Philips BDL4221V/00 User manual

Horizontal frequencies
30 - 63kHz
Service
Service
Service
TABLE OF CONTENTS
Published by BCU Monitors Printed in suzhou Copyright reserved Subject to modification F May .23 2006
Description Page
Important Safety Notice---------------------------------- 2
Technical Data/Installation----------------------------3~7
On-Screen Display------------------------------------8~11
Aging Mode/OSD LOCK/UNLOCK--------------------12
Trouble shooting-------------------------------------15~17
Failure Mode Of Panel-----------------------------------18
Factory Mode/Warning message-----------------13~14
Safety Test Requirements ------------------------------19
Mechanical Instructions----------------------------20~21
Electrical Instructions-------------------------------22~25
Display adjustment----------------------------------26~27
DDC DATA/Instructions-----------------------------28~36
ISP Instructions --------------------------------------37~38
Block Diagram---------------------------------------------39
Description Page
Scaler Diagram--------------------------------------40~55
Scaler Board C.B.A---------------------------------56~57
Power Diagram/C.B.A -----------------------------58~60
IR&Control Diagram/C.B.A -----------------------61~62
DSUB Diagram/C.B.A------------------------------63~65
Tuner Diagram/C.B.A------------------------------66~68
Exploded View -------------------------------------------69
Recommended/Spare parts list -----------------70~75
Circuit description---------------------------------------76
Repair Tips-------------------------------------------77~78
General product specification------------------79~123
Different Parts List-------------------------------------124
Updated for 420WN6QS-----------------------125~126
Revision List--------------------------------------------127
REFER TO BACK COVER FOR IMPORTANT SAFETY GUIDELINES
CAUTION: USE A SEPARATE ISOLATION TRANSFORMER FOR THIS UNIT WHEN SERVICING.
ANY PERSON ATTEMPTING TO SERVICE 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 VOLTAGES.
SAFETY NOTICE
GB 3138 106 10490
BDL 42" LCD Monitor/TV
BDL4221V/00
BDL4221V/27
BDL4221VS/00
420WN6QS/93
420WN6QS/97

Important Safety Notice
2420WN6 LCD TV
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Proper service and repair isimportant to the safe, reliable
operation of all HPConsumer Electronics Company**
Equipment. The service procedures recommended by HP and
described in this service manual are effective methods of
performing service operations. Some ofthese service
operations require the use of tools specially designed for the
purpose. The special tools should be used when and as
recommended.
It is important to note that this manual contains various
CAUTIONS and NOTICES which should be carefully read in
order to minimize the risk of personal injury to service
personnel. The possibility exists that improper service
methods may damage the equipment. It is also important to
understand that these CAUTIONS and NOTICES ARE NOT
EXHAUSTIVE. HP could not possibly know, evaluate and
advise the service trade of all conceivable ways in which
service might be done or of the possible hazardous
consequences of each way. Consequently, HP has not
undertaken any such broad evaluation. Accordingly, a
servicer who uses a service procedure or tool which is not
recommended by HP must first satisfy himself thoroughly that
neither his safety nor the safe operation of the equipment will
be jeopardized by the service method selected.
* * Hereafter throughout this manual, HP Consumer
Electronics Company will bereferred to as HP.
Critical components having special safety characteristics are
identified with a bythe Ref. No. inthe 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 which do not have the
same specified safety characteristics may create shock, fire,
or other hazards.
Under no circumstances 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.
*BrokenLine
WARNING
Take care during handling the LCD module with backlight
unit
- Must mount the moduleusing mounting holes arranged infour
corners.
- Do not press onthe panel, edge of theframe strongly or electric
shock as this will result in damage to the screen.
- Do not scratch orpress on the panel withany sharp objects, such
as pencil or pen asthis may result in damage to the panel.
- Protect the module fromthe ESD as it maydamage the electronic
circuit (C-MOS).
- Make certain that treatment person s body are grounded through
wrist band.
- Do not leave themodule in high temperature andin areas of high
humidity for a long time.
- Avoid contact with water as it may ashort circuit within the module.
- If the surface ofpanel 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 ONLY ORIGINAL MANUFACTURER'S
REPLACEMENT PARTS, WHICH ARE LISTED WITH THEIR PART
NUMBERS IN THE PARTS LIST SECTION OF THIS
SERVICE MANUAL.

