Download - TV Repair Guide LCD
LCD TelevisionRepair Guide Handbook
Woofer Speaker
Power Board
Main Board
Driver Board
General 1. ‘13 LCD TV layout structure Overview
JUAN CARLOS RODRIGUEZ
1
T con Board
Local Key
IRWiFi
Board RF Board
Power LEDOn?
Y
N Y
N
Check Power cordwas inserted properly
ReplacePowerB/D
Measure voltage for each output of Power B/D
N
Replace Main B/D
Y
- Stand-By: Red light or Turn Off- Power on Condition: Turn Off
OperationOK?
Voltage OK?(3.5V)
Voltage OK?(3.3V)
☞Page 6~7Measure voltage“Power On” linewith Tester
“DC Power on”by pressing Power Keywith Remote controller
CheckFront DisplayLED light Status
☞Page 5
Repair Method by Symptoms 3-1. No Power Check(Flow Chart)
2
N
Y Replace Main B/D
N
Y
Replace Power B/D
N
Replace Power B/D
※
insertedproperly
OK?
Voltage OK?(3.5V)
Voltage OK?(12V,3.5V)
Close☞Page 6~7
-DC Power on: Switch on the TV with local key or remote controller-AC Power on: Switch on the TV with power supply(outlet)
Check ST-BY 3.5VMeasure votage3.5V pin with Tester
<Power Pin Voltage Spec>
Output VoltageVariable range
3.5V(ST-BY) 3.325V~3.675V
12V 11.4~12.6V24V 21.6V~27V
Check the ST-BY(3.5V) and Power on(3.3V)
24 Pin (Power Board ↔ Main Board)
1 Power on(3.3V) 2 24V
3 24V 4 24V
5 GND 6 GND
7 GND 8 GND
9 ST-BY (3.5V) 10 ST-BY (3.5V)
Direct LEDPower Board
<Check Power on (3.3V) and ST-BY(3.5V)> 1. Power Sequence : AC IN→ST-BY3.5V→P-ON→12V,24V→INV ON2. ST-BY3.5V: Power Board → Main Board Micom IC/Power LED /IR Voltage3. 24V: Power Board → Main Board Sound IC /LED Driver Voltage4. 12V: Power Board → Main Board /Module Voltage
3.3V
Repair Method by Symptoms 3-2. No Power Check(check method)
JC
3
9 ST-BY (3.5V) 10 ST-BY (3.5V)
11 ST-BY (3.5V) 12 ST-BY (3.5V)
13 GND 14 GND
15 GND 16 GND
17 12V 18 Inverter On/off
19 12V 20 Lamp : A-DimLED : N.C
21 12V 22 PWM Dim #1
23 N.C• Lamp SCANNINGModel: PWM Dim #2
24 Error-out
Edge LEDPower Board
The “LED” refers only to the type of lighting source used to illuminate the LCD pixels in the television1. Direct LED: Direct type term refers to televisions that use a full panel of LEDs to illuminate the pixels.2. Edge LED: Edge LED,means the LEDs that illuminate the pixels are located only on the edges of the set.
