LCD L46A9-AK User manual

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SERVICE MANUAL
FOR LCD TV L46A9-AK
TFT-LCD TV
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CONTENTS
1 CONTENTS ----------------------------------------------------------------------------2
2 Product Code Illumination and Series Introduction----------------------3
3 Main Unit Description---------------------------------------------------------------4
4 Features--------------------------------------------------------------------------------52
5Connection Sketch Interpretation---------------------------------------------53
6CircuitDiagram----------------------------------------------------------------------56
7Introduction to Circuit Boards-----------------------------------------------77
8BUS Control Adjustment-------------------------------------------79
9Exploded View------------------------------------------------------------------------84
10 BOM LIST------------------------------------------------------------------------------------------85

3
2. Product Code illumination and Series Introduction
L46A9-AK
LCD
Model series of cabinet Numbe
r
Screen size: 46inch
The code of the en
g
ine core

Front panel Control
Buttons and functions
1Channel number increase and decrease.
2Volume decrease:
for lowering the volume or adjusting
the menu.
Volume increase:for enhancing the
volume or adjusting the menu.
3TV/AV button
4Menu button
5Power and indicator: for turning on or
off the power supply.
6Remote receiving window
7Card jack
- This is a simplified representation of front panel.
- Here shownmay be somewhatdifferent from your TV.
Buttons and interface location
4
- CH + - VOL + TV/AV MENU POWER
Buttons and functions
1Channel number increase and decrease.
2Volume decrease:
for lowering the volume or adjusting the menu.
Volume increase:
for enhancing the volume or adjusting the menu.
3TV/AV button Source view button
4MENU button
5ENTER return to the Previous menu.
6Power and indicator: for turning on or off the
power supply.
7Remote receiving window
8Card jack
- CH + - VOL + TV/AV MENU ENTER
3 Main Unit Description

DVI Input
Connect the monitor output
connector from a PC to the
appropriate input port.
Antenna Input
Connect cable or
antenna signals to
the TV, either directly
or through your
cable box.
External Speaker
(8 ohm Output)
Connect to optional
external speaker(s).
DVD/DTV Input
(Component )
Connect a component
video/audiodevice to
these jacks.
Audio/Video Input
S-Video Input
Connect audio/video or
S-Video out from an
audio/video or S-Video
device to these jacks.
Buttons and interface location
Rear panel Control
EXT Subwoofer:
Subwoofer audio output
terminal.
Audio input
for linking DVI or
other appliance audio
frequency output terminals.
Video/Audio output
terminal
Connect ordinary video/audio
or other appliance
audio input terminals.
VGA Input
Connect the monitor
output connector from
a PC to the jack
5
VIDEO
L
AUDIO
R
POWER
Power Cord Socket
This TV operates on AC power.
The voltage is indicated on
the specifications page.
Never attempt to operate the
TV on DC power
Switch power on/off
USB Socket
AUDIO Input
connect to hear
stereo sound froman
external device.
VIDEO Input
Connects the videosignal
from a videodevice.
AUDIO
AV IN
AV OUT
AUDIO AUDIO
DVI IN
COMPONENT IN
AUDIO
VGA IN
ANT IN
DVI
VGA S-VIDEO Pr/Cr Pb/Cb Y L R VIDEO L R
AUDIO VIDEO L R
AUDIO OUT
R L
WOOFER
Audio input
for linking PC or
other appliance audio
frequency output terminals.
Earphone jack
Earphone Audio output
terminal

Rear panel Control
Power Cord Socket
This TV operates on AC power.
The voltage is indicated on
the specifications page.
Never attempt to operate the
TV on DC power
Switch power on/off
Buttons and interface location
DVI Input
Connect the monitor output
connector from a PC to the
appropriate input port.
Antenna Input
Connect cable or
antenna signals to
the TV, either directly
or through your
cable box.
External Speaker
(8 ohm Output)
Connect to optional
external speaker(s).
DVD/DTV Input
(Component )
Connect a component
video/audiodevice to
these jacks.
Audio/Video Input
S-Video Input
Connect audio/video or
S-Video out from an
audio/video or S-Video
device to these jacks.
EXT Subwoofer:
Subwoofer audio output
terminal.
Audio input
for linking DVI or
other appliance audio
frequency output terminals.
Video/Audio output
terminal
Connect ordinary video/audio
or other appliance
audio input terminals.
VGA Input
Connect the monitor
output connector from
a PC to the jack
AUDIO
AV IN
AV OUT
AUDIO AUDIO
DVI IN
COMPONENT IN
AUDIO
VGA IN
ANT IN
DVI
VGA S-VIDEO Pr/Cr Pb/Cb Y L R VIDEO L R
AUDIO VIDEO L R
AUDIO OUT
R L
WOOFER
Audio input
for linking PC or
other appliance audio
frequency output terminals.
Earphone jack
Earphone Audio output
terminal
USB jack
6

