Insignia Xoceco 19KK44 Schematic

Distributed by Xiamen Overseas Chinese Electronic Co.,LTD (XOCECO)

SERVICE MANUAL

Product Type: LCD TV Chassis: KT Chassis Manual Series: Manual Part#: 9219KK4410 Model Line: Product Year:

Product Safety Servicing Guidelines....................................................................................2

Remote Control Unit.............................................................................................................3

Main Unit (Front View/Side View/Rear View)........................................................................4

Specifications......................................................................................................................6

Alignment Instructions..........................................................................................................7

Software Upgrade Instructions...........................................................................................14

Working Principle Analysis.................................................................................................19

Block Diagram....................................................................................................................20

Wiring Diagram..................................................................................................................21

Schematic Diagram............................................................................................................22

Exploded View...................................................................................................................31

Exploded View Parts List....................................................................................................32

9219KK4410 Replacement Parts List.................................................................................33

Printed Circuit Board..........................................................................................................56

Troubleshooting Guides.....................................................................................................57

CONTENTS

Product Safety Servicing Guidelines

ATTENTION: This service manual is only for service personnel to take

reference with. Before servicing please read the following points carefully.

CAUTION: Do not attempt to modify this product in any way.

Never perform customized installations without manufacturer’s approval. Unauthorized modifications will not only void the warranty, but may lead to property damage or user injury.

Service work should be performed only after you are thoroughly familiar with these safety checks and servicing guidelines.

AC voltage must be 120V +/-10%, otherwise the power board will be burned out with AC 220V supply.

GRAPHIC SYMBOLS

The exclamation point within an equilateral triangle is intended to alert the service personnel to important safety information in the service literature.

The lightning flash with arrowhead symbol within an equilateral triangle is intended to alert the service personnel to the presence of noninsulated “dangerous voltage” that may be of sufficient magnitude to constitute a risk of electric shock.

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.

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.

8. When operating or installing LCD please don't subject the LCD

components to bending, twisting or extrusion, collision lest mishap should result.

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.

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 damage.

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.

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:

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.

LCD SERVICING PRECAUTIONS

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. 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.

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

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.

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.

Temperature

Scope for operation

0 ~ +50 oC

Scope for storage -20 ~ +60 oC

Humidity Scope for operation 20% ~ 85%

Scope for storage 10% ~ 90%

13. Display of a fixed picture for a long time may result in appearance of picture residue on the screen, as commonly called “ghost shadow”. The extent of the residual picture 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 lon g tim e.

Points for attention during installation

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

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

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

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.

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

Remote Control Unit

22 23

(power)

ZOOM

COMP

HDMI

Numbers

VOL +/VOL –

ENTER

SLEEP

MTS/SAP

INFO

VIDEO

MUTE

GUIDE

(dot)

RECALL

FAVOR ITE

INPUT

CCD

EXIT

PICTURE

AUDIO

Press to turn your TV on or off (standby mode). When your TV is turned off, power still flows into it. To disconnect all power, unplug the power cord.

Press to select the aspect ratio of the picture. You can select Norma l, Zoom, Wide, Cinema, or Auto Zoom. For more information, see “Adjusting the TV picture” on page 16.

Press to select a component input source. Press once for Component 1. Press twice for Component 2.

Press to select an HDMI input source. Press once for

HDMI 1. Press twice for HDMI 2. Press three times for HDMI 3.

Press to directly enter chan nel or FM radio frequency numbers, or to enter the Parental Control password.

Press to increase or decrease the volume.

Press to confirm selections in an on-screen menu, or to open a submenu.

Press to navigate within the on-screen menus. For more information, see “Navigating the menus” on page 14.

Press to open the on-screen menus. For more information, see “Navigating the menus” on page 14.

Press to set the sleep timer. For more information, see “Setting the sleep timer” on page 27.

Press to select the audio mode. For analog channels, you can selec t STEREO, SAP (secondary audio program), or MO NO.

For digital channels, you can select the audio track (if more than one track is available). For more information, see “Selecting the audio mode” on page 18.

