Philips BDL4681XU/00 User manual

Description Page
Important Safety Notice--------------------------------------2
Technical Data--------------------------------------------------3
Installation----------------------------------------------------4~7
On Screen Display----------------------------------------9~14
---------------------------------15
Mechanical Instructions ------------------------------16~19
Color adjustment ---------------------------------------20~21
Electrical instruction ----------------------------------22~24
DDC Instructions & Serial Number -----------------27~34
DDC DATA ----------------------------------------------------35
-------------------------36~39
Philips Pixel Defect Policy
Firmware Upgrade for CPU--
Horizontal frequencies
31-83kHz
TABLE OF CONTENTS
Description Page
------------------------------------40
Wiring Diagram-----------------------------------------41~42
Block Diagram-------------------------------------------43~44
Power Diagram & C.B.A. ----------------------------54~56
Control Diagram & C.B.A. ----------------------------57~58
General product specification---------------------59~117
Exploded View ---------------------------------------------118
Repair tips---------------------------------------------121~122
Repair Flow chart------------------------------------123~128
Safety Test Requirments---------------------------------129
Spare/ arts List-----------------------119
Recommended P
Failure Mode Of Panel -
SAFETY NOTICE
46 inch FHD LCD PUBLIC DISPLAY
REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES
ANY PERSON ATTEMPTING TOSERVICE THIS CHASSIS MUST FAMILIARIZE HIMSELF WITH THE CHASSIS
AND BE AWARE OF THE NECESSARY SAFETY PRECAUTIONS TO BE USED WHEN SERVICING ELECTRONIC
EQUIPMENT CONTAINING HIGH VOL TAGES.
CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.
Published by Philips Consumer Lifestyle Copyright reserved Subject to modification
Scaler Diagram & C.B.A. -----------------------------45~53
PCBA photos-------------------------------------------------120
GB
Troubleshooting------------------------------------------------8
Service Tool-----------------------------------------------25~26
BDL4681XU/00
Apr 09 2010

Important Safety Notice
Proper s ervic e and repair is important to the safe, reliable
operation of all Philips Consumer Electronics Company
equipment. The service procedures recommended by Philips and
described in this service manual a re effective methodsof
performing service ope rations .Someof these service
operations require the us eof tools speciall y desi gned for the
purpose. The special tools should be used when and as
recomm ended.
It is im portant to note that this m anual c ontains various
CAUTI ONS and NOTICES which should becarefully read in
order to m inimize the risk of personal injury to service
personnel . The possibility exis ts that improper service
methods may damage the equipment . It is also important to
underst and that these CAUTIONS and NOTICES ARE NOT
EXHAUSTIVE. Philips coul d not possibly know, evaluate and
advise the servic etrade of all conceivable ways i n which
service might be done or of the possible hazardous
consequences of each way. Consequently, Philips has not
undertaken any such broad evaluation. Accordingly,
who uses a servi ce procedure or tool which is not
recommended by Philipsmust first satisfy himself thoroughly that
neither his safety nor the safeoperation of the equipment will
be jeopardized by the service method selected.
* * Hereafter throughout this manual, PhilipsConsumer
Electronics Company will be referred to as Philips.**
Critical components having special safety characteristics are
identified with a by the Ref. No. in the parts list and
enclosed within a broken line
(where several critical components are grouped in one area)
along with the safety symbol on the schematics or
exploded views.
Use of substitute replacement parts whic h do not have the
same speci fied safety characteristics may create shock, fire,
or other hazards .
Under no circums tances should the original design be
modified or altered without written permission from Philips.
Philips assumes no liability, express or implied, arising out of
any unauthorized modification of design.
Servicer assumes all liability.
WARNING
Take care during handling the LCD module with backlight
unit
- Must mount the module using mounting holes arranged in four
corners.
- Do not press on the panel, edge of the frame strongly or electric
shock as this will result in damage to the screen.
- Do not scratch or press on the panel with any sharp objects, such
as pencil or pen as this may result in damage to the panel.
- Protect the module from the ESD as it may damage the electronic
circuit (C -MOS).
-Make certain that treatment body are grounded through
wrist band.
- Do not leave the module in high temperature and in areas of high
humidity for a long time.
- Avoid contact with water as it may as hort circuit within the module.
-If the surface of panel become dirty, please wipe it off with a soft
material. (Cleaning with a dirty or rough cloth may damage the
panel.)
FOR PRODUCTS CONTAINING LASER :
DANGER - Invisible laser radiation when open.
AVOID DIRECT EXPOSURE TO BEAM.
CAUTION - Use of controls or adjustments or
performance of procedures other than
those specified herein may result in
hazardous radiation exposure.
CAUTION - The use of optical instruments with this
product will increase eye hazard.
TO ENSURE THE CONTINUED RELIABILITY OF THIS
PRODUCT, USE ONLYORIGINAL MANUFACTURER'S
REPLACEMENT PAR TS, WHICH ARE LISTED WITH THEIR PART
NUMBERS IN THE PARTS LIST SECTION OF THIS
SERVICE MANUAL.
2
B DL 4681X U LC D

