LG 47LB1DA 1080p LCD Installation guide

Digital Display
47LB1DA 1080p LCD
Spring 2007
Service
TRAINING MANUAL

Published February 2006 by LG Education & Product Engineering
Customer Service (and Part Sales): 1-800-243-0000
Technical Support (and Part Sales): 1-800-847-7597
USA Website: www.lgusa.com
Customer Service Website: us.lgservice.com
B2B Service Website: aic.lgservice.com
Training Website: www.LGCSAcademy.com
IMPORTANT SAFETY NOTICE
This manual was prepared for use only by properly trained audio-visual service technicians. When servicing this product, under no circumstances
should the original design be modified or altered without permission from LG Electronics. Unauthorized modifications will not only void the
warranty, but may lead to property damage or user injury. All components should be replaced only with types identical to those in the original
circuit and their physical location, wiring, and lead dress must conform to original layout upon completion of repairs. If any fuse (or Fusible
Resistor) in this TV receiver is blown, replace it only with the factory specified fuse type and rating. When replacing a high wattage resistor (Oxide
Metal Film Resistor, over 1W), keep the resistor 10mm away from PCB. Always keep wires away from high voltage or high temperature parts. Do not
attempt to modify this product in any way.
Special components are also used to prevent shock and fire hazard and are required to maintain safe performance. No deviations are allowed
without prior approval by LG Electronics. Service work should be performed only after you are thoroughly familiar with these safety checks and
servicing guidelines. Circuit diagrams may occasionally differ from the actual circuit used. This way, implementation of the latest safety and
performance improvement changes into the set is not delayed until the new service literature is printed.
GENERAL SAFETY GUIDANCE
An lsolation Transformer should always be used during the servicing of a receiver whose chassis is not isolated from the AC power line. Use a
transformer of adequate power rating to protect against personal injury from electrical shocks. It will also protect the receiver and its components
from being damaged by accidental shorts of the circuitry that may be inadvertently introduced during the service operation. Before returning the
receiver to the customer, always perform an AC leakage current check on the exposed metallic parts of the cabinet, such as antennas, terminals,
etc., to be sure the set is safe to operate without damage of electrical shock.
With the instrument AC plug removed from AC source, connect an electrical jumper across the two AC plug prongs. Place the AC switch in the on
position, connect one lead of ohm-meter to the AC plug prongs tied together and touch other ohm-meter lead in turn to each exposed metallic
parts such as antenna terminals, phone jacks, etc. If the exposed metallic part has a return path to the chassis, the measured resistance should be
between 1MΩand 5.2MΩ. When the exposed metal has no return path to the chassis the reading must be infinite. Any other abnormality that
exists must be corrected before the receiver is returned to the customer.
ELECTROSTATICALLY SENSITIVE DEVICES
Some semiconductor (solid-state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically
Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip” compo-
nents. The following techniques should be used to help reduce the incidence of component damage caused by static electricity.
Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on the body
by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be
removed for potential shock reasons prior to applying power to the unit under test. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as an ESD mat, to prevent electrostatic charge buildup or exposure of the assembly. Use
only a grounded-tip soldering iron to solder or unsolder ES devices. Use only an anti-static solder removal device. Some solder removal devices
not classified as “anti-static” can generate electrical charges sufficient to damage ES devices. Do not use freon-propelled chemicals which can
generate electrical charge sufficient to damage ES devices. Do not remove a replacement ES device from its protective package until immediately
before you are ready to install it. Minimize bodily motions when handling unpackaged replacement ES devices (Otherwise, seemingly harmless
motion, such as the brushing together of your clothing or the lifting of your foot from a carpeted floor, can generate static electricity sufficient
to damage an ES device).
REGULATORY INFORMATION
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference when the equipment is operated in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may
cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on,
the user is encouraged to try to correct the interference by one or more of the following measures: Reorient or relocate the receiving antenna;
Increase the separation between the equipment and receiver; Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected; Consult the dealer or an experienced radio/TV technician for help.
The responsible party for this device’s compliance is:
LG Electronics of Alabama, Inc.
201 James Record Road
Huntsville, AL 35824, USA
Digital TV Hotline: [phone]

