Sanyo 46XR123D, LED-46XR123D Schematic

FILE NO.

SERVICE MANUAL

LED-LCD TV

with 3D Function

LED-46XR123D

PRODUCT CODE No.

PRODUCT CODE No.
1 682 351 89: PAL-B/G (Australia)

NTSC(AV)

INPUT

3

2

1

6

5

4

8

9

7

RECALL

Q.TOOL

0

EPG

LIST

OK

EXIT

MENU

MUTE

VOL CH

INFO

ZOOM

TTX

FRZ/MIX

STEREO

INDEX

FAV.LIST

SUBTITLE

TV/RADIO

REFERENCE No.:SM0915222

CONTENTS

Safety precautions………………………………………………………………………..…

Alignment instructions …………………………….…….…………………………………

Software upgrade instructions ..................................................................................

Working principle analysis……………………………….………….…………...............

Block diagram…………………………………..………………………………….…………

IC block diagram………………………………………………………………………..……

Wiring diagram …………………………………………………………………………….

Troubleshooting flow chart ………………………………………………………………..……

Schematic diagram…………………………………………………………………………

APPENDIX-A: Assembly list

APPENDIX-B: Exploded View

Assembling the Stand

WALL MOUNTING INSTRUCTIONS

3

5

12

15

17

18

21

22

25

Attention: This service manual is only for service personnel to take reference with. Before

servicing please read the following points carefully.

Safety precautions

1. Instructions

Be sure to switch off the power supply before replacing or welding any components or
inserting/plugging in connection wire. Anti static measures must be taken (throughout the entire
production process!):
a) Do not touch here and there by hand at will;
b) Be sure to use anti static electric iron;
c) It’s necessary for the welder to wear anti static gloves.
Please refer to the part list before replacing components that have special safety requirements.
Do not replace with different components with different specs and type at will.

2. LCD servicing precautions

2.1 Screens are different from one model to another and therefore not interchangeable. Be sure to
use the screen of the original model for replacement.

2.2 The operation voltage of LCD screen is 700-825V. Be sure to take proper measures in
protecting yourself and the machine when testing the system in the course of normal operation or
right after the power is switched off. Please do not touch the circuit or the metal part of the module
that is in operation mode. Relevant operation is possible only one minute after the power is
switched off.

2.3 Do not use any adapter that is not identical with the TV set. Otherwise it will cause fire or
damage to the set.

2.4 Never operate the set or do any installation work in bad environment such as wet bathroom,
laundry, kitchen, or nearby fire source, heating equipment and devices or exposure to sunlight etc.
Otherwise bad effect will result.

2.5 If any foreign substance such as water, liquid, metal slices or other matters happens to fall into
the module, be sure to cut the power off immediately and do not move anything on the module lest
it should cause fire or electric shock due to contact with the high voltage or short circuit.

2.6 Should there be smoke, abnormal smell or sound from the module, please shut the power off
at once. Likewise, if the screen is not working after the power is on or in the course of operation,
the power must be cut off immediately and no more operation is allowed under the same
condition.

2.7 Do not pull out or plug in the connection wire when the module is in operation or just after the
power is off because in this case relatively high voltage still remains in the capacitor of the driving
circuit. Please wait at least one minute before the pulling out or plugging in the connection wire.

2.8 When operating or installing LCD please don’t subject the LCD components to bending,
twisting or extrusion, collision lest mishap should result.

2.9 As most of the circuitry in LCD TV set is composed of CMOS integrated circuits, it’s necessary
to pay attention to anti statics. Before servicing LCD TV make sure to take anti static measure and
ensure full grounding for all the parts that have to be grounded.

2.10 There are lots of connection wires between parts behind the LCD screen. When servicing or
moving the set please take care not to touch or scratch them. Once they are damaged the screen

would be unable to work and no way to get it repaired.
If the connection wires, connections or components fixed by the thermotropic glue need to
disengage when service, please soak the thermotropic glue into the alcohol and then pull them
out in case of dagmage.

2.11 Special care must be taken in transporting or handling it. Exquisite shock vibration may lead
to breakage of screen glass or damage to driving circuit. Therefore it must be packed in a strong
case before the transportation or handling.

2.12 For the storage make sure to put it in a place where the environment can be controlled so as
to prevent the temperature and humidity from exceeding the limits as specified in the manual. For
prolonged storage, it is necessary to house it in an anti-moisture bag and put them altogether in
one place. The ambient conditions are tabulated as follows:

Temperature Operation range 0 ~ +50 oC

Storage range -20 ~ +60 oC

Humidity Operation range 20% ~ 85%

Storage range 10% ~ 90%

2.13 Display of a fixed picture for a long time may cause a permanent after-image on the screen,
as commonly called “ghost shadow”. The degree of the after-image varies with the maker of LCD
screen. This phenomenon doesn’t represent failure. This “ghost shadow” may remain in the
picture for a period of time (several minutes). But when operating it please avoid displaying still
picture in high brightness for a long time.

3. Installation precautions

3.1 The front panel of LCD screen is made of glass. When installing it please make sure to put it in
place.

3.2 For service or installation it’s necessary to use specified screw lest it should damage the
screen.

3.3 Be sure to take anti dust measures. Any foreign substance that happens to fall down between
the screen and the glass will affect the receiving and viewing effect

3.4 When dismantling or mounting the protective partition plate that is used for anti vibration and
insulation please take care to keep it in intactness so as to avoid hidden trouble.