BDL4681XU LCD 3
Technical Data
Samsung panel Interface Requirement
LCD Panel LTI460AA04
LCD size 46” inch
Display Resolution 1366(H) x 768(V)
Pixel Pitch 0.7455x0.7455 mm
Viewing Angle R/L 178 degree (min)/ UD178
degree (min)
Display Response Time (Tr+Tf) 8 ms (G-to-G)
Display Color 16.7M (8bits)
Contrast Ratio 3000:1(Typ)
Luminance 700 cd/m2 (Typ.)
Surface 3H, Haze44%
Features
Max & Native Panel Resolution 1366 x 768 @ 60
Hz
8-bit 162 MHz ADC Yes
Picture in Picture(PIP) Yes
3D comb-filter, 3D De-interlace Yes
Fully Programmable White Balance
functions Yes
Enhanced H & V Sharpness Yes
PC Auto Phase adjustment and Auto Mode
Detect Yes
Advanced video enhance. noise reduction Yes
RS232 control in and out Yes
Screen saver with image sticking protection Yes
VGA input and output Yes
Display wall support up to 5x5 Yes
Remote control lock in OSD Yes
Front panel keypad lock Yes
Scheduling Yes
HDMI Overscan Yes
Auto Adjustment Yes
Power Requirement
Built-in AC power boardPower Supply
By pass AC plug-in for external BOX PC
Power Cable Detachable AC power cord
Power Supply Voltage AC power adaptor: 90~264V AC
50/60Hz
Power Consumption Power ON mode: < TBD W
Standby mode: < 1 W
Off mode < 1 W
DPMS Support
Power Saving Mode <1 W
Power Control On/off control via IR/RS232/Push button
Configuration
External Connector Input Output
Power (AC)
Power hard switch
1+1
0
VGA (D-sub) 1
1
DVI 1
0
Audio (PC) 0 1
HDMI 1
0
Component (YPbPr) 1
1
Audio (RCA/YPbPr)
2 2
x1
RS232 1
1
AV (VIDEO)
BNC/CBVS
1 1
S-Video 1
0
Environment Requirement
Operating Condition
Operating Temperature Temperature 0 to 40 degrees ℃
Humidity Relative Humidity: 85%@50℃
(non-condensing)
Altitude 0 meter to +3000 meters above sea
level
Storage Condition
Temperature Temperature-20 to 60 degree ℃
Humidity Relative Humidity: 10~85%@50℃
(non-condensing)
Altitude 0 meter to 12,000 meters above sea level

4BDL4681XU LCD
Installation
Rear View
ʳ
1. ENTER/VIDEO SOURCE button
• Use this button to select the input source.
• When the On Screen Display menu is active, use this as the SET button.
2. MENU button
• Use this button to engage the On Screen Display menu.
• When the On Screen Display menu is active, use this button to return to
the previous menu.
3. button
• When the On Screen Display menu is active, use these as the
UP/DOWN menu buttons.
• Press and hold the and buttons simultaneously for 3 seconds
to lock or unlock all buttons.
4. button
• When the On Screen Display menu is active, use these as the
PLUS/MINUS menu buttons.
5. POWER button
Use this button to turn the monitor on or put the monitor to standby.
6. Power indicator
Indicates the operating status of the monitor:
- lights green when the monitor is turned on
- lights red when the monitor is in standby mode
- blinks red when the monitor enters DPMS mode
- off when the main power of the monitor is turned off
7. Mount PC installation holes
Install a mount PC using these holes and M4 screws. (Maximum load:
2kg)
8. Carrying handle
Use these handles when carrying the monitor by hand.
9. Cable retainer installation holes
Install the cable retainer using these holes.
10. Remote control sensor, ambient light sensor and power
indicator
• Receives command signals from the remote control.
• Detects the ambient lighting condition around the monitor.
• Indicates the operating status of the monitor:
- lights blue when the monitor is turned on
- lights amber when the monitor is in standby mode
- blinks blue when remote control signal is received
- blinks amber when the monitor enters DPMS mode
- off when the main power of the monitor is turned off1
2 3 4 5 8 8 6 77Input/ Output Terminals
1. AC IN (5.5 A)
Connect the supplied power cord to the wall outlet.
2. Main power switch
Press to switch the main power on/off.
3. AUDIO IN (AUDIO1)
Connect to the audio output of a computer.
4. AUDIO OUT R/L
Outputs the audio signal from the AUDIO IN (AUDIO1/AUDIO2/AUDIO3)
or HDMI jack.
5. SPEAKERS R/L
Outputs the audio signal from the AUDIO IN (AUDIO1/AUDIO2/AUDIO3)
or HDMI jack to external speakers.
6. AUDIO IN (AUDIO2/AUDIO3)
Connect to the audio output of an AV device.
7. VIDEO IN (HDMI)
Connect to the HDMI output of an AV device or connect to the DVI-D
output of a PC. (Using a DVI-HDMI cable)
8. VIDEO IN (DVI-D)
Connect to the DVI-D output of a PC or connect to the HDMI output of an
AV device (Using a DVI-HDMI cable).
9. VGA OUT
Outputs the VGA signal from the VGA IN jack.
10. VGA IN
Connect to the VGA output of a computer.
11. RS232C (OUT/IN)
RS232C network connection input/output for the use of loop through
function.
12. VIDEO IN (COMPONENT)
Component video input (YPbPr) for connecting to the component output
of an AV device.
13. VIDEO IN (S-VIDEO)
S-Video input for connecting to the S-Video output of an AV device.
14. VIDEO OUT
Outputs the video signal from the VIDEO IN jack.
15. VIDEO IN
Connect to the video output of an AV device or another BDL4681XU
monitor. 1 2 3 4 5 6 7 8 10 11 12 9 13 15 3 4 5 6 87 9 10 11 13 12 14 15
16

