LG 26LH1DC1-UB.pdf

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LCD TV

SERVICE MANUAL

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

MODELS : 26LH1DC1-UB

website:http://biz.LGservice.come-mail:http://www.LGEservice.com/techsup.html

Internal Use Only

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CONTENTS

CONTENTS.........................................................................................

SAFETY PRECAUTIONS ...................................................................

SPECIFICATION.................................................................................

ADJUSTMENT INSTRUCTION..........................................................

SVC REMOCON .................................................................................

TROUBLE SHOOTING GUIDES .......................................................

TROUBLE SHOOTING .......................................................................

BLOCK DIAGRAM..............................................................................

VIDEO AND AUDIO SIGNAL FLOW CHART ...................................

WIRING DIAGRAM .............................................................................

EXPLODED VIEW...............................................................................

EXPLODED VIEW PARTS LIST ........................................................

REPLACEMENT PARTS LIST ...........................................................

SVC. SHEET .......................................................................................

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SAFETY PRECAUTIONS

Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are

Schematic Diagram and Replacement Parts List.

It is essential that these special safety parts should be replaced with the same components as recommended in

Shock, Fire, or other Hazards.

Do not modify the original design without permission of manufacturer.

General Guidance

An isolation Transformer should always be used during theservicing of a receiver whose chassis is not isolated from the AC

power line. Use a transformer of adequate power rating as this

protects the technician from accidents resulting in personal injury

from electrical shocks.

It will also protect the receiver and it's components from being

damaged by accidental shorts of the circuitry that may be

inadvertently introduced during the service operation.

If any fuse (or Fusible Resistor) in this TV receiver is blown,replace it with the specified.

When replacing a high wattage resistor (Oxide Metal Film Resistor,

over 1W), keep the resistor 10mm away from PCB.

Keep wires away from high voltage or high temperature parts.

Before returning the receiver to the customer,

always perform an AC leakage current check on the exposedmetallic parts of the cabinet, such as antennas, terminals, etc., to

be sure the set is safe to operate without damage of electrical

shock.

Leakage Current Cold Check(Antenna Cold Check)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 1M and 5.2M.

When the exposed metal has no return path to the chassis the

reading must be infinite.

An other abnormality exists that must be corrected before the

receiver is returned to the customer.

Leakage Current Hot Check(See beloPlug the AC cord directly into the AC outlet

Do not use a line Isolation Transformer

Connect 1.5K/10watt resistor in parallel

between a known good earth ground (W

and the exposed metallic parts.

Measure the AC voltage across the resis

with 1000 ohms/volt or more sensitivity.

Reverse plug the AC cord into the AC outle

measurements for each exposed meta

measured must not exceed 0.75 volt RMS

0.5mA.In case any measurement is out of the l

possibility of shock hazard and the set

repaired before it is returned to the custom

Leakage Current Hot Check circuit

1.5 Kohm/10W

To Instrument'sexposedMETALLIC PARTS

AC Volt-meter

IMPORTANT SAFETY NOTICE

0.15uF

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CAUTION : Before servicing receivers covered by this service

manual and its supplements and addenda, read and follow the

SAFETY PRECAUTIONSon page 3 of this publication.NOTE : If unforeseen circumstances create conflict between the

following servicing precautions and any of the safety precautions on

page 3 of this publication, always follow the safety precautions.

Remember: Safety First.

General Servicing Precautions

1. Always unplug the receiver AC power cord from the AC power

source before;

a. Removing or reinstalling any component, circuit board

module or any other receiver assembly.

b. Disconnecting or reconnecting any receiver electrical plug or

other electrical connection.

c. Connecting a test substitute in parallel with an electrolytic

capacitor in the receiver.

CAUTION : A wrong part substitution or incorrect polarity

installation of electrolytic capacitors may result in an

explosion hazard.

2. Test high voltage only by measuring it with an appropriate high

voltage meter or other voltage measuring device (DVM,

FETVOM, etc) equipped with a suitable high voltage probe.

Do not test high voltage by "drawing an arc".3. Do not spray chemicals on or near this receiver or any of its

assemblies.

4. Unless specified otherwise in this service manual, clean

electrical contacts only by applying the following mixture to the

contacts with a pipe cleaner, cotton-tipped stick or comparable

non-abrasive applicator; 10% (by volume) Acetone and 90% (by

volume) isopropyl alcohol (90%-99% strength)

CAUTION : This is a flammable mixture.

Unless specified otherwise in this service manual, lubrication of

contacts in not required.5. Do not defeat any plug/socket B+ voltage interlocks with which

receivers covered by this service manual might be equipped.

6. Do not apply AC power to this instrument and/or any of its

electrical assemblies unless all solid-state device heat sinks are

correctly installed.

7. Always connect the test receiver ground lead to the receiver

chassis ground before connecting the test receiver positive

lead.

Always remove the test receiver ground lead last.

8. Use with this receiver only the test fixtures specified in this

service manual.

CAUTION : Do not connect the test fixture ground strap to any

heat sink in this receiver.

Electrostatically Sensitive (ES) Devices

Some semiconductor (solid-state) devices can be damaged easily

by static electricity. Such components commonly are called

El t t ti ll S iti (ES) D i E l f t i l ES

2. After removing an electrical assem

devices, place the assembly on a con

aluminum foil, to prevent electrostaexposure of the assembly.

3. Use only a grounded-tip soldering iron

devices.

4. Use only an anti-static type solder remo

removal devices not classified as "a

electrical charges sufficient to damage E

5. Do not use freon-propelled chemical

electrical charges sufficient to damage E

6. Do not remove a replacement ES de

package until immediately before you

(Most replacement ES devices are

electrically shorted together by conduc

or comparable conductive material).

7. Immediately before removing the prot

leads of a replacement ES device, touc

to the chassis or circuit assembly into

installed.

CAUTION : Be sure no power is ap

circuit, and observe all other safety prec

8. Minimize bodily motions when h

replacement ES devices. (Otherwise hthe brushing together of your clothes fa

foot from a carpeted floor can gen

sufficient to damage an ES device.)

General Soldering Guidelines

1. Use a grounded-tip, low-wattage solde

tip size and shape that will maintain ti

range or 500F to 600F.

2. Use an appropriate gauge of RMA res

of 60 parts tin/40 parts lead.3. Keep the soldering iron tip clean and we

4. Thoroughly clean the surfaces to be so

bristle (0.5 inch, or 1.25cm) brush with a

Do not use freon-propelled spray-on cle

5. Use the following unsoldering technique

a. Allow the soldering iron tip to reach n

(500F to 600F)

b. Heat the component lead until the so

c. Quickly draw the melted solder wit

type solder removal device or with so

CAUTION : Work quickly to a

circuitboard printed foil.

6. Use the following soldering technique.

a. Allow the soldering iron tip to reac

(500F to 600F)

b. First, hold the soldering iron tip and

the component lead until the solder m

Q i kl th ld i i ti

SERVICING PRECAUTIONS

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IC Remove/Replacement

Some chassis circuit boards have slotted holes (oblong) through

which the IC leads are inserted and then bent flat against the

circuit foil. When holes are the slotted type, the following technique

should be used to remove and replace the IC. When working with

boards using the familiar round hole, use the standard technique

as outlined in paragraphs 5 and 6 above.

Removal

1. Desolder and straighten each IC lead in one operation by gently

prying up on the lead with the soldering iron tip as the solder

melts.

2. Draw away the melted solder with an anti-static suction-type

solder removal device (or with solder braid) before removing the

IC.

Replacement1. Carefully insert the replacement IC in the circuit board.

2. Carefully bend each IC lead against the circuit foil pad and

solder it.

3. Clean the soldered areas with a small wire-bristle brush.

(It is not necessary to reapply acrylic coating to the areas).

"Small-Signal" Discrete Transistor

Removal/Replacement

1. Remove the defective transistor by clipping its leads as close as

possible to the component body.2. Bend into a "U" shape the end of each of three leads remaining

on the circuit board.

