lg 26lh1dc1-ub.pdf
TRANSCRIPT
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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
Item Min Typ Max Unit Rema
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
Item Min Typ Max Unit Rema
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
IEC958IC401DTV Controller
IC602Audio Processor
IC603OP Amp.
Speaker
Stereo(L/R)
IC708Digital Audio Amp.
P501SPDIF Output
Connector
P706, P707Audio Output
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
IC107SD Video Filter
IC705Micro Processor
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
IEC958IC401DTV Controller
IC602Audio Processor
IC601Audio Switch
Speaker
Stereo(L/R)
IC708Digital Audio Amp.
P501SPDIF Output
Connector
P706, P707Audio Output
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
IC107SD Video Filter
IC705Micro Processor
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
IC701SD Video Filter
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
IEC958IC401DTV Controller
IC602Audio Processor
IC601Audio Switch
P601RCA Jack
Speaker
Stereo(L/R)
IC708Digital Audio Amp.
P501SPDIF Output
Connector
P706, P707Audio Output
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
IEC958IC401DTV Controller
IC602Audio Processor
IC601Audio Switch
P602Phone Jack
Speaker
Stereo(L/R)
IC708Digital Audio Amp.
P501SPDIF Output
Connector
P706, P707Audio Output
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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Copyright2007 LG Electronics. Inc. All right reserved.Only for training and service purposes
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December, 2007P/NO : 3350GDKM0020A