3.5 Be sure to protect the cabinet from damage or scratch during service, dismantling or
mounting.

Adjustment Instruction

1 Safety Instructions

1.1 Power supply must be cut off when replacing or welding any component or inserting / pulling out

connective lines;

1.2 Anti-electrostatic measures must be carried out during the whole producing processes!

a) Do not touch IC by hands at will;

b) Use anti-electrostatic iron;

c) Welder must wear anti-electrostatic glove;

1.3 Replacing any component with special safety requirement must refer to component list without

changing its specification and model at will.

2 Adjustment Equipments

Multimeter or osciillograph

VG-849

CA-21

USB

DVD (included HDMI 1.4) or equipments with the same functions

3 Adjustment Processes

3.1 Power voltage test

According to the wiring diagram specified by “Product Specification”, connect power board
assembly, data processing assembly, IR/Key board assembly, backlight board assembly correctly,
supply with power, press button

to power on the TV set.

Test voltage of socket X601 each pin on the main board. Voltage value and range are listed as

Table 1:

Table 1 Voltage of X601 each pin

X601 Pin1,2 3,4 5,6 7,8 9 10 11 12 13

Voltage 24V±5% 0

Function AMP_PWR GND

12

V±5%

+5V

STB

0 ≤5.2V

GND PWR_SW

5

V±5%5 V±5%

Main

5V

+5V

STB

≤5.2 V ≤5.2 V

BL_PWM BL_ON

3.2 Adjustment flow as Fig. 1:

Check if EDID、HDCP KEY、FLASH has been written?

General assembly and combined adjustment

White balance adjustment

Input central signal, check TV function (omitted

channel, analog parameters control, etc. ), check

earphone, speakers output.

Check AV input, output and relevant functions.

Input Component signal, check YPbPr functions.

Input D-SUB signal, check display and all functions

(such as analog parameter), H/V center, etc..

Input HDMI signal, check display and all functions

(such as analog parameter), H/V center, etc..

Fig. 1 Adjustment flow chart

Check accessory and packing

Default settings before ex-factory

Check other functions (Radio、

LCN、HDMI ARC/CEC、OAD, etc.）

Check USB multimedia port and

4 Adjustment Instruction

4.1 The unit adjustment

4.1.1 According to the wiring diagram specified by “Product Specification”, connect

power/backlight board assembly, data processing assembly, IR/Key board assembly correctly, supply

with power, turn on the TV set. Check display.

4.1.2 Factory menu instruction

a) Press key “INPUT”, then press digital keys “2、5、8、0” in turn to enter into primary factory

menu;

b) Press keys “▲” and “▼” to move cursor to each page of primary factory menu, then press

key “OK” to enter into submenu page;

c) Press keys “▲” and “▼” to move cursor upward or downward within any one page;

d) Press keys “◄” and “►” to do adjustment when move cursor to one item;

e) Press key “MENU” to exit submenu page to the superior factory menu;

f) Press key “EXIT” to exit factory menu in any case;

g) Press key “OK” to enter the inferior factory submenu;

h) Factory menu item: Aging Mode to be used for aging the TV set; red, green blue and

white full screen picture displays in turn; default setting is OFF;

i) Factory menu item: ADC ADJUST to be used for ADC calibration for VGA and

Component;

j) Factory menu item: Fac. Channel Preset to be used for factory channel presetting; central

signal digital frequency value for Australia program is set as CH28(529.5 MHz) and

CH33(564.5 MHz); original digital program presetting could not change if central signal

setting has any modification, so please search for digital program manually by perform item

DTV of menu Channel;

k) Factory menu item: Color Temp. to be used for white balance adjustment;

l) Factory menu item: Store Setting Init.

m) Factory menu item: USB SW Update to be used for software updating from USB port;

when U disk containing updating software is inserted into USB port, choose the item to

perform updating process;

n) Factory menu item: Other Settings include settings of EEPROM Init, MEMC Update,

Power mode, MST DEBUG, ISP MODE, Backlight, SSC, NONLINEAR, Video Quality, Audio

Quality, Light Sensor, Overscan, etc.; no need any adjustment normally.

o) Factory menu item: Shipment to be used for initializing user data; Success flag will display

after initialization, then press KEY POWER only to power off the TV set.

p) Please perform EEPROM Init before adjustment for the first time if software has been

upgraded or data have been kept in EEPROM.

4.1.3 ADC calibration for D-SUB channel

a) Switch to D-SUB channel;

b) Press key “INPUT”, then press digital keys “2、5、8、0” in turn to enter into primary factory

menu;

c) Move cursor to item “ADC ADJUST” and press key “OK” to enter into the inferior submenu;

d) Input D-SUB signal (VG-849 Timing:856 (1024×768/60 Hz), Pattern:914 Chess Pattern);

move cursor to item “MODE”, press keys “▲” and “▼” to choose item “RGB”, then move

cursor to item “AUTO ADC” and press key “OK” to perform auto adjustment until prompt

“success” displays;

4.1.4 ADC calibration for Component channel

a) Switch to Component channel;

b) Press key “INPUT”, then press digital keys “2、5、8、0” in turn to enter into primary factory

menu;

c) Move cursor to item “ADC ADJUST” and press key “OK” to enter into the inferior submenu;

d) Input Component signal (VG-849 Timing:972(1080i), Pattern:918 100% color bar); move

cursor to item “MODE”, press keys “▲” and “▼” to choose item “YPbPr”, then move cursor to

item “AUTO ADC” and press key “OK” to perform auto adjustment until prompt “success”

displays;

4.2 White balance adjustment

Unless specified by customer, default settings of COOL color temperature is 12000K and
chromatic coordinates is (272、278); referenced settings of Normal color temperature is 9300K and
chromatic coordinates is (285、293); referenced settings of Warm color temperature is 6500K and
chromatic coordinates is (313、329);

Default setting is Normal.