3. Bend into a "U" shape the replacement transistor leads.

4. Connect the replacement transistor leads to the corresponding

leads extending from the circuit board and crimp the "U" with

long nose pliers to insure metal to metal contact then solder

each connection.

Power Output, Transistor Device

Removal/Replacement

1. Heat and remove all solder from around the transistor leads.

2. Remove the heat sink mounting screw (if so equipped).

3. Carefully remove the transistor from the heat sink of the circuit

board.

4. Insert new transistor in the circuit board.

5. Solder each transistor lead, and clip off excess lead.

6. Replace heat sink.

Diode Removal/Replacement

1. Remove defective diode by clipping its leads as close as

possible to diode body.2. Bend the two remaining leads perpendicular y to the circuit

board.

3. Observing diode polarity, wrap each lead of the new diode

around the corresponding lead on the circuit board.

4. Securely crimp each connection and solder it.

5. Inspect (on the circuit board copper side) the solder joints of the

two "original" leads If they are not shiny reheat them and if

Circuit Board Foil Repair

Excessive heat applied to the copper fo

board will weaken the adhesive that bon

board causing the foil to separate from o

following guidelines and procedures shou

this condition is encountered.

At IC Connections

To repair a defective copper pattern at

following procedure to install a jumper wir

side of the circuit board. (Use this

connections).

1. Carefully remove the damaged copp

knife. (Remove only as much copper as

2. carefully scratch away the solder resisused) from the end of the remaining cop

3. Bend a small "U" in one end of a smal

carefully crimp it around the IC pin. Sold

4. Route the jumper wire along the path

pattern and let it overlap the previously

copper pattern. Solder the overlappe

excess jumper wire.

At Other Connections

Use the following technique to repair the at connections other than IC Pins. This

installation of a jumper wire on the comp

board.

1. Remove the defective copper pattern w

Remove at least 1/4 inch of copper, to

condition will not exist if the jumper wire

2. Trace along the copper pattern from b

break and locate the nearest comp

connected to the affected copper patter

3. Connect insulated 20-gauge jumper w

nearest component on one side of the

of the nearest component on the other s

Carefully crimp and solder the connectio

CAUTION : Be sure the insulated jump

it does not touch components or sharp e

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Item Specification

SPECIFICATION

NOTE : Specifications and others are subject to change without notice for improvement.

1. Application range1.1 This spec sheet is applied all of the 26" LCD TV with PPV&PILLOW SPEAKER.

1.2 Not included spec and each product spec in this spec sheet apply correspondingly to thefollowing each coun

requirement of Buyer.

2. SpecificationEach part is tested as below without special appointment.

2.1 Temperature : 20 5C2.2 Relative Humidity : 65 10%

2.3 Power Voltage : input voltage(100~240V@50/60Hz)* Standard Voltage of each product is marked by models.

2.4 Specification and performance of each parts are followed each drawing and specification by part number in a

2.5 The receiver must be operated for about 20 minutes prior to the adjustment.

3. General Specification(TV)

Input Signal Receiving System Digital : ATSC/64&256QAM, Analog : NTSC

Sound Effect Dolby Digital(AC-3)

Available Channel Air CH2~CH69Cable CH1~CH135

Input Voltage AC 100~240V(50/60Hz)

Market North America

Screen Size 26 inch Wide

Aspect Ratio 16:9

Tuning System FS

LCD Module LC260WX2-SLB2 LPL

LC260WX2-SLB1 LPL

LC260WX2-SLA1 LPLVideo Stream Compression MPEG2 MP@HL

Receiving Signal 8VSB, Clear QAM(64, 256), NTSC

Display Interface LVDS 1366X768

Digital Comb-filter Support : 3D Y/C-NTSC Signal

Audio Demodulation Dolby Digital(AC3)

Speaker Power RMS 7.5W+7.5W(8 load)

Antenna Impedance 75 Unbalanced, F-Type Jack, VHF/UHF Tuner

External Input AV Input CVBS : 3, L/R Audio : 3, Auto-Cam port(AV2)

S-Video Input Y/C : 1

Component Input YPbPr(480i~1080i) : 2, L/R Audio : 2

PC Input D-sub15(Max 1366X768 pixel, 60Hz), Phone Jack

HDMI Input 480i, 480p, 720p, 1080i

Service Port DSUB 9P Jack(RS-232)

PILLOW SPEAKER Input DIGITAL PILLOW SPEAKER

MPI Input RJ11 Jack

Digital Audio Output SPDIF(Optical)

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Item Min Typ Max Unit Rema

Dynamic Range -82 -5 dBm 2CH,

White Noise(SNR) 15.5 dB

Channel Pull-in Range -250 250 KHz

N/D Co-channel DTV(-30dBm) 5 dBPs=7Db , Color Bar

400Hz, 25kHz Dev DTV(-60dBm) 5 dB

N/D Upper Adj-Ch

PS=75Db, Color Bar DTV(-60dBm) 35 42 dB

400Hz, 25kHz Dev

N/D Lower Adj-Ch

PS=75Db , Color Bar DTV(-60dBm) 35 42 dB

400Hz, 25kHz Dev

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Content Unit Spec Remark

Min Typ MaxVIDEO


Doppler Ghost 0.2Hz 4

(0.3 usec) 0.5Hz 4

(1.0 usec) 1.0Hz 4 dB

(5.0 usec) 2.0Hz 45.0Hz 4


Dynamic Range 64 QAM -69.0 -32.0 dBm

256 QAM -63.0 -32.0 dBm

White Noise(SNR) 64 QAM 27 dB Input

256 QAM 34 dBChannel Pull-in Range (64/256 QAM) -170 170 KHz

N/D Upper Adj-Ch 64 QAM 21 dB DTV(PS=75Db, Color Bar

400Hz, 25kHz Dev 256 QAM 16 dB DTV(

4.3 Digital Receive Part : 64/256 QAM

Input CVBS 1V 480i

-Active Video mV 644 714 786

-Sync 258 286 314

S-Video 1V

-Active Video mV 644 714 786

-Sync 258 286 314

-Color Burst 258 286 314

Component 1V 480i/480p/720p/108

-Y/Pb/Pr mV 630 700 770-Sync 270 300 330

RGB Input DTV : 480i/480p/720

-R/G/B mV 630 700 770 PC : *See 5. Signal

-H/V TTL

4.4 Video Inputs

4.5 Audio

Content Unit Spec Remark

Min Typ Max

AUDIO (Dolby Digital 2CH Out)OPTICAL UI(EYE PATTERN) % 20 IEC958 COMPOSIT

OUTPUT CATEGORY 64(HEX)

CODE

ANALOG REF. LEVEL @1kHz, -20dBFs

AUDIO -LEFT mVrms 200

OUT -RIGHT 200

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THD+N vs FREQ.

-LEFT dBFs -60

-RIGHT -60

THD vs LEVEL @-20dBFs

-LEFT dBFs -60-RIGHT -60

*DYNAMIC

RANGE -65

-16BIT(L, R) dB -65

-18BIT(L, R) -65

-20BIT(L, R)

*Dynamic Range Control (DRC) is originally the concept of Dolby Digital and used only in Dolby Digital.

But as a similar concept there is the Automatic Volume Correction in the analog TV, and it is used in the sam

because there is no possibility of conflict between the two.