3
Technical Data 420WN6 LCD TV
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1. General
1.1. Product description
This 42 LCD TV Monitor is specified as a display peripheral with PC
analog video signal input and includes TV/ DTV function with 42 TFT
LCD display.
Horizontal scan range is 30~63KHz and refresh range is 50~75 Hz.
This scan range allows it to display resolution up to 1366x768
non-interlaced at 60 Hz refresh rate. The image can be adjusted
through OSD control; these adjustments can be stored on a board
memory including 12 factory pre-set modes.
1.2 Destination: WE (PAL B/G/D/K/I ; SECAM L/L? )
1.3 Basic data
1.3.1 LCD panel
1.3.1.1 LPL Panel
Type NO : LC420W02 B6 (Supplier LPL)
Display area(mm) : 930.25mm x 523.01mm
Number of Pixels : 1366(H) x 768(V)
Pitch ( mm ) : 0.227mm(H) x 0.681mum(V)
Color pixel arrangement : RGB vertical stripe
Display operating mode : Normally black
Color depth : 16,777,216 colors ( 8 bits)
Brightness (cd/m^2) : 500(Center 1 points, Typ.)
Viewing angle(CR>10) : Viewing angle free(R/L 178(Typ.),
U/D 178(Typ.))
Surface treatment : Hard coating(3H),Anti-glare treatment of
the front polarize
Electrical interface : LVDS
Response Time (ms, Typ) : TrR:8,TrD:10(Gray to Gray)
Contrastratio :Typical1100:1withAI
Outline Dimension : 1006 mm(H) x 610 mm(V) x 56(D) mm (Typ.)
Module weight (g) : 11,800(Typ.)
Backlight : 20 CCFL
1.3.2. Power supply
AC-input : 90V ~ 264VAC,50/60±2Hz
Power consumption : 140W/Typ(at PC mode),220W/Typ
(atTVmode).
Power cord length : 1.8M
Power cord type : European type and UK type
Power indicator : LED (On: Blue ,Sleeping mode: Amber )
Auto power saving : < 5W
"
"
1.3.3. Horizontal scan : 30 ~ 63KHz
1.3.4. Vertical scan : 50 ~ 75 Hz
1.3.5. Input signals
1.3.5.1 PC Signal type
a. Analog Video : 15 pin D-Sub
0.7 Vp-p linear, positive polarity and
separate Sync ( TTL level, positive or negative polarity )
b. Audio signal : Mini-jack audio input
c. Signal source : Pattern generator format refer to the SPEC
d. Reference generator : CHROMA 2135 or 2250
1.3.5.2 TV Signal type: (Video Model : without RF signal input)
Signal type Video signal Audio signal Remark
Composite Input / Output
SCART connector
Input / output, L /R
SCART connector
R,G,B Input
SCART connector
Input
SCART connector
CVBS Input
RCA connector, Yellow
Share with S-Video
S-Video Input
S-terminal, Black
Input, L/R
RCA connector, white,
Red
Component
Y, Pb, Pr
Input
RCA connector,
Green, Blue, Red
Input, L/R
RCA connector, white,
Red
CVBS Output Output ( from CVBS )
RCA connector, Yellow
Output ( from CVBS ),
L/R
RCA connector, white,
Red
DVI IN Digital TV signal support
HDCP
DVI connector
Input, VGA audio in
RF Signal Antenna input or Cable input * Option
1.3.6 PC input connectors
A. PC Analog Video input with D-SUB connector
D-SUB Pin assignment
Signal interface
1.8M 15 Pins, D-SUB male.
Sync polarity
-Hori. sync positive/negative
-Vert. sync positive/negative
PIN No. SIGNAL b(PC)
1Red
2Green
3Blue
4GND
5GND
6RedGND
7GreenGND
8BlueGND
9 +5V (Supply from PC)
10 Sync GND
11 GND
12 Bi-directional data
13 H-sync
14 V-sync
15 Data clock