BDL4681XU LCD 5
Installation
Remote Control
POWER button
Press to switch on the monitor from
standby mode. Press again to turn it
off to standby mode.
SMART button
To select smart picture mode from:
•HIGHBRIGHT: for moving image
such as Video
•STANDARD: for images (factory
setting)
•sRGB: for text based images
•CINEMA: for movies.
•CUSTOM: use your own picture
setting. The mode is automatically
selected after you change the
settings in the PICTURE menu.
VIDEO SOURCE button
To activate the video source selection
menu. Press it repeatedly to select
the video input source from HDMI,
DVI-D,VGA,COMPONENT,
S-VIDEO, and VIDEO.
AUDIO SOURCE button
To activate the audio source selection
menu. Press it repeatedly to select
the video input source from HDMI,
AUDIO 1,AUDIO 2, and AUDIO 3.
Picture format button
To switch screen aspect ratio
between FULL,NORMAL,
DYNAMIC,CUSTOM,REAL, and
21:9.PIP (Picture In Picture) buttons
•ON/OFF button: To turn PIP mode ON/OFF.
• INPUT button: To select the input signal for the sub-picture.
• CHANGE button: To exchange between the main picture and
sub picture.
Note: The “PIP” mode does not work if the screen size is set to
“CUSTOM”, “DYNAMIC”, “REAL” or “21:9”.
CONTRAST button
Press to open the CONTRAST OSD selection, and then press the PLUS
or MINUS button to adjust the value.
BRIGHTNESS button
Press to open the BRIGHTNESS OSD selection, and then press the
PLUS or MINUS button to adjust the value.User Manual BDL4681XU
DISPLAY button
To turn on/off the setting information displayed on the upper right corner
of the screen.
MENU button To turn the OSD menu on/off.
UP button
• To move the highlight bar up to adjust the selected item when OSD
menu is on.
• To move the sub-picture up in “PIP” mode.
DOWN button
• To move the highlight bar down to adjust the selected item when OSD
menu is on.
• To move the sub-picture down in “PIP” mode.
PLUS button
• To increase the adjustment with OSD menu.
• To move the sub-picture right in “PIP” mode.
MINUS button
• To decrease the adjustment with OSD menu.
• To move the sub-picture left in “PIP” mode.
SET button
To activate the setting with OSD menu.
AUTO ADJUST button
Note: For the VGA input only.
To execute the AUTO ADJUST function.
EXIT button
To turn to the previous OSD menu.
MUTE button
To turn the mute function on/off.
VOL UP button
To increase the audio output level.
VOL DOWN button
To decrease the audio output level.
Package Contents
1. LCD monitor
2. Remote control with batteries
3. CD-ROM (EDFU and SICP)
4. Quick Start Guide
5. PHILIPS logo
6. BNC-to-RCA adapter (x 2)
7. RCA-to-BNC adapter (x 3)
8. Cable retainer (x 2)
9. Power cords
10. VGA cable
11. Main switch cover

6BDL4681XU LCD
Installation
CONNECTING EXTERNAL EQUIPMENT (DVD/VCR/VCD)
USING COMPONENT VIDEO INPUT
1. Connect the green-colored (labeled as "Y") jack of the device to the
green-colored "Y" jack of the monitor.
2. Connect the blue-colored (labeled as "Pb") jack of the device to the
blue-colored "Pb" jack of the monitor.
3. Connect the red-colored (labeled as "Pr") jack of the device to the
red-colored "Pr" jack of the monitor.
4. Connect the red (R) and white (L) audio jacks of the device to the
AUDIO IN (AUDIO2 or AUDIO3) jacks of the monitor.
USING S-VIDEO INPUT
1. Connect the S-Video connector of the external device to the S-VIDEO
input of the monitor.
2. Connect the red (R) and white (L) audio jacks of the device to the
AUDIO IN (AUDIO2 or AUDIO3) jacks of the monitor.
USING VIDEO INPUT
1. Connect the Video connector of the external device to the VIDEO IN
input of the monitor. Use the supplied BNC-to- RCA adapter if
necessary.
2. Connect the red (R) and white (L) audio jacks of the device to the
AUDIO IN (AUDIO2 or AUDIO3) jacks of the monitor.

USING HDMI INPUT
Connect the HDMI connector of the external device to the HDMI input of
the monitor.
CONNECTING A PC
USING VGA INPUT
1. Connect the 15-pin VGA connector of the PC to the VGA IN connector
of the monitor.
2. Connect the audio cable to the AUDIO IN (AUDIO1) input of the
monitor.
USING DVI INPUT
1. Connect the DVI-D connector of the PC to the DVI-D connector of the
monitor.
2. Connect the audio cable to the AUDIO IN (AUDIO1) input of the
monitor.

BDL4681XU LCD 7
Installation
USING HDMI INPUT
1. Connect the DVI connector of the PC to the HDMI connector of the
monitor.
2. Connect the audio cable to the AUDIO IN (AUDIO1) input of the
monitor.
EXTERNAL AUDIO CONNECTION
CONNECTING EXTERNAL SPEAKER
1. Connect the speaker wires to the external speaker (SPEAKERS)
output of the monitor.
2. Turn on the monitor.
Note: Before connecting the speaker wires to the monitor, turn off your
monitor.
CONNECTING EXTERNAL AUDIO DEVICE
Connect the red (R) and white (L) audio jacks of the external audio device
to the AUDIO OUT R/L jacks of the monitor
CONNECTING ANOTHER BDL4230E MONITOR
You can interconnect multiple BDL4681XU monitors to create a
daisy-chain configuration for applications like a video wall.
Note: The number of displays that can be used in a daisy-chain
configuration will depend on the resolution of the input signal being
used.
• Connect the VGA OUT connector of the monitor to the VGA IN
connector of another BDL4681XU monitor.
• Connect the RS232C OUT connector of the monitor to the RS232C IN
connector of another BDL4681XU monitor.
• Connect the VIDEO OUT connector of the monitor to the VIDEO IN
connector of another BDL4681XU monitor

8 BDL4681XU LCD
Troubleshooting
Symptom Possible Cause Remedy
No picture is displayed
1. The power cord is disconnected.
2. The main power switch on the back of the monitor is
not switched on.
3. The selected input has no connection.
4. The monitor is in standby mode in VGA mode..
1. Plug in the power cord.
2. Make sure the power switch is switched on.
3. Connect a signal connection to the monitor
Interference displayed on the
monitor or audible noise is heard
Caused by surrounding electrical appliances,
cars/motorcycles or fluorescent lights.
Move the monitor to another location to see is the
interference is reduced.
Color is abnormal The signal cable is not connected properly Make sure that the signal cable is attached firmly to
the back of the monitor.
Picture is distorted with abnormal
patterns
1. The signal cable is not connected properly.
2. The input signal is beyond the capabilities of
the monitor.
1. Make sure that the signal cable is attached firmly.
2. Check the video signal source to see if it is
beyond the range of the monitor. Please verify its
specifications with this monitor’s specification
section..
Display image doesn’t fill up the
full size of the screen The zoom mode is not correctly set.
Use the ZOOM MODE or CUSTOM ZOOM function
in the SCREEN menu to fine tune display geometry
and time frequency parameter.
Can hear sound, but no picture Improperly connected source signal cable. Make sure that both video inputs and sound inputs
are correctly connected.
Can see picture but no sound is
heard
1. Improperly connected source signal cable.
2. Volume is turned all the way down.
3. MUTE is turned on.
4. No external speaker connected
1. Make sure that both video inputs and sound
inputs are correctly connected.
2. Use VOL UP/VOL DOWN button to hear sound.
3. Switch MUTE off by using the MUTE button.
4. Connect external speakers and adjust the
volume to a suitable level.
Some picture elements do not
light up Some pixels of the display may not turn on.
This monitor is manufactured using an extremely
high level of precision technology: however,
sometimes some pixels of the monitor may not
display. This is not a malfunction.
After-Images can still be seen on
the monitor after the monitor is
powered off. (Examples of still
pictures include logos, video
games, computer images, and
images displayed in 4:3 normal
mode)
A still picture is displayed for an over extended
period of time
Do not allow a still image to be displayed for an
extended period of time as this can cause a
permanent after-image to remain on the monitor.

