TSI_2010 LED_LCD Model for Asia Oceania

Technical Support Information

Full HD: 42/37/32D25 series

2010 LED LCD Model for Asia / Oceania

Panasonic Corporation 2010

Unauthorized copying and distribution is

a violation of law.

cCS Promotion CenterAVC Networks CompanyPanasonic Corporation

Slide 1

TH-L42D25A

Index1.Features

2.Start-up Operation 2-1) Standby Operation2-2) Power ON Operation 2-3) Voltage Distribution

3.SOS Detect Circuit

4. Signal Process Circuit

5. Service Notes5-1) Service Mode5-2) SRV-TOOL5-3) Self check5-4) SD card

6. Troubleshooting Picture Problem)

7. Glossary

PresenterPresentation Notess

1. Features

1(1). Features

Audio processor, Micom and video signal processor are integrated to IC8000 Peaks-LDA2.

Tuner power BT30V was eliminated. (Tuner is operated by 5V).

TC-board is used between A-Board and PANEL.

Main Different points of 2009 model (V10 series) and 2010 model (D25 series)

As the backlight, LED is used. Inverter circuit is not used.

Panel Liquid Crystal Display with Light Emitting Diode (LED) backlight systemContrast 2,000,000 : 1

Pixel 2,073,600(1,9201,080)

HDMI InputAV inputAudio input for videoUSB

HeadphoneMonitor Out Analog audio outputDigital audio output

In

Out

Component video inputPC input

33Y2

1 1

Yes1

(e.g.) TH-L42D25A 1 (2). Features

1

Yes

PA

Chassis Structure (e.g.) TH-L42D25A

P2

CNAC

A15

A09

A12 A02 A10

5.8V, Key scanTo Speaker

STB5VSound15VF15VSUB ONBacklight ONSOS

1 (3). Features

CN01

To Backlight

Control Panel TC

CN02

TC05TC06

TC04 TC01

PWM

LVDS

V To Panel Control

V10 Power LED, Remote receiver

K

S01

Slide 6

AC Plug

( Key, Power Switch )

2.Start-up Operation

AP V

STBCircuit

A10 V10REMOTE

REC.

4 3

LED

5.8VS

CNAC

P2 A091 13

Command from IC1100

2-1 (1). Standby Operation

RESETSTB3.3V

IC50005.8VS STB3.3V

IC1100

GenX8

1 2

3

K

A02

S01

STB5.8V

STB5.8V2 12

2,1

2,1

IC5280

STB5V

Power Switch

When the TV is plugged in:AC is applied to the standby circuit in the power supply circuit to produce 5.8VS. 5.8VS is provided to A board via connector CN03 (Pin 1).

The 5.8VS from pin1 of connector P2 is sent to power switch in K board. By power switch ON, 5.8VS(STB5.8V) is applied to IC5280. And STB5.8V is converted to STB5V. And next, by IC5000, STB5V is converted to STB3.3V.STB3.3V is applied to Micom GenX8 IC1100. This energizes and prepares the microprocessor for program execution.

STB3.3V from IC5000 is applied to remote control receiver and the power LED on the V board through Pin 4 of A10.

If the STB3.3V is missing, the TV ceases to function (No power).

2-1 (2). Standby Operation

1

2

3

STBCircuit

A10 V10 REMOTEREC.