Press to switch to FM radio mode. For more information, see “Switching to FM mode” on page 29.

Press to display the information banner.

Press to select TV mode.

Press to select an video input source. Press once for

AV1. Press twice for AV2. Press three times for S-VIDEO1. Press four times for S-VIDEO2.

Press to turn off the sound. Press again to restore the sound.

Press to display program guide information (if available) for DTV broadcasts.

Press to enter a program number for a digital sub-channel. For more information, see “Digital sub-channels” on page 15.

Press to return to the last channel viewed.

Press to display your favorite channel list. For more information, see “Setting up a favorite channel list” on page 20.

Press to display the input source menu. For more information, see “Selecting the video input source” on page 13.

Press to turn on closed captioning. For more information, see “Turning closed captioning on or off” on page 25.

Press to exit the on-screen menu.

Press to select the picture mode. For more information, see “Adjusting the TV picture” on page 16.

Press to select the audio mode. For more information, see “Selecting the audio mode” on page 18.

Main Unit (Front View/Side View/Rear View)

Front

Remote control sensor

Power indic ator

Side buttons

Lights blue when your TV is on. Lights red when your TV is off (standby mode). When your TV is off, power still flows into it. To disconnect all power, unplug the power cord.

CH /CH

VOL .VOL

INPUT

(power)

Press to go to the next or previous channel in the channel list.

Press to decrease or increase the volume.

Press to open the on-screen menu.

Press to open the Input Source menu and select the video input source.

Press to turn your TV on or off (standby mode). When your TV is turned off, power still flows into it. To disconnect all power, unplug the power cord.

Main Unit (Front View/Side View/Rear View)

Back

Connect a digital optical cable to this jack to output a

DIGITAL OUTPUT

HDMI1/HDMI2

12 13

VGA AUDIO/VGA PIC

AV1 VIDEO and L /R

AUDIO

COMPONENT1 IN Y, Cb/Pb, Cr/Pr and L/R

AUDIO

AUDIO OUT L/R

RS-232

S-VIDEO1

HDMI 3

digital audio signal to a digital audio amplifier. For more information, see “Connecting a digital sound system” on page 12.

Connect an HDMI device, such as a cable box or DVD player, to this jack. An HDMI cable carries both video and audio, so you do not need to make an audio connection. For more information, see “Connecting an HDMI device” on page 10.

Connect the audio and video outputs from your computer to these jacks. For more information, see “Connecting a computer” on page 11.

Connect the video and audio output from an AV device to this jack. For more information, see “Connecting a VCR” on page 9.

Connect the video and audio output from a component video device to the se jacks. For more information, see “Connecting a component video device” on page 10.

Connect these jacks to an external audio amplifier to hear your TV sound through a stereo amplifier. For more information, see “Connecting an audio amplifier” on page 11.

Connect an antenna, ca ble TV, or cable/satellite box output cable to this jack. For more information, see “Connecting an antenna, cable TV, or satellite TV box” on page 9.

For service only. Do not use.

Connect the S-Video output from a video device such as a DVD player, camcorder, or game conso le to this jack. For more information, see “Connecting a VCR’ on page 9.

SERVICE PORT

(headphone)

AV2 IN VIDEO/S-VIDEO2

and L/R AUDIO

COMPONENT2 IN Y, Cb/Pb, Cr/Pr and L/R

AUDIO

Service port for upgrading firmware. Do not use.

Connect the 75 ohm coaxial cable from an FM antenna to this jack.

Connect headphones to this jack. For more information, see “Connecting headphones” on page

12.

Connect the video and audio output from an AV device to this jack. For more information, see “Connecting a camcorder or game” on page 10.

Connect the video and audio output from a component video device to these jacks. For more information, see “Connecting a component video device” on page 10.