4.3 Adjustment procedures

The TV set should be working above 30 minutes to be in a stabler state before adjustment. Use

CA-210 BBY channel to adjust white balance;

a) Switch to HDMI channel;

b) Press key “INPUT”, then press digital keys “2、5、8、0” in turn to enter into primary factory

menu;

c) Move cursor to item “W/B ADJUST” and press key “OK” to enter into the inferior submenu;

d) Input HDMI signal (VG-849 Timing:856(1024×768/60 Hz)，Pattern:921 16 step Gray);

move cursor to item “MODE”, press keys “▲

” and “▼” to choose item “HDMI”, then move

cursor to item “TEMPERTURE” and press keys “▲” and “▼” to choose “COOL”;

th

e) Fix “G GAIN”, adjust “R GAIN, B GAIN” to set 14

f) Fix “G OFFSET”, adjust “R OFFSET、B OFFSET” to set 4

chromatic coordinates as (272、278);

th

chromatic coordinates as

(272、278);

g) To make sure chromatic coordinates of bright scale are (X=272±10， Y=278±10) and

chromatic coordinates of dark scale are (X=272±10，Y=278±10) during adjusting;

h) Move cursor to item “COPY ALL” to copy white balance data to other channels except DTV

channel;

i) Check if chromatic coordinates of NORMAL and WARM meet the requirements (permitted

error of NORMAL bright scale: x±10，y±10, permitted error of NORMAL dark scale: x±10，
y±10; permitted error of WARM bright scale and dark scale: x±10，y±10); if not, adjust

“R_GAIN /B_GAIN/R_OFF/B_OFF” to be up to the requirements and then save the data;

j) Perform “Copy All” for Normal/Warm adjustments except DTV channel;

k) Check if chromatic coordinates of other channels meet the requirements, if not, do

adjustment for nonstandard channel alone with the same procedures from b) to j) as HDMI

channel’s and then save the data;

l) Switch to HDMI channel, change to 16-grey-scale program from central signal source,

adjust white balance with the same procedures from e) to g) as HDMI channel’s; but pay

attention not to perform “COPY ALL”!

m) Inspect all channels after completing adjustment to check if display is normal;

n) Refer to the following rule for adjustment:

B Gain/Offset: adjust B Gain/Offset downward, coordinates of X and Y will increase, adjust B

Gain/Offset upward, coordinates of X and Y will decrease;

R Gain/Offset: adjust R Gain/Offset will affect X value, but affect Lv value slightly, adjust R

Gain/Offset upward, coordinates of X will increase, adjust R Gain/Offset

downward, coordinates of X will decrease;

G Gain/Offset: adjust G Gain/Offset will affect Y value, and affect Lv value greatly, adjust G

Gain/Offset upward, coordinates of Y will increase, adjust G Gain/Offset

downward, coordinates of Y will decrease;

Note: Sanyo customer requires that default color temperature is Normal, adjust white
balance of color temperature Normal and Cool in Dynamic picture mode; for other
customers, please adjust white balance of color temperature Cool in Dynamic picture mode.

5 Function check

5.1 TV functions

Input central signal to RF port, enter into menu Channel first, then search for programs
automatically and check if there is any omitted program; check the speakers output and the picture
display;

5.2 AV port

Input AV signal with formats listed as Table 1 separately, check picture, sound and other

functions;

Table 1 AV video signal formats

No.

1 525 15.734/15.75 59.94/60 NTSC, NTSC4.43,PAL60,PAL-M

2 625 15.625 50 PAL, PAL-N, SECAM

Lines per

frame

H.- Freq.（kHz） V.- Freq.（Hz）

Note

5.3 Component port

Input Component signal from VG-849 with formats listed as Table 2 separately, check picture and

sound in the case of power-on, switching channel, changing mode, etc.;

Table 2 Component signal formats

No. Definition

1 720×480 15.734/15.75 59.94/60 13.5/13.514 480i (NTSC)

2 720×576 15.625 50 13.5 576i (PAL)

3 720×480 31.469/31.5 59.94/60 27/27.027 480p (NTSC PROG)

4 720×576 31.25 50 27 576p (PAL PROG)

5 1280×720 37.5 50 74.25 720p (50p)

6 1280×720 44.955/45 59.94/60 74.176/74.25 720p (59.94p/60p)

7 1920×1080 28.125 50 74.25 1080i (50i)

8 1920×1080 33.75 59.94/60 74.176/74.25 1080i (59.94p/60p)

9 1920×1080 26.973 23.976 74.176 1080p (23.97p)

10 1920×1080 27 24 74.25 1080p (24p)

11 1920×1080 28.125 25 74.25 1080p (25p)

12 1920×1080 33.716 29.97 74.176 1080p (29.97p)

13 1920×1080 33.75 30 74.25 1080p (30p)

14 1920×1080 56.25 50 148.5 1080p (50p)

15 1920×1080 67.432/67.5 59.94/60 148.35/148.5 1080p (59.94p/60p)

H.- Freq.