LED

5.8VS

F12V

PowerCPU

IC5200

IC5501

IC5500

RELAY

GenX8

5.8V5V

12V3.3V, 1.5V

12V1.2V

Red LEDON

IC5000

Backlight ON

IC1100

2-2 (1). Power ON Operation

1

9

Sound 17V

5V3.3V

5.8VS

STB3.3V

SUB5V

SUB5V

7

1

3

5

STB3.3V

1

7

3

4

A09P27

13

SUB 5V

13

5

9

10

7

1TV_SUB_ON

17V

1

2

3

1

6

4

7

CommandVoltage

5

5P A V

TC05TC01 TC04

for Right

TC

Q5241

CN02

CN01

174V

PanelPANEL CONTROL

BACKLIGHT

A15 1 547 51

for Left

12V12V

4

ON

For upper side LEDFor lower side LED

K S01A02

STB5.8V

2 12STB5.8V

1

1.2V1.2V

SUB3.3V

1.5V

STB5V

SUB5V

F1215V

IC5280 SUB3.3V

Panel VCC ON

Power Switch

CurrentControlCircuit

CurrentControlCircuit

15

3 TC06

BacklightON

PWM

IC9006ZWEI2


1

2

3

When the TV is plugged in:AC is applied to the STB(standby) circuit in the power supply circuit to produce 5.8VS. The 5.8VS is provided to the A board via connector P2 (Pin 1).The 5.8VS from pin1 of connector P2 goes to power switch in K board. After switch ON, 5.8VS (STB 5.8V) is converted to STB5V by IC5280 and applied to IC5000 on the A board.And by IC5000, STB5V is converted to STB3.3V. This energizes and prepares IC1100 for program execution.The STB3.3V is applied to the power LED on the V board through pin 4 of A10.After passing IC5200, SUB 5V is supplied to V board.

ON command from remote controller is received and sent to IC1100.

TV SUB ON command is sent to P board Power CPU through pin 5 at A09 terminal.

After receiving TV SUB ON command, power CPU makes relay ON.Sound 17V and F12 15V output.

F12 15V is supplied to A board.

After receiving SUB 3.3V, IC1100 sends Backlight ON command to Backlight powercontrol through pin 1 of A09 terminal.

After receiving this command, Backlight circuit output.

4

5

6

7

TV SUB ONThe SYSTEM MPU on the A board outputs the TV SUB ON command (3.2V) when the power switch is turned on. This command is used to turn on the circuit in the power supply that generates F12 15V and Sound 17V.F12 15V is provided to the A board to generate the sub-voltages used by the signal process circuit. The outputs of the sub-voltages 3.3V and 5V are confirmed by ASIC IC5000.

Backlight ONAfter receiving SUB3.3V, Backlight ON command is applied to P board Backlight power control from GenX8 to turn on Backlight power circuits.

Panel VCC ONNext, from GenX8, Panel_VCC_ON command is applied to Q5241 DC/DC converter to supply 12V to TCON board.

IC1100TV SUB ONBacklight ON

F12 15V

TV SUB ON, Backlight ON, Panel VCC ON


DC/DC Converters

STB3.3V

IC5000

12V

Distribute

DC/DC Converter

Sound 17V

A15

1-5PNL12V

PANEL_VCC_ON

IC5200, 5500, 5501

Q5241

GenX81

910

7

A09

5

( System

MPU )

A

STB5V

17V

STB5.8V

SUB5V

1.2V SUB1.5V

SUB3.3VSUB3.3V

To V board

TV SUB ON

IC5000 Remote Control Receiver

DC/DC ConverterAnalogue ASIC

5.8VS 5V3.3V

PCN03 A09

ON Command

114

13

5

1

9

113 Backlight ONIC1100 GenX8

IC5500

IC5501

IC5200 SUB 5VSUB 3.3V

1.5V

VA10

5

3

1V10

5

3

7SUB 5V

STB 3.3V

STB 3.3V

3

4

4

5

1 2SUB 5V

Sound 17V

10

9

7

4

7

SUB 3.3V

Panel VCC ON

F12 15V

CommandVoltage

SUB3.3V

2-3 (1). Voltage Distribution (SUB Voltages and STB Voltages)

15V 12V to TCON1-5

5A21

Q5241OutIn

6

12V

2 12STB 5.8V

K Board (Power Switch ON)

AIC5280

STB 5V

1.2V1.2V

SUB 3.3V

ON

SUB 5V

When the TV is plugged in, the 5.8VS is provided to the Power Switch in K board. After power switch is ON, 5.8VS is converted to STB5V by IC5280. And, next, by IC5000, STB5V is converted to STB 3.3V.

STB 3.3V is supplied to Remote Control Receiver in V board.

On the other hand, STB 3.3V is also supplied to GenX8 IC1100.

ON command from V board is supplied to A board IC1100 through pin 3 of A10 terminal.IC1100 confirms this command and sends TV SUB ON command to P board.

By this TV SUB ON command, F12 15V is sent to A board from P board via pin 9 and pin10 of A09 terminal. And, F12 15V is supplied to IC5500 and 5501.These 2 ICs convert 15V to SUB3.3V, 1.5V and 1.2V.

From IC1100 GenX8, Panel Vcc ON command outputs and by this command,from Q5241, 12V is output to TCON.