SPECIFICATIONS

TV type

TV panel

TV system

Channels

Audio multiplex

Audio output

Power requirement

Power consumption

Dimensions

Weig ht

Input terminals

Output terminals

Control terminals

FM radio presets

FM frequency range

LCD

19-inch TFT LCD NTSC-M, ATSC VHF: 2 - 13 UHF: 14 - 69 CATV: 1 - 125 CADTV: 1-135 DTV: 2 - 69

BTSC system 5W × 2

AC 120 V, 60 Hz 35 W

18.1 × 12.5 × 9.84 inches (19") (460 × 318 × 250 mm)

10.14 lbs. (4.6 kg) Composite video/left and right audio (2) S-Video (2) Component video/left and right audio (2) HDMI (3) VGA/audio (1) FM antenna (1) Antenna (1)

Headphone jack (1) Audio output (1) Digital output (1) RS-232 (1) Service Port (1)

87.0~107.9 MHz

Note:

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

2. Weight and dimensions shown are approximate.

3. Specifications and external appearance may be changed for the sake of improvement.

Alignment Instruction

Alignment equipment

VG848（YPbPr、VGA signal generator） VG849 ( HDMI signal generator) CA210（white balance apparatus）

Alignment flow

Test the voltage of power supply

According to the wiring diagram “9219KK4401JL”, connect main board, FM board, power board, IR board and key board correctly, then turn on the main power supply and press the key “standby”. a）Test the voltage of each pin of socket X602 in turn, please refer the voltage to the Table 1;

Table 1 Voltage of each pin of X602

X602 Pin1 2 3 4、5 6、

Voltage

3.0 V～

5.0 V

1.0 V～

3.3 V

15.0 V～

16.0 V

8 9 10 11 12 13

0～

1.0 V

4.7 V～

5.3 V

4.7

V～

5.3 V

4.5 V～

5.3 V

Alignment Instruction

Alignment flow chart

Connect to the central signal source, check if every function of TV (such as omitted channels,

analog signals control ,etc.)is normal, check if output of earphone and speakers is normal.

Input high definition signal(mode) to YPbPr, check if every function is normal.

Input VGA signal, check if display is normal, check if every function(such as analog signal

control) is normal, check if horizontal/vertical center is normal.

Input HDMI signal, check if display is normal, check if every function(such as analog signal control)

is normal, check if horizontal/vertical center is normal.

Connect external FM antenna, check if there is any omitted channel and output of speakers is

Assembling and alignment(check if the voltage is 120V)

Input signal to AV/SVIDEO, check if every function is normal.

Setup before leaving factory, check out accessories, then packaging.

Check if having written FALSH

Produce main board

White balance alignment

Fig.1 Alignment flow chart

Alignment Instruction

Alignment instruction

Unit adjustment

According to wiring diagram “9219KK4401JL”, connect main board, FM board, power board, key board and IR board correctly, connect to AC120V power supply, then power on the set, check if display is normal.

Factory menu using method a) First press key “INPUT”, then press number keys “2、5、8、0” in turn to enter initial class factory menu; b) Press keys “CH+”and“CH-”, move cursor to each adjustment page of initial class factory menu, then press key“ENTER”to enter into adjustment menu of each adjustment page; c) Press keys “CH+”and“CH-”to move cursor upwards or downwards within any adjustment page; d) Move cursor to any adjustment item, press key“VOL-”or“VOL+”to adjust it; e) Press key“MENU”to return to initial menu from any page of adjustment menu; f) Press key“EXIT”to exit factory menu at any time;按“EXIT” g) Set item “Aging Mode” as “On”to enter into factory-aging mode;