Directview LCD Training 3Contents
TABLE OF CONTENTS
OVERVIEW ............................................................................................................. 5
INTRODUCTION .................................................................................................... 5
XD ENGINE .......................................................................................................... 5
COMPUTER CONNECTION ........................................................................................ 5
SERIAL NUMBER STRUCTURE .................................................................................. 6
LOCK SYSTEM ...................................................................................................... 6
SET PASSWORD .................................................................................................... 7
MOUNTING INTERFACE .......................................................................................... 7
SERVICE MENU .................................................................................................... 8
SERVICE REMOTE ................................................................................................. 9
THEORY ............................................................................................................... 11
LIQUID CRYSTAL DISPLAY .................................................................................... 11
LIQUID CRYSTAL PANEL ....................................................................................... 12
CIRCUIT DESCRIPTIONS ......................................................................................... 13
POWER SUPPLY .................................................................................................. 13
POWER SUPPLY SPECS ......................................................................................... 14
VIDEO .............................................................................................................. 15
AUDIO ............................................................................................................. 16
I2C FLOWCHART ................................................................................................ 18
TROUBLESHOOTING ............................................................................................... 20
TEST POINTS ..................................................................................................... 20
POWER SUPPLY RESISTANCE READINGS ................................................................... 21
LED INDICATORS ................................................................................................ 22
NO POWER ........................................................................................................ 23
POWER SUPPLY SCHEMATIC .................................................................................. 25
POWER SUPPLY - DEEP SLEEP MODE ....................................................................... 26
POWER SUPPLY - RUN 160VDC & REGULATED 383VDC ............................................... 27
POWER SUPPLY - AC DETECT & RELAY CONTROL ........................................................ 28
POWER SUPPLY - 24VDC & 19VDC SUPPLY .............................................................. 29
POWER SUPPLY - 6VDC & 12VDC SUPPLY ................................................................ 30
DEFECTIVE COMPONENT ....................................................................................... 31
DEFECTIVE HDMI ............................................................................................... 32
DEFECTIVE RF .................................................................................................... 33
DEFECTIVE RF 2 ................................................................................................. 34
DEFECTIVE RF 3 ................................................................................................. 35
DEFECTIVE DIGITAL ............................................................................................ 36
NO AUDIO - COMPOSITE & COMPONENT .................................................................. 37
NO AUDIO - HDMI .............................................................................................. 37
NO AUDIO - RF .................................................................................................. 38
NO AUDIO - DIGITAL ........................................................................................... 38
NO AUDIO - GENERAL .......................................................................................... 39
CABLECARD ....................................................................................................... 40
DISSASEMBLY ....................................................................................................... 43
EXPLODED VIEW ................................................................................................. 43
BACK CABINET REMOVAL ...................................................................................... 44
BOARD DESCRIPTIONS ......................................................................................... 45
FRAME REMOVAL ................................................................................................ 47

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Directview LCD Training 5Overview
OVERVIEW
COMPUTER CONNECTION
A computer can be connected to the RGB (VGA) or HDMI 1 connection
on the TV. The HDMI connection will require a DVI to HDMI adapter if
the PC has a DVI connector.
Set the monitor output resolution and vertical frequency on the PC
before connecting it to the TV. When using RGB (VGA), the TV input
will have to be changed from RGB-DTV to RGB-PC in the main input
menu option. This is not required on the HDMI conection since it is
auto sensing. If the message “OUT OF RANGE” appears on the screen,
adjust the PC output to a format listed in the chart.
47LB1DA
1920x1080p Resolution
NTSC/ATSC/QAM w/CableCARDTM
HDMI with HDCP x2
RGB (VGA) & RS-232
INTRODUCTION
All LCD TV models are module level repair in and out of
warranty. They are covered by a one year parts and labor
warranty. Refer to the last page of the owner’s manual for
more warranty information. For models under 30”, the Sevice
Level is Factory Service Repair. Larger models are Field Service.
Contact the Warranty department for more information.
OVERVIEW
XD ENGINE
XD is LG Electronic’s unique picture improving technology using an advanced digital signal processing
algorithm. When selecting EZ Picture options (Daylight, Normal and Night time), XD is automatically
changed to Auto. When selecting EZ Picture options (User 1 and User 2), you can choose the Auto/
Manual. When selecting Manual, you can adjust XD Contrast, XD color, and XD Noise.
1) Press the MENU button and then use the up or down arrows to select the VIDEO menu.
2) Press the right arrow and then use the up or down arrows to select XD.
3) Press the right arrow and then use the up or down arrows to select Auto or Manual.
Manual:
ˆ XD Contrast: Optimize the contrast automatically
according to the brightness of the reflection.
ˆ XD Color : Adjust the colors of the reflection
automatically to reproduce natural colors as closely
as possible.
ˆ XD Noise: Removes the noise up to the point where
it does not damage the original picture.
Use the use the up or down arrows to select On or Off.
4) Press Exit button to return to TV viewing or press MENU
button to return to the previous menu.
Resolution Vertical
Frequency (Hz)
800x600 60Hz
800x600 72Hz
800x600 75Hz
1024x768 60Hz
1024x768 70Hz
1024x768 75Hz
1280x768 60Hz
1360x768 60Hz
Some PC Resolutions
EZ Picture
Color Temperature
XD
Advanced
Video Reset
Manual
XD Contrast On
XD Color On
XD Noise On