1

2

3

4

5

2-3 (2). Voltage Distribution (SUB Voltages and STB Voltages)

6

To V board

TV SUB ON

IC5000DC/DC ConverterAnalogue ASIC

STB 5V 5V3.3V

PP2 A03

ON Command

114

13

5

1

9

113 Backlight ONIC1100 GenX8

2-3 (3). Voltage Distribution (for driving )

IC5500

IC5501

IC5200 SUB 5VSUB 3.3V1.5V

V

SUB3.3V

STB 3.3V

STB 3.3V

SUB 5V

STB 1.2V

Sound 17V

9

10

7

4

5

7

SUB 3.3V

Panel VCC ON

Q5241

F12V

In Out

SUB 3.3V

IC2301Audio Amp

CN8850SD slot

D3300Optical Audio

TunerTU8302

JK4700-4703HDMI terminal

A10

5

3

V10

5

3

F12V, Sound 17VSUB 5V

SUB 3.3V

1

2

3

5

6

1

A

TCON

1 7

IC8701USB1

IC8700USB0

IC5300

SUB 3.3V

SUB 3.3V

5V

1DC/DC Converter

3

1-5A21

12V12V

4

122

1.2V

STB 5.8V

3.3V

1.2V

3.3V

USB5V

5.8VS

IC5280STB5V

K Board (Power Switch ON)

IC2952TUNER 5V5.8V

3

1

2

3

4

5

6

2-3 (4). Voltage Distribution

After sending TV SUB On command, F12 15V and Sound 17V are supplied to A board.F12 15V is supplied to DC/DC converters, IC5300, IC5501, IC5550, Q5241and IC2301 AMP.

F12 15V is supplied to IC5501 and converted to SUB 3.3V.SUB3.3V is supplied to IC5000 and monitored.

SUB 3.3V is distributed to D3300 Optical audio, CN8850 SD slot and IC2301 Audio amp.

By IC5300, F12 15V is converted to USB5V. USB5V is supplied to IC8700 USB0 andIC8701 USB1.

Controlled by Panel VCC ON command from IC1100, Q5214 supplies 12V to TCON via A21 terminal.

Backlight power of P board is started by this Backlight ON command from IC1100.Backlight power is supplied to back light unit from P board directly.

3.SOS Detect Circuit

When an abnormality occurs in the unit, the SOS Detect circuit is triggered and the TV shuts down.The power LED on the front panel will flash a pattern indicating the circuit that has failed.

Cautions:

If the power LED continues to blink even after the TV is unplugged, press and hold the power switch on the TV for a few seconds until the LED turns off.

Some steps require removal of connectors and sometimes PC boards removal. Do not allow the TV to run for more than 30 seconds while connectors or boards are disconnected.

3. (1) SOS Detect Circuit

3. (2) SOS Detect CircuitLED Blinking chart

Blinking Times Contents Check point

1 Backlight SOS A Board

P Board

3 TUNER 5V SOS A Board

4 SUB_12V SOS A Board

P Board

7 SUB 3.3V SOS A Board

9 SOUND SOS A Board

P Board

10 ZWEI2 SOS TC Board

Slide 19

3. (3) SOS Detect Circuit CommandVoltage

T301

T401

17V

F1215V

5.8VS1

13

2

12

1415

12

AA03

11127 IC5500

IC5501

IC5200

P2

547

SUB5.8V

IC5000F12 15V STB_3.3V

SUB_5V

Q5214F12V

Backlight ON

Backlight SOS

5.8VS

1 time Blink

9 times Blinks

10 time Blinks

SOUND SOS

TC05

TC01 TC04for Right

PANEL CONTROL

BACK LIGHT

for Left

A21

CN02

CN01

I201PFC

I301Power

STBI401

Control

Control

Current Control

Backlight ON

174VLine FilterRectifier

P

TC

PNL_12V

174V

174V

ON

3 times Blinks

4 times Blinks

47

7 times Blinks

#1#2

#3#4

I351A, I351B,Q356, Q555

1,12

1,13

ZWEI2 SOS

1

51

IC2301Sound 17V

5

SUB5V SOS

SUB3.3V SOS

F12 15V SOS

Panel

IC9006ZWEI2

IC1100

V Board

SUB_1.2V

SUB_3.3V

SUB_1.5V

ON

IC5300 SUB5V(USB) IC8000

GenX8

LDA2

17V

TUNER

(Switch)

3TC06

15

PWM

3. (4) SOS Detect Circuit CommandVoltage(LED 1 time Blinking)