White balance adjustment

Pre-adjustment The set should be working for over 30 minutes before white balance adjustment so that it can be in a stable state. Use white balance apparatus CA210 and change to BBY channel to adjust white balance; Only need to adjust chromaticity coordinates when color temperature is 10000K (namely “COOL”) for the unit. To meet testing requirements of BBY when color temperature is 8000K or 6500K, make sure chromaticity coordinates of bright scale is X=280± 5 Y=288 ± 5, chromaticity coordinates of dark scale is X=280±8 Y=288±8; Manual adjustment of both groups of white balance datum YPbPr white balance adjustment ADC correction: Input signal with format of 720P/60 Hz and content of SMPTE color bar plus gray scale (Timing of VG848 is 976, PAT is 984 ); enter into page “Auto Color” of factory menu, set item “Source” as “VG848”, set item “Test Pattern” as “SMPTE Color Bar”, then select item “Start to do auto color” , press key “Enter”, the picture will twinkle for a moment and then return to normal, a prompt of “Auto Color Successful”will be displayed, that is, ADC correction is completed; press key “Menu” to return to the superior menu; White balance adjustment: The set should be working for over 30 minutes before white balance adjustment so that it can be in a stable state. Use apparatus CA210 and change to CH2 channel, input signal with format of 720P/60 Hz and content of 16 gray-scale, enter into page “White Balance/Color Temp” of factory menu, fix item “Green Gain”, adjust items “Red Gain、Blue Gain” to set chromaticity coordinates

Alignment Instruction

of the 13th scale as （280、288）;fix item “Green Offset”, adjust items “Red Offset、Blue Offset” to set chromaticity coordinates of the 4th scale as （280、288）. Repeat adjust items “Red Gain、 Blue Gain” and “Red Offset、Blue Offset” until chromaticity coordinates of both gray scales are （280、288）, the error of dark scale should be within ±8 and the error of bright scale should be within ±5; then press key “Menu” to return to the superior menu. Check if color temperature of “NORMAL” and “WARM” is normal (the error of dark scale should be within ±8, the error of bright scale should be within ±5); otherwise adjust item “Color Temp NORMAL” and “Color Temp WARM” to meet requirements and then save them. Note: Should not need to adjust white balance if panel has good coincidence indicator.

VGA white balance alignment ADC correction: Input signal with format of 640×480/60 Hz and content of 16 gray-scale (Timing of VG848 is 1, PAT is 921 ); enter into “Auto Color” page of factory menu, set item “Source” as “VG848”, then select item “Start to do auto color” and press key “Enter”, the picture will twinkle for a moment and then return to normal, a prompt of “Auto Color Successful”will be displayed, that is, ADC correction is completed; press key “Menu” to return to the superior menu; White balance adjustment: The set should be working for over 30 minutes before white balance adjustment so that it can be in a stable state. Use apparatus CA210 and change to CH2 channel, input signal with format of 640×480/60 Hz and content of 16 gray-scale, enter into page “White Balance/Color Temp” of factory menu, fix item “Green Gain”, adjust items “Red Gain、Blue Gain” to set chromaticity coordinates of the 13th scale as （280、288）;fix item “Green Offset”, adjust items “Red Offset、 Blue Offset” to set chromaticity coordinates of the 4th scale as （280、288）. Repeat adjust items “Red Gain、Blue Gain” and “Red Offset、Blue Offset” until chromaticity coordinates of both gray scales are（280、288）, the error of dark scale should be within ±8 and the error of bright scale should be within ±5; then press key “Menu” to return to the superior menu. Check if color temperature of “NORMAL” and “WARM” is normal (the error of dark scale should be within ±8, the error of bright scale should be within ±5); otherwise adjust item “Color Temp NORMAL” and “Color Temp WARM” to meet requirements and then save them. Note: Should not need to adjust white balance if panel has good coincidence indicator. Auto white balance adjustment Pre-ADC correction Enter into factory menu, set item “InputSource” as “Component1\Component2”, input signal with format of 720P/60 Hz and content of SMPTE color bar plus gray scale (Timing of VG848 is 976， PAT is 984), then enter into page “Auto Color”, set item “Source” as “VG848”, set item “Test Pattern” as “SMPTE Color Bar”, then select item “Start to do auto color”, press key “Enter”, the picture will twinkle for a moment and then return to normal, a prompt of “Auto Color Successful” will be displayed, that is, ADC correction is completed; press key “Menu” to return to the superior menu; then set item “InputSource” as “VGA”, input signal with format of 640×480/60 Hz and content of 16 gray-scale(Timing of VG848 is 1, PAT is 921 ), follow above steps to complete ADC correction.