(kHz)

V.- Freq.

(Hz)

Dot pulse Freq.

(MHz)

Note

5.4 D-SUB port

Input D-SUB signal from VG-849 with formats listed as Table 3 separately, check picture and

sound; if H./V. of picture displays abnormally, enter into main menu Picture->Screen->Auto Adjust to

perform auto calibration.

Table 3 D-SUB signal formats

No. Definition

1 640×480 31.469 59.94 25.175 IBM

2 720×400 31.469 70.086 28.322 IBM

3 640×480 37.861 72.809 31.5 VESA

4 640×480 37.5 75 31.5 VESA

5 800×600 35.156 56.25 36 VESA

6 800×600 37.879 60.317 40 VESA

7 800×600 48.077 72.188 50 VESA

8 800×600 46.875 75 49.5 VESA

9 1024×768 48.363 60.004 65 VESA

10 1024×768 56.476 70.069 75 VESA

11 1024×768 60.023 75.029 78.75 VESA

12 1152×864 67.5 75 108 VESA

13 1280×960 60 60 108 VESA

14 1280×1024 63.98 60.02 108 VESA

15 1280×1024 80 75 135 SXGA

16 1360×768 47.7 60 85.5 WXGA

17 1440×900 55.9 60 106.5

18 1680×1050 65.3 60 146.25

19 1920×1080 67.5 60 148.5

H.- Freq.

(kHz)

V.- Freq.

(Hz)

Dot pulse Freq.

(MHz)

Note

WXGA+ ( Panel

National only)

WSXGA+ ( Panel

National only)

5.5 HDMI port

HDMI port supports all signal formats supported by Component port (Table 2) and D-SUB port

(Table 3), furthermore, it can also support signal with formats listed as Table 4 and Table 5 (video and

audio combination). Check picture and sound in the case of power-on, switching channel, changing

mode, etc.;

Table 4 Digital HDMI signal formats

No

.

1 720(1440)×480 15.734/15.75 59.94/60 27/27.027

2 720(1440)×576 15.625 50 27 720(1440)×576i@50 Hz,4:3/16:9

Definition

H.- Freq.

(kHz)

V.- Freq.

(Hz)

Dot pulse

Freq.

(MHz)

Note

720(1440)×480i@59.94/60 Hz,

4:3/16:9

Table 5 Video & audio signal formats of digital HDMI

No. Item Unit Parameter Note

1 Video

Audio sample

2

freqence

Audio data

3

width

kHz

Bit

Deep color：RGB 4:4:4（24 bit/pixel，30 bit/pixel，36 bit/pixel）、

YUV 4:4:4 （24 bit/pixel，30 bit/pixel，36 bit/pixel）、

对于1080p，deep color只支持到30 bit/pixel。

YUV 4:2:2(16 bit)、YUV 4:2:2(20 bit)、YUV 4:2:2(24 bit)

32、44.1、48

16、20、24

5.6 USB port

5.6.1 PVR function

Insert a formatted U disk in which recorded programs have been saved; press key “Record

List” to choose and play one program, check picture, sound and other functions;

5.6.2 Media playing function

Insert a U disk kept files of picture, sound and video, check picture, sound and other

functions;

Supported media formats as below:
Photo：JPEG，BMP，PNG
Video：H.264 ，MPEG-1，MPEG-2，VC-1，FLV
Audio：WMA，MP3，M4A (AAC)

5.7 Music port （depending on different models whether contain the port or not）

Input audio signal to back VGA MUSIC/AUDIO In port from audio output equipment, check audio

output is normal or not.

5.8 Other functions check

a) Check timing on/off, sleeping time off, picture/sound mode, OSD, stereo, digital audio port,

etc,;

b) Check pure digital audio programs (RADIO) ;

c) Check logical channel number (LCN);

d) Check HDMI ARC;

e) Check HDMI CEC;

f) Check OAD for special customer;

6 User Menu Setting before Ex-factory

Enter into Factory Menu and choose “Shipment” to perform presetting before ex-factory;

Main procedures are described as follow:

a) Clear out all programs;

b) Clear out information of VCHIP，parent control, etc.;

c) Default user analog parameter setting;

d) Recover default password;

e) Set Menu Language as English；

f) Set Power mode as Standby。

Software Upgrading Instruction

Software Upgrading Instruction as Table 6

Table 6 Software Upgrading Instruction

Software

Location Part No. Part model

function

N103 5272532006 EN25Q32A-100HIP FLASH Yes

N105 5272404005 CAT24C04WI-GT3 HDCP KEY Yes

NB03 5272402003 CAT24C02WI VGA EDID Yes

SMT before

Upgrading method

upgrading

Upgrade with ALL100, etc.,

need write protection, refer to

Note1;

Upgrade with ALL100, etc.