T301

T401

17V

F1215V

5.8VS1

13

2

12

1415

12

AA03

11127 IC5500

IC5501

IC5200

P2

547

SUB5.8V

IC5000F12 15V STB_3.3V

SUB_5V

Q5214F12V

Backlight ON

Backlight SOS

5.8VS

1 time Blink

9 times Blinks

10 time Blinks

SOUND SOS

TC05

TC01 TC04for Right

PANEL CONTROL

BACK LIGHT

for Left

A21

CN02

CN01

I201PFC

I301Power

STBI401

Control

Control

Current Control

Backlight ON


P

TC

PNL_12V

174V

174V

ON

3 times Blinks

4 times Blinks

47

7 times Blinks

#1#2

#3#4

I351A, I351B,Q356, Q555

1,12

1,13

ZWEI2 SOS

1

51

IC2301Sound 17V

5

SUB5V SOS

SUB3.3V SOS

F12 15V SOS

Panel

IC9006ZWEI2

IC1100

V Board

SUB_1.2V

SUB_3.3V

SUB_1.5V

ON


GenX8

LDA2

17V

TUNER

(Switch)

3TC06

15

PWM

After sensing TV SUB ON command, F12 15V and some types of voltage are supplied.Next, IC8001 sends Backlight ON command to P board .

At the P board, Q356 receives Backlight On command. And, IC I351A and I351B starts working.After this, backlight power is supplied to LCD back light unit via CN01 and CN02 terminals.

If something has troubled, SOS signal is sent to I351A and I351B.This information is sent back to Q555.Q555 sends SOS to IC8001 directly and LED 1 time blinking starts.

1

2

3

(LED 1 time Blinking)3. (5) SOS Detect Circuit

Slide 22

Is there several voltage atPin 1 of A03 terminal afterSwitch ON?

No F12 15V is normal at Pin 4/5 of P2 terminal after Switch ON?

NoP board

Start

A boardIs there several voltage atPin 2 of A03 terminal afterSwitch ON?Backlight SOS signal is ON?

No

Backlight ON signal

YesYes

Yes

P board

(LED 1 time Blinking)3. (6) SOS Detect Circuit

Outputs are H at Pin 1 or Pin 12 of CN01/CN02 terminals after switch ON?

Yes

No

Panel

Power supply from backlight circuit has problem.

Without F12 15V,backlight circuit does not work

Slide 23

T301

T401

17V

F1215V

5.8VS1

13

2

12

1415

12

AA03

11127 IC5500

IC5501

IC5200

P2

547

SUB5.8V

IC5000F12 15V STB_3.3V

SUB_5V

Q5214F12V

Backlight ON

Backlight SOS

5.8VS

1 time Blink

9 times Blinks

10 time Blinks

SOUND SOS

TC05

TC01 TC04for Right

PANEL CONTROL

BACK LIGHT

for Left

A21

CN02

CN01

I201PFC

I301Power

STBI401

Control

Control

Current Control

Backlight ON


P

TC

PNL_12V

174V

174V

ON

3 times Blinks

4 times Blinks

47

7 times Blinks

#1#2

#3#4

I351A, I351B,Q356, Q555

1,12

1,13

ZWEI2 SOS

1

51

IC2301Sound 17V

5

SUB5V SOS

SUB3.3V SOS

F12 15V SOS

Panel

IC9006ZWEI2

IC1100

V Board

SUB_1.2V

SUB_3.3V

SUB_1.5V

ON


GenX8

LDA2

17V

TUNER

(Switch)

3TC06

15

PWM

Slide 24

3. (7) SOS Detect Circuit CommandVoltage(LED 3,4,7 times Blinking)

1

3

2

2

2

After sensing TV SUB ON command, F12 15V and some types of voltage are supplied.Next, IC8000 sends ON command to IC5300, IC5500, IC5501 and IC5200 .

SUB5.8V is connected to IC5000.From IC5200, SUB 5V outputs. And it is connected to IC5000.From IC5501, SUB3.3V outputs. And it is connected to also IC5000.

When voltage of SUB5.8V, SUB5V and SUB3.3V outputs are not normal, blinking starts.

1

2

3

(LED 3, 4, 7 times Blinking)3. (8) SOS Detect Circuit

Slide 25

Start

All of SUB5.8V, SUB3.3V, F12 15V outputs are OK?