3.5V
JCR
`13 Model LA Series 24 Pin (Power Board ↔ Main Board)
1 Power on(3.3V) 2 InverterOn/off(3.3V)
3 ST-BY(3.5V) 4 PWM Dim #1
5 ST-BY(3.5V) 6 PWM Dim #2
7 GND 8 GND
9 24V 10 24V
11 GND 12 GND
13 12V 14 12V
15 12V 16 24V
17 GND 18 GND
<Check Power on (3.3V) and ST-BY(3.5V)>
Direct LEDPower Board
3.3V
Repair Method by Symptoms 3-2. No Power Check(Check method)
4
17 GND 18 GND
19 GND 20 GND
21 GND 22 L/DIMO_VS
23 L/DIM0_MOSI 24 L/DIM0_SCLK18 Pin (Power Board ↔ Main Board)
1 Power on(3.3V) 2 Inverter On/off
3 ST-BY(3.5V) 4 PWM Dim #1
5 ST-BY(3.5V) 6 PWM Dim #2
7 GND 8 GND
9 24V 10 24V
11 GND 12 GND
13 12V 14 12V
15 12V 16 24V
17 GND 18 GND
Edge LEDPower Board
3.5V
JCR
Pin No. Items Description of service and functions
24 ERROR The Inverter or HV signals whether the Lamp Turn-on functions normally
23 NC Null terminals
22 P-DIM The CPU automatically adjusts the brightness, based on the wave pattern ofelements communicated (for each picture mode)
20 A-DIM The CPU customizes the brightness of Lamp as to each different brightness ofpicture (a serial current wave)
Repair Method by Symptoms 3-3. No Power Check(Power Pin Description)
5
The CPU customizes the brightness of Lamp as to each different brightness ofpicture (a serial current wave)
18 INV ON/OFF Signals for Inverter, controlled by MICOM
17,19,21 12V Power Supply to Main Board/Module
15,16 GND
13,14 GND
11,12 3.5V ST-BY
9,10 3.5V ST-BY
7,8 GND
5,6 GND
2,3,4 24V Sound IC B+ Voltage
1 Power On A Voltage required to turn Multi Voltages ON, Input by MICOM(Voltage: 3.3V)
Y
N
Y
N
Y
N
Replace module
Repair PowerBoard or parts
Check Power Board 24v output
First of all, Check whether all of cables between board are inserted properly or not.(Main B/D↔ Power B/D, LVDS Cable, Speaker Cable, IR B/D Cable,,,)
Case1. No Picture with audio working conditionCase2. No Picture with audio not working condition
☞Page 10~12Sound
Workingproperly
Back light“On”
CheckVoltage
12V, 3.5V
Check Back Lightwhether “On ”or offwith naked eye
Check PowerBoard 12V, 3.5Vline
No Picture
Case 1
No Picture with Soundnot working conditon
Repair Method by Symptoms 4-1. No Picture Check(Flow Chart)
6
Y Replace Inverteror module
N
Repair PowerBoard or parts
End
Y
Replace PowerBoard
N End
☞Page 10~12
VoltageOK?
Check Power Board3.5V,12V,24 line
Check and replaceMAIN B/D
VoltageOK?
Case 2
No Picture with Soundnot working conditon
<Power Pin Voltage Spec>
Output VoltageVariable range
3.5V(ST-BY) 3.325V~3.675V
12V 11.4~12.6V24V 21.6V~27V
24 Pin (Power Board ↔ Main Board) - 공통
1 Power on(3.3V) 2 24V
3 24V 4 24V
5 GND 6 GND
7 GND 8 GND
9 ST-BY(3.5V) 10 ST-BY(3.5V)
11 ST-BY(3.5V) 12 ST-BY(3.5V)
Screen (LK, LW)
ERRORP-DIMA-DIMINV-ONGNDGND3.5V3.5VGNDGND24V24V
NC12V12V12VGNDGND3.5V3.5VGNDGND24VON/OFF
Check the DC 24V, 12V, 3.5V
Repair Method by Symptoms 4-2. No Picture Check(Check Power Pin)
