Delta Elec. Inc.
Vivitek
rev.00
Company Confidential VIVITEK_______________________ Delta____________
21
2008/07/28
3. Audio signal processing
•
The audio output is generated from the speakers via the amplifier (U900) provided with a
volume control.
•
The volume control is conducted by the DC output from the D/A converter (U900).
4. System control
The scaler (U400) controls all of this system.
5. Power circuit
1. Main power supply
•
In the state of standby, the power is supplied 5V to the scaler, scaler peripheral ICs,
and FLASHROM.
•
After the power is ON, the power at 2.5V, 3.3V, 5.7Vand 13V is fed to the analog circuit,
fan, formatter board, etc.
2. Lamp power supply
•
The lamp is lit with POWER ON.
•
Unlighting detection is performed.
6. Safety design
•
Fan circuit detection
•
Lamp cover detection
•
Lamp house temperature detection
•
Thermal protector for the lamp power supply
•
Lamp replacing time