Yes

(LED 3, 4, 7 times Blinking)3. (9) SOS Detect Circuit

No A board

A, P board

Slide 26

T301

T401

17V

F1215V

5.8VS1

13

2

12

1415

12

AA03

11127 IC5500

IC5501

IC5200

P2

547

SUB5.8V

IC5000F12 15V STB_3.3V

SUB_5V

Q5214F12V

Backlight ON

Backlight SOS

5.8VS

1 time Blink

9 times Blinks

10 time Blinks

SOUND SOS

TC05

TC01 TC04for Right

PANEL CONTROL

BACK LIGHT

for Left

A21

CN02

CN01

I201PFC

I301Power

STBI401

Control

Control

Current Control

Backlight ON


P

TC

PNL_12V

174V

174V

ON

3 times Blinks

4 times Blinks

47

7 times Blinks

#1#2

#3#4

I351A, I351B,Q356, Q555

1,12

1,13

ZWEI2 SOS

1

51

IC2301Sound 17V

5

SUB5V SOS

SUB3.3V SOS

F12 15V SOS

Panel

IC9006ZWEI2

IC1100

V Board

SUB_1.2V

SUB_3.3V

SUB_1.5V

ON


GenX8

LDA2

17V

TUNER

(Switch)

3TC06

15

PWM

Slide 27

3. (10) SOS Detect Circuit CommandVoltage(LED 9 times Blinking)

1

2

2

After sensing TV SUB ON command, F12 15V and Sound 17V output from T301.F12 15V is supplied to A board via pins 4 and 5 of P2 terminal.And, Sound 17V is supplied to A board via pin 7 of P2 terminal.

Sound 17V is connected to IC5000. When sound 17V is not normal, SOS signal from IC5000 goesto IC1100 GenX8.After receiving this information, IC1100 will start LED 9 times blinking.

1

2

3. (11) SOS Detect Circuit (LED 9 times Blinking)

Slide 28

After switch ON,17V is supplied to pin7 of P2 terminal before shut down.

No P board

Start

Yes

(LED 9 times Blinking)3. (12) SOS Detect Circuit

17V supply problem.

A board

Slide 29

Mainly I201, I301 or T301

Audio Amp, IC2301

T301

T401

17V

F1215V

5.8VS1

13

2

12

1415

12

AA03

11127 IC5500

IC5501

IC5200

P2

547

SUB5.8V

IC5000F12 15V STB_3.3V

SUB_5V

Q5214F12V

Backlight ON

Backlight SOS

5.8VS

1 time Blink

9 times Blinks

10 time Blinks

SOUND SOS

TC05

TC01 TC04for Right

PANEL CONTROL

BACK LIGHT

for Left

A21

CN02

CN01

I201PFC

I301Power

STBI401

Control

Control

Current Control

Backlight ON


P

TC

PNL_12V

174V

174V

ON

3 times Blinks

4 times Blinks

47

7 times Blinks

#1#2

#3#4

I351A, I351B,Q356, Q555

1,12

1,13

ZWEI2 SOS

1

51

IC2301Sound 17V

5

SUB5V SOS

SUB3.3V SOS

F12 15V SOS

Panel

IC9006ZWEI2

IC1100

V Board

SUB_1.2V

SUB_3.3V

SUB_1.5V

ON


GenX8

LDA2

17V

TUNER

(Switch)

3TC06

15

PWM

Slide 30

3. (13) SOS Detect Circuit CommandVoltage(LED 10 times Blinking)

1

2

When ZWEI2 IC9006 has trouble, it sends SOS command to IC8000.

10 times blinking will start.

1

2


Slide 31


TC board will be defective.

Slide 32

4.Signal Process Circuit

4-1 (1). Signal Process Circuit

AnalogDigital

A

IC8001

Peaks AVC

HDMI 1 SD Card

IC8000Peaks-LDA2

Video Signal Processor

Panel blockTuner block

HDMI I/F

10 bit A/D

Jpeg

SD I/F

Video Signal

Audio Signal Processor

HDMI 2

V, Y, Pb, Pr

V

TU8302

AV 2

AV 1

PC

LVDS Data

A22

HDMI 3

IC4700

USB1 USB2

TUNER

HDMI SW

USB I/F

IC8300OFDM

Monitor Out

IC3000

AV-SW

AV 3V

V

The main function of the A board is to process one of the incoming video signals. HDMI, SD and USB signals are connected to IC8000 directly. The video input signal can be in any of the three formats: Video, Y/C, or Y, Pb, Pr.