Note 1 Write protection setting method: enter into ALL-100 upgrading interface “AUTO”, tick off

“Config”, press “config Setting”, set option “Protect” as “All Protect” and “SRWD” as “Enable”,

then press “OK” to complete write protection setting;

Please make sure option “Config” is ticked off during software upgrading and reset write

protection after ALL-100 upgrading software is opened each time;

Note 2 Upgrading method with ISP upgrading instrument:

1） Main board upgrading: connect 4-core line of ISP to Debug port (X107) on main board;

The Unit upgrading: connect both VGA ports of ISP and main board, enter into factory menu and
set “ISP Mode” as “ON”;

2） Use Mstar upgrading instrument (V4.4.2.0 or higher version), enter into menu “Device”, tick off

“WP Pin pull to high during ISP” to make sure Flash hardware write protection is removed and

erasing process is normal; please refer to Fig.2;

Fig. 2 Write protection setting

3） Press menu “Connect”, dialog box “Device Type is MX25L64” (device type depending on parts

used on board actually) will display to show successful connection; please refer to Fig. 3;

Fig. 3 Device MX25L64 successful connection

If connection is failed, press the first menu “Device” and choose “MX25L64” manually, then press

“Connect”;

4） Press “Read”, choose upgrading file, such as “MERGE.bin”; please refer to Fig. 4;

Fig. 4 Choosing upgrading file

5） Press “Auto”, tick off “All chip”, “program” and other necessary options; please refer to Fig. 5;

Fig. 5 Options

6） Press “Run” shown as Fig. 4 to perform upgrading in two steps, “Erase” and “Program”;

Normal upgrading process:

The first step “Erasing…， Flash Status: 03” will last for some time, or erasing is failed if the step

passes over immediately; please confirm procedure 2) to perform upgrading again;

The second step is “Programming…，Flash Status:00”;

Then prompt “Pass” displays;

7） Prompt “Pass” will display by button “Run” when upgrading succeeds; please refer to Fig. 6;

Fig. 6 Prompt “Pass” displayed by “Run” when upgrading succeeds

8） Need not exit ISP upgrading interface if there are other TV sets to be upgraded , only procedures

3) and 6) need repeat;

Note 3 Upgrading with USB:

1） Make sure U disk is formatted as FAT32;

2） Copy software file named as “Merge. bin” to U disk;

3） Turn on the TV set, then insert U disk in USB port of the unit;

a) First press key “INPUT”, then press keys “2、5、8、0” in turn to enter into primary factory

menu;

b) Choose “USB SW Update” to begin upgrading;

4） Upgrading processes:

A、Read data from U disk while data indicator light of U disk is twinkling at the same time;

B、Upgrading flash, then the unit will be in “standby” mode;

5） Cut off the power supply and then restart the TV set, enter into factory menu to verify version and

time parameter, then perform “EEPROM Init” to complete the whole upgrading processes.

Note: The USB upgrading method can not be sure to be suitable for all kinds of U disk, so try another U

disk if necessary.

Working Principle of the Unit

1、 ATV PAL signal flow

Receive RF PAL analog signal and sent it to XC5200C (D/A silicon Tuner controlled by main chip

2

MSD309PX through I
MSD309PX analog demodulation to be demodulated to get analog CVBS video signal and SIF sound

signal.

CVBS video signal is processed by back-end video decoder, anti-interlacing part, video processor

and zoom controller, then a pair of LVDS signals are outputted to chip MST6M30 to be processed by
modules of 120HZ, MEMC and 3D effect, then two pairs of LVDS signals are outputted to drive display
panel.

SIF sound signal is processed by back-end demodulator to get analog sound signal, then processed

by pre-amplifier, acoustic effect processor and volume controller to get two parts of signals: the analog
part of signal is sent to earphone amplifier MAX9820 to be amplified and then outputted to earphone jack;
the digital part of signal I2S is sent to digital audio power amplifier TAS5711 to be processed by D/A
converter and power amplifier, then outputted to drive speakers.

2、 DVB-T signal flow

Receive RF DVB-T digital signal and sent it to XC5200C (D/A silicon Tuner controlled by main chip
MSD309PX through I
send out to main chip MSD309PX digital demodulation to be demodulated, then standard parallel
transmission flow is outputted to back-end demultiplexer and decoder to be processed.

Video channel: demultiplexing digital video signal is processed by MSD309PX decoder and video
processor, then a pair of LVDS signals are outputted to chip MST6M30 to be processed by modules of
120HZ, MEMC and 3D effect, then two pairs of LVDS signals are outputted to drive display panel.

Audio channel: demultiplexing digital audio signal is processed by MSD309PX decoder and audio
processor, then double-sound-track analog audio signal (stereo) is outputted to MSD309PX to be
processed by preamplifier, acoustic effect processor and volume controller to get two parts of signals: the
analog part of signal is sent to earphone amplifier MAX9820 to be amplified and then outputted to
earphone jack; the digital part of signal I2S is sent to digital audio power amplifier TAS5711 to be
processed by D/A converter and power amplifier, then outputted to drive speakers.

3、 AV input signal flow

AV video signal is inputted to main chip MSD309PX to be processed by video decoder,
anti-interlacing part, video processor and zoom controller, then a pair of LVDS signals are outputted to
chip MST6M30 to be processed by modules of 120HZ, MEMC and 3D effect, then two pairs of LVDS
signals are outputted to drive display panel.

AV audio signal is processed by voltage divider, resistance matcher and AC coupler, then sent to
main chip MSD309PX to be processed by acoustic effect processor and volume controller to get two parts
of signals: the analog part of signal is sent to earphone power amplifier MAX9820 to be amplified and
then outputted to earphone jack; the digital part of signal I2S is sent to digital audio power amplifier
TAS5711 to be processed by D/A converter and power amplifier, then outputted to drive speakers.

