- 40 Vertical lines 16 pixels wide: DDP3021 or BGA, DMD panel interference.
- Replace the DMD board or DMD Panel.
Horizontal Bar or No Raster: Error in DAD2000 or DMD
Panel or other DMD board problem. Replace
the DMD board or DMD Panel.
Dotted Vertical Bar:
Error in Rambus Dram(IC 403) or the soldering. Replace the DMD board.
Beehive mosaic patterns all over the screen: Error in the TMDS Receiver (IC100) or the
soldering. The H sync signals are not
transferred to DDP3021. Check the
Digital Board and DVI cable If there was no problem, Replace the DMD board.
VIDEO CIRCUIT ERROR CHECKING
Basics:
- The DDP3021 on the DMD board has a feature to display internal test patterns.
- SDP62, which is an end port in the digital board, has a feature to display internal test patterns.
- The rear board is the first output and the main board is the second one, followed by DMD, which is the final one.
- Access Service Mode. (In Standby mode, press "Mute", "1", "8", "2" and "Power" to turn the screen on and enter service mode)
- Check if there is an error in the DMD board DDP3021 →TEST PATTERN →Press the right arrow key: Options of FULL WHITE, BLACK, RED, GREEN and BLUE PATTERN are displayed on the screen. If "Pattern" does not appear, this is a DMD board error.
- Check if there is an error in the main board before the DMD. When the DMD board has been determined to be error free based on the test patterns: FACTORY MODE àSDP62 àTEST PATTERN normal display: no error in the main board. If "Pattern" does not appear, you have to check a rear board first, and check a DMD Board second, next check a main Board.
- Check for a power signal from the SMPS to the main boards.
NOISE
A foreign substance on the fan or driving device may cause
internal noise. For a DLP TV, the lamp
fan, DMD board fan and color wheel are vulnerable to noise. Sometimes the
connector wire around the lamp or DMD fan makes contact with the fan, while the
color wheel is protected inside the module and cannot make contact with any
nearby wires. However the color wheel sensor or the drive motor may cause noise
by making contact with the color wheel.
As the color wheel uses an air bearing system, it has a very slight
possibility of creating internal noise.
When irregular noise occurs for no particular reason, check
the inside of the TV for any foreign substances. The DLP projection TV may cause noise as the physical screen is
empty inside, causing a resonance to a particular frequency. Thus a low vibration is not a malfunction.
Any 'creaking' noise is mostly from the structure of the
device itself. A short, harsh noise may occur from a distortion or malformation
due to thermal expansion between the metal joints, screws and loaded parts,
respectively. Any intermittent 'creaking' noise can be removed by loosening the
screws.
- A black screen with the lamp on: Replace the DMD board.
- Line Pattern: Regular line patterns occur vertically or horizontally: Replace the DMD board.
- Voice Distortion: Replace the main or rear board.
- Outside Light: This is not a product malfunction, but a possible installation or human error. This occurs when the projected light from the surrounding illumination reflects onto the screen. This disappears as the TV starts operating and the TV lamp gets brighter. However, you can avoid outside light by changing the position of the TV or the installation angle. Decreasing the illumination or changing the indoor lighting may work.
- Screen Flip-over: Enter Factory mode in DDP3021 and perform H-Flip (flip horizontally) and V-Flip (flip vertically). The screen will flip over horizontally or vertically.
Blinking Temp & Timer LED CLICK ON THE PICTURE TO ZOOM
