The DLP TV is largly divided into: Power Part; Engine Part and Analog + Digital parts. The ass'y that consists of the DMD board, Detect (actuator) board, Lamp, Ballast and optical devices are called the light engine. The Analog + Digital board parts receive the AV signal to output voice signals and process the remote control signals. The engine part displays the video data on the screen, which is generated in the Analog + Digital boards.
AV signals are input through the analogue and digital boards. ADV7401 processes the MUX and de-coding, while the X266 B processes the CPU functions, MPEG and I2S. Finally the improved DNle image is send to the DMD engine board.
The final data by DNle is processed in DDP1011 of the DMD board to display the image on the DMD panel. This image is created by the light of the lamp through the color wheel which is enlarged and projected on to the screen. This is the DLP of the L3 or L6 type that the actuator operated additionally during this process.
The Power terminal generates the DC power needed for the product and sends it to analogue board supplies the power to the digital and DMD boards. In the meantime, the power source board supplies DC220V - 400V directly to Ballast in order to light the lamp. The ballast is like a stablilizer for lighting the lamp. The ultimate purpose of the TV set is to project an image on to the screen and output voice signals synchronised with the image. And based on the DMD panel used, a 1-panel TV requires a color wheel while a 3-panel TV does not. The HD4 panel needs an actuator while the HD2 does not. However, the drive mechanism and overall block structure of the two panels are the same.
SMPS
- This is an acronym Switching Mode Power Supply and this is responsible reciving AC input voltage, and supplying insulated DC output.
SMPS Components
- Standby Power: A combination of ICS801 (Switching IC) and TS 801S (Transformer) that supplies standby 5V for operating the Micom.
- Multi power: The voltage supplied when the power is turned On. It is a combination of IC801S that supplies various voltages including D12V, A6.5V, S14.5V, T30V and A65V.
SMPS OPERATION
- SMPS System: Uses Fly-Back technology for both standby and multi-power.
- Operation: Fly-Back is one of the most popular power supply systems uses less power than 200W as well as being the cheapest of all multi output SMPS system.
- Converts AC input into DC [HOT] (Rectifies to DS801 before smoothing to CS801).
- The converted DC voltage is high, especially compared to Ground, so touching it will cause electric shock> Use T801S (transformer) to insulate the secondary voltage and take advantage of the PWM operations of T801S and IC801S to induce it.
- The secondary induced voltage at 66KHz square wave power, which goes through the smoothing capacitor CS822 to be generated in the Standby 5V.
- Multi-Power also operates the same way.