-1_VP720b-1
4