Alignment Instruction

Auto white balance adjustment The set should be working for over 30 minutes before white balance adjustment so that it can be in a stable state. Connect CA210 to USB port of a compute with a data line, connect VG848 and TV to COM port or virtual COM port of a computer respectively (default connection is that VG848 to COM5 and TV to COM1; enter into administrator window with password “xoceco” to change the default connection if necessary and then save it); be sure to output VG848 signal to AV2、 YPbPr2、VGA、HDMI3 ports of TV. Open file “White_Balance.exe”, load config file “AdjustConfig.txt”, then connect CA210、VG848、 TV respectively according to the indication of interface prompt .(note: set probe as “0-CAL”before connecting to CA210, then press item “connect to CA210”, set probe as “MEAS” when a prompt “CA-210 connection and correction are normal” is displayed on the left-bottom side; default channel for CA210 is CH02 BBY; enter into administrator window with password “xoceco” to change the default setting if apparatus is different and then save it.) Press item “auto white balance adjustment”, auto-adjustment will be completed when a prompt “adjusting successfully” is displayed.

Performance checkout

TV function

Input central signal to RF port, first enter menu “CHANNELS”, then auto-search channels to check if there is any omitted channel; check if output of speakers is normal; check if picture is normal, especially make sure that the channels have been found must include ATSC and NTSC signals.

AV/S-Video interface Input signal to AV/S port respectively, check if picture and sound are normal.

YPbPr/YCbC port Input YUV signal with format listed as Table2 respectively from VG848 signal generator, check if picture and sound are normal.

Alignment Instruction

Table 2 YUV signal format

horizontal

No. definition

1 720×480i@59.94/60 Hz 15.734 59.94/60 13.5 480i(59.94/60p)

720 × 480p@59.94/60

Hz 1280 × 720p@59.94/60

Hz 1920 × 1080i@59.94/60

Hz 1920×1080p@23.98/24

Hz 1920×1080p@59.94/60

VGA port Input VGA signal with format listed as Table3 respectively from VG848 signal generator, check if picture and sound are normal. If there is any error, please enter into menu “SETTINGS” and select item “Computer Settings” to correct it automatically.

horizontal

No. definition

720 × 400@70

Hz 640 × 480@60

Hz 800 × 600@60

Hz 1024×768@60

Hz 1280 ×

1024@60 Hz 1360×768@60

Hz 1920 ×

1080@60 Hz

frequency

31.47 70.08 28.32 DOS

31.50 60.00 25.18 VESA

37.90 60.00 40.00 VESA

48.40 60.00 65.00 VESA

63.98 60.02 108.00 VESA(only for Full HD

47.71 60.01 85.50 VESA(only for 1366X768

67.16 59.96 173.00 VESA(only for Full HD

frequency

kHz

31.469 59.94/60 27.00 480p(59.94/60p)

44.96 59.94/60 74.18 720p(59.94/60p)

33.75 59.94 74.25 1080i(59.94/60i)

27.00 23.98/24 74.25 1080i(23.98/24p)

67.50 59.94/60 148.50 1080p(59.94/60p)

Table 3 VGA signal format

vertical

frequency

kHz

vertical

frequency

dot pulse

frequency

MHz

dot pulse

frequency

MHz

panel)

memo

Alignment Instruction

HDMI port

Input HDMI signal with format listed as Table2 respectively from VG849 signal generator, check if picture and sound are normal. FM port Connect to FM external antenna, enter into FM menu to auto-search channels, check if there is any omitted channel; check if output of speakers is normal. Note: The place of TV set or antenna would have an effect on searching channels under the circumstances of week signal input.

User menu setup before leaving factory

Enter into factory menu, select item “Reset to default”, the machine will preset items of user menu automatically before leaving factory. Be sure to do this step after alignment in the factory.