Therefore, if you turn on the DRC in the menu, the DRC will be active in the digital TV and AVC will be activ

5. Signal Timing (Resolution)5.1 Component Video Input (Y, CB/PB, CR/PR)

5.2 PC Mode (RGB)

No. Resolution H-freq.(kHz) V-freq.(Hz) Pixel Clock(MHz) Pr1 640*350 31.469 70.087 25.17 EG

2 720*400 31.469 70.087 28.32 DO

3 640*480 31.469 59.94 25.175 VG

4 640*480 37.5 75 31.5 VG

5 640*480 43.269 85.008 36 VG

6 800*600 37.879 60.317 40 SV

7 800*600 46.875 75 49.5 SV8 800*600 53.674 85.061 56.25 SV

9 832*624 49.726 75.552 58.05 M

10 1024*768 48.363 60.004 65 XG

11 1024*768 60.023 75.029 78.75 XG

12 1024*768 68.677 84.997 94.5 XG

No. Resolution H-freq.(kHz) V-freq.(Hz) Pixel Clock(MHz) Pr

1 720*480 15.75 60 13.51 SD

2 720*480 15.734 59.94 13.5 SD

3 720*480 31.5 60 27.03 SD

4 720*480 31.469 59.94 27 SD

5 1280*720 45 60 74.25 H

6 1280*720 44.96 59.94 74.18 H

7 1920*1080 33.75 60 74.25 H

8 1920*1080 33.72 59.94 74.18 H

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5.3 DVI/HDMI Input : HDMI Ver1.2a

No. Resolution H-freq.(kHz) V-freq.(Hz) Pixel Clock(MHz) Pr

1 640*480 31.469 59.94 25.17 VG

2 640*480 37.861 72.8 31.5 VG

3 640*480 37.5 75 31.5 VG

4 640*480 43.3 85 36 VG

5 800*600 35.156 56.25 36 SV

6 800*600 37.879 60.31 40 SV

7 800*600 48.077 72.18 50 SV

8 800*600 46.875 75 49.5 SV

9 800*600 53.7 85 56.25 SV10 1024*768 48.363 60 65 XG

11 1024*768 56.476 70.06 75 XG

12 1024*768 60.023 75.02 78.75 XG

13 1024*768 68.7 85 94.5 XG

14 1280*768 47.78 59.87 79.5

15 1360*768 47.72 59.8 84.75

16 720*400 31.43 70 27.28 DO17 720*480 15.75 60 27.03 SD

18 720*480 15.734 59.94 27 SD

19 720*480 31.5 60 31.5 SD

20 720*480 31.469 59.94 59.94 SD

21 1280*720 45 60 74.25 H

22 1280*720 44.96 59.94 74.18 H

23 1920*1080 33.75 60 74.25 H

24 1920*1080 33.72 59.94 74.18 H

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ADJUSTMENT INSTRUCTION

1. Service Menu

To enter the Service Menu, press the MENU button of the TV SET for5 seconds while keeping the MENU key of the INSTALLER remote

controller pressed.

When using the Service Remote controller, press the IN-START or

ADJ to enter the Service Menu.

Use the channel UP/DOWN key to move between the items of the

Service Menu.

In the Service Menu, use the left and right key or volume key to adjust the

value in the Sub Item.

In the Service Menu, press ENTER to return to the Main Item from the

Sub Item.

Press exit in the main item to end the Service Menu.

Unlike other OSD, the Service Menu does not have any Timeout Exit.

1.1 Service Menu Structure

System Reset ConfirmSoftware VersionChip I2C Test Memory

FLASHEEPROM

TUNERVIDEO ADCAUDIO DECUart1 Comm.Pillow ModeUart Mode

Aging TestWhite Balance Offset R

Offset GOffset BGain RGain GGain B

YPbPr : offset/gain Offset YOffset PbOffset PrGain YGain PbGain PrReset Mode

RGB : offset/gain Offset ROffset GOffset BGain RGain G

Gain BReset Mode

Auto Picture Auto BrightnessAuto Contrast

Running Time - Running TimeReset Mode

System All Reset ConfirmAudio Delay DTV

ATV/CVBS/YC

1.2 Service Menu Description

(1) System Reset :When you press Confirm, the general NV

the parameters of the service scope are in

(This is mainly used after repairing or repla

initial factory condition.)

(2) Software Version :

This shows you the information of the curre

The displayed information includes Versi

Panel information.

(3) Chip I

2

C Test :It shows you whether there is any issue in

on the Board at its basic level.

(4) Aging Test :

When you press Confirm, the service

disappears and single color Pattern is disp

When you press ENTER key, it returns to

(5) White Balance :

Control the offset/gain of the final end of th

balance. The adjustment is done by contr

R, G and B.

The Color temperature is adjusted during

9800K500 in 100% White pattern.(Default : Offset R, G, B=50, 50, 50/Gain

(6) YPbPr : offset/gain : Mst9883C Adjust

Calibrate the Offset/Gain of Mst9883(Video

Because the deviation of Mst9883 is not

separate calibration.

(Default : Offset Y, Pb, Pr=24, 51, 51/Gain

(7) RGB : offset/gain : RTD2023B Adjust

Calibrate the Offset/Gain of the Scaler for P

After connecting 16-gray or 32-gray pattern

RGB : offset/gain, press ENTER button on

When the Reset Mode is shown, press

remote controller to execute auto calibratio

Scaler checks the gray pattern of input a

gain automatically to show you the values.

(Default : Offset R, G, B=128, 128, 128/Gain

(8) Auto Picture :

Adjust the range of brightness and co

standard of Video Preset.

When you adjust this value, it gives the s

mild of Video Preset.

The Standard Brightness can be differently

characteristics of the Panel.

That is, for the panel characteristics with l

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(10) System All Reset :

It reboots itself after initializing not only the general NVRAM

Parameter but also Service Parameter.

(White Balance, YPbPr offset/gain, RGB offset/Gain etc.)

*** Therefore do not run System All Reset unless it is a special case.

If this item must be initialized, write down the adjusted value after

factory delivery of Panel brightness, Auto Picture, White Balance,

YPbPr offset/gain and RGB offset/Gain on paper then execute the

initialization.

Then after the execution, use the remote controller to re-enter the

written value without separate adjustment, and you can realize

the same TV quality.

(11) Audio Delay

Adjust the Audio Delay. The Group can be classified into 3 types.

- DTV Group- ATV/CVBS/YC Group

- COMP/PC/HDMI Group

(12) AI Control :

This is the function to set ON/OFF to support the AI automatically in

the panel that supports the DCR(Dynamic Contrast Ratio) function.

*** The Default value is OFF and must be maintained at OFF without

separate notification.

(13) Last Power Save :

This is the item to set whether to save the Last Power.

(14) Panel Monitoring :

This is the item to set whether to use Panel Abnormal Detection

Monitoring.

(15) Panel ID :

This is the item to set the Panel ID.

You can set the Display ID, Panel Company ID and Model ID of the

Panel currently connected.

The Display ID is fixed to LCD and the Panel Company ID toggles

among LG, SAMSUNG and AUO.

When the Panel Company ID is decided, you must set the Model IT

accordingly.

(16) Commercial Flag :

This is the item to set whether to communicate with the Network

Board or operate Stand alone.

This must always be set to ON unless it is a special testing

environment.

(17) Panel Brightness :

This is the item to adjust the brightness of the panel.

The default set value is 70 and can be adjusted to between 1 and 100.When the value is set to 1, it is the lowest value (20%) and when set to

100, it is the highest brightness (100%).

The PWM signal sent out from MICOM is converted to DC voltage to

adjust the brightness of the panel.

As a reference, the DC voltage value sent out from the board

according to the set value is as follows.

Under the condition of HDMI 1080i Inp

Color temperature : Normal.

Set the generator signal source to Grays1

Change to the HDMI input mode, observe

Adjust the PANEL BRIGHT item of the TV

the measured Bright Value of the CA-210

2nd bars from Left side of the GRAYS1

screen.

If you couldnt get the suitable Bright V

AUTO BRIGHT of the AUTO PICTURE it

(18) Epg Mode :

This is the item to set the condition of Epg

It Toggles among Mini, Full and None.

(19) SW Upgrade :

This is the item to Upgrade the Software Send the stream with the Upgrade prog

using the generator and setup as follows.

- RF Mode (Air or Cable) selection : For t

press left/right to select 0(Air) or 1(Cable

- RF Freq : Select the channel number w

- FE Mode(VSB/64QAM/256QAM) : Use

remote controller to select 0(VSB), 1(64

But you must not set 64QAM/256QAM f

After completing the all the settings, sele

upgrade.When all the upgrade is normally co

automatically reboot. Even if it fails, you

then turn it back on to return to its norma

(20) EXIT

Exit the Service Menu.