JUAN CARLOS RODRIGUEZ
7
<LK Series>
<LWSeries>
13 GND 14 GND
15 GND 16 GND
17 12V 18 Inverter On/off
19 12V 20 A-Dim
21 12V 22 PWM Dim
23 N.C(only Lamp
SCANNING Model: PWM Dim #2)
24 Error-out
ERRORP-DIMA-DIMINV-ONGNDGND3.5V3.5VGNDGND24V24V
NC12V12V12VGNDGND3.5V3.5VGNDGND24VON/OFF
24 Pin (Power Board ↔ Main Board) - 공통
1 Power on(3.3V) 2 24V
3 24V 4 24V
5 GND 6 GND
7 GND 8 GND
9 ST-BY(3.5V) 10 ST-BY(3.5V)
11 ST-BY(3.5V) 12 ST-BY(3.5V)
Screen (LM)<Check power On(3.3V) and DC 24V, 12V, 3.5V>Check the DC 24V, 12V, 3.5VDirect LED
Power Board
24V
Repair Method by Symptoms 4-2. No Picture Check(Check Power Pin)
8
11 ST-BY(3.5V) 12 ST-BY(3.5V)
13 GND 14 GND
15 GND 16 N.C(Only LPB : V-sync)
17 12V 18 Inverter On/off
19 12V 20 N.C(LPB, Lamp : A-dim)
21 12V 22 PWM Dim #1
23 N.C(only Lamp
SCANNING Model: PWM Dim #2)
24 Error-out
3.5V
24V
12V
JCR
<Check power input voltage and DC 24V, 12V, 3.5V>
24 Pin (Power Board ↔ Main Board)
1 Power on 2 Inverter On/off
3 3.5V 4 PWM Dim #1
5 3.5V 6 PWM Dim #2
18 Pin (Power Board ↔ Main Board)
1 Power on 2 Inverter On/off
3 3.5V 4 PWM Dim #1
5 3.5V 6 PWM Dim #2
Screen (LA)
Check the DC 24V, 12V, 3.5V
Direct LEDPower Board
Repair Method by Symptoms 4-2. No Picture Check(Check Power Pin)
JUAN CARLOS RODRIGUEZ
9
5 3.5V 6 PWM Dim #2
7 GND 8 GND
9 24V 10 24V
11 GND 12 GND
13 12V 14 12V
15 12V 16 24V
17 GND 18 GND
19 GND 20 GND
21 GND 22 L/DIMO_VS
23 L/DIM0_MOSI 24 L/DIM0_SCLK
5 3.5V 6 PWM Dim #2
7 GND 8 GND
9 24V 10 24V
11 GND 12 GND
13 12V 14 12V
15 12V 16 24V
17 GND 18 GND
Direct LEDPower Board P203
1~5 12V
6~10 GND
P202
1~5 24V
6~10 GND
Check the DC 24V and Inverter on
Repair Method by Symptoms 4-3. No Picture Check(Check LED Driver 24V )
10
Edge LEDPower Board
11 Error
12 Inverter ON( 3.3V)
13 A-dim
14 P-dim
No sound N
Y
Cancel OFF
Check audio B+ 24Vof Power Board
Y
N
Replace Power Board
<No Sound with Picture working condition>
SpeakerOff
CheckVoltage
(24V)
☞Page 15~16CheckUser menu speaker off
Repair Method by Symptoms 5-1. No Sount Check(Flow Chart)
11
Cancel OFF Replace Power Board
N
Y
Replace Speaker
EndCheck SpeakerCableDisconnection
Replace main BoardDisconnection
‘13 LA Series
24 Pin (Power Board ↔ Main Board)1 Power on 2 INV ON3 3.5V 4 PDIM#15 3.5V 6 PDIM#27 GND 8 GND9 24V 10 24V11 GND 12 GND13 12V 14 12V15 12V 16 24V17 GND 18 GND
①
②
<No Sound/Picture OK >
Power BoardMain Board
Repair Method by Symptoms 5-2. No Sount Check(Troubleshooting)
12
Checking method(direction) when there is no sound
① Check the contact condition of or 24V connector of Main Board
② Measure the 24V input voltage supplied from Power Board(If there is no input voltage, check the connector)
JUAN CARLOS RODRIGUEZ
ScreenOK?
N
YCheck externaldeviceconnectioncondition
Y
N
Check andreplace LinkCable
Good?
Y
NScreenOK? Replace Main B/D
Vertical/Horizontal bar, residual image, light spot
Y
N
ReplaceModule
ScreenOK?