BDL4681XU LCD 9
On-Screen Display
Description of the On Screen Displayʳ
What is the On-Screen Display?ʳ
On-Screen Display (OSD) is a feature in all Philips LCD monitors. It allows an end user to adjust screen performance or
select functions of the monitors directly through an on-screen instruction window. A user friendly on screen display interface
is shown as below:
Picture Menu
BRIGHTNESS
Adjust the overall image brightness by changing the intensity of the LCD
panel’s backlight.
Use the PLUS/MINUS button to adjust.
CONTRAST
Adjust to sharpen the picture quality. The black portions of the picture
become richer in darkness and the white become brighter.
Use the PLUS/MINUS button to adjust.
SHARPNESS
Adjust to improve detail.
Use the PLUS/MINUS button to adjust.
BLACK LEVEL
Adjust to change the image brightness.
Use the PLUS/MINUS button to adjust.
NOISE REDUCTION
Note: For VIDEO, S-VIDEO, COMPONENT and HDMI inputs with
interlaced video only.
Adjust to remove the noise in the image. You can select a suitable noise
reduction level.
Use the PLUS/MINUS button to make selection.
TINT
Note: For VIDEO, S-VIDEO, COMPONENT, and HDMI inputs only.
Adjust to change the color tint of the image.
Use the PLUS/MINUS button to adjust. Press the PLUS button and the
flesh tone color becomes greenish. Press the MINUS button and the flesh
tone color becomes purplish.
COLOR
Note: For VIDEO, S-VIDEO, COMPONENT, and HDMI inputs only.
Adjusts to increase or decrease the intensity of colors in the image.
Press the PLUS button to increase color intensity, or press the MINUS
button to decrease color intensity.
COLOR TEMPERATURE
Select a color temperature for the image. The image looks reddish with a
lower color temperature, and looks bluish with a higher color temperature.
Use the PLUS/MINUS button to make selection.
COLOR CONTROL
Note: This function is only available when COLOR TEMPERATURE is
set to USER.
With this function you can adjust the color tones of the image precisely
by changing the R (Red), G (Green) and B (Blue) settings independently.
Press the SET/PLUS button to open the submenu. Press the UP/DOWN
button to select R,Gor B, and press the PLUS/MINUS button to adjust.
LIGHT SENSOR
Choose to enable or disable the ambient light sensor. Once enabled, the
image brightness will be adjusted automatically when ambient lighting
condition changes.
Use the PLUS/MINUS button to make selection.
SMART CONTRAST
When turned on, this function helps enhance image contrast when
displaying dark scenes.
Use the PLUS/MINUS button to make selection.
VIDEO SOURCE
Select a video input source.
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to toggle between
• HDMI •DVI-D •VGA
•COMPONENT •S-VIDEO •VIDEO
PICTURE RESET
Reset all settings in the PICTURE menu.
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to make selection. Select YES and press the SET
button to restore settings to factory preset values. Press the EXIT button
to cancel and then return to the previous menu.

10 BDL4681XU LCD
On-Screen Display
Screen Menu
H POSITION
Note: For the VGA input only.
Adjust the horizontal placement of the picture.
Press the PLUS button to move the image to the right, or press the
MINUS button to move the image to the left.
V POSITION
Note: For the VGA input only.
Adjust the vertical placement of the picture.
Press the PLUS button to move the image up, or press the MINUS button
to move the image down.
CLOCK
Note: For the VGA input only.
Adjust the width of the image.
Press the PLUS button to expand the width of the image, or press the
MINUS button to shrink the width of the image.
CLOCK PHASE
Note: For the VGA input only.
Adjust to improve the focus, clarity and stability of the image.
Use the PLUS/MINUS button to adjust.
ZOOM MODE
The pictures you receive may be transmitted in 16:9 format (widescreen)
or 4:3 format (conventional screen). 16:9 pictures sometimes have a
black band at the top and bottom of the screen (letterbox format).
This function allows you to optimize the picture display on screen. The
following zoom modes are available:
•FULL - This mode restores the correct proportions
of pictures transmitted in 16:9 using the full screen
display.
•NORMAL - The picture is reproduced in 4:3 format
and a black band is displayed on either side of the
picture.
•DYNAMIC - Fill the entire screen by stretching 4:3
pictures non-proportionally.
•CUSTOM - Choose to apply the custom zoom
settings in the CUSTOM ZOOM submenu.
•REAL - This mode displays the image
pixel-by-pixel on the screen without scaling the
original image size.
•21:9 - The picture is enlarged to 16:9 format. This
mode is recommended when displaying pictures that
have black bands at the top and bottom (letterbox
format).
CUSTOM ZOOM
Note: This item is only available when the ZOOM MODE setting is set to
CUSTOM.
You can use this function to further customize the zoom settings to suit
the image you want to display.
Press the SET/PLUS button to open the submenu. Use the UP/DOWN
button to toggle between the following items, and use the PLUS/MINUS
button to adjust.
•ZOOM - expands the horizontal and vertical
sizes of the image simultaneously.
•HZOOM - expands the horizontal size of the
image only.
•VZOOM - expands the vertical size of the
image only.
•H POSITION - moves the horizontal position of
the image left or right.
•V POSITION - moves the vertical position of
the image up or down
SCREEN RESET
Reset all settings in the SCREEN menu.
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to make selection. Select YES and press the SET
button to restore settings to factory preset values. Press the EXIT button
to cancel and then return to the previous menu.