Software writing instruction

Table 4 software writing instruction

location number

N109 5272532004 W25X32VSS FLASH YES writing with ALL11,etc.

part number part model

software

function

instruction

software writing

before SMT

software writing method

Software Upgrade Instruction

The model can be upgraded from port of USB or RS232. Upgraded from USB is recommended for only a U disk is needed and upgrading speed is faster. Upgraded from RS232 can be used under the circumstances of failure to be upgraded from USB. Besides a computer and a serial line are needed, upgrading speed from RS232 is slower.

Upgraded from USB

Copy upgrading file “zTVApp_rom_aes.ecc”to the root directory of a U disk. Be sure that there is only one file with name “.ecc”in the U disk:

1. Connect to AC power supply, power on the set and wait until the set works normal;

2. Insert the U disk to USB port and a figure will be displayed as Fig.1 ;

Fig.1

If there is not a figure displayed as Fig.1 after insert the U disk, please pull out the U disk and insert it again; if a figure as Fig.1 can not be displayed in any case, please power off/on the set again and check out upgrading files and the U disk;

3. Select item “YES” and press button “OK”, the set will be upgraded automatically for about a few minutes, then a figure as Fig.2 will be displayed after upgrading successfully;

Software Upgrade Instruction

Fig.2

4. Power off the AC power supply, pull out the U disk, then power on the set again

to complete the upgrading process.

Upgraded from RS232

A computer and a serial line are needed. Online upgrading tool can be used with file“iDev.exe” of Zoran. Upgrading process will last for a little long time.

1. Connect the serial line correctly(transferred by a earphone line), then open the upgrading file “iDev.exe”;

Software Upgrade Instruction

Fig. 3

1. Press button “setup” as Fig. 4;

Fig. 4

Setup items “Serial Port” and “Baud Rate” correctly, select “Image Path” as Fig. 4 to load upgrading file “zTVApp_rom_aes.ecc”，select item “Update boot sector”, press button “OK”， then return to display a figure as Fig. 3;

Software Upgrade Instruction

3. Press button “down” as Fig. 5;

Fig. 5

A figure will be displayed as Fig. 6 if serial port has been occupied;

Fig. 6

Now first close the software which is occupying serial port, then press button “down” again;

Software Upgrade Instruction

4. Power off/on the set again, then begin upgrading process as Fig. 7;

Fig. 7

5. It will take a few minutes to upgrade until a figure as Fig. 8 displayed;

Fig. 8

6. Power off the AC power supply, then power on the set again to complete the upgrading process.

Working Principle Analysis

TV channel

The signal is inputted to TUNER and then to IF from RF. IF signal is inputted to main chip to be demodulated by NTSC ， ATSC and BTSC sections respectively, all of demodulation are completed within main chip.

HDMI，AV，SV，YPBPR and VGA signals are inputted to main chip directly without any outside switch and EEPROM.

FM radio channel

FM signal is inputted from external antenna, then analog audio signal processed by chip Si4702 is outputted to main chip.

USB channel

Only used to upgrade software without other functions developed

Sound

Both analog audio signals are outputted from main chip, signal of channel 1 is outputted to speakers after amplified by power amplifier, signal of channel 2 is outputted to Audio Out after amplified by earphones amplifier.

LC- 19KK44 Block Diagram

15V、5V、3.3V、1.8V、1.1V

5.0VSTB。3.3VSTB。1.8VSTB

USB

ANOLOG

AUDIO

INPUTS

FM Si4702

TUNER

TD1136/FV

AV 1

AV 2

SVIDEO 1

POWER

AUDIO

DIF

I2C

DDR SDRAM

K4T51163QG-HCF7

ZR39775

SPI FLASH

W25X32VSSIG-E

Panel

LVDS

SPEAKER

AMP

R2S15112PF

SVIDEO 2

YPbPr 1

YPbPr 2

VGA

HDMI 1

HDMI 2

HDMI 3

HP802

I2C

HP AMP BH3547F

RS232

Audio out

SPDIF

ABCDEF

LC-l9KK44

Wiring Diagram

LCD panel

LVDS cable

key board

remote receive board

FM board

X604 3 pin

X405 4 pin

X601 5 pin

X501 40 pin

power board

main board

X602 13 pin

+ 46 hidden pages