A comb filter of inside of IC8000 converts the composite video signal of the main picture to Y and C (luminance and chrominance) signals. S-Video, which is already Y/C separated, simply passes through the comb filter. The signal is then converted to RGB.

At the completion of this process, the format of the composite or S-Video signal is now the same as a digital 1080i component signal. If the incoming video is in the 480p, 720P, 1080i, and 1080p format, the Y, Pb, and Pr signals undergo A/D (analog to digital) conversion only. Finally all picture signals are converted to 1080p.

Digital television reception of the tuner is output in the form of an IF (Intermediate Frequency) signal .The transport stream from the tuner enters the VSB I/F (Interface) section of IC8000 where the video signal is extracted and converted to YUV data. The output is provided to the Video Input I/F of IC8000 for selection. The JPEG data of the SD card enters the JPEG I/F section of IC8000 for conversion into YUV data and output to the Video Input I/F circuit. The video input interface outputs the selected picture data to the video process circuit.

This Video Process section of the IC8000 performs all picture control operations such as brightness, contrast, color, tint, etc.On Screen Display data such as channel numbers, Digital TV closed caption, and picture adjustments are mixed with the video data. LVDS (Low Voltage Differential Signaling) and are output to LCD panel from A22 terminal..

4-1 (2). Signal Process Circuit Video Signal

AudioProcessor

Opt Audio out AMP

IC2301

HDMI1

AV1/2/3

SIFTUNER

TU2901A

Audio

X8000

(Serial data)

IC8000

A12

All the audio signal processing is done by the Main CPU/Signal Processor IC8000.

The digital audio signal from IC8000 is output to the optical audio output jack as PCM/Dolby Digital.

Serial data is output to the audio amplifier IC2301. The output of IC2301 is connected to the speakers.

(Digital audio)

Slide 36

4-2 (3). Signal Process Circuit Audio Signal

L & R

IC3000

AV SW

IC8300

OFDM

HDM2/3 IC4700

Switch

HDMI RX

Monitor out

Headphone

(Digital audio)

(Digital audio)

5.Service Notes

While pressing the VOLUME - button of the main unit, press the Info button

of the remote controller 3 times within 2 seconds.

How to exit:Switch off the power with the POWER button on the main unit or the POWER button on the remote control.

Key command[1] button...Main items Selection in forward direction[2] button...Main items Selection in reverse direction[3] button...Sub items Selection in forward direction[4] button...Sub items Selection in reverse direction[VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )

Service Mode

5-1. Service Notes =Service Mode=

Screen display (For reference)

How to display Power ON time & Counter1.Move the cursor to the lower right corner. 2.Press Mute button of remote control (5sec).

(2) Power ON time & Count

(1) Power SOS (LED blinking) history

Time : 00006 : 40Hour Minute

Please select SRV-TOOL at service menu.SRV-TOOL functions are as follows.

PTCT: 0b, 0b, 06, 07, 07

First SOS after shippingSecond SOS after shipping

Previous SOSSecond previous SOSLatest SOS

Please check the PTCT

On/Off : 0000082 times

Numbers are not decimal but hexadecimal.decimal: 1,2,3,4,5,6,7,8,9,10,11, 12, 13, - - -hexadecimal: 1,2,3,4,5,6,7,8,9, a, b, c, d, - - -

Over writing

5-2. Service Notes =SRV-TOOL=

Slide 39

Screen display (For reference)

PresenterPresentation NotesThese are other three functions of Service tool.1. Power SOS history2. Power On time and On/Off3. Memory editor of service tool

Power On time and count is changed to Power On time and On/Off.Memory editor function should not be used for service. When changing the data by memory editor function wrongly, TV set will not work .

Self-check indication only:

Diagnosis results are indicated by OK.

NG mark means defective.

Ref. No. of component is shown on the above list.

5-3. Service Notes =Self check mode=

DiagnosisScreen display (For reference)

Slide 40

Component

While pressing the VOLUME - button of the main unit, press the OK button of the remote control for more than 3 seconds.

Self-check indication only:While pressing the VOLUME - button of the main unit, press the MENU button of the remote control for more than 3 seconds.

