Acer AL1731, Service Manual

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2.9 Audio Technical specification
2.9.1 General Description:
Output power : 1Wrms + 1Wrms maximum
Total harmonic distortion : Less than 1 % (except speakers distortion)
Input signal sensitivity : 0.5 Vrms for full output
Input impedance : 47 Kohm +/- 5 %
Frequency response range : 20Hz – 20kHz (except speakers response)
Difference of L and R output : Less than 2 dB
2.9.2 Electrical characteristics (Tamb=25
°
)
Audio amplifier(USE Panasonic VP-7723A Audio Analyzor. )
Spec. Item Audio Input Freq.
Min. Typ. Max.
Comment
Input Voltage(V) - 5 -
Input Current(m A) - 500 800
Audio Voltage Gain 500m Vrms 1KHz - - 6 d B Volume Max.,load 4 Ω
Frequency Response 500m Vrms 300Hz-20KHz -10dB - +10d B Volume Max.,load 4 Ω
Signal to Noise ratio 500m Vrms 1KHz - - -40dB Volume Max.,load 4 Ω
Total harmonic distortion 500m Vrms 1KHz 1% except speakers distortion
Cross talk 500m Vrms 1KHz - - -30dB Volume Max.,load 4 Ω
Output Watt. 500m Vrms 1KHz - - 1W Volume Max.,load 4 Ω
Volume Control - - - Analog
2.9.3 Speakers
Maximum power : 2 W speaker(max)
Impedance : 4 ohm +/- 15 % @ 1kHz 1.0Hz
Frequency response range : 350 Hz – 15 kHz (S.P.L. – 10 dB)
Total harmonic distortion : Less than 5 % @ 0.125 W 1kHz