4420WN6 LCD TV
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B. Output analog D-sub connector pin assignment
PIN No. SIGNAL
1 Red_OUT
2 Green_OUT
3 Blue_OUT
4GND
5GND
6RedGND
7GreenGND
8BlueGND
9GND
10 Sync GND
11 GND
12 GND
13 H-sync_OUT
14 V-sync_OUT
15 GND
C. DVI-D : Pin assignment (for PC DVI and Video HDCP)
Signal interface
- 1.8M 24 Pins, DVI-D male.
Signal type - Digital interface with 4 channels TMDS signal
(2) PC Audio input with 3.5 Mini stereo jack
Specification
Audio L/R input
-Nominal :0.5Vrms.
- Maximum : 1.5 V rms.
-Impedance > 10 k ? .
1.3.7 TV video input /output connectors
(1 ) TV Tuner with RF connector (Option)
TV Input from Aerial or Cable
Specification
Pin No. Description
1RX2-
2RX2+
3GND
4GND
5GND
6 DDC clock
7 DDC data
8GND
9RX1-
10 RX1+
11 GND
12 GND
13 GND
14 +5V
15 GND
16 +5V
17 RX0-
18 RX0+
19 GND
20 GND
21 GND
22 GND
23 RXC+
24 RXC-
-AerialorCable
- Impedance 75 ohm.
(2) HD / Component Y Pb Pr with RCA connector ( Video , Audio input )
Specification
Video - Y : 700mV, Pb, Pr, : ±350mV,
- Impedance : 75ohm
Audio: L/R input
- Nominal : 0.5 V rms.
- Maximum : 1.5 V rms.
- Impedance > 10 kohm.
Note : the input will be overloaded when the signal > 1.5 V rms.
(3) S-Video with S terminal (Video, Audio input)
Specification
Video - Y : 1Vpp , C : 300 mV pp
- Impedance : 75ohm.
Audio L/R input (share with Composite Audio input)
-Nominal :0.5Vrms.
- Maximum : 1.5 V rms.
- Impedance > 10 kohm.
Note : the input will be overloaded when the signal > 1.5 V rms.
(4) CVBS input with RCA Jack (Video, Audio input)
Specification
Video - CVBS Source signal 1 Vpp
- Impedance : 75ohm.
Audio L/R input (share with S-Video Audio input)
-Nominal :0.5Vrms.
- Maximum : 1.5 V rms.
-Impedance > 10 kohm.
Note : the input will be overloaded when the signal > 1.5 V rms.
(5) CVBS output with RCA Jack (Video, Audio output
from CVBS source)
Specification
Video - CVBS output. 1 Vpp ( from TV Tuner )
- Impedance : 75ohm.
Audio L/R output ( from TV Tuner )
- Nominal : 0.5 V rms.
- Maximum : 1.5 V rms.
-Impedance < 1Kohm.
(6) SCART ( Video , Audio input /output ) this is for WE model only
Specification
Video - CVBS Source signal 1 Vpp
Impedance : 75ohm.
-Y:1Vpp,C :300mVpp
Impedance : 75ohm.
- RGB source signal 1Vpp
Impedance : 75ohm
Audio L/R input (share with S-Video Audio input )
- Nominal : 0.5 V rms.
- Maximum : 1.5 V rms.
-Impedance > 10 kohm.
(7) DVI input with DVI connector, support HDCP
Specification
Video - Digital interface with 4 channels TMDS signal
- Impedance : 100ohm.
Audio L/R input
- Nominal : 0.5 V rms.
- Maximum : 1.5 V rms.
-Impedance > 10 Kohm.
(8) Headphone with 3.5 mm stereo jack
Specifications : L/R Output
10 mW / 32 ohm
Note : Headphones with impedance between 8 ~ 600ohm
when headphone plug is connected, loudspeaker
sound is muted.
Technical Data

5
Installation 420WN6 LCD TV
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Side View(left)
1 INPUT Selecting input source
2. Increaseor decreasethechannelnumberor
moving up or down to highlight thefunction in OSD
3. Increaseor decreasethelevelofaudio volumeor
moving left or right to highlight thesub-menu in the
selected function ofOSD
4. OpentheOSDorconfirm theselected function
5. DC powerswitch On/Off
Menu
Side View(Right)
1Audio input for compositeinput Audio (leftandright)in put for
compo sitesignal in put.
2 Compositeinput Composite(CVBS) signal input
3S-Video input S-Video signal input
4 Earphoneoutput Earphoneoutput
5TVtunerTVtuner input (availablein TV
version only)
Rear View
1 ACin ACpowerin
2ACpowerACpowerswitch
3Speakers output External speakers output
4D-Sub output PC analog D-Sub output
5 DVI-D input PC digital input
6D-Sub input PC analog D-Sub input
7RS232 input RS232 network connection Input
8RS232 output RS232 network connection output for theuseof
loop through function
9PCaudio PC stereoaudio input
10 Audio input for component signal Audio (leftandright)input
for component signal input
11 Component input Component (YPbPr )signal input
12 Compositeoutput Composite(CVBS) output for theuse
ofloop through function
13 Audio output for compositeoutput Audio (leftandright)out put
for compo sitesignal out put.
14 External / EURO-AV SCARTconnection (for theuseof
European modelonly)
15 Kensington lock Kensington lock