☞ Page 31
6. Picture Error
Check color condition by input-External Input-Component-RGB-HDMI/DVI
Board Check method
Repair Method by Symptoms 6. Picture Error Check(Flow Chart)
13
Replacemodule
EndRequest repairfor externaldevice
☞Page 62
Y
End
Check Test pattern
Category Items Failure Cause Conditions
MainB/D
ICPicture
distortionFailure in I2C communication betweenMICOM and Main IC
MainB/D
ICPicture
distortionPicture occasionally cracked by thesoldering on Main IC
Repair Method by Symptoms 7-1. Sysmptoms List(Main Board)
14
MainB/D
Picturedistortion
MainB/D
ICPicture
distortionPicture cracking due to poor soldering onMain IC
MainB/D
ICPicture
distortionR-color noise caused by poor solderingon Main IC
Category Items Failure Cause Conditions
MainB/D
ICPicture
distortionMosaics generated from poor insideMain IC
MainB/D
ICPicture
distortionPicture cracking from poor service of anelement inside Main IC
Repair Method by Symptoms 7-1. Sysmptoms List(Main Board)
15
MainB/D
Picturedistortion
MainB/D
IC Static screen Screen frozen from a poor feature in MainIC
MainB/D
IC No sound No sound due to a poor feature in Audio IC
Category Items Failure Cause Conditions
SpeakerCable
Poorprocessing
Noise insound
A “woong ~” sound from the right Speakercaused by a speared damage in SoundCable
SpeakerSystem
Poorprocessing
Noise insound
A noise and vibration produced from influxof alien materials into Speaker System
Repair Method by Symptoms 7-1. Sysmptoms List(Main Board)
16
SpeakerSystem
Poorprocessing
Noise insound
A noise and vibration produced from influxof alien materials into Speaker System
SpeakerSystem
Poorprocessing
Noise insound
A noise and vibration produced from influxof alien materials into Speaker System
FFCCable
Poor contactPicture
crackingPicture cracking around the contour frompoor contact between FFC Cable PINs
Category Items Failure Cause Conditions
Module Panel Vertical barsVertical bars caused by a irregular featurein the Panel
Module Panel Vertical barsVertical bars caused by a irregular featurein the Panel
Repair Method by Symptoms 7-2. Sysmptoms List(Module)
17
Module Panel Vertical barsVertical bars caused by a irregular featurein the Panel
Module Panel Dark screen Screen getting partially dark by a defectinside the Panel
Category Items Failure Cause Conditions
Module Driver B/D Dark screenScreen getting partially dark by a failure inMODULE DRIVER B/D
Module Panel Vertical barsVertical bars caused by a poor feature inthe Panel
Repair Method by Symptoms 7-2. Sysmptoms List(Module)
18
Module Driver B/D1/3 part of
Screen gettingdark
1/3 part of Screen (left/center/right) gettingdark due to a defective feature in DriverB/D
Module Panel Alien materialsInflux of alien materials into the Moduleduring the assembling process
Category Items Failure Cause Conditions
ModuleConnector
s1/2 of Picture
crackingPicture cracking from contamination byforeign materials inside a connector
Module Panel Dark screen Screen getting dark from a defect in LEDunit inside the Panel
Repair Method by Symptoms 7-2. Sysmptoms List(Module)
19
Module Panel Vertical barsVertical bars caused by a defective featurein the Panel
Module Panel Vertical barsVertical bars caused by a defective featurein the Panel