Directview LCD Training 6Overview
OVERVIEW
SERIAL NUMBER STRUCTURE
123 45 67 891011121314
\____/ \__/ \__/ \______________/
àSequential Number (XXXXXXX),
5 to 7 digits (Number or Alphabet)
àSecret Code (VV),2 digits (Alphabet)
àProduction Site (SS), 2 digits (Alphabet)
àLast digit of Year and Month for Production (YMM), 3 digits (Number)
[Example] 403MXXQ05106
1 2 3 4 5 6 7 8 9 10 11 12 13 14 -----14 digit format
4 0 3 MXXQ 0 5 1 0 6 -------12 digit format
\____/ \__/ \__/ \______________/
à05106: Sequential Number
àXQ: 2-Secret Code
àMX: Production Site (produced at LGEMX in Mexico)
à403: Last di
g
it of Year and Month for Production
(
manu. In March 2004
)
LOCK SYSTEM
Enables or disables the blocking scheme you set up
previously.
1) After inputting the password, use the up or down
arrows to choose Lock System.
2) Press the right arrow and then use the up or down
arrows to select On or Off. When you select On, the
Lock System is enable.
3) Press EXIT button to return to TV viewing or press
MENU button to return to the previous menu.
Lock System
Set Password
Block Channel
Movie Rating
TV Rating-Children
TV Rating-General
Input Block
Off
On

Directview LCD Training 7Overview
OVERVIEW
SET PASSWORD
Change the password by inputting a new password twice.
1) After inputting the password, use the up or down
arrows to choose Set password.
2) Press the right arrow and then choose any 4 digits
for your new password.
As soon as the 4 digits are entered, re-enter the
same 4 digits on the Confirm. Then your changed
password has been memorized.
3) Press EXIT to return to TV viewing or press MENU to
return to the previous menu.
NOTE: If you ever forget your password, key in ‘7’, ‘7’, ‘7’, ‘7’ on the remote control.
MOUNTING INTERFACE
The Video Electronics Standards Association (VESA) Flat Display Mounting Interface Standard (FDMI)
outlines mounting interface standards for flat-panel displays. This monitor uses a VESA standard so
most universal wall mounts for Plasmas and large LCDs will work.
3
1
2
3
1
H
A
CB B
E1
D
E2
F
G
Screw Hole
Top View
Side View
Back View
37LZ30 32LC2D 37LC2D 32LP1D 37LP1D 42LP1D 55LP1D 42LB1DR 47LB1DA
A 664.2 682.1 762 570 643.1 725.5 840 1078.5 1173.7
B 220.5 302.6 169 408 275 345 406 287.4 339.7
C 580 200 600 200 600 600 800 600 600
D 269 100 400 100 400 400 400 400 400
EE1:149.5
E2:200
E1:189.2
E2:227.2
E1:112.5
E2:141
E1:117
E2:142.3
E1:146.4
E2:187.4
E1:203.5
E2:274.5
E1:112.4
E2:157.5
E1:136.1
E2:182.6
F 61 60 62 68.8 86 116.1 103.7 71.3 94.1
G 81.5 74 78 135.8 110 103 59.7 85 74.8
HM5M4M6M4M5M5M5M6M6
J131412141414141313
Mounting Hole 580*269 200*100 600*400 200*100 600*400 600*400 800*400 600*400 600*400
VESA NO YES YES YES YES YES YES YES YES
Lock System
Set Password
Block Channel
Movie Rating
TV Rating-Children
TV Rating-General
Input Block
New
Confirm
****
****