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2. Software Upgrade

2.1 Serial Upgrade

(1) DTV B/D Program Download

[Preparations]

Required equipment : PC, D-SUB 9pin Female to Female cross type

RS-232C cable

S/W : KMCOMM.exe

[Menu item description]

Exit : End the program.

Port : Setup the serial port for the Host to use. COM1~COM4

Connect : KMCOMM uses the host serial port setup in .

Model : Main chipset type setup to be used in TV.

(For this model it is SupraHD)

Data Type : Setup the S/W type of file to Download.

Speed : Increase the download speed up to twice Dynamically.

Download File Browse : Select the *.mem file to Download.

Download File Status : This indicates the files setup to currentlydownload.

Ready : Standby until the TV can communicate with KMCOMM.

Stop : Stop the standby for communication with the TV.

Download Progress : This indicates the progress of download

to the TV.

As the window to show you the download status in message,

you can see the progress status in detail.

[Executing order]

1) Unplug the power cord of the TV.2) Set the RS-232C SELECT switch on the back of the TV in the

direction of NORMAL(DTV).

3) With the RS-232C Cable, connect the RS-232C port of the TV

and the COM port of the PC.

4) Execute the KMCOMM.exe program on the PC.

5) After checking the port number connected to the TV from

Control Panel System Hardware Device Manager

7) Click on the Download File Browse but

and click on the Open button.

8) Click on the Connect button of the Con

check whether the Ready button of the

activated.

(At this time, check whether

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(2) Control B/D Program Download

[Executing order]

1) Check whether the TV is for lodging or Healthcare.

2) Unplug the power cord of the TV.

3) Set the RS-232C select switch on the back of the TV in the

direction of CONTROL.

4) With the RS-232C cable, connect the RS-232C port of the TV

and the COM port of the PC.

5) Execute Hyper Terminal program of PC and assign the Name and Icon.

6) After checking the port number connected to the TV fromControl Panel System Hardware Device Manager

Ports, set the Port for the Connect using.

7) Set 115200 for Bit per second, 8 for Data bits, None for Parity,

1 for Stop bits, None for Flow control, and then click on OK button.

8) Check if the Hyper Terminal is conne

Turn on the TV while pressing the UPD

rear part of TV, and check the following

9) Input a to execute the Erase Flash. When it

input b to execute the Program Flash.

10) Click on the Transfer menu on the abov

Select the .s19 file to download and click

(Check whether the TV is for lodging

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11) Check if the Downloading process is as following and wait

until it completes. (Make sure the power is not disconnected

before the download is complete.)

12) When the downloading process is completed and it shows the

menu screen, turn off TV and then turn it on again.

13) Change the RS-232C SELECT Switch on the rear part of TV

into the NORMAL(DTV) and turn it off.

Turn it on again after 5 seconds.

14) Check the PTC Version from Service Menu of the TV.

(3) RF Upgrade

This is how to upgrade program in the TV set without any

separate equipment.

ATSC Stream generator sends the stream with the upgrade

program, and the SW Upgrade is selected from the service

menu of the TV to execute the setting.

- Select RF Mode(Air or Cable) : Press the left/right button on the

remote controller to select 0(Air) or 1(Cable).

- RF Freq : Select the channel number including the upgrade

program Stream.

- FE Mode(VSB/64QAM/256QAM) : Use the left/right button

of the remote controller to select 0(VSB), 1(64QAM) or 2(256QAM).

But you must not set 64QAM/256QAM for Air.

After completing the all the settings, select upgrade start to

start the upgrade.

[Wiring diagram of EEPROM 24LC02 and

[Wiring diagram of EEPROM 24LC02 and

[Data read of EEPROM using RGB PC po

1) Connect the USB port of the PC and the

using the USB Cable, and connect the Uthe TV using the HDMI and RGB PC ED

2) Execute the UprogHS 48 Potable progra

3) Click on the Device button and sele

the Device.

4) Click on the Read button of the SINGLE

EEPROM.

5) Proceed by clicking on the butt

6) After checking the , c

from EEPROM with the Default Data.

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[Data Write of EEPROM using RGB PC port and HDMI port]

1) Connect the USB port of the PC and the UprogHS 48 Potable

using the USB Cable, and connect the UprogHS 48 Potable with

the TV using the HDMI and RGB PC EDID Cable.

2) Execute the UprogHS 48 Potable program.

4) Click on the Device button and select the 24LC02B/TSOP as

the device.

5) Click on the button of Buffer group and open the .dat fileto Write on the EEPROM, and then click on .

6) After clicking the PROGRAM Tab, click on button to write on

EEPROM when the Erase, Blank check, Program and Verify

button are activated.

7) Proceed by clicking on the button.

8) After checking the end the program.

[RGB PC EEPROM Default Data]

[HDMI EEPROM Default Data]

ADDRESS BUFFER

0 1 2 3 4 5 6 7 8

00000000 00 FF FF FF FF FF FF 00 4E

00000010 00 10 01 03 81 50 2D 78 0A

00000020 0F 50 54 AF EE 00 31 59 4500000030 01 01 01 01 01 01 64 19 00

00000040 36 00 C4 8E 21 00 00 18 1B

00000050 48 88 35 00 C4 8E 21 00 00

00000060 55 20 50 0B 00 0A 20 20 20

00000070 00 48 44 54 56 20 20 20 20

00000080 02 03 1B F2 44 85 84 03 07

00000090 83 01 00 00 66 03 0C 00 10

000000A0 1C 16 20 58 2C 25 00 C4 8E

000000B0 72 51 D0 1E 20 6E 28 55 00

000000C0 0A D0 8A 20 E0 2D 10 10 3E

000000D0 18 8C 0A A0 14 51 F0 16 00

000000E0 00 00 98 0E 1F 00 80 51 00

000000F0 8E 21 00 00 1E 00 00 00 00

ADDRESS BUFFER

0 1 2 3 4 5 6 7 8

00000000 00 FF FF FF FF FF FF 00 4E

00000010 00 10 01 03 08 50 2D 78 0E

00000020 0F 50 54 AF EE 00 31 59 45

00000030 01 01 01 01 01 01 1B 21 50

00000040 35 00 C4 8E 21 00 00 18 0E

00000050 40 80 37 00 C4 8E 21 00 00

00000060 5A 20 50 0B 00 0A 20 20 20

00000070 00 48 44 54 56 20 20 20 20

00000080 FF FF FF FF FF FF FF FF FF

00000090 FF FF FF FF FF FF FF FF FF

000000A0 FF FF FF FF FF FF FF FF FF

000000B0 FF FF FF FF FF FF FF FF FF

000000C0 FF FF FF FF FF FF FF FF FF000000D0 FF FF FF FF FF FF FF FF FF

000000E0 FF FF FF FF FF FF FF FF FF

000000F0 FF FF FF FF FF FF FF FF FF

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3. Commercial Interface Installers Menu Setting

3.1 Accessing the Installers MenuMake sure TV is on. Installers menu items can be accessed by using an installers remote control.

Just press MENU repeatedly(at least 10 times) until the TV seems to stop responding, then press 9, 8, 7, 6, then ENTER.

To exit the Installers Menu, press ENTER again. Any changes you make will be stored in nonvolatile memory.(The menu also d

The Installers menu opens with item 000 INSTALLER SEQ 000. Use the Up/Down arrow keys to sequence through the available

Or, access an item directly by keying in the line number, then pressing MENU. For example, to access the Sleep Timer option w

press 0-1-5, then MENU. To change a setting, use the Left/Right arrow keys. Or, enter a value directly. Press ENTER to remove

Typical Installer Menu

26LH1DC1-UB INSTALLER MENU

000 INSTALLER SEQ 000

UPN : 000-000-000-000 FPGA 09F1

PTC V1.00.000 CPU V1.25.00

3.2 Using the Installers MenuItems 000 ~ 117 are immediately accessible only upon entering the Installers Menu.

Their numbers, descriptions, ranges, factory default settings, and a place for listing any changes made on-site are given below a

Installer Menu Items 000 through 117

Menu Function Value Default Brief Description of Function and CommentsItem Range Value000 INSTALLER SEQ 000~3 000 Leave default set 0.