Category Items Failure Cause Conditions
Module PanelScreen partially
too brightScreen partially getting too bright from afailure in LED inside the Panel
Module PanelAlien materials
insideMoisture inflow into the product
Repair Method by Symptoms 7-2. Sysmptoms List(Module)
20
Module Panel Film separation Film separation from defective processing
Processing failure
Processingfailure Shipment
setting failureWith the Shipment setting inapplicable,Shipment is made only in a control mode
Category Items Failure Cause Conditions
T-ConB/D
EOSVertical bars
evenly spacedDamage in Electrical Over Stress
T-ConB/D
EOSVertical bars
evenly spacedDamage in Electrical Over Stress
Repair Method by Symptoms 7-2. Sysmptoms List(Module)
21
T-ConB/D
Vertical barsevenly spaced
T-ConB/D
EOSPicture
distortionPoor features in T-CON
T-Con
B/DIC
Picture
distortion
Picture cracking from a poor feature in
T-CON IC
Category Items Failure Cause Conditions
T-ConB/D
ICPicture
distortion
Picture cracking from a poor feature in 3DFormatter IC
T-ConB/D
ICPicture
distortion
Picture cracking from contaminationaround 3D Formatter IC
Repair Method by Symptoms 7-2. Sysmptoms List(Module)
22
T-ConB/D
ICPicture
distortion
Picture cracking from an error in BootData
T-ConB/D
ICPicture
distortion
Picture cracking from an error in BootData
Category Items Failure Cause Conditions
T-Con
B/DIC
Picture
distortion
Picture cracking due to desquamation of
FRC IC
T-Con
B/DIC
Picture
distortion
Picture cracking due to desquamation of
FRC IC
Repair Method by Symptoms 7-2. Sysmptoms List(Module)
23
T-Con
B/D
Picture
distortion
Picture cracking due to desquamation of
FRC IC
Category Items Failure Cause Conditions
LVDSCable
Poorcontact
Picturedistortion
Picture cracking along the contour frompoor contact between LVDS Cable PINs
LVDSCable
Poorcontact
Picturedistortion
Picture cracking from poor contactbetween LVDS Cable PINs
Repair Method by Symptoms 7-3. Sysmptoms List(LVDS Cable)
24
LVDSCable
Poorcontact
Picturedistortion
Picture cracking along the contour frompoor contact between LVDS Cable PINs
Category Items Failure Cause Conditions
FFCCable
Poorcontact
Picturedistortion
Picture cracking along the contourcaused by poor contact between FFCCable Pins
Processing failure
Processingfailure
Shipmentsetting failure
With the Shipment setting inapplicable,Shipment is made only in a control mode
Repair Method by Symptoms 7-3. Sysmptoms List(FFC Cable, Cabinet, etc)
25
Cabinet ICM Filter Desquamationof ICM Filter
Some space made Inside from tear-off ofICM Filter caused by a external shock
Cabinet DamageVibration and
noise inSpeaker System
Speakers shaking from some damage inthe Cabinet Speaker Boss
Mosaic Patterns Picture Distortion
Repair Method by Parts 8. Main Board Check (Symptoms)
26
Mosaic Patterns Picture Distortion
Picture Smear
1. Symptoms : Screen color smearing intermittently
2. Cause of failure : Link cable contact fault
<Check Point> <Repiar method>
1. Check RGB pattern with ‘ADJ Key through SVC Remote
2. Link cable by gently tapping the contact area on thesymptoms of hand Checked
3. Link cable disassembly and re-assemble
4. Check whether the screen display is normal.
Repair Method by Parts 8. Main Board Check (One-Point Repair)