BDL4681XU LCD 11
On-Screen Display
ʳ
AUDIO MENUAU
DIOVOLUMEMUTEAUDIOʳ
ʳ
VOLUME
Adjust to increase or decrease the audio output level.
Use the PLUS/MINUS button to adjust.
MUTE
To turn the mute function on/off.
Use the PLUS/MINUS button to make selection.
AUDIO SOURCE
To select the audio input source according to the audio signal source
connected to the audio input and HDMI sockets on the monitor
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to toggle between
•AUDIO1 •AUDIO 2
•AUDIO3 •HDMI
SPEAKER
Set the monitor to play audio using the built-in (internal) speakers or
external speakers (if connected).
Use the PLUS/MINUS button to toggle between
•INTERNAL •EXTERNAL
•LINE-OUT
AUDIO RESET
Reset all settings in the AUDIO menu.
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to make selection. Select YES and press the SET
button to restore settings to factory preset values. Press the EXIT button
to cancel and then return to the previous menu.
PIP MENU
Note: for COMPONENT, VGA, DVI-D and HDMI inputs only.
PIP SIZE
Select the size of the sub picture in the PIP (Picture-in-Picture) mode.
Use the PLUS/MINUS button to toggle between
•LARGE •MIDDLE •SMALL
PIP AUDIO
Select the audio source in the PIP (Picture-in-Picture) mode.
Use the PLUS/MINUS button to toggle between
• MAIN - select audio from the main picture
• PIP - select audio from the sub picture.
PIP RESET
Reset all settings in the PIP menu.
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to make selection.
Select YES and press the SET button to restore settings to factory preset
values. Press the EXIT button to cancel and then return to the previous
menu.
Note: the PIP function is only available under certain signal source
combinations as shown in the table below.

12 BDL4681XU LCD
On-Screen Display
ʳ
CONFIGURATION 1 MENUCONFIGURATION
AUTO ADJUST
Note: For the VGA input only.
Use this function to let the monitor automatically optimize the display of
VGA input image.
Press the SET button to adjust.
POWER SAVE
Set the monitor to reduce the power automatically.
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to toggle between
•RGB - Select ON to let the monitor enter DPMS mode when no signal
can be detected from the HDMI, DVI-D, and VGA inputs three
times in a row. Use the PLUS/MINUS button to make selection.
•VIDEO - Select ON to let the monitor enter power saving mode when no
signal is detected from the VIDEO, S-VIDEO, and
COMPONENT inputs three times in a row. Use the
PLUS/MINUS button to make selection.
LANGUAGE
Select the language for the OSD menu.
Use the PLUS/MINUS button to select a language.
PANEL SAVING
Choose to enable the panel saving functions to reduce the risk of the
"image persistence”. Press the SET/ PLUS button to open the submenu,
and then press the UP/DOWN button to toggle between
•COOLING FAN - Set the working pattern of the monitor’s internal
cooling fan. Select AUTO and the cooling fan will only
be activated when the monitor reaches a certain
temperature. Select ON and the cooling fan will work
constantly when the monitor power is on. Use the
PLUS/MINUS button to make selection.
•BRIGHTNESS - Select ON and the brightness of the image will be
reduced to an appropriate level, and the BRIGHTNESS
setting in the PICTURE menu will become unavailable.
Use the PLUS/MINUS button to make selection.
• PIXEL SHIFT - Select the time interval for the monitor to slightly
expand the image size and shift the position of pixels in
four directions (up, down, left, and right). Use the
PLUS/MINUS button to make selection (OFF-900
seconds from current time).ʳʳ
ʳ
COLOR SYSTEM
Select the color system depending on the input video format. Use the
PLUS/MINUS button to toggle between
•AUTO •PAL4.43 •PAL 3.58
•SECAM •NTSC4.43 •NTSC 3.58
CONFIGURATION RESET
Reset all settings in the CONFIGURATION 1 menu.
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to make selection. Select YES and press the SET
button to restore settings to factory preset values. Press the EXIT button
to cancel and then return to the previous menu.
FACTORY RESET
Reset all settings in the PICTURE,SCREEN,AUDIO,PIP,
CONFIGURATION 1,CONFIGURATION 2, and ADVANCED OPTION
menus. Press the SET/PLUS button to open the submenu, and then
press the UP/DOWN button to make selection. Select YES and press the
SET button to restore settings to factory preset values. Press the EXIT
button to cancel and then return to the previous menu.
CONFIGURATION 2 MENUCONFIGURATIONʳ
OSD TURN OFF
Set the period of time the OSD menu stays on the screen. (from 5to 120
seconds)
Use the PLUS/MINUS button to adjust.
OSD MODE
Select the orientation of the OSD according to the orientation the monitor
is installed.
Use the PLUS/MINUS button to toggle between
•PORTRAIT •LANDSCAPE
INFORMATION OSD
Set the period of time the information OSD stays on the screen. The
information OSD will display when input signal is changed.
Use the PLUS/MINUS button to adjust. The information OSD will not
appear when OFF is selected. If 0is selected, the information OSD will
remain on the screen.
SLEEP TIMER
Set the monitor to turn itself off to standby mode within an amount of time
you specify. (OFF-24 hours from current time) Use the PLUS/MINUS
button to adjust. Note: When the SLEEP TIMER is activated, the
SCHEDULE settings will be disabled.
OSD H POSITION
Adjust the horizontal position of the OSD menu.
Use the PLUS/MINUS button to adjust.
OSD V POSITION
Adjust the vertical position of the OSD menu.
Use the PLUS/MINUS button to adjust.
MONITOR INFORMATION
Displays the information about your monitor, including model name, serial
number, operating hours and software version. Press the SET button to
view the information.
Press the EXIT button to return to the previous menu.