6420WN6 LCD TV
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Installation
Accessory Pack
Unpack all the parts
Power cable Remote control &batteries
DVI-D Cable VGA signal cable
Setting up and connecting your monitor/TV
CAUTION: Ensure that the power to the monitor/TV is switched off before
The installation.
- Connecting the monitor/TV
l Connect the cables to the rear of your monitor/TV according to the
numbers:
TV model
-ConnecttoPC
l Connect the cables to the back of your computer by following step 1~5.
l If your monitor displays the computer image the installation has been
completed successfully.
l If installation was not successful, see the Troubleshooting section.
l For installation of the monitor driver for Microsoft Windows® , see
the Monitor Driver Installation section
(Getting Started).
- Connect to DVD/VCD/VCR
Connect to DVD/VCR/VCD through S-VIDEO
l Connect to DVD/VCR/VCD through S-VIDEO
Connect to DVD/VCR /VCD through SCART (for Europe only)
Connect to DVD/VCR /VCD through composite video (CVBS)
Connect to DVD/VCR /VCD through component video (YPbPr)

7
Installation 420WN6 LCD TV
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Connecting to Cable TV
Antenna
Progressive video and HDTV connections for digital high-definition picture

8420WN6 LCD TV
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Philips' LCD Panel Pixel Defect Policy
Philips strives to deliver the highest quality products.We use some of the
industry's most advanced manufacturing processes and practise
stringent quality control. However, 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.
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 coloredsubpixels
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
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 Bright dot defects appear as pixels or sub pixels that
are always lit or 'on'. That is, a bright dot is a sub-pixel that stands out on
the screen when the monitor displays a dark pattern.
There are the types of bright dot defects:
One lit red, green or blue
sub pixel Twoadjacentlitsubpixels:
- Red + Blue = Purple
- Red + Green = Yellow
- Green + Blue = Cyan (Light Blue)
Three adjacent lit sub
Pixels (one white pixel)
A red or blue bright dot must be more than 50 percent brighter
than neighboring dots while a green bright dot is 30 percent
brighter than neighboring dots.
Black Dot Defects Black dot defects appear as pixels or sub pixels that
are always dark or 'off'. That is, a dark dot is a sub-pixel that stands out
on the screen when the monitor displays a light pattern.
These are the types of black dot defects:
One dark sub pixel Two or three adjacent dark sub pixels
Proximity of Pixel Defects
Because pixel and sub pixels defects of the same type that are near to
one another may be more
noticeable, Philips also specifies tolerances for the proximity of pixel
defects.
Pixel Defect Tolerances
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 listed in the following tables.
BRIGHT DOT DEFECTS ACCEPTABLE LEVEL
MODEL 420WN6
1litsubpixel 0
2 adjacent lit sub pixels 0
3 adjacent lit sub pixels (one white pixel) 0
75% ~ 50% of Dot 0
50% ~ Less Dot (Weak Dot) Max 7
Distance between two bright dot defects* N/A
Total bright dot defects of all types 0
Tiny bright dots less then 50% R/B, 30% G Ma
Max4
*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)
*Here in Tiny Bright Dot is defined as "for Red and Blue" the bright area
should be no longer than1/2 sub-pixel and for green the bright area
should be no larger than 1/3 sub-pixel.
BLACK DOT DEFECTS ACCEPTABLE LEVEL
MODEL 420WN6
1 dark sub pixel 5 or fewer
2 adjacent dark sub pixels 1 or fewer
3 adjacent dark sub pixels 0
Distance between two black dot defects* 15 mm or more
Total black dot defects of all types 5 or fewer
TOTAL DOT DEFECTS ACCEPTABLE LEVEL
MODEL 420WN6
Total bright or black dot defects of all types 5 or fewer
Note:
* 1 or 2 adjacent sub pixel defects = 1 dot defect
All Philips monitors are ISO13406-2 Compliant
Philips Pixel Defect Policy

