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TECHNICAL SERVICE MANUAL
Theory of Operation
1. AC/DC INVERTER
Input voltage :
Input current :
Output current :
Frequency(switching) :
Output power :
On/off control voltage :
2. AC/DC ADATOR
This display device shall maintain the specified per formances in the range de scribed
below
Frequency : 50/60Hz
Voltage : 90 - 264Vac RMS
The following consumption requirments shall be met:
Power Consumption : 35W(typ)
Current consumption : < 1.0 Aac RMS
Output Specification:
output1 : 12V/2A
output2 : 5V/1.5A
3. Audio System
This monitor has a audio system including two micro loudspeakers.
Each of two micro loudspeakers has a 2W(Max) output power.
This system also supports a headphone(earphone) output.
- Auto Signal Input : < 600mVp-p(Max.)
- Auto Amplifiers
2W+2W Amplifier with DC Volume Control (for two micro loudspeakers)
RL=8
@THD=10% Vcc=14V (min. 10V, max. 18V)
Dual-Audio Power Amplifier (for a headphone output)
RL=32
@THD=10% Vcc=4.5V (min. 1.8V, max. 15V)
- Speaker
Micro Loudspeaker Spec.
Normal impedance 8
Resonance Freq. 550Hz +/- 110Hz at 1.0V
Freq. Range fo ~ 20KHz
Power Rating Normal 1.0W/Peak 2.0W
4. DPMS MODE
Signal
Status
H-Sync V-Sync Video
on
Pulse Active
Pulse
No
No
off
Pulse
Pulse
DC 12V
2.0A(Max)
6.5mArms(TYP)
47KHz(Max)
18W(TYP)
5.0V
15% at 1.0V 1.5KHz
Power
Consumption
35W(typ)
Blank
1W (TYP) 230V AC
Recovery
Time
-
Within 3
Sec
7
Prestigio P171
LED
Indicator
Green
Orange
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