001 POWER MANAGE 000~7 000 Sets number of hours of no activity before auto shut off.

002 AC ON 000~1 000 Set to 1 to enable auto turn on at power up.

003 BAND/AFC 000~3 001 Selects Tuning band.

004 STRT CHANNEL 000~127, 255 255 Channel at turn-on (Set 255 to return to last channel before pow

005 CHAN LOCK 000~1 000 If set to 1, cannot tune from current channel.

007 STRT VOLUME 000~63, 255 255 Sets Volume level at TV turn-on(Set 255 to retain last volume lev

008 MIN VOLUME 000~63 000 Sets minimum allowable volume setting.

009 MAX VOLUME 000~63 63 Sets maximum allowable volume setting.

010 MUTE DISABLE 000~1 000 Set to 1 to disable mute function.011 KEY DEFEAT 000~1 000 Disables menu navigation keys on display panel.

015 SLEEP TIMER 000~1 001 Set to 1 to enable Sleep Timer.

016 EN TIMER 000~1 000 Set to 1 to enable On/Off Timers.

017 ALARM 000~1 001 Set to 1 to enable Alarm.

021 V-CHIP 000~1 001 Set to 1 to enable V-Chip functions.

022 MAX BLK HRS 000~99 012 Sets number of V-Chip(Parental Control) blocking hours.

023 CAPTION LOCK 000~1 000 Set to 1 to retain caption setting at power off.

028 CH. OVERIDE 000~1 001 If set to 0, limits direct access to favorite channels.

029 OLD OCV 000~1 001 Set to 1 to change M.P.I. operation to OCV.

030 ACK MASK 000~1 000 If set to 1, changes M.P.I. for some OCV boxes.

031 POLL RATE 020~169 094 Selects poll rate for M.P.I.032 TIMING PULSE 186~227 207 Sets baud rate for M.P.I.

034 CAMPORT EN 000~1 001 Set to 1 to enable Video 2 input.

035 CAMPPORT EN 000~1 001 Enables plasma panel DVI input port, set to 1 for DTV or 2 for PC

038 YPrPb EN 000~1 001 Set to 1 to enable display panel Component 1 input jacks.

039 REAR AUX EN 000~1 001 Set to 1 to enable display panel Video 1 input jack.

040 AUTO CAMPORT 000~1 001 For CRT-type TVs. Default set to 1 to automatically switch to Ca

046 STRT AUX SRCE 001~7 255 255 Sets the starting AUX source

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082 CHKSUM ERROR 000~1 001 Enforces rigid M.P.I. checksum.

083 HANDSHK TIME 000~5 005 Relaxes M.P.I. timing to be compatible with PC based Windows

084 PERMANENT BLK 000~1 000 Removes block hours setting for Parental Control and make bloc

087 REAR RGB EN. 000~2 002 Enables RGB1 input, set to 1 for DTV, or 2 for PC. Set to 0 to dis

088 EN NOISE MUTE 000~1 001 If set to 1, mutes audio if no signal is present.

090 KEY LOCK 000~1 000 If set to 1, keyboard is locked out, IR is still functional.091 YPrPb2 EN 000~1 001 Set to 1 to enable plasma Component 2 input jacks.

092 RGB2 ENABLE 000~2 002 Enables RGB2 input, Set to 1 for DTV, or 2 for PC. Set to 0 to di

093 RJP AVAILABLE 000~1 000 Set to 1 to enable.

094 SAP MENU EN 000~1 001 Set to 0 to disable feature on Function menu. Set 1 to enable fea

096 DEF. ASP. RATIO 000~134 002 Sets default aspect ratio at power up. See detailed descriptions a

101 IR BLASTER N/A N/A Not applicable.

102 ATSC BAND 000~4 004 Selects ATSC band.

103 ATSC TUNE MODE 000~1 001 Sets ATSC tuning mode. Set to 0 for virtual channel, set to 1 for

104 START MINOR CH 000~255 000 Selects Minor start channel. Set 0 for NTSC. Not 0, sets Minor c

106 ASP RATIO LOCK 000~1 000 Retains set aspect ratio on power cycle. Set to 0 for default ratio

107 BANNER N/A N/A Not applicable.

116 VIDEO MUTE EN 000~1 000 Set to 0 for normal, set to 1 for Blank.

117 FACT DEFAULT 000~1 000 0=Normal. 1=Loads presets of all above settings.

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No. General Item Default Condition1 RS232C Select Leave default set 0.

2 Input mode TV02CH

3 Volume Level 204 Mute Off

No. User OSD Menu Item Default Condition1 Picture Mode Standard Contrast 91

Brightness 80

Sharpness 54

Color 68

Tint 0(Center)

Color Temperature Cool

Screen Format 16:9

Noise Reduction Off

Film Mode Off

2 Sound Mode Standard Treble 0(Center)

Bass 0(Center)

Balance 0

(Digital Output)

Auto Volume Off

Multi-Track Stereo

Internal Speaker On

3 Channel (Antenna) (Only Item display)

Auto Memorizing YesChannel Label Default

Channel List Empty

Fine Tune Auto

Signal Strength (DTV Only)

4 Setup Time Clock Manual

(Manual Clock)

Daylight Saving Yes

Time Zone Eastern

(On Timer) (Only Item display)

(Off Timer) (Only Item display)

Auto Off OffV-Chip Please Enter your PIN. 0000(Default) Changing PIN

On/Off

TVPG Rating

MPAA Rating

Can. English Rating

Can. French Rating

(PC) (Only RGB PC Input)

Menu Language English

Menu Transparency Semi Opaque

Set ID 15 Caption On/Off Off

(Analog Mode)

(Digital Mode)

(Digital Font Option)

4. Shipment Condition : Product & Customer Menu Setup

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No. Service Menu Item Default Condition1 System Reset Confirm

2 Software Version DM-327KA Aug 02 2006 V1.24 SUB V3.2

Display ID : 0(LCD)

Panel Company ID : 0(LG)

Model ID : 22(LG_LC260WX2_SL02)

HW ID : 0

3 Chip I2C Test Memory : OK

FLASH : OK

EEPROM : OK

TUNER : OK

VIDEO ADC : OK

AUDIO DEC : OK

Uart1 Comm. : NOT OKPillow Mode : 0

Uart Mode : 0

4 Aging Test (Enter)

5 White Balance Offset R

Offset G

Offset B

Gain R

Gain G

Gain B

Reset Mode

6 YPbPr : offset/gain Offset YOffset Pb

Offset Pr

Gain Y

Gain Pb

Gain Pr

Reset Mode

7 RGB : offset/gain Offset R

Offset G

Offset B

Gain R

Gain GGain B

Reset Mode

8 Auto Picture Auto Brightness

Auto Contrast

9 Running Time Running Time

Reset Mode

10 System All Reset Confirm

11 Audio Delay DTV

ATV/CVBS/YC

COMP/PC/HDMI

12 AI Control OFF

13 Last Power Save ON

14 Panel Monitoring OFF

15 Panel ID - Display ID Display ID : 0(LCD)

16 Panel Company ID Panel Company ID : 0(LG)

17 Model ID Model ID : 22(LG_LC260WX2_SL02)

18 Reserved

5. Shipment Condition : Service Menu Setup

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NO KEY FUNTION REAMARK

To turn the TV on or off.To turn the TV on automatically if the power is supplied to the TV. (Use the

POWER key to deactivate) : It should be deactivated when delivered.

To activate the mute function.

N/A

N/A

To select size of the main screen. (Normal, Spectacle, Wide or Zoom)

Switch to closed caption broadcasting.

N/A

To select an external input for the TV screen.N/A

N/A

To enter adjustment mode when manufacturing the TV sets.

W/B adjustment. (automatic)

To enter into the adjustment mode.

To select the multiple sound mode. (Mono, Stereo or Foreign language)

To release the adjustment mode.

To easily adjust the screen according to surrounding brightness.