9
On Screen Display 420WN6 LCD TV
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PICTURE
SMART PICTURE FEATURES
pNORMAL PIP
WARM SIZE
qCOOL pOFF
PC MAIN MENU
BRIGHTNESS SMALL
CONTRAST MEDIUM
AUTO ADJUST LARGE
YES qPBP
STORE VIDEO
pYES pTV
qNO AV
MANUAL ADJUST S-VIDEO
PHASE qEXT
CLOCK AUDIO
HORIZON
TAL pPC
VERTICA
LqPIP
DISPLAY
AUDIO pICON1
SMART SOUND ICON2
pMUSIC SOURCE ICON3
THEATRE pPC qICON4
NEWS DVI
q
PERSONA
LTV
SETTINGS AV
TREBLE S-VIDEO
BASS HD
BALANCE qEXT
VIRTUAL
SURROUND ZOOM
pON ZOOM ID
qOFF ZOOM TYPE
AVL pOFF
pYES 4X4
qNO INSTALL 3X3
LANGUAGE 2X2
pENGLISH q1X5
DEUTSCH
FRANÇAIS
1.pc signal control

On Screen Display
10 Magnavox LCD TV
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PICTURE INSTALL
SMART PICTURE LANGUAGE
pSPORTS pENGLISH
MOVIES DEUTSCH
WEAK SIGNAL FRANÇAIS
TV MAIN MENU
NIGHT ITALIANO
MULTIMEDIA ESPAÑOL
qPERSONAL q
BRIGHTNESS MONITOR ID
CONTRAST DCR
COLOR pON
SHARPNESS qOFF
TINT LIGHT SENSOR
AUDIO pON
SMART SOUND qOFF
pMUSIC REMOTE CONTROL
THEATRE pON
NEWS qOFF
qPERSONAL FACTORY RESET
SETTINGS pNO
TREBLE qYES
BASS
BALANCE SETUP
VIRTUAL SURROUND AUTO PROGRAM
pON START
qOFF MANUAL STORE
AVL SYSTEM
pYES pFRANCE
FEATURES qNO qWEST EUROPE
SOURCE pPC
MANUAL
STORE
DVI
HDCP
PROGRAM
NUMBER
TV FINE TUNE
AV STORE
S-VIDEO YES
HD STORE
qEXT pYES
qNO
PICTURE FORMAT CHANNEL SETTING
pAUTOMATIC
CHANNEL
EDIT
4:3 CHANNEL
ZOOM 16:9 SKIP
WIDESCREEN pACTIVATE
qSUPER WIDE qSKIP
PICTURE
ALIGNMENT
CHANNEL
SWAP
AUTO LOCK FROM
LOCK PROGRAM TO
CHANGE CODE EXCHANGE
YES EXCHANGED
2.TV signal control
WE/AP/China

11
On Screen Display 420WN6 LCD TV
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PICTURE SETUP
SMART PICTURE TUNER MODE
pSPORTS pANTENNA
BRIGHTNESS MOVIES CABLE
CONTRAST WEAK SIGNAL qAUTO
TV MAIN MENU
COLOR NIGHT AUTO PROGRAM
SHARPNESS MULTIMEDIA START
TINT qPERSONAL CHANNEL EDIT
AUDIO CHANNEL
SMART SOUND pMUSIC SKIP
THEATRE pACTIVATE
NEWS qSKIP
qPERSONAL MANUAL FINE TUNE
SETTINGS RATING
TREBLE BLOCK OPTION
BASS pON
BALANCE qOFF
VIRTUAL SURROUND pON MOVIE RATING
qOFF GpON
AVL pYES qOFF
qNO PG
FEATURES pPC PG13
SOURCE
DVI
HDCP R
TV NC17
AV X
S-VIDEO
HD TV RATING
qEXT TV Y
TV Y7
PICTURE FORMAT pAUTOMATIC BLOCK
4:3 FV
ZOOM 16:9 TV G
WIDESCREEN TV PG
qSUPER WIDE BLOCK
PICTURE ALIGNMENT V
AUTO LOCK S
LOCK PROGRAM L
CHANGE CODE D
YES TV 14
CLEAR ALL BLOCK
pON V
ZOOM qOFF S
ZOOM ID L
ZOOM TYPE pOFF D
INSTALL 4X4 TV MA
LANGUAGE pENGLISH 3X3 BLOCK
DEUTSCH 2X2 V
FRANÇAIS q1X5 S
ITALIANO L
ESPAÑOL CLOSED CAPTION
NAFTAMODE