Directview LCD Training 8Overview
OVERVIEW
CALIBRATION MENU
Input
Pic. Mode
1. Contrast
2. Brightness
3. Color
4. Tint
5. Sharpness
6. R. Gain
7. G Gain
8. B Gain
9. R Offset
10. G Offset
11. B Offset
POS/SIZE ADJUST
1. H Position
2. V Position
3. H Size
4. V Size
Default Load
Count : 6
90
50
50
0
50
192
97
147
64
64
64
0
0
0
0
DTV
-
123
789
4 65
0FLASHBK
EXPERT MODE
Hold the MENU Key until
ENTER PASSWORD appears on the
screen, Press remote key sequence 8-7-4-1
A custom installer can calibrate the TV to the
viewing environment and the viewer’s
preferences then lock it in so the settings
cannot be altered without the code
SERVICE MENU
Note: Horizontal and Vertical controls only work with the TV, CTV, AV1, and AV2 sources.

Directview LCD Training 9Overview
OVERVIEW
SERVICE REMOTE
NUM KEY FUNCTION
1 POWER To turn the TV on or off
2 POWERON To turn the TV on automatically if the power is supplied to the TV. Use the POWER key to deactivate; It
should be deactivated w hen delivered.
3 MUTE To activate the mute function.
4 P-CHECK To check TV screen image easily.
5 S-CHECK To check TV screen sound easily
6 ARC To select size of the main screen (Normal, Spectacle, Wide or Zoom)
7 CAPTION Switch to closed caption broadcasting
8 TXT To toggle on/off the teletext mode
9 TV/AV To select an external input for the TV screen
10 TURBO SOUND To start turbo sound
11 TURBO PICTURE To start turbo picture
To enter adjustment mode when manufacturing the TV sets.
To adjust the screen voltage (automatic): In-start mute Adjust AV (Enter into W/B adjustment mode).
W/B adjustment (automatic): After adjusting the screen W/B adjustment Exit tw o times
13 ADJ To enter into the adjustment mode. To adjust horizontal line and sub-brightness.
14 MPX To select the multiple sound mode (Mono, Stereo or Foreign language).
15 EXIT To release the adjustment mode.
16 APC(PSM) To easily adjust the screen according to surrounding brightness.
17 ASC(SSM) To easily adjust sound according to the programtype.
18 MULTIMIDIA To check component input.
19 FRONT-AV To check the front AV.
20 CH To move channel up/dow n or to select a function displayed on the screen.
21 VOL To adjust the volume or accurately control a specific function.
22 ENTER To set a specific function or complete setting.
23 PIPCH-(OP1) To move the channel down in the PIPscreen. To use as a red key in the teletext mode.
24 PIPCH+(OP2) To move the channel in the PIPscreen. To use as a green key in the teletext mode.
25 PIPSWAP(OP3) To switch between the main and sub screens. To use as a yellow key in the teletext mode.
26 PIPINPUT(OP4) To select the input status in the PIPscreen. To use as a blue key in the teletext mode.
27 EYE To set a function that will automatically adjust screen status to match. The surrounding brightness so
natural color can be displayed.
28 MENU To select the functions such as video, voice, function or channel.
29 IN-STOP To set the delivery condition status after manufacturing the TV set.
30 STILL To halt the main screen in the normal mode, or the sub screen at the PIPscreen. Used as a hold key in the
teletext mode. Page updating is stopped.
31 TIME Displays the teletext time in the normal mode. Enables to select the sub code in the teletext mode.
32 SIZE Used as the size key in the PIPscreen in the normal mode. Used as the size key in the teletext mode.
33 MULTIPIP Used as the index key in the teletext mode. Top index will be displayed if it is the top text.
34 POSITION To select the position of the PIPscreen in the normal mode. Used as the update key in the teletext mode
(Text will be displayed if the current page is updated.)
35 MODE Used as Mode in the teletext mode.
36 PIP To select the simultaneous screen.
37 TILT To adjust screen tilt.
38 0~9 To manually select the channel.
12 IN-START