To easily adjust sound according to the program type.

To check component input.

To check the front AV.

To move channel up/down or to select a function displayed on the screen.

To adjust the volume or accurately control a specific function.

To set a specific function or complete setting.

N/A

N/A

N/A

N/A

N/A

To select the functions such as picture, sound, channel, setup, caption.

To set the delivery condition status after manufacturing the TV set.

To halt the main screen in the nomal mode.

N/A

N/A

N/A

N/A

N/A

N/AN/A

To manually select the channel.

SVC REMOCON

POWER

POWER ON

MUTE

P-CHECK

S-CHECK

ARC

CAPTION

TXT

TV/AVTURBO SOUND

TURBO PICTURE

IN-START

ADJ

MPX

EXIT

APC(PSM)

ASC(SSM)

MULTIMIDIA

FRONT-AV

CHVOLENTER

PIP CH-(OP1)

PIP CH+(OP2)

PIP SWAP(OP3)

PIP INPUT(OP4)

EYEMENU

IN-STOP

STILL

TIME

SIZE

MULTI PIP

POSITION

MODE

PIPTILT

0~9

1

2

3

4

5

6

7

8

910

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

2728

29

30

31

32

33

34

35

3637

38

Shortcut keys

Shortcut keys

Shortcut keys

Shortcut keys

Shortcut keys

Shortcut keys

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TROUBLE SHOOTING GUIDES

Check for problemsin Main Board

Main BoardLED ON?

Power Cable(13 PIN)Check / Replace

Front Cable(7 PIN)Check / Replace

SMPSCheck / Replace

PC Serial portCheck the setting

Serial CableCheck / Replace

LVDS CableCheck / Replace

Main BoardReplace

External equipment/Cable Check / Replace

Main BoardReplace

External equipment/Cable Check / Replace

Main BoardReplace

Speaker CableCheck / Replace

Check for problemsin audio

MICOMCheck the operation

Is it communicatingwith the Service Port?

Is the screencolor normal?

Is the color normalwhen PC/HDMI

is selected?

Is the color normal

when External Input/S-Video/Componentis selected?

Is the left/right audiooutput normal?

YES

YESYES YES YES

YES YES

YES YES

YES YES

YES YES

YES YES

YES

YES

YES

YES

YES

YES

NO NO NO

NO NO

NO NO

NO NO

NO NO

NO NO

NO

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1. Check if the SMPS power is connected to the Main board and stand-by power connected, and whether green light is on for LE

If the green light is not on, check the stand-by power(5V).

2. Turn ON the POWER using the remote controller or the front key button.

At this time, check whether the green light is on for LED (D102).

If the green light is not on, measure the next power with DMM.

- Pin no. 3, 4 and 5 of CN101 (D12V)

- Input/output voltage of IC503 (D12V, D6V)

- Input/output voltage of IC710 (D6V, A5V)

3. Check whether the LCD panel is operating normally.

If the display is not working normally, check the LVDS cable and take the following actions.

- Check the input/output voltage of IC501. (D12V, D3.3V)

- Check the input/output voltage of IC704. (D3.3V, D2.5V)- Check the input/output voltage of IC714. (D3.3V, D1.8V)

- Connect the UART Cable to the Service Port and activate the debugger window of the PC.

After connecting the power to the Main board, check whether the booting flow is normally written in the debugger window of

(To enable communications with the PC, always use the UART cable checked for normal operation.)

- If the booting flow is not written at all in the debugger window of the PC, check the power(D3.3V, D2.5V, D1.8V) connected

And then if there is no problem with the power, check the connection pattern condition of the main chip(IC401) and the Flas

and check the cold solder or short circuit of each pin of the flash memory.

- If only 1 line of booting flow is written in the debugger window of the PC and nothing after that, check the power(D3.3V, D2.

to the main chip(IC401).

And if there is no problem with the power, check the cold solder or short circuit of the array resistance(RA403-RA416) conneand DDR memory(IC402 and IC404).

Check the cold solder or short circuit of each pin of the DDR memory.

- When the booting flow is normally written in the debugger window of the PC but rebooting, check the communications lin

(IC705) and main chip(IC401).

4. Check whether the digital broadcasting is normally received. If it is not normally received, check the following.

- Measure the power of no. 3 pin of TUNER(IC105). (TU5V)

- Measure the power of no. 12 pin of TUNER(IC105). (TU3.3V)

- Measure the power of no. 15 pin of TUNER(IC105). (TU1.8V)

- Check the cold solder and short circuit etc. of the serial resistance(RA101, RA102) and other resistances(R114~R116) of th

- Check the communications line(SCL0, SDA0).

5. If the digital broadcasting is normally received but the analog broadcasting is not received normally, check the no.16 pin of IC7

(CVB_5V) For a more detail review, check the signal wave form of Q106, Q101, Q104 etc. with the oscilloscope.

6. Check if the external input of AV1, 2, 3, S-Video etc. If the video does not show well, check whether there is any problem with

video switch.

If a specific external input does not work, check the external input device and check whether there is any problem with the cab

If not identified simply, check for problems following the signal of Video/audio signal flow chart.

7. Check the external input of Component1 and 2.

If the video of the Component does not work at all, check if there is any problem in IC202, the component video switch and IC

If a specific external input does not work, check the external input device and check whether there is any problem with the cabIf not identified simply, check for problems following the signal of Video/audio signal flow chart.

8. Check the PC input and HDMI(DVI) input.

If the PC video does not work, check whether there is any problem with the connection cable.

If the HDMI video does not work or only the video works without any audio, rewrite the EDID data.

9. Check if the left/right side of the audio working normally.

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1. No Screen(1)

Symptom

Front LED is on as green color, but no picture.

Check Flow

TROUBLE SHOOTING

Check LVDS Cable? Is the LVDS cable connected well? Reset

Replace LVDS Cable

Check Power On signal? Is the Power On Signal correct? Check Key P

Check Power Supply

Is LCD Voltage +24V/+12V

normal?Check Power Supply

Video Normal on Analog RF? Check TUNER

Video normal on Video3? Check HC4051

Video normal on DIGITAL RF? Check TUNER

YES

YES

YES

YES

YES

YES

YES

YES

NO

NO NO

NO

NO

NO

NO

NO

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2. No Screen(2)

Symptom

Front LED is blinking as green color, and no picture.

Check Flow

Check LVDS Cable? Is the LVDS cable connected well? Reset

Replace LVDS Cable

Is LED, D102 lighted?

Check the Main Board

Check Key Pad/IR Input? Replace Key P

Check Power Supply

YES

YESYES

YES

NO

NO NO

NO

3. No Power

Symptom

Front LED is OFF, and no picture.

Check Flow

Power cord connected? Plug in Power cord.

Replace Fuse(T5.0A H 250V)

Is the Power Board connected toConnect cable

YES

YES

NO

Is Fuse(F101) on Power Board good?NO

NO

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4. No Sound

Symptom

Front LED is ON as green color, but no sound.

Check Flow

Check Speaker Cable? Is the SPK cable connected well? Reset

Replace Speaker Cable

Audio Voltage +12V normal?

Audio normal on HDMI?

Check Power Supply

Audio normal on DIGITAL RF?