12 420WN6 LCD TV
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AGING...
After 55 seconds, bring up:
After 5 seconds, bring up:
AGING...
After 55 seconds, bring up:
----------
----------
repeatly
Connect Signal cable again=> go back to normal display
Access Aging.. Mode
Step 1: Select the source "PC" and then turn off LCD-TV, and disconnect
Interface Cable between Monitor and PC.
Step 2: [Push "power " button and then push the "Left " and "Right"
buttons at the same time immediately and hold it] untill comes out
" AGING screen" then release all buttons.
Bring up:
OSDLock
OSDfunction can be locked by
·Pressing Menu button for more than 10 seconds while there is
video signal in. The screen automatically shows OSD MAIN MENU
LOCKED for 3seconds.
When users press Menu button, OSDLock MENU will appear,
and the default cursor location will be on unlock.
OSDcan be unlocked by
·Pressing front panel Menu button for more than 10 seconds
while there is video signal in. As the menu button is pressed, the
screen will keep showing OSD MAIN MENU LOCKED until OSD
function unlocked. Then, OSD MAIN MENU UNLOCK will
automatically show for 3seconds.
"
"
"
"
"
"
Aging Mode/OSD LOCK/UNLOCK

13
Factory Mode 420WN6 LCD TV
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Access factory.Mode
howto get into factory mode menu
Step1:Select thesource "PC"andthenturnoff LCD-TV.
Step2: [Push "power "buttonandthen push the"VOL-"and"VOL+"
buttons at thesametimeimmediatelyandholdit]aboutfiveseconds
thenreleaseall buttons.
Press "menu"buttonandbringupfactory mode indicationasshown in
Fig.1
Usethe"UP" and"DOWN"to select the"lastline"andthenpress
the"Right"button
MAINCONTROLS
SMARTPICTURE
AUDIO BRIGHTNESS
FEATURES CONTRAST
INSTALL AUTOADJUST
MANUALADJUST
NEWMODE
PICTURE
BDS32*420WN6 EU VO.42.60505OLC32*A6K3*A1
Fig.1
Menu ItemDescription
Scalar Gain R G B Scalar Gain for Normal/Warm/CoolinPC
mode.
Auto-Color Adjustcolor fromreceived signal(either in
PCorHDTV mode).
ADC Offset RGB AdjustAD 9883 for PCADC offset.
ADC Gain R G B AdjustAD 9883 for PCADC gain.
PCOffset RGB PCanalogscalar offset.
711X SDTV Brightness AdjustSA 7119 SDTV brightness.
711X SDTV SAT.AdjustSA 7119 SDTV saturation.
711X SDTV ContrastAdjustSA 7119 SDTV contrast.
711X SDTV TINT AdjustSA 7119 SDTV tint(hue).
TV ShiftHVAdjustTV screenposition
horizontally/vertically.
HDShiftHVAdjustHDTV screenposition
horizontally/vertically.
ShowLock MessageShowOSDlock message.
HDTV ADC Offset RGB AdjustAD 9883 for HDTV ADC offset.
HDTV ADC Gain R G B AdjustAD 9883 for HDTV ADC gain.
Video Scalar Gain R G B Adjustscalar gain for Video mode.
Scalar HueAdjustscalar hue.

Warning Message
14 420WN6 LCD TV
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""
'
1.Automatic adjustment (for factory only)
Press Volume+ and Volume- on front key at the same time (PC mode only). It adjusts PC
image to the best and save the screen automatically.
2.OUTOFRANGE
If PC input timing is out of range, it shows OUT OF RANGE warning message on the center
of the screen. The range of horizontal frequency is between 14 - 63 KHz. The range of vertical
frequency is between 45 - 76 Hz. The OSD won t timeout.
3.NO VIDEO INPUT
When PC input timing has either horizontal frequency or vertical frequency. Or neither has
horizontal frequency nor vertical frequency. It shows on the center of the screen for 30
seconds, then it will enter sleep mode.