C bus) to be demodulated, then differential IF signal is send out to main chip

2

C bus) to be processed by down-frequency-conversion, then differential IF signal is

4、 D-SUB/YPbPr input signal flow

D-SUB、YPbPr video signal is inputted to main chip MSD309PX to be processed by A/D convertor,
video decoder, anti-interlacing part, video processor and zoom controller, then a pair of LVDS signals are
outputted to chip MST6M30 to be processed by modules of 120HZ, MEMC and 3D effect, then two pairs
of LVDS signals are outputted to drive display panel.

D-SUB、YPbP audio signal is processed by voltage divider, resistance matcher and AC coupler, then
sent to main chip MSD309PX to be processed by acoustic effect processor and volume controller to get
two parts of signals: the analog part of signal is sent to earphone power amplifier MAX9820 to be
amplified and then outputted to earphone jack; the digital part of signal I2S is sent to digital audio power
amplifier TAS5711 to be processed by D/A convertor and power amplifier, then outputted to drive
speakers.

5、 HDMI input signal flow

HDMI video signal is inputted to main chip MSD309PX to be processed by video decoder, video
processor and zoom controller, then a pair of LVDS signals are outputted to chip MST6M30 to be
processed by modules of 120HZ, MEMC and 3D effect, then two pairs of LVDS signals are outputted to
drive display panel.

HDMI audio signal is sent to main chip MSD309PX to be processed by audio decoder, pre-amplifier,
acoustic effect processor and volume controller to get two parts of signals: the analog part of signal is sent
to earphone power amplifier MAX9820 to be amplified and then outputted to earphone jack; the digital
part of signal I2S is sent to digital audio power amplifier TAS5711 to be processed by D/A convertor and
power amplifier, then outputted to drive speakers.

Block Diagram

Speakers

IC Block Diagram

1、 TUNER IC XC5200C

The Single-Chip Multi-Standard Tuner XC5200C supports all analog TV

formats transmitted worldwide in the 42-1000 MHz band on either cable or
terrestrial broadcast channels. It implements on-chip tuning, and channel
filtering without external (SAW) filters and has no manually tunable parts.

The broadband tuner converts the selected channel into an Intermediate
Frequency (IF), which is then sampled by an internal high-resolution
analog-to-digital converter (A/D) for further processing.

The IF signals are filtered using a standard-dependent high-rejection
channel filter and converted to a user programmable output frequency. At the
output of the D/A converter, the TV signal is low-pass filtered using a
high-performance smoothing filter and input to a variable gain amplifier. The IF
output amplifier gain can be controlled via an external analog signal on Vagc.

The XC5200C architecture is summarized in Figure 1. XC5200C Block
Diagram.

2、 AMP IC TAS5711

The TAS5711 is a 20-W, efficient, digital audio power amplifier for driving

stereo bridge-tied
speakers. One serial data input allows processing of up to two discrete audio
channels and seamless integration to most digital audio processors and MPEG
decoders. The device accepts a wide range of input data and data rates. A fully
programmable data path routes these channels to the internal speaker drivers.

The TAS5711 is an I2S slave-only device receiving all clocks from external

sources. The TAS5711
operates with a PWM carrier between 384-kHz switching rate and 352-KHz
switching rate depending on the input sample rate. Over sampling combined
with a fourth-order noise shaper provides a flat noise floor and excellent
dynamic range from 20 Hz to 20 kHz.

3、 AUDIO IC MAX9820

The MAX9820 Windows Vista®-compliant stereo headphone amplifier is

designed for portable
Equipment where board space is at a premium. It features Maxim’s
DirectDrive® architecture to produce a ground-referenced output from a single
supply, eliminating the large output-coupling capacitors required by
conventional single-supply headphone amplifiers.

The MAX9820 features an undervoltage lockout that prevents over

discharging of the battery
During brownout conditions, click-and-pop suppression that eliminates audible
transients on startup, a low-power shutdown mode, and thermal-overload and
short-circuit protection. Additionally, the MAX9820 suppresses RF radiation
received by input and supply traces acting as

antennas and prevents the amplifier from demodulating the coupled noise.

Wiring Diagram

Panel

Power board

Backlight Board

Key Board

IIR Board

Speakers

Power Switch

Power

Debug

Key IR

Main board

Speaker

Troubleshooting Block Diagram

1．Panel doesn’t light up.

Supply with power,

Yes

check if red indicator
lights up in STANDBY
state?

Red
No

Check if 5V is supplied

Blue

to X601-PIN3 ?

No

Check STANDBY
circuits on power
board.

Yes

No

No

Yes

Check power
control circuits on
main board.

Press key POWER
on remote control or
the unit, check
indicator.

Check if level of
X601-PIN1 on main
board is high?

Check backlight
board.

Check power
control circuits on
main board.

Check if level of
X601-PIN5 on main
board is high?

Check power
board.

2．

No picture, but backlight is normal:

Can control the TV set

Yes Yes

by keys on remote
control or the unit?

No
No
Yes TV

有
No

No

Replace the main
board

Enter into factory menu to initialize
EEPROM, then cut off main power
and then turn on the TV set again,
check if there is picture?

Readjust the
main board.

Press key MENU,
can OSD display
normally?

Do no channel
have picture at
all?

Yes

3．No sound, but picture is normal:

Yes No

No
Yes

No

Yes No Yes

No sound

Check if level of
N607-PIN19&25
are all high?