Check EDID EEPROM

Audio normal on Analog RF? Check MSP3425

Audio normal on Video3? Check TEA6422D

Audio normal on DIGITAL RF? Check TUNER

YES

YESYES

YES

YES

YES

YES

YES

YES

NO

NO

NOChe

NO

NO

NO

NO

NO

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BLOCK DIAGRAM

MPINETWORK

CATVNETWORK

VIDEO IN

Auto camport

RX/TXAudio R/L

FRAM

24MHzRX/TX

RGB LVDS Out

SPDIF

Caption

Optical

IR/Key

8MHz

24.576MHz

24Bit

MPEG2 TS

CVBS

Y/C

IR IN

26" (136

Flash EEPROM

Service Port

RS232 PortSwitch

C-BOXUpdate Key

InternalSpeaker

SpeakerSwitch

AUX CONTR

MPICARD

+5VREGULATOR

MPU(MC9S12W128CFU)

DATA

SELECTOR

DDRK4H561638

IR-LEDDRIVER

RS232C

DRIVER

7.3728 MHz

ISOLATEDSERIAL DATAINTERFACE

ISOLATEDOUTPUT TRANSFORMER

8 OHM/2W

ISOLATEDDC/DC CONVERTER

12VDC OUT

ST12V

ST12V

REMOTECONTROL

I C2

I C2

I C2

SPEAKER OUT

SPEAKER

SELECTOR

SPEAKER OUT

IC708

STA323W

IC401ZR39660

IC708

STA323W

IC401ZR39660

IC705

M37151

IC705

M37151

IC302

RTD2023B

IC201

MST9883

IC302

RTD2023B

IC201MST9883

IC707

BA7657

IC707

BA7657

Decryption

Block

Decryption

Block

IC105

TDVS-H062P

IC105

TDVS-H062P

IC602IC602

HDMI

RGB

Componentx 2

ANTENNACABLE

CVBS x 2

CVBS

SIF

S-Video

18.432MHz

IC70674VHC4051

IC70674VHC4051

Model : 26LH1DC1-UB

Copyr

Onlyf

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right2007LG

Electronics.Inc.Allrightreserved.

-28-

LGEInte

rnalUseOnly

fortrainingand

servicepurposes

AC IN100~240V

LINEFILTER

MAIN

CONTROL

(IC802)

PSU

PWR ON/OFF

(Q803)

STAND-BY

CONTROL(IC900)

OPTOCOUPLER

(IC807)

STAND-BYTRANS

(T901)

MAIN

TRANS

(T801)

RECT

(SCHO

R

(S

5V

FEED

BACK(IC804)

FEED

BACK(IC902)

BRIDGE

(BD801)

PFC

(IC801)

DC +400V

POWER SUPPLY

Copyri

Onlyfo

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ght2007LGElectronics.Inc.Allright

reserved.

-29-

LGEInte

rnalUseOnly

ortrainingandservicepurposes

55mA

3.3V

0.06A

0.36A

0.19A

0.2A

0.24A

0.35A

0.6 ~ 1.8A

0.5A

165mA

0.18A

0.3A

1.2A

0.1A

0.1A0.1A

2.8 ~ 3.65A

LCD_12

A9

A5

A3.3

TU3.3

TU1.8

1.8

D3.3

D2.5

A1.8

AMP_12

TU5

D6V

5

LCD_24

KA7809

DC/DC

FDS4435

12V

SMPS

12VA

ST5V

ST12V

24V

SC1566

AME8815

AME1117

78M05

DC/DC AME8807

AME1117

AME8802

KA7805

KA7805

Power Tree

SupraHD-660 IC Block Diagram

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p g

Note : The SupraHD-680 has an integrated CableCard controller, the SupraHD-660 does not.

SupraHD-660/680 Overview

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1. SupraHD ZR396x0 Family

The ZR396xx family consists of :

SupraHD-680 IC (ZR39680) - Digital TVs for the ATSC/DVB/OpenCable Market

SupraHD-660 IC (ZR39660) - Digital TVs for the ATSC Market

SupraHD-640 IC (ZR39640) - Digital ATSC upgrade for Analog TVs

2. SupraHD-660/680 IC Description

The SupraHD-660/680 ICs are members of the SupraHD family of DTV controllers developed by Zoran.

These devices are intended to be used in ATSC-compliant television implementations.

They add the functionality required to support OpenCable implementations.

These devices include all of the functionality required to support the television implementations shown in th

block diagrams.

Figure 3 shows a typical system implementation using the SupraHD-660/680. This system can be designed an

very low cost manner

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very low-cost manner.

3. I/O Options

Figure 4 shows the four major I/O options available :

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Figure 4 shows the four major I/O options available :

video input and output

audio input and output

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VIDEO AND AUDIO SIGNAL FLOW CHART

1. Digital RF(ATSC, QAM) Video signal flow chart

The digital RF signal(ATSC/QAM) received in the input terminal of the tuner is converted to the base

the tuner(IC105) to send out 8 bit transport stream.

This signal is transferred to the FPGA chip of IC901. FPGA chip decrypts the TS data so that it can b

the DTV decoder in the next terminal.

The TS data decrypted by IC901 is decoded by the video decoder of DTV controller of IC401 and co

LVDS signal.

The LVDS signal is transferred to the LCD panel through the P503 connector to be displayed on the L

*Tuner(ATSC/QAM) Video signal flowchart

RF Signal Input(ATSC/QAM)

LCD Panel

UnscrambledTS Data

TS Data

LVDS Signal

IC105TUNER

IC901ALTERA FPGA

IC401DTV Controller

P503LVDS Connector

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2. Digital RF(ATSC, QAM) Audio signal flow chart

*Tuner(ATSC/QAM) Audio signal flowchart

RF Signal Input(ATSC/QAM)

I2S

TS Data

UnscrambledTS Data

IEC958IC401DTV Controller

IC901ALTERA FPGA

Speaker

Stereo(L/R)

IC708Digital Audio Amp.

P501SPDIF Output

Connector

P706, P707Audio Output

Connector

IC105TUNER

The digital RF signal(ATSC/QAM) received in the input terminal of the tuner is converted to the base the tuner(IC105) to send out 8 bit transport stream.

This signal includes both the video and audio signal. The audio received by the DTV controller thro

decoded for Dolby AC3 in the audio decoder and the PCM data is transferred in I2S format.

This signal is converted to stereo signal(L/R) from the digital audio amp(IC708) and then sent to the in

through audio output connector(P706, P707).

Also for the digital audio data in IC401, the PCM or AC3 compressed data by user setting is sent

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3. Analog RF(NTSC) Video signal flow chart

*Tuner(NTSC) Video signal flowchart

RF Signal Input(NTSC)

LCD Panel

CVBS

CVBSfor Caption

I2C Comm.

TU_CVBS

LVDS Signal

IC105TUNER

IC706Analog MUX

(Video switch)

IC401DTV Controller

IC107SD Video Filter

IC705Micro Processor

P503LVDS Connector

The analog RF signal(NTSC) received in the input terminal of the tuner is converted to the base ban

tuner(IC105) to send out the composite signal.

This CVBS signal is received by IC706 which is the analog video switch. The analog video switch

CVBS signal sent from the tuner and the external signal, AV1, AV2, AV3, S-Video caption and Comp

signal and sends out one of the signals.

The external input mode selected by the TV/AV button on the remote controller is the video signal selected f

The output signal is the decoded in the DTV controller of IC401 and converted to LVDS signal to be se

LCD panel through the LVDS connector of P503.Also the output signal from the analog video switch of IC706 is used as the caption signal.

This signal is amplified 2 times to send to the microprocessor(IC705), and IC705 arranges the caption

the caption information to the DTV controller through the I2C communications line.

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4. Analog RF(NTSC) Audio signal flow chart

*Tuner(NTSC) Audio signal flowchart

RF Signal Input(NTSC)

I2S

I2S

SIF


IC602Audio Processor

IC603OP Amp.

Speaker

Stereo(L/R)


P501SPDIF Output

Connector


Connector

IC105TUNER

The audio signal of the analog RF signal(NTSC) received in the input terminal of the tuner(IC105) is ssound IF signal by the tuner.

The SIF signal goes through Automatic Volume Correction(AVC) in the audio processor an

OP Amp(IC603).

This signal is amplified to be sent to the audio processor again.

The audio processor converts the stereo signal into I 2S format to send to DTV controller and PCM da

in I2S format through audio decoding process.

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5. AV1, AV2, AV3 Video signal flow chart

*Composite(AV1, 2, 3) Video signal flowchart

AV1, AV3 Input

AV2 Input

LCD Panel

CVBS

CVBSfor Caption

I2C Comm.

CVBS

LVDS Signal

P703RCA Jack

CN105Wafer

IC706Analog MUX

(Video switch)

IC401DTV Controller



P503LVDS Connector

External input AV1 and AV3 are received through the RCA jack of P703, and AV2 is received thro

wafer of CN105.

