Philips BDL3221V 32 inch WXGA TFT LCD Monitor/TV- How to enter the factory mode, SMPS schematic and troubleshooting

Philips  BDL3221V / 27 BDL3221VS / 00 320WN6QS / 93 320WN6QS / 97

This LCD TV monitor use BDS platform for the video and audio processing.
It can support PC analog, digital signal and TV signal.
It support PIP function that is TV picture on PC graphic or TV picture on DVI (support HDCP).
It's output resolution is up to 1366X768 75Hz for WXGA panel.

TV use MST5151A as Scaler engine, which has embedded Analog D-sub, digital DVI(HDMI) decoder,
scaling input signal for panel, OSD and advanced 3D de-interlace. The DDR SDRAM is used to accomplish video frame rate conversion and PIP function.
The external CPU is used for back light control, RC receiver, keypad input, I/O switch control , IIC communication and TV tuning control, MSP3450G sound decoder control, SAA7119 video decoder control , Columbus IC ( 3D -comb filter ) control , and Audio AMP TPA3008D2 control.
Video decoder SAA7119 is used for TV video processing and convert it with CCIR 656/8bits digital format and send to Columbus IC for 3D comb filter processing and noise reduction processing , after that then send to Scaler for de-interlace process.
Columbus IC is a combination of Enhanced 2D / 3D Comb filter for both PAL and NTSC , and a Spatial / Temporal noise reduction system for both colour and luminance signals .
One audio decoder MSP3450G is used for TV sound processing, and output to Class D audio amplifier
TPA3008D (2 X10W) audio output. This audio decoder is a global sound decoder for Nafta AP, China and European market.
In NAFTA model CC,V-chip data is decoded in SAA5264PS/M3/1437 and the display the CC information via mixed at SAA7119 with the input signal.
The V-Chip is decode by SAA5264PS/M3/1437 and control via the MCU.
In Europe model "Teletext display". Data decode is done by SAA5264PS/M3/1437, output RGB/FB is to video decoder input for text overlapping

Lock/Unlock, Aging, Factory Mode

The OSD function can be locked by pressing "MENU“ button(1) for more than 15 seconds, the screen shows following windows for 3 seconds. Every time when you press “MENU" button, the message appears on the screen automatically.

Unlock OSD function
Unlocked OSD function can be released by pressing "MENU" button for more than 15 seconds again.

Access Aging Mode

Disconnect Interface Cable between Monitor and PC

Turn off LCD monitor. Then press power " " button. Then  quickly push "Left "and "Right ", buttons and hold these two buttons until Aging Screen comes out and then release all buttons.

Factory Mode

Turn off monitor.

Press power "Power " button. Then quickly push "Left " and "Right ",and hold this two buttons , then the screen comes out "Waiting For Automatic Adjustment ",then the screen will be black for one second until comes out "Windows screen"] => then release this two buttons.

Press "MENU" button, wait until the OSD menu with Characters "BDS 32*420WN6 EU V0.50.3 05051LC32*A 6K3*A1" (below OSD menu) come on the Screen of the monitor Factory Menu
Cursor can move on gray color area
Hot key function: by pressing "Up " and " Down " key Simultaneously at User Mode (or Factory Mode)
(PS: The Offset R G B function can be used on reduce or eliminate snowy noise on the background when the resolution of video signal is 1280*768 vertical 75Hz. Slightly increase or decrease the value until snowy noise completely disappear.

Flat Panel Monitors Pixel Defect

pixel or sub pixel defects on the TFT LCD panels used in flat panel monitors are sometimes unavoidable. No manufacturer can guarantee that all panels will be free
from pixel defects, but Philips guarantees that any monitor with an unacceptable number of defects will be repaired or replaced under warranty. This notice explains the different types of pixel defects and defines acceptable defect levels for each type. In order to qualify for repair or replacement under warranty, the number of pixel defects on a TFT LCD panel must exceed these acceptable levels.

For example, no more than 0.0004% of the sub pixels on a 15" XGA monitor may be defective. Furthermore, Philips sets even higher quality standards for certain types or combinations of pixel defects that are more noticeable than others. This policy is valid worldwide

A pixel, or picture element, is composed of three sub pixels in the primary colors of red, green and blue. Many pixels together form an image. When all sub pixels of a pixel are lit, the three colored sub pixels together appear as a single white pixel. When all are dark, the three colored sub pixels together appear as a single black pixel. Other combinations of lit and dark sub pixels appear as single pixels of other colors.

Pixel and sub pixel defects appear on the screen in different ways. There are two categories of pixel defects and several types of sub pixel defects within each category. Bright dot defects appear as pixels or sub pixels that are always lit or 'on'. These are the types of bright dot defects:

Because pixel and sub pixels defects of the same type that are near to one another may be more noticeable

In order to qualify for repair or replacement due to pixel defects during the warranty period, a TFT LCD panel in a Philips flat panel monitor must have pixel or sub pixel defects exceeding the tolerances Bright Dot is defined as dots (sub-pixels) which appeared brightly in the screen when the LCM displayed with whole pattern & Bright Dot's brightess is defined over 50% of the brightness against around. (but,Green bright dot is over 30% of brightness against around)

Tiny Bright Dot is defined as "for Red and Blue" the bright area should be no longer than 1/2 sub-pixel and for green the bright area should be no larger than 1/3 sub-pixel.

SMPS (Power Supply Regulator board) circuit diagram

Troubleshooting