15
Trouble Shooting 420WN6 LCD TV
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Common Problems
Symptoms Having this problem? Check these items
No Video/ Power
LED off
No picture, the LCD
Monitor TV is not
working
*Check connection integrity at both ends of the video cable
and/or power cord.
* Electric outlet verification
* Ensure AC power at the rear of the monitor TV is switched on.
No Video/ Power
LED on
No picture or no
brightness
*Increase brightness and contrast controls.
* Perform the LCD Monitor TV self-test feature check.
* Check for bent or broken pins in video cable connector.
Poor Focus Picture is fuzzy,
blurry or ghosting
*Auto adjust image through Menu -> Image Setting -> Auto
Adjust.
*Adjust Phase and Clock controls via OSD.
*Eliminate video extension cables.
*Perform the LCD Monitor TV factory reset (via Menu -> Factory
Reset -> All Settings).
*Lower video resolution or increase font size.
Shaky/Jittery Video Wavy picture or
fine movement
*Auto adjust image through Menu -> Image Setting -> Auto
Adjust
*Adjust Phase and Clock controls via OSD
*Perform the LCD Monitor TV factory reset (via Menu -> Factory
Reset -> All Settings)
*Check environmental factors
*Relocate and test in other room
Missing Pixels LCD screen has spots *Cycle power on-off
* These are pixels that are permanently off and is a natural
defect that occurs in LCD technology
Stuck-on Pixels LCD screen has
bright spots
*Cycle power on-off
* These are pixels that are permanently on and is a natural
defect that occurs in LCD technology
Brightness Problems Picture too dim or
too bright
*Perform the LCD Monitor TV factory reset (via Menu -> Factory
Reset -> All Settings)
*Auto adjust image through Menu -> Image Setting -> Auto
Adjust
*Adjust brightness & contrast controls
Note: When operating in DVI mode, the
contrast adjustment is not available.

16 420WN6 LCD TV
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Trouble Shooting
Geometric Distortion Screen not
centered correctly
*Perform the LCD Monitor TV reset on "Position Settings Only"
*Auto adjust image through Menu -> Image Setting -> Auto
Adjust
*Adjust the centering controls
*Ensure the LCD Monitor TV is in proper video mode
Note: When operating in DVI mode, the
positioning
adjustments are not available.
Horizontal/Vertical
Lines
Screen has one or
more lines
*Perform the LCD Monitor TV reset
*Auto adjust image through Menu -> Image Setting -> Auto
Adjust
*Adjust Phase and Clock controls via OSD
*Check for bent or broken pins in the video cable connector
Note: When operating in DVI mode, the Pixel
Clock and Phase
adjustments are not available.
Sync Problems Screen is
scrambled or
appears torn
*Perform the LCD Monitor TV reset
* Push Auto Adjust button
* Adjust Phase and Clock controls via OSD
* Check for bent or broken pins
* Boot up in the "safe mode"
LCD Scratched Screen has scratches
or
smudges
*Turn the LCD Monitor TV off and clean the screen
Safety Related
Issues
Visible signs of
smoke or sparks
*Do not perform any troubleshooting steps
*The LCD Monitor TV needs to be replaced
Intermittent Problems The LCD Monitor
TV malfunctions
on & off
*Ensure the LCD Monitor TV is in proper video mode
* Ensure video cable connection between computer and the
LCD monitor TV is secured
*Perform the LCD Monitor TV factory reset (via Menu ->
Factory Reset -> All Settings)
* Perform the LCD Monitor TV self-test feature check to
determine if the intermittent problem occurs in self-test mode
TV and Audio Problems
Poor TV signal
reception
Abnormal picture
seen from the
screen
*The proximity of mountains or high buildings may be
responsible for ghost pictures, echoing or shadows. In this
case, try manually adjusting your pictures: see 'fine tuning' or
adjust the direction of the outside aerial.

17
Trouble Shooting 420WN6 LCD TV
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No TV picture No picture when
TV input was
selected
*Have you connected the aerial socket properly? Have you
chosen the right system? Poorly connected SCART cables or
aerial sockets are often the cause of picture or sound problems
(sometimes the connectors can become half disconnected if the
LCD Monitor TV set is moved or turned). Check all
connections.
No sound No sound output
when a program
with sound was
playing
*Ensure that the audio cables are firmly connected to both the
audio input connectors on your the LCD Monitor TV and audio
output connectors on your PC or Video player.
*If on certain TV channels you receive a picture but no sound,
this means that you do not have the correct TV system. Modify
the SYSTEM setting.
Video Problems
No Video No signal indicator
is displayed.
*Check Video Input Selection
Composite: Yellow colored RCA jack
S-Video: Typically a round 4 pin jack
Component: Typically 3 RCA jacks of Green, Red and Blue.
*Make sure you did not plug the video cable to video output port
behind the LCD monitor TV.
Low Quality DVD
playback
Picture not crisp
and some color
distortion
*Check DVD connection
Composite gives good picture
S-Video gives better picture
Component gives best picture
No sound See video but no
audio
*Check if the LCD Monitor TV volume is turn off of muted.
*Connect the audio cable securely.
*Audio cable is connected incorrectly.
*Verify that the audio source is selected correctly in the OSD.
Remote Control Problems
Remote control does
not work properly
No response from
the LCD Monitor
TV when remote
is pressed
*Point the remote control directly at the remote sensor on the
LCD Monitor TV.
* Replace both batteries with new ones.
* Make sure the remote control is not disabled (for
disable/enable the remote control, please refer to the section of
Remote Control).
Product Specific Problems
Screen image is too
small
Image is centered
on screen, but
does not fill entire
viewing area
Perform the LCD Monitor TV factory reset (via
Menu -> Factory Reset -> All Settings).
Cannot adjust the
LCD Monitor TV with
the buttons at the
side of the unit
OSD does not
appear on the
screen
Turn the LCD Monitor TV off and unplug the
power cord and then plug back and power on.