JCR
27
Color smearing
1. Check RGB pattern with ‘ADJ Key through SVC Remote
2. Link cable by gently tapping the contact area on thesymptoms of hand Checked
3. Link cable disassembly and re-assemble
4. Check whether the screen display is normal.
1. Symptoms : Auto Power On/Off
2. Cause of failure : Main board failure
<Check Point> <Repiar method>
1.Press Button ‘In-Start Mode’ Key2.Enter ‘Power Off Status’
1.If there are “POWER_OFF_BY_NO_ POLLING” message
2. Replace the main board
3. Check the condition of Screen
*POWER_OFF_BY_NO_POLLING:If there are no communications between micom and Host
CPU for 15second→ Micom will reboot all system
Repair Method by Parts 8. Main Board Check (One-Point Repair)
28
1.If there are “POWER_OFF_BY_NO_ POLLING” message
2. Replace the main board
3. Check the condition of Screen
*POWER_OFF_BY_NO_POLLING:If there are no communications between micom and Host
CPU for 15second→ Micom will reboot all system
P VCC
* P-VCC: A standard voltage to activate the LCDVCC: Usually 3.3V power required to activate Digital ICVDD: A voltage supplied to Source Drive IC for activation of
LCDVGL/VGH: Voltages required to turn TFT Gate on/off
-VGL: TFT Gate on-VGH: TFT Gate off
1.Title: No Display (Only BackLight or multiple vertical bars)
- Sound Normal/CH Volume Control Normally
2. Applied to: LK, LW57, and 65
3. Troubleshooting: As shown below, inspect the P-VCC(12V) B/D inside T-CON
and US1 output voltage.
Upon an abnormal voltage, open and re-check the FFC leading from T-CON to the Module.
Upon recurrence of a same failure, change T-CON or the Module if the voltage is normal.
(Refer to below Normal Voltage)T-Con Board
Repair Method by Parts 9. Module Check(One Point Repair)
JCR
29
Output voltage of US1
PANEL VCC : F1 or C1(12V) VGL : C251 (-6V)VCC : C215 (3.3V)VGH : R271 (28V)VDD : C239 (16V)
A failure condition
VGH
VCC
VGL
VDD
JCRL
JCR
P701 VDD
* P-VCC: A standard voltage to activate the LCDVCC: Usually 3.3V power required to activate Digital ICVDD: A voltage supplied to Source Drive IC for activation of LCDVGL/VGH: Voltages required to turn TFT Gate on/off
-VGL: TFT Gate on-VGH:TFT Gate off
1.Title: No Display (Only BackLight)
- Sound Normal/CH Volume Control Normally
2.Applied to: LW9500, LW9600, andLW9800
3. Troubleshooting:
Check if Back Light is ON and, if it’s ON, re-check T-CON as the following sequence.
Change the Module if the voltage is normal. Change T-CON if voltage abnormal.
T-Con Board T-Con Board
Repair Method by Parts 9. Module Check(One Point Repair) J.CARLOS RODRIGUEZ
30
Input voltage of LVDS Output voltage of IC 401 output
P VCC : P701 48~51 PIN (12V)
P701
P VCCVCC
VDD
VGH VGL
VCC : D403 (3.3 V) VDD : D402 (16V)VGH : D400 (27V) VGL : C450 (-5V)
A failure condition
No picture (Only backlight)
9. Wi-Fi Operating Checking(Flow Chart)Wi-Fi operating error
Check theINSTART menu
Wi-Fi Mac valueis “NG”?
Y
Check & RepairWifi cable
connection
N Check the Wifi waferPin no.1
Y
N ReplaceMain B/D
Close
NormalVoltage
3.3V
☞Page 34
Repair Method by Parts 10-1. Wi-Fi Check(Flow Chart)
31
Change the Wifiassy
Y
Wi-Fi Mac valueis “NG”?
N
PIN USB interface
1 Vcc(3.3V)
2 DM
3 DP
4 GND
5 WOW
6 NC
Pin mapClose
1. Symptoms : Wi-Fi disconnection
2. Cause of failure : Caused by bad Wi-Fi Module
<Check Point> <Repiar method>
1. Check the Wi-Fi Version at INSTART menu- Wi-Fi MAC and IP Address to check an abnormal
Inspection
1. Wi-Fi Module replacement2. Check the wi-fi Version at INSTART menu
- Wi-Fi MAC and IP Address normal checkconnections from main to Wi-Fi module
Repair Method by Parts 10-2. Wi-Fi Check(One Point Repair)
32
1. Wi-Fi Module replacement2. Check the wi-fi Version at INSTART menu
- Wi-Fi MAC and IP Address normal checkconnections from main to Wi-Fi module
10. Camera Operating Checking(Flow Chart)Camera Operating Error
Check theINSTART menu
Camera Ver.is “NG”?