Check if level of
V606-b is low?

Replace
V606

Check if there is
signal inputted to
N607-PIN15&20&21
&22 ?

Check power voltage
of N607.

Check IIC signal of
N607- PIN23&24.

Check IIS
(signal input
circuits) on main
board.

Check +24V on
power board.

Check Reset &
Mute circuits of
power amplifier.

ABCDEFGH

C522
220n

E

-

4

+

1

D501

AC

23

1

V_PFC

H

NC

C567

C568

R501

1M

2

L501

E

C519

H

C518

4.7u
C526

1000p

C527

R522

18K

C529

C521

22u

16V

C523

1000p

C524

2.2u

C525
100p

120

R523

47K

R524

220

R574

47u

63V

680

R525

120

R527

R526

680

1

2

3

4

5

6

7

8

R577
470K

Vsen

VC1

FB

GND

SS

OC

RC

RV

N503

SSC9512

1KV

10p

C532

V_9500

NC16

VGH

NC12

VGL

PGND

VC2

R576

VS

VB

470K

16

15

14

13

12

11

10

R578
470K

R534

D510

9

C533

220n

H

10

ES1J

R575
470K

R536

22

C535
220n

D512

MMSZ5245B

22

R538

R539

33

CD4148WP

D513

R540

33

CD4148WP

D514

10K

R545

10K

R546

G

E

G

V504

D

S

D

S

V503

V_PFC

D523

C558

8

E

11

35V

820u

C555

820u

35V

6 10

C550
100n

D524

D520

SR506

D521

SR506

33K

25V

R561

35V

C552

1000u

25V

C556

820u

24VCF

C557

1000u

35V

L507

C559

820u

10K

R568

12VSC

470p

C539

2KV

250VAC

H

0.22u

1KV

330p
C543

C540

9

15

3

12

14

13

16

T503

R557

2.2K

R556

2.2K

35V

R569

25V

10K

820u

220u

C561

C562

10K

R570

10K

R572

100n

C564

10K

R573

BON

PWM

24VCF

TJC3S-12AW

X502

12

11

10

9

8

7

6

5

4

3

2

1

C549

2.2K

R559

N507

C501C502

V_PFC

RT501

FU501

C504

L502

E

C503

NC

RT502

t

t

1

2

X501

R502

1M

1M

R503

R505

470K

R504

1M

C511

100n

N502

7D78

D8

S/OCP2FM/SS3GND4FB/CC/OLP

STR-A6059H

1

1.8

R521

H

5

VCC

4.7n

C528

C530

100n

D508

HZ16-1*

63V

47u

C531

D525

HZ30-2

R531

R532

FR105P

D509

H

82K

1n

1KV

C534

MM

82K

D511

1N4007

R533

33

T502

1

2

3

5

D515

10

SR506

C536

C538

4.7n

R550

10

25V

1000u

4.7n

8

6

4

R547

470

1.6K

N506

LM431A

C

Z

R548

5.1K

A

R552

1.5K

R553

N504

R542

1K

C537
220n

3

4

C541

25V

NC

H

C544

1000u

C566

2.2n
C546

C547

NC

L506

24VCF

D516

MMSZ5254B

N508

12VSC

D518

Z

A

C

LM431A

25V

C548

220u

C551

R558

MMSZ5245B

1500p

100n

47K

R560

2.7K

1

2

3

4

27K

R563

S2

G2

S1

G1

27K

R564

N509

AO4803A

C553
470n

D2_8

D2_7

D1_6

D1_5

BON

PWM

13

12

11

10

9

8

7

6

5

25V

C563

220u

C565

100n

4

3

2

1

8

7

6

5

TJC3S-13AW

X504

R555

1K

C545

100n

BAV70

D517

R562

V507

MMBT3904

10K

47K

R565

R567

10K

510

R543

R530

4.7K

R535

5

V_9500

R528

10

2SA966-0

V502

2.2K

R544

510

V505

N505

H

MMBT3904

47K

R549

R551

4.7K

V506

HXL1225

R554

C542

100n

47K

APPENDIX-A: Main Assembly 9246KI7710 LED-46XR123D

NAME NO. MAIN COMPONENT AND IT'S NO.

N101 MSD309PX-LF-SV 5270309003
N107 NT5TU32M16DG_AC 5273216001

N108 NT5TU32M16DG_AC 5273216001

Data processing
board

IR board
3D IE board
Key board

Power/Inverter
board

Remote control
Panel

XI6KI0230110

XI635KI01606

XI635KI01608

XI635KI01605

XI6KI02320A0

XI6011300401 RC-1304-0A
XI5203468510 V460H1-LS2 C7

N312 SGM4918 5274918001
N607 TAS5711 5275711001

N205 XC5200C 5275200002
N803 MST6M30RS 5270630002

N804 NT5TU32M16DG-BE 5273216002

APPENDIX-B: Exploded view (LED-46XR123D)

PART LIST OF EXPLODED VIEW

REF.No. DESCRIPION

1 Front cabinet assembly
2
3
4 Display panel
5
6 Back cover assembly
7
8
9
10 Pedestal connecter
11 Interface baffle (down)
12 Interface baffle (side)
13
14
15
16

Key board assembly
Main board assembly

Power board assembly

Standing pole assembly
Pedestal assembly
Panel pressing block

3D IE assembly
Power cord bracket
Sound box assembly
IR assembly

Note: Design and specification are subject to change without notice.