- 10 -

Directview LCD Training 11 Theory
THEORY
THEORY
This section covers how an LCD Display works.
LIQUID CRYSTAL DISPLAY
A Liquid Crystal Display is composed of a light source
(backlight), a Liquid Crystal Panel, and a driving circuit. We
start with a light source at the back of the panel composed
of thin fluorescent bulbs (CCFLs - Cold Cathode Flouresent
Lamps). This light passes through filters to help create a
uniform light source. Then the light passes through the Liquid
Crystal Panel which is composed of thousands of pixels that
control the flow of light throught the panel to make images.
Data Driver I
C
Printed Circuit Board
Gate Driver IC
Inverter
Driving
Circuit
Power Supply
for Video Signal
Pixel Array & Wiring
Liquid Crystal
Panel
Polarizer
CF Panel
Liquid Crystal
TFT Panel
Lamp
Prism
Diffuser
Light Guide Backlight Unit
Polarizer
Reflector
Inverter
Polarizer
TFT & Electrode
Color Filters
Top Electrode
Polarizer
Back Light
Liquid Crystals
Liquid Crystal Panel
Frame
Prism
Diffusers
ReflectorLight Guide
An LCD panel from a 15" LCD TV.

Directview LCD Training 12 Theory
THEORY
TFT Element
Pixel Electrode
(Transparent)
Insulator
Semi-conductor
Source Gate Drain
Glass Panel
Data Line
Gate Line
Pixel Electrode
Liquid Crystal
Common Electrode
Color Filter
Polarizer
Polarizer
Tr a n s i s t o r
LIQUID CRYSTAL PANEL
Below (on the left) is a cross section of a liquid crystal panel. The key to an LCD's operation is the
polarizers. The polarizers only allow a certain wavelength of light to pass through. The two polarizers
are mounted at a 90 degree angle with respect to each other, which prevents light from passing
through. The liquid crystals are used to twist the light beam 90 degrees and allow light to pass
through that cell. Color comes from a simple light filter.
Each sub-pixel or cell (a red, green, and blue sub-pixel equals one
pixel) is controlled by a Thin Film Transistor (TFT). This provides
accurate control of each cell and makes for an accurate picture.
Some methods used in the past that didn't involve a switch and
current could leak to surrounding cells resulting in a blurred image.
A TFT is a semiconductor (bottom-right picture), it behaves like a
relay switch.

Directview LCD Training 13 Circuit Descriptions
CIRCUIT DESCRIPTIONS
CIRCUIT DESCRIPTIONS
POWER SUPPLY
BLOCK DIAGRAM
A/C Input
SC100
RMI Filter
LP100, LT101
Bridge
BD100
PFC Stage
Q600, Q601,
Q602, Q603 Main DC/DC
T101
PFC Controler
U600
D113 Run
PC102
Relay ON
PWM
Controller
U106
Main DC/DC
T102
PC104
Stand-by
Rect.
D114, D115
Stand-by DC/
DC
Q500
T100
Output
Rectifier
DC/DC
U202,
Q200,
Q201
PC103
PWM
Controller
U500
3.4 Vo
5VSB to Digital,
Tuner PCB
GND
PWM
Controller
U102
A/C Detect
U510
PC101
Micom
Board
DPM On/Off
A/C Detect
24VDC Detect 19VDC Detect
12VDC Detect
6VDC Detect
RLY On
PC105
Output
Rectifier
D211
D212
Output
Rectifier
D214, D215, D216
D212 19VDC
24VDC
GND
19VDC Detect
24VDC Detect
12VDC
GND
DC/DC
U203,
Q202,
Q203
6VDC
6VDC Detect
12VDC Detect