Y
Check & RepairCamera cable
connection
N Check the Camera waferP4200 (pin no.2)
Y
N ReplaceMain B/D
Close
CheckVoltage(3.3V)
Repair Method by Parts 11. Camera Check(Flow Chart/Troubleshooting)
33
Change theCamera assy
Y
Camera Ver.is “NG”?
N Close
Y
N
CheckM-Remote
itself Operation
Y
Check & ReplaceBatterry ofM-Remote
Press the‘wheel’
N Turn off/on theset
Check theINSTART menu
RF Receiver veris “00.00”?
Y
N
Check RF assyconnection N
Close
NormalOperating?
Is it shown ‘ok’message?
Press thewheel
☞Page 50
ReplaceRF assy Cable
Repair Method by Parts 12-1. Magic Remote Check(Flow Chart)
34
N
N
Replace M4
Press the ‘back’and ‘home’ keyat the same time
about 5secY
Down load the Firmware
* INSTART MENU15.RFRemocon Test3. Firmware
download
Y
Check RF assyconnection
Close
CloseNormal
Operating?
Is it shown ‘ok’message?
Y
☞Page 50
Close
Close
ReplaceRF assy Cable
RF Pairing/Un-Pairing Method
Method Description
RF Pairing
1. Method 1- If un-paired, just press "OK"button.- If paired, press "OK" button after un-pairing.2. Method 2(Repairing)- Press "BACK"button for 5 sec.
▶When pairing, the remote should make a pairingrequest IR signal to TV.
▶When TV receive the IR signal, it should send “pairing request packed" to the RF receiver.
▶ After pairing success, the remote LED shouldblink for some time and TV sends "pairingsuccess pack" back to TV.
▶When remote try's to un-pair, it doesn't careabout state of receiver(stand alone).
Repair Method by Parts 12-2. Magic Remote Check(Pairing/Un Pairing)
35
▶When pairing, the remote should make a pairingrequest IR signal to TV.
▶When TV receive the IR signal, it should send “pairing request packed" to the RF receiver.
▶ After pairing success, the remote LED shouldblink for some time and TV sends "pairingsuccess pack" back to TV.
▶When remote try's to un-pair, it doesn't careabout state of receiver(stand alone).
RFUn-Pairing
Depending on Magic remotePress "HOME/SMART" button and "BACK"button at the same time for 5sec.R/C LED blinks 3times after a few sec's.Then un-paired. To re-pair Press OK button.
▶When remote try's to un-pair, it doesn't care aboutstate of receiver(stand alone).
▶After un-pairing, all pairing information should beerased.
▶After un-pairing, LED should blink 3times.▶The remote just becomes active only in IR mode
control function.
‘13 models -Back/Smart keys
To Register Magic Remote
Press the Wheel(OK) button on the remote control
Pop-up message will appear on screen
When Registration completes, another pop-up message will appear.
Repair Method by Parts 12-3. Magic Remote Check(Register/Unregister)
36
M4 Remote MR13P Remote
To bring up cursor, simply move remote around.
Maximum communication distance:10m or 32.8ft
Unregister Magic Remote Control
• Press the “Home” and “Back” on the
remote fo 5 seconds
• The Red LED at the top of the Remote will
blink 3time
• To re-register the Remote, follow first
procedure
Y
N
Remote control(R/C) operating error
Check R/C itselfOperation Operating
OK?
Y
Check R/C OperatingWhen turn off light
in room
Check & ReplaceBaterry of R/C
Check & RepairCable connectionConnector solder
OperatingOK?
Check B+ 3.5VOn Main B/D
☞Page 52~55
VoltageOK?
N
Check 3.5v on Power B/DReplace Power B/D or
Replace Main B/D(Power B/D don’t have problem)
Check IROutput signal
NormalSignal?
N
Y
Repair/ReplaceIR B/D
N
ReplaceMain B/D
Y
Close
☞Page 52~55☞Page 52~55
☞Page 10~12
Repair Method by Parts 13. Remote Control Check(Flow Chart)
37
OperatingOK?