5-4 (1). Service Notes =SD card=Purpose

When exchanging A board, the data in original A-board can be copied to SD card and then copy to new A-board

Following data can be copiedUser setting data(Including Hotel mode setting data)Channel scan dataAdjustment and factory preset

Board replacement Hotel mode settingWhen installing a number of units in hotel or any facility, the data in master TV can be copied to SD card and then copy to other TVs

PreparationSD card capacity, 32MB is enough for this service.Make pwd files as start up file for (a) or (b) in the empty SD card.Insert the empty SD card to your PC.Click right a blank area in a SD card window, point New and then click text document .A new file Is created by default New Text Document .txt.Make the file name for each purpose as follows.(a) For board replacement : boardreplace.pwd(b) For Hotel (installation) : hotel.pwd

Slide 41

5-4 (2). Service Notes =SD card= Copy data from TV to SD card

Dont pull out the SD card !during the operation.

Please wait until completedMessage appear.

Turn ON the TV unit.Insert SD card of pwd form.On screen display, message appears automatically.Input pwd.

For Board replacement : 2770For Hotel mode : 4850

After completion, turn off the TV for exit.

Slide 42

5-4 (3). Service Notes =SD card= Copy data from SD card to TV

Dont pull out the SD card !during the operation.

Please wait until completedMessage appear.

Turn ON the TV unit.Insert SD card of pwd form.On screen display, message appears automatically.Input pwd.

For Board replacement : 2771For Hotel mode : 4851

After the completion, turn off the TV for exit.

Slide 43

6. TroubleshootingPicture problem)

Sample Picture

Diagnosis

Conclusion: Exchange the Panel

6 (1). Troubleshooting

The Gate driver is defective.It is impossible to exchange.So, exchange LCD panel.

LCD Panel (Gate Driver is in Panel)

Source Driver

GateDriver

A board

TC board

Slide 45

LVDS DATA

LVDS DATAControl DATA Abnormal area

(LVDS= Low Voltage Differential Signaling)

Sample PictureConclusion: Exchange the Panel

Diagnosis

In this case, half area has trouble.So, half of source driver is defective.It is impossible to exchange only source driver.So, exchange LCD panel.


Slide 46


Source Driver

GateDriver

A board

TC board

LVDS DATA

LVDS DATAControl DATA Abnormal area



DiagnosisIn this case , small vertical line problem is LCD panel defect.Because if IC8001 Nile-TCON has trouble, there are many vertical lines at all over screen.


Slide 47


Source Driver

GateDriver

A board

TC board

LVDS DATA

LVDS DATAControl DATA

Abnormal line

Abnormal bar



DiagnosisIn this case , small horizontal line problem is LCD panel defect.Because if video signal processor has trouble, there are many horizontal lines at all over screen.


Slide 48


Source Driver

GateDriver

A board

TC board

LVDS DATA


Abnormal lines

Abnormal line



DiagnosisIn this case, screen color uniformity is abnormal.LCD panel is transformed by some stress.For example: strong screw or dropping shock.So, for such trouble, we have to exchange LCD panel.


Slide 49


Source Driver

GateDriver

A board

TC board

LVDS DATA


Abnormal area

Abnormal area


Sample PictureConclusion: Exchange the A board or TC board

DiagnosisIn this case , many vertical lines at all over screen are by A board or TC board defect.If we can find just small line (right photo) is panel defect.

Panel Defect


Slide 50


Source Driver

GateDriver

A board

TC board

LVDS DATA


many vertical lines

many vertical lines


Sample PictureConclusion: Exchange the A board

DiagnosisOSD (On Screen Display) is generated at IC8001 Nile-TCON in A board.So, this case is A board defect.


Slide 51


Source Driver

GateDriver

A board

TC board

LVDS DATA


Abnormal OSD


Conclusion: Exchange the A board Sample Picture

DiagnosisStrange color or discolor is A board defect, mainly IC8001 Nile-TCON.So, exchange A board.


Slide 52


Source Driver

GateDriver

A board

TC board

LVDS DATA


Strange color

Strange color part


7.Glossary

7.Glossary (1/3)

ResolutionResolution is a combination of values that express the quality of displayed images. A display's resolution is indicated by the number of dots in the horizontal and vertical directions of the screen, such as 1024 x 768 dots. Higher values indicate clearer, sharper image reproduction. The larger the screen size, the higher the requiredresolution.HD (high-definition) panelThe HD panel has a resolution of 1,366 x 768 pixels and an aspect ratio of 16:9. It is designed for displaying the beautiful images of digital, high-definition broadcasts.Full HD (high-definition) panelThe term "full-HD panel" refers to 1,920 x 1,080 pixels panels that display progressive images of full-specification HDTV signals without the use of up sampling.Number of pixelsThe number of pixels indicates the resolution of the Image. The number of pixels of a digital image is expressed by the product of the number of pixels in the horizontal direction and the number of pixels (dots) in the vertical direction. The higher the number of pixels, the better the image quality. For plasma TVs and LCD TVs, the number of pixels is sometimes expressed by the following equation:number of pixels in horizontal direction x number of pixels in vertical direction x 3 (R, G, B).PixelA pixel is a tiny dot that forms the smallest basic unit of a displayed image. Digital images are composed of pixels, with all of the text and images displayed on the screen consisting of dots. Digital images are usually rendered by square pixels arranged vertically and horizontally in an orderly manner.