Directview LCD Training 14 Circuit Descriptions
CIRCUIT DESCRIPTIONS
POWER SUPPLY SPECS
Max Output
Output Voltage STB 5Vo 3.4V 6Vo 12Vo 19Vo 24Vo
Voltage Range 4.95 3.2 5.7 11.4 17 22.8
[V] ~ 5.45 ~ 3.6 ~ 6.3 ~ 12.6 ~ 20 ~ 25.2
Current Range [A] 2 5 5 3 4.4 12
Max Ripple
Output Voltage STB 5Vo STB 3.4Vo 6Vo 12Vo 19Vo 24Vo
Ripple Voltage Range [mVp-p] 200mV 150mV 200mV 360mV 540mV 720mV
Output Regulation
Output Voltage STB 5Vo 3.4Vo 6Vo 12Vo 19Vo 24Vo
Static Regulation Load Max [A] 2 5 5 3 3 10.5
Voltage Spec [V] 4.95 ~ 5.45 3.2 ~ 3.6 5.7 ~ 6.3 11 ~ 13 16 ~ 20 22.8 ~ 25.2
Cross
Regulation
Load Variable[A] 0.8 4 3.5 2.5 1 ~ 2.5 10.5
Voltage Spec [V] 4.95 ~ 5.45 3.2 ~3.6 5.7 ~6.3 11.4 ~ 12.6 16 ~ 20 22.8 ~ 25.2
No Load [A] 0.08 On / Off Off
Voltage Spec [V] 4.95 ~ 5.45 3.2 ~3.6/OFF Off
Deep Sleep Mode
Output Voltage STB 5Vo 3.3Vo 12Vo 19Vo 24Vo 5Vo
Load [A] 0.08 0
Wattage [W] Less than 1W [at 230Vac/50Hz]
SMPS Protect modes
NO Output Voltage
Name
*1) Over Current Protection Over Voltage Protection Short circuit Protection
Range[A] Protection Range[V] Protection
1 STB5Vo Min. 3A Shutdown 8 Shutdown
No Hardware
Failure
2 6Vo Min. 6A Shutdown
3 12Vo Min. 4A Shutdown 14 Shutdown
4 19Vo Min. 5.5A Shutdown 22 Shutdown
5 24Vo Min. 14A Shutdown 26 Shutdown
6 3.4Vo Min. 6A Shutdown 4.5 Shutdown

Directview LCD Training 15 Circuit Descriptions
CIRCUIT DESCRIPTIONS
OSD
RF/Composite
C
o
m
p
o
n
e
n
t
/
H
D
M
I
Digital TV
VIDEO
VIDEO FLOWCHART
CIRCUIT DESCRIPTION
The ATSC/NTSC tuner can receive both terrestrial analog and terrestrial digital signals. But the NTSC
tuner can receive terrestrial analog only. Therefore if you run two displays at The same time, it is
not possible to see two digital channels.
A/V SW (CXA2069) is the IC that takes external input terminal signals and broadcast signals from
the tuners and handles them selectively. Audio signals are sent to MSP4450. Video signals are sent
to HD-II via two paths - uPD64015 on the upper side is used to handle sub displays, while
uPD64015 on the lower side controls the main display.
To the lower side, signals are sent using an expensive 3D-comb filter with Y/C divided. The video
decoder (uPD64015) is a chip that decodes input signals. HD-II is a chip that controls nearly all
video-related functions, including brightness, sharpness, video formatting and scaling. If digital
broadcasting is available, it comes through Transport Stream, which can be controlled from HD-II.
Video SW (CXA2181) is an IC that outputs video signals selectively. The selected one is outputted
through MSP (MSP4450) as a digital signal.

Directview LCD Training 16 Circuit Descriptions
CIRCUIT DESCRIPTIONS
DRIVER IC
The Drive IC sends signals from deinterlacer to the TFT-PANEL.
GATE DRIVER IC(8EA): HORIZONTAL
Sends signals from the data line to the TFT-Panel Gate in series.
Each IC controls 128 lines horizontally.
SOURCE DRIVER IC(5EA): VERTICAL
As the gate of the TFT-Panel is ON, pixel data is being sent from
the source to each pixel. Each IC controls 154 lines vertically.
TCP TYPEDRIVERIC
(Tape Carrier Package)
DRIVERIC
AUDIO
AUDIO FLOWCHART
CIRCUIT DESCRIPTION
The MSP 44x0G family of single-chip Multi-standard Sound Processors covers the sound processing
of all analog TV-Standards worldwide, as well as the NICAM digital sound standards. The full TV
sound processing, starting with analog sound IF signal-in, down to processed analog AF-out, is
performed on a single chip.
These TV sound processing ICs now include versions for processing the multi-channel television
sound (MTS) signal conforming to the standard recommended by the Broadcast Television Systems
Committee (BTSC). The DBX noise reduction, or alternatively, Micronas Noise Reduction (MNR) is
performed alignment free.