Remote controller
Precautions
Battery loading
1.Slide open the cover of the battery compartment on the back of the remote controller.
2.Load two 7# (AAA)alkaline batteries in the compartment. (plus and minus poles to
respective mark)
3.Replace the cover of the battery compartment.
Make sure that there is no obstacle
between the remote controller and
television set.
As strong light may interfere the
signals, change your position to
operate the remote controller if
the television cannot be turned
on or off as you expect.
Keep the remote controller away from
heat source or humid area to ensure
effective performance of the remote
controller.
Make sure that two AA alkaline batteries
are loaded. The batteries must be of the
same type. The batteries must be
located properly. The batteries are not
rechargeable.
7
3
2
1

DISPLAY
POWER
MUTE STILL
I/II
PIC.SIZE
TV/AV
S-VIDEO
DVD/DTV PC/DVI
OK
Q.VIEW
CH+
CH-
VOL- VOL+
MENU
PSM
123
456
789
-/-- 0
ZOOM/MOVE
USB
PIP SWAP SCAN
CH.EDIT
SHUTTLE
SLEEP
H.LOCK
TIME.SKIP
ZOOM
RETURN
S
SM
HELPENTER
Remote controller key function
TV/VIDEO
MUTE
Switches the sound on or off.
NUMBER buttons
Picture still
S-Video mode
select S-Video.
VOLUME UP/DOWN
Increases/decreases
the sound level.
POWER
Turns your TV or any other
programmed equipment on
or off, depending on mode.
USB system buttons
PC/DVI mode
Select PC/DVI mode.
DVD mode
Select DVD mode
Q.VIEW
Return to the last channel
viewed.
MENU
Brings up the main menu
to the screen.
CHANNEL UP/DOWN
Selects available channels
found with Auto search.
CHANNEL select
is not available
OK button
Information display
Display of current channel
signals, program and systems
Picture mode option
Normal, Soft,
Bright, Personal
Sound mode option
, Personal,
Standard, Music
Theater
Program edit
no available
Sleep button
Nicam select button
Time skip button
H.clock button
Shuttle button
Scan
scan program
8
PIC. SIZE button
picture scale
PIP mode buttons
(no available)
PIP: PIP select
Swap: main picture and
sub picture exchange
Zoom/Move: no available

DISPLAY
POWER
MUTE STILL
I/II
PIC.SIZE
TV/AV
S-VIDEO
DVD/DTV PC/DVI
OK
Q.VIEW
CH+
CH-
VOL- VOL+
MENU
PSM
123
456
789
-/-- 0
ZOOM/MOVE
USB
PIP SWAP SCAN
CH.EDIT
SHUTTLE
SLEEP
H.LOCK
TIME.SKIP
ZOOM
RETURN
SSM
HELPENTER
9
above
below
20
20
left right
front 8m
45 45
Ensure the remote controller is pointed toward the remote controller
windows on the display.
No obstacles should be placed between the remote controller and the
remote controller window.
The effective receiving scope for the signal is 8 meters to the front of
00
the remote controller windows, and 45 to the left or right side and 20
above or below the control windows.
Use of remote controller:
1. To ensure a normal operation, the remote controller should not be
dropped or damaged in any way .
It should also be kept dry and away from all heat sources.
2. Battery replacement is necessary when the remote controller acts
inconsistently or stops operating the display.
Effective range of remote controller
Effective range