THXTHX is a trade name of a high-fidelity sound reproduction standard for movie theaters, screening rooms, home theaters, computer speakers, gaming consoles, and car audio systems. THX stands for Tomlinson Holman's eXperiment. The THX system is not a recording technology, and it does not specify a sound recording format: all sound formats, whether digital (Dolby Digital, SDDS) or analog (Dolby Stereo, Ultra-Stereo), can be "shown in THX." THX is mainly a quality assurance system. THX-certified theaters provide a high-quality, predictable playback environment to ensure that any film soundtrack mixed in THX will sound as near as possible to the intentions of the mixing engineer. AVCHDAdvanced Video Codec High Definition is a high-definition and standard-definition recording format for use in digital tape-less camcorders and digital cameras. It is based on the H.264/MPEG-4 AVC video compression standard. Audio is stored in compressed form (Dolby AC-3). The container format for the audio and video is MPEG transport stream.H.264H.264 is a standard for video compression, and is equivalent to MPEG-4 Part 10, or MPEG-4 AVC (for Advanced Video Coding). As of 2008, it is the latest block-oriented motion-compensation-based codec standard. The final drafting work on the first version of the standard was completed in May 2003.The intent of the H.264/AVC project was to create a standard capable of providing good video quality at substantially lower bit rates than previous standards (e.g. half or less the bit rate of MPEG-2, H.263, or MPEG-4 Part 2), without increasing the complexity of design so much that it would be impractical or excessively expensive to implement.YUVYUV is used for a specific analog encoding of color information in television systems Y' stands for the luma component (the brightness) and U and V are the chrominance (color) components.

7.Glossary (2/3)

YUVIs The color encoding system used for analog television worldwide (NTSC, PAL and SECAM). The YUV color space differs from RGB, which is what the camera captures and what humans view. Composite Video and S-videoThe original TV standard combined luma (Y) and both color signals (B-Y, R-Y) into one channel, which uses one cable and is known as "composite video." An option known as "S-video" or "Y/C video" keeps the luma separate from the color signals, using one cable, but with separate wires internally. S-video is a bit sharper than composite video.Component VideoWhen luma and each of the color signals (B-Y and R-Y) are maintained in separate channels, it is called "component video," designated as YPbPr when in the analog domain and YCbCr when it is digital. ASICAn Application-Specific Integrated Circuit (ASIC) is an integrated circuit (IC) customized for a particular use, rather than intended for general-purpose use.

7.Glossary (3/3)

LVDSLVDS (Low-voltage differential signaling ) is an electrical signaling system that can run at very high speeds over inexpensive twisted-pair copper cables

Update HistoryIssue date Update part Update explanation

July 13th. 2010 First version.

End

Slide Number 1 IndexSlide Number 31(1). FeaturesSlide Number 5Slide Number 62.Start-up OperationSlide Number 8Slide Number 9Slide Number 10Slide Number 11Slide Number 12Slide Number 13Slide Number 14Slide Number 15Slide Number 163.SOS Detect CircuitSlide Number 18Slide Number 19Slide Number 20Slide Number 21Slide Number 22Slide Number 23Slide Number 24Slide Number 25Slide Number 26Slide Number 27Slide Number 28Slide Number 29Slide Number 30Slide Number 31Slide Number 324.Signal Process Circuit4-1 (1). Signal Process CircuitSlide Number 35Slide Number 365.Service NotesSlide Number 38Slide Number 39Slide Number 40Slide Number 41Slide Number 42Slide Number 436. Troubleshooting Pictureproblem)Slide Number 45Slide Number 46Slide Number 47Slide Number 48Slide Number 49Slide Number 50Slide Number 51Slide Number 527.Glossary7.Glossary (1/3)Slide Number 55Slide Number 56Slide Number 57

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