These signals all come to the analog video switch(IC706) and only 1 signal is selected. In other words

as the analog RF signal.

The one signal that has been selected for output is decoded in the DTV controller and converted to L

be sent to the LCD panel through the LVSD connector(P503).Also the output signal from the analog video switch is used for caption.

The signal received from IC107 is filtered and amplified 2 times to be received by the microprocessor.

The microprocessor analyzes(caption slicing) this signal to send the caption information.

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6. AV1, AV2, AV3 Audio signal flow chart

*Composite(AV1, 2, 3(S-Video)) Audio signal flowchart

AV1, AV3(S-Video) Input

AV2 Input

I2S

I2S



IC601Audio Switch

Speaker

Stereo(L/R)


P501SPDIF Output

Connector


Connector

CN105Wafer

P703RCA Jack

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7. S-Video Video signal flow chart

*S-Video signal flowchart

S-Video Input

LCD Panel

S-Video

CVBSfor Caption

I2C Comm.

LVDS Signal

IC706Analog MUX

(Video switch)

IC401DTV Controller



P503LVDS Connector

P101S-Video Jack

S-Video signal is received through P101 jack.

Y signal and C signal are separated in this signal and is received directly by DTV controller(IC401) an

IC401 to convert to LVDS signal.

Then it is sent to the LCD panel through P503.

And the caption signal is send to IC401 through the video filter (IC107) and microprocessor(IC705) via

switch(IC706).

The audio signal of S-Video is used as the audio signal of AV3.

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8. Component1, Component2 Video signal flow chart

*Component1, 2 Video signal flowchart

Component1Component2

Input

Y/Cb/Cr24 bit Digital signal

Y/Pb/Pr

Yfor Caption IC706

Analog MUX(Video switch)

I2C Comm. IC705Micro Processor

IC201AD Converter

IC202Video switch

LCD Panel

LVDS Signal

IC401DTV Controller


P503LVDS Connector

P201RCA Jack

One of the component1 and 2 video signals received in P201 is selected by the video switch(IC202

Analog to Digital converter(IC201).

The analog signal received in IC201 is converted to the digital signal and sent as output in 24 bit.

The digital signal of 24bit is received in DTV controller(IC401) and decoded to convert to LVDS sign

the LCD panel through LVDS connector.

Also because the caption information in the component signal received in IC202 is in Y signal, the Y s

the analog video switch of IC706 to be sent to IC401 through IC107 and IC705.

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9. Component1, Component2 Audio signal flow chart

*Component1, 2 Audio signal flowchart

Component1Component2

Input

I2S

I2S



IC601Audio Switch

P601RCA Jack

Speaker

Stereo(L/R)


P501SPDIF Output

Connector


Connector

The left/right audio signal of component1 and component2 is received in P601 and sent to the audio sw

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10. PC Video signal flow chart

*PC RGB signal flowchart

RGB Signal Input

LCD Panel

I2C Comm.

LVDS Signal

24bitDigital signal

R/G/B

IC303NVRAM

(PC EDID)

IC401DTV Controller

IC302Scaler

P503LVDS Connector

P301D-sub 15 Connector

The RGB signal outputted from the PC is received through the D-sub 15 pin connector of P301.The PC reads the EDID information of IC303 through I2C line and outputs the best resolution supported by t

When the EDID information is not recorded in NVRAM(IC303) or when the EDID information cannot

communications line issue, basic resolution provided in PC is sent out as output.

The analog RGB signal entered through IC302 is converted to AD through the scaler(IC302) and se

24 bit digital signal.

(The 24 bit signal is composed is wired OR with the 24 bit component outputted by the IC201(AD conv

The 24 bit signal received in DTV controller(IC401) is decoded and converted to LVDS to be sent

through P503.

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11. PC(DVI) Audio signal flow chart

*PC(DVI) Audio signal flowchart

PC(DVI)Input

I2S

I2S



IC601Audio Switch

P602Phone Jack

Speaker

Stereo(L/R)


P501SPDIF Output

Connector


Connector

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12. HDMI(DVI) signal flow chart

*HDMI(DVI) Video signal flowchart

HDMI(DVI)Signal Input

LCD Panel

TMDS Signal

I2C Comm.

LVDS Signal

P505HDMI Connector

IC504NVRAM

(HDMI EDID)

IC401DTV Controller

P503LVDS Connector

HDMI transmitter reads the HDCP certification and EDID information when connected to the HDMI connecto

At this time, if the HDCP certification fails or if the EDID information cannot be read, the HDMI transm

send out the video and audio signal.

When HDCP certification is successfully done, the signal sent by the transmitter that could not read the

EDID information is decoded by the DTV controller(IC401) and converted to LVDS signal to be sent toLCD panel through the LVDS connector.

The DVI transmitter only outputs the video signal after HDCP certification and reading the EDID inform

(For DVI transmitter, the PC generally outputs the video signal after HDCP certification and reading

the EDID information, but if the Set Top Box is the DVI transmitter, sometimes it outputs only the vide

unconditionally in set resolution.)

The signal received through IC401 is shown in the display through the same process as above.

Copyright2

Onlyfortrain

WIRING DIAGRA

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2007LGE

lectronics.Inc.Allrightreserved.

-46-

LGEInter

nalUseOnly

ningands

ervicepurposes

[26LH1DC1-UB]

Copyright2

Onlyfortrain

EXPLODED VIEW

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2007LGE

lectronics.Inc.Allrightreserved.

-47-

LGEInter

nalUseOnly

ningands

ervicepurposes

MODEL NO. : 26LH1DC1-UB

1

11

12

13

14

15

2

3

4

5

6

7

8

EXPLODED VIEW PARTS LIST

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NO. PART NO. PART NAME DESCRIPTION1

2

3

4

5

6

78

9

10

11

12

13

14

15

16

17

18

19

20

ETC

Acce

ssory

ABJ36972701

EAJ40492101

ADV36972501

EBU39110201

EBU39136401

MAZ42732101

MGJ42733001EBU39136601

MGJ42732301

ACQ36972801

MBG42732401

EBU39111101

MES42732701

EBU39111301

EBU39138801

EBU38606701

EBU39138901

EBU39115101

EBU39115901

MAZ42732601

EBU39117501

EBU39139001

EBU39139101

EBU38690001

MAY42732801

MFZ42732901

Cover_Front (Silver)+Membrane_Key

Chassis_Main+Gasket_EMI+CR Sponge

Cover_Rear AV+Gasket_EMIDigital Pillow Speaker Board+Harness

Cover_Back + Plate_Rear AV + Label_Serial +

Label_ID/Spec

Speaker+Harness

Speaker+Harness

Chassis_PCB Supporter + Chassis_PCB Guid

Plate_MPI Card + Nut_Stamped_Locking + MP

00) + MPI Connector Board(6367T_MCN)

Main Board+Gap Pad+Gasket_EMI

Service Board+Gasket_EMI+Harness

Cover_Side Jack+Plate_Side AV

Cover_Front (Silver) Assembly

26" LCD Panel, LC260WX2-SLB2

Chassis_Main Assembly

Power Supply Assembly, Built In, Free Volt

PPV/DPS Main Board

Chassis_Supporter Wall

Cover_Rear AV AssemblyDigital Pillow Speaker Board Assembly

Chassis_Main Shield

Cover_Back Assembly

Cover_Key Knob

Key Board

Indicator_Led Lens

IR Board

Speaker_2p, 26_R_Assembly

Speaker_3p, 26_L_Assembly

MPI Card Assembly

Main Board Assembly

Service Board Assembly

Auxiliary A/V In Board

Cover_Side Jack

30PX30P(300mm) LVDS Cable

Harness Assembly

Installa tion&Setup Guide

Hospital Power Cord_SJP_3P_1800mm

Box

Packing

REPLACEMENT PARTS LIST

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December, 2007P/NO : 3350GDKM0020A

Documents

LG 26LH1DC1-UB.pdf