BDL4681XU LCD 13
On-Screen Display
ADVANCED OPTION MENUADVANCED
INPUT RESOLUTION
Note: For the VGA input only.
Set the resolution of the VGA input. This is only required when the
monitor is unable to detect the VGA input resolution correctly.
Use the PLUS/MINUS button to toggle between
•AUTO •1024x768 •1280x768
•1360x768 •1366x768
BLACK LEVEL EXPANSION
Note: For VIDEO, S-VIDEO, COMPONENT, and HDMI (video mode)
inputs only.
Select a suitable black level expansion setting to reveal more details in
the dark parts of an image.
Use the PLUS/MINUS button to toggle between
•OFF •LOW
•MIDDLE •HIGH
GAMMA SELECTION
Select a display gamma value to best suit the image and optimize image
brightness and contrast.
Use the PLUS/MINUS button to toggle between
•2.0 •2.2 •NATIVE
SCAN MODE
Note: for VIDEO, S-VIDEO, COMPONENT, and HDMI (video mode)
inputs only.
Change the display area of the image.
Use the PLUS/MINUS button to toggle between
• OVERSCAN - display about 95% of the original size of the image. The
rest of the areas surrounding the image will be cut off.
• UNDERSCAN - display the image in its original size.
SCAN CONVERSION
Note: For VIDEO, S-VIDEO, COMPONENT, and HDMI (video mode)
inputs only.
Choose to enable or disable the IP (Interlace to Progressive) conversion
function.
Use the PLUS/MINUS button to toggle between
•PROGRESSIVE - Enable the IP conversion function (recommended).
Once enabled, the interlace input signal will be converted to progressive
format for better display quality.
•INTERLACE: Disable the IP function. This mode is suitable for
displaying motion pictures, but it increases the chance of image retention.
FILM MODE
Note: For VIDEO, S-VIDEO, COMPONENT, and HDMI (video mode)
inputs only.
Choose to turn on or off the film mode frame conversion function.
Use the PLUS/MINUS button to toggle between
• AUTO - Enable the film mode frame conversion function for movies
and motion pictures. The monitor converts a 24 frames-per-second (24
fps) input signal format to DVD video signal format. Once this function is
enabled, it is recommended that you set the SCAN CONVERSION
function to PROGRESSIVE.
• OFF - Disable the film mode frame conversion function. This mode is
suitable for TV broadcasting and VCR signals.
IR CONTROL
Select the operation mode of the remote control when multiple
BDL4681XU monitors are connected via the RS232C connection.
Press the SET/PLUS button to open the submenu, and then press the
UP/DOWN button to toggle between
• NORMAL - All monitors can be operated normally by the remote
control.
• PRIMARY - Designate this monitor as the primary monitor for remote
control operation. Only this monitor can be operated by the remote
control.
•SECONDARY - Designate this monitor as the secondary monitor. This
monitor can not be operated by the remote control, and will only receive
the control signal from the primary monitor via the RS232C connection.
•LOCK - Lock the remote control function of this monitor. To unlock,
press and hold the DISPLAY button on the remote control for 5 seconds.
KEYBOARD CONTROL
Choose to enable or disable the function of the keyboard (control buttons)
on the monitor.
Use the PLUS/MINUS button to toggle between
•LOCK - Disable the keyboard.
•UNLOCK - Enable the keyboard.
TILING
Note: For the VGA input only.
With this function you can create a single large screen matrix (display
wall) that consists of up to 25 BDL4681XU monitors (5 monitors each on
the vertical and horizontal sides). This requires you to connect each
BDL4681XU monitor in a daisy-chain configuration.
Example:
•H MONITORS - select the number of monitors on the horizontal side.
•V MONITORS - select the number of monitors on the vertical side.
•POSITION - select the position of this monitor in the screen matrix.
•FRAME COMP - choose to turn on or off the frame compensation
function. If turned on, the monitor will adjust the image to compensate for
the width of the monitor bezels in order to accurately display the image.
•ENABLE: Choose to enable or disable the TILING function. If enabled,
the monitor will apply the settings in H MONITORS,V MONITORS,
POSITION, and FRAME COMP.
Note: the PIP function will be disabled when the TILING function is
enabled, and vice versa.
HEAT STATUS
This function allows you to check the thermal status of the monitor at any
time. The accuracy of the temperature indicated is 5 degrees. Press the
SET button to view the heat status. Press the EXIT button to return to the
previous menu
DATE AND TIME
Adjust current date and time for the monitor’s internal clock. Press the
PLUS button to open the submenu. Press the UP/DOWN button to toggle
between the YEAR,MONTH,DAY,HOUR,MINUTE, and DAYLIGHT
SAVING TIME settings, and then press the PLUS/MINUS button to
adjust.

14 BDL4681XU LCD
On-Screen Display
SCHEDULE
Note: You should set up current date and time in DATE AND TIME before
using this function.
This function allows you to program up to seven different scheduled time
intervals for the monitor. You can select the time the monitor turns on and
turns off, the days in a week the monitor is activated, and which input
source the monitor will use for each scheduled activation period.
1. Press the SET button to open the submenu.
2. Press the UP/DOWN button to select a schedule item (item 1 through
item 7), and then press the PLUS button.
3. With the ON item highlighted, press the SET button and then press the
UP/DOWN button to set the hour when the monitor will be turned on,
then press the PLUS button to move to the minute slot to set the
minute. If you do not want to use a power on time, select "--" for the
hour slot, and "00" for the minute slot.
4. Press the EXIT button, and then press the PLUS button to highlight the
OFF item. Press the SET button, and then press the UP/DOWN button
to set the hour when the monitor will be turned off, then press the
PLUS button to move to the minute slot to set the minute. If you do not
want to use a power off time, select "--" for the hour slot, and "00" for
the minute slot.
5. Press the EXIT button, and then press the PLUS button to highlight the
INPUT item, and then press the UP/DOWN button to select an input
source. If no input source is selected, the default input source (VIDEO)
will be used.
6. Press the PLUS button to select what days in a week this schedule
item will be take effect, and then press the SET button.
7. If you want to set up more schedule items, press the EXIT button and
then repeat the steps above. A check mark in the box next to the
number of the schedule item indicates that the selected schedule is in
effect.
Notes:
• The selection of EVERY DAY within a schedule item takes priority over
other schedules that are set up to operate weekly. • When schedule items
overlap, scheduled power on time has priority over scheduled power off
time. • If there are two schedule items programmed for the same time,
then the highest numbered schedule has priority.
MONITOR ID
Set the ID number for controlling the monitor via the RS232C connection.
Each monitor must have an unique ID number when multiple
BDL4681XU monitors are connected. Use the PLUS/MINUS button to
select a monitor ID.
DDC/CI
Choose to turn ON or OFF the DDC/CI communication function. Select
ON for normal use. Use the PLUS/MINUS button to make selection.
SMART POWER
Set the monitor to reduce the power automatically.
Use the PLUS/MINUS button to toggle between
•OFF •MIDDLE •HIGH
AUTO SIGNAL DETECTION
Choose to let the monitor detect and display available signal sources
automatically.
• ON - set the monitor to display the image automatically once a signal is
connected.
•OFF - once a signal is connected, it can only be selected manually. Use
the PLUS/MINUS button to make selection.
ADVANCED OPTION RESET
Reset all settings in the ADVANCED OPTION menu. Press the
SET/PLUS button to open the submenu, and then press the UP/DOWN
button to make selection. Select YES and press the SET button to restore
settings to factory preset values. Press the EXIT button to cancel and
then return to the previous menuˁ