ANT IN
External Equipment Connections
Note
* It is recommended that you'd better use 75
* Don't bind antenna cable and electric wire together.
coaxial cable to remove the
disturbance caused by airwave.
outdoor
antenna
300 twin-lead cable
Antenna adapter
75 coaxial cable
Plug
(additional purchase)
Antenna input
75 standard
coaxial type
- Antenna or Cable Service without a Cable Box Connections
- For optimum picture quality, adjust antenna direction if needed.
To improve picture quality in a poor signal area, purchase
and install a signal amplifier.
If the antenna needs to be split for two Tv`s, install a 2-
WaySignal Splitter in the connections.
If the antenna is not installed properly, contact your dealer
for assistance.
10

DVI-DTV OUTPUT R AUDEO L
RGB-DTV OUTPUT R AUDEO L YPbPr R AUDEO
AUDIO AUDIO
DVI IN
COMPONENT IN
AUDIO
VGA IN
DVI
VGA Pr/Cr Pb/Cb Y L R
AUDIO
AV IN
AUDIO
COMPONENT IN
S-VIDEO
Pr/Cr Pb/Cb Y L R VIDEO L R
DVD setup
How to connect
1. Connect the DVD video outputs (Y, Pb/Cb,
Pr/Cr) to the COMPONENT (Y, Pb/Cb, Pr/Cr)
INPUT jacks on the TV and connect the DVD
audio outputs to the AUDIO INPUT jacks on
the TV, as shown in the figure.
2. If your DVD only has an S-Video output
jack, connect this to the S-VIDEO input on
the TV and Connect the DVD audio outputs
to the AV IN jacks on the TV, as shown in the
figure.
NOTE: If your DVD player does not have
component video output, use S-Video.
How to use
1. Turn on the DVD player, insert a DVD.
2. Use the S-Video button on the remote
control to select S-VIDEO mode.
3. Press Play button on external equipment
for program play.
4. Refer to the DVD player's manual for
operating instructions.
External Equipment Connections
DVD
or
DTV setup
-To watch digitally broadcast programs,
purchase and connect a digital set-top box.
How to connect
Use the TV`s COMPONENT (Y, Pb/Cb,
Pr/Cr) INPUT jacks, VGA or DVI port for
video connections, depending on your set-
top box connections available. Then, make
the corresponding audio connections.
How to use
1. Turn on the digital set-top box. (Refer to
the owner`s manual for the digital set-top
box.)
2. Use PC/DVI on the remote control to
select PC or DVI (Y, Pb/Cb, Pr/Cr) mode.
3. Press Play button on external
equipment for program play.
Digital Set-top Box
or or
11

AUDIO
DVI IN
AUDIO
VGA IN
DVI
VGA
PC setup
How to connect
1. Use the TV`s VGA IN or DVI (Digital Visual Interface) IN port for video connections, depending on
your PC connector.
If the graphic card on the PC does not output analog and digital RGB simultaneously, connect only
one of either VGA IN or DVI INPUT to display the PC on the TV.
If the graphic card on the PC does output analog and digital RGB simultaneously, set the TV to either
VGA or DVI; (the other mode is set to Plug and Play automatically by the TV.)
2. Then, make the corresponding audio connection. If using a sound card, adjust the PC sound as
required.
How to use
1. Turn on the PC and the TV.
2. Turn on the display by pressing the POWER button on the TV's remote control.
3. Use PC/DVI on the remote control to select PC or DVI source.
4. Check the image on your TV. There may be noise associated with the resolution, vertical pattern,
contrast or brightness in PC mode. If noise is present, change the PC mode to another resolution,
change the refresh rate to another rate or adjust the brightness and contrast on the menu until the
picture is clear. If the refresh rate of the PC graphic card can not be changed, change the PC graphic
card or consult the manufacturer of the PC graphic card.
NOTES:
1 Use a DVI cable.
2 Avoid keeping a fixed image on the TV's screen for a long period of time. The fixed image may
become permanently imprinted on the screen.
3 The synchronization input form for Horizontal and Vertical frequencies is separate.
External Equipment Connections
12