Replace R/C
If R/C operate,Explain the customercause is interferencefrom light in room.
Check R/C OperatingWhen turn off light
in room
N
Check 3.5v on Power B/DReplace Power B/D or
Replace Main B/D(Power B/D don’t have problem)
Repair/ReplaceIR B/D
YClose
P41011 GND
2 KEY1
3 KEY2
4 +3.5V_ST
5 GND
6 LOGO/LED_R
7 IR8 GND
②
③
④
①
Main Board
Repair Method by Parts 13-2. Remote Control Check(Troubleshooting)
38
1.2. Check IR cable condition between IR & Main board.3. Check the st-by 3.5V on the pin no.44. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog Tester
needle moves slowly, and defective when it does not move at all.
①
P48001 3.3V
2 GND
3 RX
4 TX
5 RESET
6 DC
7 DD8 GND
①
③
<LM Series>
Main Board
Repair Method by Parts 13-2. Remote Control Check(Troubleshooting)
39
Checking order
1, 2. Check Motion cable condition between Motion assy & Main board.3. Check the 3.3V on the pin no. 1.
②
JCR
P40021 GND
2 KEY1
3 KEY2
4 +3.5V_ST
5 GND
6 LED
7 +3.5V_ST8 GND
①
③
④
<LA Series>
Main Board
Repair Method by Parts 13-2. Remote Control Check(Troubleshooting)
40
Checking order
1, 2. Check IR cable condition between IR & Main board.3. Check the st-by 3.5V on the pin no 4,7.4. When checking the Pre-Amp when the power is in ON condition, it is normal when the Analog
Tester needle moves slowly, and defective when it does not move at all.
①
②
JCR
Error symptom Content
Video Error Colorerror
Adjustment Test pattern - ADJKey
Adjustments method after Repair 16. Tool option setting method after main B/D change(adjustment RGB Pattern)
41
You can view 6 types of patterns using the ADJ Key
Checking item: 1. Defective pixel2. Residual image3. MODULE error (ADD-BAR, SCAN BAR)4. Video error (Classification of MODULE or Main-
B/D!)
Step 1. Check full model name of your TV(Select one)a. Check a label on TV(Side or Rear)
b. Check menu(Non-Smart TV model)- Press(MENU) key on remot- Press((Red) “Customer Support” key on remote- Select “Produce/Service Info”- Check “Model/Type”
Step 2. Upgrade TVa. Make a folder “LG_DTV” on USB driveb. Save the software in “LG_DTV” folder. Make sure file is unzipped before placing in Folderc. Insert USB memory drive into USB port on TV
d. Select “Start” if “TV Software Upgrade” Pop-up appearse. Save the software in “LG_DTV” folder. Make sure file is unzipped before placing in Folderf. Insert USB memory drive into USB port on TV
Note)
Adjustments method after Repair 17. Software Upgrad method with USB Memory
JCR
42
b. Check SETUP(Smart TV model)- Press(Home) key on remot- Select “SETUP”- Move to “SUPPORT”- Select “Product/Service info”- Check “Model/Type”
If current software on TV is same with or newer thanThat on USB drive, TV software Upgrade menu won’t be opend(Some USB memory devices may not be compatible with TV)
Note)
Please wait while the update is copied to TV※ Don’t remove USB drive while this message is displayed※ Don’t unplug TV power cord while this message is displayed
Software upgrade in on progress※ Don’t unplug TV power cord while this message is displayed
After the upgrade is completed, this message is displayedTV will restart automatically in 5 sec, than TV is ready to use
Course title LCD TV Repair Guide Handbook
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Published on 04/01/2014
Developed by HE CS Technology Support Team
Published by Yongsu kim(e-mail: [email protected])
Updated on 11/02/2014
※ No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical,including photocopying, recording, or by any information storage or retrieval system without written permission from LGE.