PART LIST

LED-46XR123D ver.1.0

REF.No. PARTS No. DESCRIPION Q'TY REMARK

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20

XI6646770040
XI635KI01605
XI6KI0230110
XI5203468510
XI6KI02320A0
XI674677H040
XI615611500A
XI6151244000
XI5810082000
XI58A0096600
XI5810M78610
XI5810F79610
XI635KI01608
XI58B0A45610
XI6170859000
XI635KI01606
XI6011300401
XI5944040340
XI60Z0000777
XI60Z0000778

Front cabinet assembly 1
Key board assembly
Main board assembly

1
1

Display panel 1 V460H1-LS2 C7
Power board assembly

1

Back cover assembly 1
Standing pole assembly
Pedestal assembly
Panel pressing block

1
1
5

Pedestal connecter 1
Interface baffle (down) 1
Interface baffle (side) 1
3D IE assembly
Power cord bracket
Sound box assembly
IR assembly
Remote control
User manual
Backlight board
Logical board

1
1
1
1
1
1
1
1

Only the parts in above list are used for repairing.
Other parts except the above parts can't be supplied.

Appendix: Installing the Stand

If the stand is provided, please read these instructions thoroughly before attempting this installation.

You must install your TV into the stand in order for it to stand upright on a cabinet or other flat surface. If you intend to mount your TV
on a wall or other vertical surface, you must remove the stand column.

Cautions:

Make sure that you handle your TV very carefully when attempting assembly or removal of the stand. If you are not sure of
your ability to do this, or of your ability to use the tools necessary to complete this job, refer to a professional installer or
service personnel. The manufacturer is not responsible for any damages or injuries that occur due to mishandling or
improper assembly.

When using a table or bench as an aid to assembly, make sure that you put down a soft cushion or covering to prevent
accidental scratching or damage to your TV's finish.

The speaker is not intended to support the weight of your TV. Do not move or handle your TV by the speaker. This can
cause damage to your TV that is not covered by the manufacturer's warranty.

Before attempting assembly or removal of the stand, unplug the AC power cord.

Installing the stand

Locators

Locating grooves

Stand

screws

To install the stand:

1. Remove the stand from the box and place it on a table or
bench.

You must pay attention to the direction of the stand. The wide

portion of the stand should go towards the front of the TV.

2. Lay your TV flat (screen down) on the edge of a table or

bench. Make sure that you put down a soft cushion or cloth so
that your TV is not scratched.

3. Put the stand close to the TV back, align the stand with the
stand column by moving the stand steadily, and align the screw
holes on the stand column with the holes in the stand, then
secure the stand to the TV with provided screws .

To remove the stand from the TV, just detach the
screws from the stand column.

NOTE:

The appearance of this product in these illustrations may differ from your actual product, and is for comparative
purposes only.

WALL MOUNTING INSTRUCTIONS

Safety Precautions:

1. Be sure to ask an authorized service personnel to carry out setup.

2. Thoroughly read this instruction before setup and follow the steps below precisely.

3.The wall to be mounted should be made from solid materials. Only use accessories supplied by the manufacturer.

4.Very carefully handle the unit during setup. We are not liable for any damage or injury caused by mishandling or improper installation.

5.Be sure to place the unit on a stable and soft platform which is strong enough to support the unit.

6.Do not uplift the speaker when moving the display. The appearance of the unit may different from the actual ones.

7.Design and specifications are subject to change without notice.

8. Retain these instructions for future reference.

Note: All the wall mounting parts are
optional and may be unavailable in
your model.

Below we will show you how to mount the

Display on the wall using our company’s
wall mounting components.

Take out these

parts from the

box

Combination Screw

Fig.1

1. There are three options of wall mounting

ho ld er wi th different specifications

:200200,200400,200600. Please check your

wall mounting holder for its specification.

Wall Mounting Holder

Wall Mounting Connector

Expansion Bolt

Wood Screw

Wall mounting fix-h ole c ent er

X

8

200 27

Rea r wall mounting hole center

Fig.2

2. Due to the wall mounting fix-groove leaning to the

right side, the whole unit will lean to right side after

installation, please carefully measure the position of

the holes you want to drill, refer to the parameters

on Fig.2 when drilling the holes.

Note: The "X" in Fig.2 represents a data. It may be

200mm or 400mm or 600mm.

(Unit:mm)

Wall

Fig.3 a

3a. Screw 4pcs expansion bolts to fix the

wall mounting holder on the wall.

Wall

Fig.3 b

3b. If your wall is a wooden structure, please

fix the wall mounting holder on the wall

with 16pcs wood screws.

Fig.4

4. Use the 4pcs combination screws to fix

the wall mounting connector to the rear

of the display unit.(Caution:the direction

of the connectors should be strictly

confirm to the diagram illustrated above).

Fig.5

5. Put the back of the display unit close to the wall

mounting holder, insert the four wall mounting

connectors into the four calabash-shaped holes on

the wall mounting holder. (Fig.5)

Fig.6

6. Let the display unit slowly slide down to

the end of the calabash-shaped hole.

(Fig.6)

8. If you want to dismount the unit do the above steps in reverse order.

7. Push rightwards carefully until the wall

mounting connectors fully slide into the

right fix-grooves and be sure the mounting

is secure.

Fig.7

April 2011