Directview LCD Training 17 Circuit Descriptions
CIRCUIT DESCRIPTIONS
The MSP 44x0G has built-in automatic functions: The IC is able to detect the actual sound standard
automatically (Automatic Standard Detection). Furthermore, pilot levels and identification signals
can be evaluated internally with subsequent switching between mono/stereo/bilingual; no I2C
interaction is necessary (Automatic Sound Selection).
The CS5330A / 31A is a complete stereo analog-to digital converter which performs anti-alias
filtering, sampling and analog-to-digital conversion generating 18-bit values for both left and right
inputs in serial form.
The output sample rate can be infinitely adjusted between 2 and 50 kHz. The CS5330A / 31A
operates from a single +5V supply and requires only 150 mW for normal operation The CXA2069Q is
a TV I2C bus-compatible AV switch IC. The video system and the stereo audio system both have 7
inputs and 3 outputs each. 4 of the 7 video system inputs support S2 and S protocols. The desired
inputs can be independently assigned to each output (in the audio system, the left and right
channels are processed as one unit) by I2C bus control. However, the same input is assigned to
both the video and audio system output 3.

Directview LCD Training 18 Circuit Descriptions
CIRCUIT DESCRIPTIONS
I2C FLOWCHART

- 19 -

Directview LCD Training 20 Troubleshooting
TROUBLESHOOTING
TROUBLESHOOTING
TEST POINTS
Connector Pin Stby Run Connector Pin Stby Run Connector Pin Stby Run
1 3.4 V nc 1 0 nc 1 0 nc
2 3.4 V nc 2 0 nc 2 5.9 V nc
3GNDnc 3 0 nc 35.9V nc
4GNDnc 40nc 40 nc
5 6.0 V nc 5 1.4 V nc 5 0.5 V 12.3 V
6 6.0 V nc 6 0 nc 6 0.5 V 12.3 V
7GNDnc 7 0 nc
8 GND nc 8 0 nc Connector Pin Stby Run
9 12.4 V nc 9 0 nc 1 3.4 V nc
10 12.4 V nc 10 0 nc 2 3.4 V nc
11 GND nc 11 0 nc 3 GND nc
12 GND nc 12 0 nc 4 GND nc
Connector Pin Stby Run Connector Pin Stby Run 5 6.0 V nc
1 17.8 18.3 1 17.8 18.3 6 6.0 V nc
2 17.8 18.3 2 17.8 18.3 7 GND nc
3GNDnc 3GNDnc 8GND nc
4 GND nc 4 GND nc 9 12.4 V nc
5 6.0 V nc 5 6.0 V nc 10 12.4 V nc
6 GND nc 6 GND nc 11 GND nc
7 3.4 V nc 7 3.4 V nc 12 GND nc
8 GND nc 8 GND nc Connector Pin Stby Run
9 12.4 V nc 9 12.4 V nc 1 5.2 V nc
10 GND nc 10 GND nc 2 2.2 V nc
Connector Pin Stby Run Connector Pin Stby Run 3 5.2 V nc
1 5.2 V nc 1 5.1 V nc 4 GND nc
2 2.2 V nc 2 0 nc 5 0 3.3 V
3 5.2 V nc 3 4.6 V nc 6 0 nc
4 GND nc 4 0 nc 7 1.6 V 3.3 V
5 0 3.3 V 5 0 nc 8 5.2 V nc
60 nc 60.7Vnc 9GNDnc
7 1.6 V 3.3 V 7 4.9 V nc 10 0.1 V 3.3 V
8 5.2 V nc 8 4.9 V nc 11 6.0 V nc
9 GND nc 9 0 nc 12 GND nc
10 0.1 V 3.3 V 10 8.9 V nc 13 1.9 V nc
11 6.0 V nc Connector Pin Stby Run Connector Pin Stby Run
12 GND nc 1 0 nc 1 0 nc
13 1.9 V nc 2 3.3 V nc 2 5.9 V nc
Connector Pin Stby Run 3 0 nc 3 5.9 V nc
1 0 3.3 V 4 3.3 V nc 4 0 nc
2 1.6 V 3.3 V 5 0 nc 5 0.5 V 12.3 V
3 GND nc 6 0 nc 6 0.5 V 12.3 V
4GNDnc 7 0 nc
5GNDnc 88.9Vnc
6GNDnc
7GNDnc
8 23.9 V nc NOTE: "nc" = No Change fromStandby to Run
9 23.9 V nc
10 23.9 V nc
11 23.9 V nc NOTE: All voltages taken with chassis ground as reference
12 23.9 V nc
SMPS Analog Board De-Interlace Board
Digital Board
P200 P104 P406
P1603
P202 P602
P603 P1605
P1604
P301P201
P203
P204
P205
P206