BDL4681XU LCD 15
Philips Pixel Defect Policy
Philips' Flat Panel Displays Pixel Defect Policy
Philips strives to deliver the highest quality products. We use some of the
industry's most advanced manufacturing processes and practice stringent
quality control. However, pixel or sub-pixel defects on the PDP / TFT panels
used in Plasma- & LCD- displays are sometimes unavoidable. No
manufacturer can guarantee that all panels will be free from pixel defects,
but Philips guarantees that any Plasma- & LCD- displays with an
unacceptable number of defects will be repaired during the warranty period
in line with your local guarantee conditions. This notice explains the different
types of pixel defects and defines the acceptable defect level for the
BDL4681XU LCD screen. In order to qualify for repair under warranty, the
number of pixel defects must exceed a certain level which is given in the
reference table. If the LCD screen is within specification a warranty
exchange / claim back will be refused. Additionally, because some types or
combinations of pixel defects are more noticeable than others, Philips sets
even higher quality standards for those.
Pixels and Sub pixels
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.
Types of Pixel Defects + Dot Definition
Pixel and sub-pixel defects appear on the screen in different ways. There are
three categories of pixel defects and several types of sub-pixel defects within
each category.
Dot definition = What is a defective "Dot"? : One or more defective,
adjacent sub-pixel are defined as one "dot". The no. of defective sub-pixels
are not relevant to define a defective dot. This means that a defective dot
can consist of one, two or three defective sub-pixels which can be dark or lit.
Bright Dot Defects
Bright dot defects appear as pixels or sub-pixels that are always lit or "on".
These are the examples of bright dot defects:
One lit red, green or
blue sub-pixel Two adjacent lit sub-pixels:
- Red + Blue = Purple -
Red + Green = Yellow
- Green + Blue = Cyan
(Light Blue)
Three adjacent lit
sub-pixels (one white
dot)
Dark Dot Defects
Black dot defects appear as pixels or sub-pixels that are always dark or "off".
These are the examples of black dot defects
One dark dot l Two adjacent dark
dots = 1 pair of dark
dots
Two dark dots,
specifications defines
the minimum distance
between dark dots
Proximity of Pixel Defects
Because pixel and sub-pixels defects of the same type that are nearby one
another may be more noticeable, Philips also specifies tolerances for the
proximity of pixel defects. In the table below you can find specifications
about:
• Allowed amount of adjacent dark dots = (adjacent dark dots =1 pair of dark
dots)
• Minimum distance between dark dots
• Total no. of all defective dots
Pixel Defect Tolerances
In order to qualify for repair due to pixel defects during the warranty period, a
PDP / TFT panel in a Philips Plasma / LCD- display must have pixel or
sub-pixel defects exceeding the tolerances listed in the following table.
BRIGHT DOT EFFECT ACCEPTABLE LEVEL
MODEL BDL4681XU
1 lit sub pixel 3
Distance between two bright dot defects* 5mm
BLACK DOT EFFECT ACCEPTABLE LEVEL
1 dark sub pixel 9
Distance between two dark dot defects* NA
TOTAL DOT DEFECTS OF ALL TYPES 10
Note: * 1 or 2 adjacent sub pixel defects = 1 dot defect

16 BDL4681XU LCD
Mechanical Instruction
Preparation before disassemble
1. Clean the room for disassemble
2. Identify the area for monitor
3. Check the position that the monitors be placed and the quantity of the monitor; prepare the area for material flow;
according to the actual condition plan the disassemble layout
4. Prepare the implement, equipments, material as bellow:
1) Working table
2) Electric screw-driver (#2)
3) Manual screw-driver (#1)
4) Hex screw-driver
5) Glove
6) Cleaning cloth
7) ESD protection
item picture Operation Tool Notes
1. Disassemble the low cover.
Æ7-M3 screws
Electric screw
drive #2
2 Tear off the wire from
ÆTransfer BD
Key pad BD
3 1. Tear off an acetic tape.
2.Disassemble the Transfer BD
from low cover
Æ2-M3 screws
3.Disassemble the IR BD from
low cover
Æ2-M3 screws
4.Disassemble the key pad BD
from low cover
Æ3-M2 screws
Electric screw
drive #2
Screw drive #1
4 Disassemble the fan from low
cover
Æ4-T5 screws
Electric screw drive #2

BDL4681XU LCD 17
Mechanical Instruction
5 Disassemble the back cover
from display back
Æ13-M3 screws
Electric screw drive #2
6 Tear off the all wire from
Æpower BD*8
MainBD*8
Power SW BD *3
Color engine BD *3
Audio BD*1
7 1. Disassemble the power BD
(*2)from display
Æ12-M3 screws
Electric screw drive #2
8 2. Disassemble the power bkt
from display
Æ4-M3 screws
Electric screw drive #2
9 1. Disassemble the chassis
from display
Æ2-M3screws
2. Draw out the chassis from
display
Electric screw
drive #2

