BenQ G2220HD - 21.5" LCD Monitor, Service Manual, Page: 9 / 47

9
3.5.3 Environment
Operating Specification
Temperature range
0°C to 50°C
Relative humidity 5% to 90%
Altitude 0 to 10000 feet
Storage
Temperature range
-20°C to 60°C
Relative humidity 5% to 90%
Altitude 0 to 30000 feet
3.5.4
Speaker : 1.5W 12
Ω
X 2
Input impedance : ≥ 10K ohm
Frequency response range : 500Hz – 20 kHz
Signal to noise ratio :
≥
75 dB
±
3
Output power : 1.0 W + 1.0 W (Typical) @5%THD (Input sine wave signal: 1 KHz/0.7Vrms)
3.5.5 Electrostatic discharge Requirements
Item Condition Spec Remark
Contact discharge : 4KV ●
Contact discharge : 8KV
Air discharge : 8KV ●
Electrostatic
Discharge
InnoLux SPEC
Air discharge : 15KV
D-sub cable pin
need test 4KV and
DVI cable test 4KV
3.5.6 Reliability
Items Condition Spec Note
MTBF 95% Confidence
≧
60,000 Hours
CCFL Life time Luminance becomes 50%
≧
40,000 Hours at 7.5mA
(min)
Note1
Note1. Display an all white field at mid Brightness and Contrast settings.
3.5.7 Audio performance
Items Specification
Speaker
1.5W 12 Ω X 2
Input impedance
≥ 10K ohm