18 420WN6 LCD TV
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Failure description Phenomenon
Vertical block defect
Vertical dim lines
Vertical lines defect
(Always bright or dark)
Horizontal block defect
Horizontal dim lines
Horizontal lines defect
(Always bright or dark)
Has bright or dark pixel
Polarizer has bubbles
Polarizer has bubbles
Foreign material inside
polarizer. It shows liner or
dot shape.
Concentric circle formed
Bottom back light of LCD is
brighter than normal
Back light un-uniformity
Backlight has foreign material.
Black or white color, liner or
circular type
Quick reference for failure mode of LCD panel
this page presents problems that could be made by LCD panel.
It is not necessary to repair circuit board. Simply follow the mechanical
instruction on this manual to eliminate failure by replace LCD panel.
Failure Mode Of Panel

19
420WN6 LCD TV
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All units that are returned for service or repair must pass the
original manufactures safety tests. Safety testing requires both
and testing.Hipot Ground Continuity
HI-POT TEST INSTRUCTION
1.Application requirements
2.
1.1All mains operated products must pass the Hi-Pot test as
described in this instruction.
1.2This test must be performed again after the covers have
been refitted following the repair, inspection or modification
of the product.
2.1Connecting conditions
2.1.1The test specified must be applied between the parallel-
blade plug of the mainscord and all accessible metal
parts of the product.
2.1.2Before carrying out the test, reliable conductive
connections must be ensured and thereafter be
maintained throughout the test period.
2.1.3 The mains switch(es) must be in the "ON" position.
2.2Test Requirements
All products should be HiPot and Ground Continuity tested as
follows:
Test 2820VDC 1700VDC Test current:
voltage (2000VAC)(1200VAC)25A,AC
Test time:
Test time 3 seconds 1second 3 seconds(min.)
(min.) Resistance
required:
Trip set at 100 uA 5 mA <=0.09+Rohm,
current for Max. R is the
(Tester) limitation; set resistance of
at 0.1uA for the mains cord.
Min. Limitation
Ramp set at 2
time seconds
(Tester)
Test method
Condition HiPot Test for HiPot Test for Ground Continuity
products where products where Test requirement
the mains input the mains input is
range is Full 110V AC(USA
range(or 220V type)
AC)
2.2.1The minimum test duration for Quality Control Inspector
must be 1minute.
2.2.2The test voltage must be maintained within the specified
voltage + 5%.
2.2.3 There must be no breakdown during the test.
2.2.4The grounding blade or pin of mains plug must be
conducted with accessible metal parts.
3. Equipments and Connection
3.1. Equipments
For example :
-ChenHwa 9032PROGRAMMABLEAUTO SAFETY
TESTER
-ChenHwa 510BDigital Grounding Continuity Tester
-ChenHwa 901 (ACHi-pot test), 902 (AC,DC Hi-pot test)
Withstanding Tester
3.2.Connection
4. Recording
Hipot and Ground Continuity testing records have to be kept
for a period of 10 years.
*Turn on the power switch of monitor before Hipot and
Ground Continuity testing.
Connect the"video cable"
or "groundingscrew"
to theCLIP onyour tester.
Video cable
(Rear view of monitor)
Connect thepower cord
to themonitor.
Grounding screw
Power outlet
(ChenHwa 9032 tester)
Clip
Clip

20 420WN6 LCD TV
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Mechanical Instructions
Front View
Back view
Remove the base, unscrew the screws
Remove all the screws on the four sides
After unscrew all the screws ,rise the back cover slowly and carefully
then you will see the following picture. you should disconnect all the
connector carefully and the remove the back cover.
Remove the scaler board and power board and TV BOX
Unscrew all the screws and disconnect the connectors on the power
board and unscrew the screws on the side as shown in following