ViewSonic N1900w-1E, Service Manual

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RF tuner
Parameter Specification
RF Input Level 0~+15 dB mV
RF Tuning Range PAL: 48.25 to 855.25 MHz Off-Air and CATV
RF Tuner Sensitivity (S/N Ratio at
un-weight)
45 dB (min.)
Channel Bandwidth
PAL: 7/8 MHz Maximum
SECAM: 8 MHz Maximum
3. Power
Power Supply
Input Voltage Range 110 to 240 VAC
Power Dissipation 55 Watts (Typ.)
4. Audio Interface (Speaker Specification)
Parameter Specification
Phone Jack out
Tuner Input Base band Input
Speaker Power Output
Max Rating
2.5 W x 2 at 10% T.H.D
Distortion
2.5 W x 2 at 10% T.H.D. Distortion
Speaker Impedance
4 Ω 4 Ω
Line In Per Tuner Spec
500 mV rms (Typ)
1V rms (Max)
Line Out NA NA
Flatness of Amplitude
Response
(100Hz ~ 10KHz)
+/- 3 dB (at 1KHz @1W) +/- 3 dB (at 1KHz @1W)
Total Harmonic
Distortion
(1KHz @1W)
2% 1%
Signal to Noise
(1KHz @1W)
30 dB min 35 dB min
Stereo Separation
(20Hz ~ 20Khz)
MONO 40dB at 100Hz ~ 10 kHz
5. Electrical Requirements
Horizontal Frequency 30 – 82 kHz
Vertical Refresh Rate 50 – 75 Hz.
Maximum Pixel Clock 135 MHz
Sync Polarity Independent of sync polarity.
ViewSonic Corporation
Confidential - Do Not Copy
N1900w-1E
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