18 BDL4681XU LCD
Mechanical Instruction
10 1. Disassemble Main BD /
Audio BD
Æ1-M3 screws
5-T3screws
10-Hex screws
Electric screw
drive #2
Hex screw drive
11 1. Disassemble the BD from
chassis
(1)Main BDÆ5-M3 screws
(2)Color engine BDÆ4-M3
screws
(3)Audio BDÆ4-M3 screws
(4)Power sw BDÆ4-M3 screws
(5)Ground screw *1
Electric screw
drive #2
12 1. Tear off 4pcs wire holder
2. Tear off AC socket wird
13 1. Disassemble the handle from
right cover
Æ4-M8 screws
Electric screw drive #2
14 1. Disassemble the right cover
from display right
Æ2-M4 screws
7-M3screws Electric screw drive #2
15 1. Disassemble the fan from
right cover
Æ4-T5 screws Electric screw
drive #2

BDL4681XU LCD 19
Mechanical Instruction
16 1. Disassemble the handle from
right cover
Æ4-M8 screws
Electric screw drive #2
17 1. Disassemble the right cover
from display right
Æ2-M4 screws
7-M3screws Electric screw drive #2
18 1. Disassemble the fan from
right cover
Æ4-T5 screws Electric screw
drive #2
19 1. Disassemble the L&R
support BKT
Æ12-M5 screws Electric screw
drive #2
20 1. Disassemble the fan from L
support BKT
Æ2-M3 screws Electric screw
drive #2
21 1. Disassemble the fan from L
support BKT
Æ2-M3 screws
Electric screw drive #2

20 BDL4681XU LCD
Color Adjustment
Color adjustment
(1)Input source set the YPbPr (VGA / DVI / HDMI) input
(2)After ADC Calibration
(3)Set the picture mode to standard mode at user OSD
(4)Set input timing to SDTV480P with“80% white” pattern
(5)Enter factory OSD, select Color Temp Turning .
(6) Use CA210 read the color coordinate.
(7)Adjust the Red, Green, Blue driver to let the color coordinate to meet
the table1 spec.
(8)Setup the pattern to “30% white” pattern.
(9)Adjust the Red, Green, Blue offset to let the color coordinate to meet
the table1 spec
(10)Go to step (6) until the 30% and 80% white pattern meet the table 1
spec.
(11)Do step (1) to (10) to get the drive/offset values of10000°KColor
Temperature
(12)Set the same drive/offset values of 10000°K Color Temperature to
9300°K
(13)Do step (1) to (10) to get the drive/offset values of 6500°KColor
Temperature
(14) Set the same drive/offset values of 6500°K Color Temperature to
5800°K
Video Color adjustment
(1) Input source set the CVBS1 ( CVBS2 / S-Video ) input.
(2) Set the picture mode to standard mode at user OSD.
(3) Setup input timing to NTSC with“80% white” pattern
(4) Enter factory OSD, select Color Temp Turning
(5) Use CA210 read the color coordinate.
(6) Adjust the Red, Green, Blue driver to let the color coordinate to meet
the table1 spec.
(7) Setup the pattern to “30% white” pattern.
(8) Adjust the Red , Green , Blue offset to let the color coordinate to
meet the table1 spec
(9) Go to step (5) until the 30% and 80% white pattern meet the table 1
spec.
(10) Do step (1) to (9) to get the drive/offset values of10000°KColor
Temperature
(11) Set the same drive/offset values of 10000°K Color Temperature to
9300°K
(12) Do step (1) to (9) to get the drive/offset values of 6500°KColor
Temperature
(13) Set the same drive/offset values of 6500°K Color Temperature to
5800°K
Screen Uniformity
Fig 7.1 Optical measurement point
(1) Timing: SDTV480P @ 60Hz , YPbPr source
(2) DEFAULT the unit and select the ANSI BRIGHTNESS GRID
pattern .
(3) Change the unit to MAX/MAX for Contrast/Black level , Color
temperature default setting 9300°K.
(4) Surface luminance is luminance value at point 1 across the LCD
surface 50cm from the surface with all pixels displaying white. From
more information see Fig. 7.1 . When VDDB =24V,IDDB = 16.5 A.
LWH=Lon1, Where Lon1 is the luminance with all pixels displaying
white at center 1 location. just for reference , no spec.
(5) Position the CA-210 at the locations indicated on the grid , there are
5 points see Fig 7.1 . Measure and Record the values when the
GRID is OFF.
(6) Panel spec brightness minimum 550 nits , typical 700 nits ,
Luminance Variation 1.3(Max). The variation in surface luminance,
WHITE is defined under 100% brightness as:
δWHITE(9P)=Maximum(Lon1, Lon2,…,Lon9)/Minimum(Lon1,
Lon2,…Lon9)
Spec and Table list
(1) Reference: The variance of color coordinate via Red, Green, Blue :
X Y
Red drive ↓x ↓-
Green drive ↓- Y ↓
Blue drive ↓x ↑Y ↑
Red offset ↑x ↑-
Green offset ↑- Y ↑
Blue offset ↑x ↓Y ↓
(2) Table 1-1,1-2,1-3 : Color temperature spec
User OSD (black level=50, contrast = 50) when VGA
、
DVI
、
HDMI(PC
mode) input
User OSD (black level =50, contrast = 50) when YPbPr
、
HDMI(Video
mode) input
User OSD (black level =50, contrast = 50) when CVBS、S-Video
input
Table 1-1
Color temp item
@factory OSD
CVBS1 / CVBS2 / S-VIDEO / VGA /
YPbPr / DVI / HDMI
Color temperature 10000°K
x 0.278±0.015
y 0.291±0.015
Table 1-2
Color temp item
@factory OSD
CVBS1 / CVBS2 / S-VIDEO / VGA /
YPbPr / DVI / HDMI
Color temperature 9300°K
x 0.283±0.015
y 0.298±0.015
Table 1-3
Color temp item
@factory OSD
CVBS1 / CVBS2 / S-VIDEO /
VGA / YPbPr / DVI / HDMI
Color temperature 6500°K
x 0.312±0.015
y 0.329±0.015