AUDIO OUT
R L
WOOFER
AUDIO OUT
R L
WOOFER
External Equipment Connections
Connect Loudhailer
1. Face the LCD screen upside down on a
clean blanket or a bracket and pay
attention not to indent the casing. Lay the
two speaker aside of the LCD.
2. Lay a bracket on the speaker
and hind rind, Fix the screws to the speaker
and hind rind.
3. Connect the speaker cable to the
speaker terminal of LCD TV and the
speaker terminal, and insert the
connecting cable intothe terminal slot,
Release the speakerterminal, and ensure
that the white connecting cable is inserted
in the terminalslot marked red and black
connecting cable isinserted in the black
terminal slot, and that anode and cathode
poles are correctly connected.
nnectent
Screw hole
Loudhailer
Annectent
bracket
Connect Woofer
Woofer
1. Take the woofer out, and placeit the hind rind. (See picture)
2. Connect cable tothe woofer terminal and LCDTV terminal,
and insert theconnecting cable into the terminal slot.
13
- The following chart illustrates only, please with yourkind is purchased.

AUDIO OUT
R L
WOOFER
AUDIO OUT
R L
WOOFER
External Equipment Connections
Connect Loudhailer
1. Face the LCD screen upside down on a
clean blanket or a bracket and pay
attention not to indent the casing. Lay the
two speaker aside of the LCD.
2. Lay a bracket on the speaker
and hind rind, Fix the screws to the speaker
and hind rind.
3. Connect the speaker cable to the
speaker terminal of LCD TV and the
speaker terminal, and insert the
connecting cable intothe terminal slot,
Release the speakerterminal, and ensure
that the white connecting cable is inserted
in the terminalslot marked red and black
connecting cable isinserted in the black
terminal slot, and that anode and cathode
poles are correctly connected.
nnectent
Screw hole
Loudhailer
Annectent
bracket
Connect Woofer
Woofer
1. Take the woofer out, and placeit the hind rind. (See picture)
2. Connect cable tothe woofer terminal and LCDTV terminal,
and insert theconnecting cable into the terminal slot.
- The following chart illustrates only, please with yourkind is purchased.
14

Power source
TO USE AC POWER SOURCE
Use theAC polarized line cord provided for
operation onAC. Insert the AC cordplug into
a standard polarizedAC outlet.
NOTES:
Never connect the AC line cord plug to other
than the specifiedvoltage. Use the attached power
cord only.
If the polarized AC cord does not fit into a non-
polarized ACoutlet, do not attempt to fileor cut
the blade. Itis the user`s responsibility to have
an electrician replacethe obsolete outlet.
If you cause a static discharge when touching
the unit andthe unit fails to function, simply
unplug the unitfrom the AC outlet andplug it
back in. The unit should return to normal operation.
Polarized ACCord Plug.
Polarized AC Cord Plug
AC Outlet
Wider Hole
and Blade
External Equipment Connections
15
You can connect a set of headphones to your set if you wish to watch a
TV programme withoutdisturbing the other people in the room.
Connecting Headphones
Note
Prolonged use ofheadphones at ahigh volume
may damage yourhearing.
Youwill not receive sound from thespeakers
when you connectheadphones to the system.
Plug a setof headphones intothe 3.5mm
mini-jack socket onthe rear panelof the set.
ANT IN

Power ON/OFF
Indicator
Remote receiving
window
Switching ON/OFF the TV set
In the manual, the OSD (on screen display) may be different from your TV`s because it
is just an example to help you with the TV operation.
Switching ON/OFF the TV set
1Please press down the power switch to
switch on AC power supply and the power
indicator will light .
2If the indicator is lighting in red, press
POWER button on the remote control again.
3If you want to exchange to standing by
status, please press down POWER button on
the remote controller.
4If you want to fully switch off the power
supply for the TV set, please press down the
power switch button on the TV set.
16
- CH + - VOL + TV/AV MENU POWER
1 Press MENU and VOL+/-button to select
the FUN. Menu.
2 Press CH+/-button to selectLanguage.
3 Select a particular language by pressing
VOL+/- button repeatedly.
You can choose one of two languages.
(Chinese or English)
4 When you are satisfied with your choice,
press MENU button to return to normal
viewing.
When you start using your set for the first time,
you must select the language which will be
used for displayingmenus and indications.
Choose the Menu Language

Choose the input source
Press TV/AV button on remote
controller, the menu appears
on the screen. Then press
CH+/- to select the TV item,
and press VOL+/- to ensure it.
Source
Select input modes
If you hope to enjoy the picture from the external
input source, before to select the source, you need
to connect thedevices, otherwise, when you select
the source, the none or no signal will appears on the
screen.
Before watching TV program, you need to ensure
your TV in TV mode.
TV: the inputsource fromANT IN terminal output.
AV1 : the inputsource fromAV1 terminal output.
AV2 : the inputsource fromAV2 terminal output.
(Note: the AV2 source is not appear for L46A9-AK)
YPbPr/YCbCr: the input source from YPbPr terminal
output.
VGA: the input source from VGA IN terminal
output.
DVI: the input source from DVI IN terminal
output.
USB: the input source from USB socket terminal
output.
17
TV/AV
S-VIDEO
DVD/DTV PC/DVI

OK
Q.VIEW
CH+
CH-
VOL- VOL+
MENU
PSM S
SM
This TV set has three methods to set channels, which are respectively full automatic,
manual search fine tune.
In this section, how to use the remote control to set channel is explained. You can also use
buttons on the TV set to set channel.
Full automatic search mode
Automatic search
1Press the MENU button and
VOL+/- button, till tuning menu
shown on the right display on
the screen.
Note : the tuning menu will be
in normal TV mode. only operated
2Press the CH+/- buttons to
select "Auto Search" item.
3Press the VOL+ button to
ensure automatic search
function work.
After the s arch has finished, ae ll channels now playing
program will be automatically preset in order.
Searching Channel
18
Color Sys. Auto
Sound Sys. D/K
Manual Search
Store Program ---
Fine Tune 49.75MHz
Skip Off
Auto Search
Prog. Switch
B
C
A
VHF-L 188.16
4Press MENU button to stop automatic search function.

OK
Q.VIEW
CH+
CH-
VOL- VOL+
MENU
PSM S
SM
Manual search
Manual search
1Press the CH+/- buttons or the
PROGRAM NUMBER 0-9
button to choose desired
channels regard channel 1 as
example
2Press the MENU button and
VOL+/- button, till the TUN.
menu shown on the right display
on the screen.
3buttons to
select " Manual Search" item.
Press the CH+/-
TV01
AUTO
D/K
4Press the VOL-/+ buttons to
start searching.
19
Color Sys. Auto
Sound Sys. D/K
Manual Search
Store Program ---
Fine Tune 49.75MHz
Skip Off
Auto Search
Prog. Switch
B
C
A
Searching Channel
Fine tune
If the picture and/or sound are poor, try using the FINE
TUNE feature. Do not use this feature unless reception
is poor.
2Press VOL-/+ buttons repeatedly
to carry out fine tune, till the best
picture and sound are obtained,
then loosen the button.
Color Sys. Auto
Sound Sys. D/K
Manual Search
Store Program ---
Fine Tune 49.75MHz
Skip Off
Auto Search
Prog. Switch
B
C
A
When searching successfully for the channel, the Manual search
stopping automatically, at this time, press CH- button to select
Store Program, then press VOL+/- to set the store.
1Repeat step 1-2, then press CH+/- buttons to select
"Fine Tune" item.
VHF-L 188.16
1 2 3
456
7 8 9
0

OK
Q.VIEW
CH+
CH-
VOL- VOL+
MENU
PSM S
SM
123
456
789
0
TV/AV
S-VIDEO
DVD/DTV PC/DVI
Watching TV Program
You can watch TV program in a presetting channel.
Watching TV program
How to select the desired program
1Using "Program number" buttons.
Directly enter the channel number with the numeric keypad
on the remote control.
If to select channel numbers of double-digit or three-figure ,
press continuously the numeric buttons in three second.
2Using the CH+/- buttons.
Press the CH+ button to select a channel number in number
increasing direction.
Press the CH- button to select a channel number in number
decreasing direction.
How to select the desired sound
Press the VOL-/+ buttons on the remote or the front of the
TV set to adjust the volume level. The range is 0~100.
When the volume buttons are pressed the volume level is
displayed automatically on the TV screen.
Volume
To select the TV mode
Before watching TV program, you may ensure your TV in
TV mode.
Press TV/AV button to select TV mode.
20
OK
Q.VIEW
CH+
CH-
VOL- VOL+
MENU
PSM S
SM