2015 - LCD TV - Panasonicservice.panasonic.ca/pcs/EXT_TrainingMaterials/2015lcd_technical...2015 LCD TV Line up TC-65CX850U 4K Full Array (32 LED zones) Local Dimming 120Hz 3D Active

Circuit Operation and Troubleshooting

1

2015 - LCD TV

2015 LCD TV Line up

TC-65CX850U 4K Full Array (32 LED zones) Local Dimming 120Hz 3D Active glasses

TC-55CX850U 4K Full Array (32 LED zones) Local Dimming 120Hz 3D Active glasses

TC-65CX800U 4K Direct LED 120Hz 3D Active glasses

TC-60CX800U 4K Direct LED 120Hz 3D Passive glasses

TC-55CX800U 4K Direct LED 120Hz 3D Active glasses

TC-65CX650U 4K Direct LED 120Hz



TC-50CX600U 4K Edge Lit LED 60Hz

TC-65CS560C

TC-60CS560C

TC-55CS560C

TC-50CS560C

TC-60CS540C

TC-55CS540C

TC-50CS540C

TC-40AS560

2

1. Board Layout

3

Board Layout -1 (CS*** series )

50CS***

A

K

P LDP

WiF

i

G

K

65/60/55CS***

A

K

P

WiF

i

4GK board : only 65inch

Board Layout ( CX series )B

T

GK board : only 65inch

A

K

P PBG

K

A

K

P LDP

T*-50CX600T*-65/55CX800/850

WiF

iW

iFi

PB AP

LD

WiF

i

KMD

G

K

BT

BT

T*-50CX800

T*-65/60/55CX600

5GK board : only 65inch

Main Board Construction

6Except K, GK, MD boards

TC-**CS 540/560 TC-**CX 600

(4K)

TC-**CX 800

(4K)

TC-**CX 850

(4K)

Main SoC Peaks

sLD8A

MT5810 MT5810 MT5810

32inch A+P --- --- ---

40inch A+P --- --- ---

43inch A+P --- --- ---

49inch A+P --- --- ---

50inch A+P A+P+LDP --- ---

55inch A+P+LDP A+P+PB A+P+PB A+P+PB+LD

60inch A+P+LDP A+P+PB A+P+PB ---

65inch A+P+LDP A+P+PB A+P+PB A+P+PB+LD

A02

JK8452 A12

A10

P2

P

A

AC input

K10

WiFi Module

Speaker Speaker

K

A11

LD1

Board Layout -1

7

( 50CS540 )A+P

Board Name Function

A-Board Main Board

P-Board Power supply, Power key, Control key

K-Board Remote Receiver, LED

A02

A15

A12

A10

P2

PA

AC input

K10

WiFi Module

Speaker Speaker

K

(T-CON)

Not repairable,

One of the panel module

Bluetooth Module

A16

P3

Board Layout -2

( 50CX600 )

LDP

LDP1

LDP2

LDP3

LDP4

From LDP1From LDP2

JK8605

8

A+P+LDP

Board Name Function

A-Board Main Board

P-Board Power supply, Power key, Control key

LDP-Board Backlight Drive

K-Board Remote Receiver, LED

Board Layout -4

PA

WiFi Module

Speaker Speaker

(T-CON)

Not repairable,

One of the panel module

MD K

(Behind the stand)

Bluetooth Module

( CX800 )A+P+PB+LD

PB

LD

9

Board Name Function

A-Board Main Board

P-Board Power supply

PB-Board Power supply for Backlight Drive

Board Name Function

LD-Board Backlight Drive

K-Board Remote Receiver, Power LED

MD-Board Motion Detect Board (for direct talk)

2. Video Signal Processing

10

A

AV

Component

Antenna terminal

LAN

WiFi

OPT_out

Resize IP conv.OSD

HDMI1/2/3

IC8650

(LAN)

LVDS Data

to LCD Panel

USB1/2

IC8000

(Peaks LD6/sLD8A)

Bluetooth

TU670*

TUNERIC68**

De-Modulation

IC8601

(USB HUB)

Video/Audio Signal Process - 2

CS540/560 series

11

A

AV

Component

Antenna terminal

WiFi

IC8000(MT5810)

Resize IP conv.OSD2D->3D

USB2

TU670*

TUNERIC68**

De-Modulation

( V by One format )

LAN

IC4500 HDMI

SW

USB1

USB3.0

IC8601

(USB HUB)

to LCD Panel


IC9000(NTK)

Frame Rate Convert

HDMI

HDMI

HDMI

CX600 / CX650 series

12

OPT_ Out

A

AV

Component

Antenna terminal

WiFi

OPT_out

IC8000(MT5810)

Resize IP conv.OSD2D->3D

Bluetooth

TU670*

TUNER

USB

IC68**De-Modulation

USB3.0


IC9000 (NTK)

Frame Rate Convert

IC4300

(GCEX2)

HDRHexa-chroma

SD card

LAN

IC4500 HDMI

SW

HDMI

HDMI

HDMI

USB1

IC8601

(USB HUB)

CX800/850 series

13

( V by One format )

to LCD

Panel

Only CX850

The main function of the A board is to select and process one of the incoming video signals.

IC8601 is just a switch of USB signals. The built in WiFi module is connected by USB type

terminal.

Video input, Component Video Input, HDMI input and the composite video output of the tuner

are all connected to IC8000 for selection. The video input signal can be in two formats: Video, or

Y, Pb, Pr. A comb filter inside IC8000 converts the composite video signal of the main picture to Y

and C (luminance and chrominance) signals. The signal is then converted to RGB. At the

completion of this process, the format of the composite 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. 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 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 IC 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. If in 3D mode, it converts to the

right and left pictures. After the process, LVDS (Low Voltage Differential Signaling) is output to

LCD panel module. # IC9000 is the frame rate converting IC for high speed LCD panel.


14

<LCD Panel Test Mode> :When abnormal picture is displayed, troubleshoot by the test pattern in LCD module.If the picture is no problem, A board must be defective.

If the picture is also abnormal, LCD panel module must be defective.How to enter :

While pressing "volume(-)" button of the TV unit,press "option/yellow" button of the remote control 3 times within 2 seconds.

How to exit :Switch off the TV unit

#)The test pattern is created by the circuit in LCD Panel Module(T-CON board).

Troubleshoot for Video Signal Problem

Some patterns are automatically changed. The patterns depend onthe LCD panel.

A

IC8000

(Peaks/MTK )

Resize

IP conv.

LCD Panel

LCD Panel Module

T-CON

Test Pattern

15

FR A IC8000

(Peaks PRO4 )

Resize

IP conv.

IC9500 (GCX)

LCD Panel

LCD Panel Module

T-CON

Test Pattern

Test Pattern

IC9600 (GCX)

Test Pattern

<FR Test Mode> : Above listed series have a FR Test Mode. The test pattern comes from FR board.

If LCD Panel Test Mode is OK, check this FR Test Mode next.If LCD Test Mode is OK but the FR Test Mode is NG, then FR board must be defective.If both: LCD Test Mode and FR Test Mode are OK, then A board must be defective.

How to enter :During the above LCD Panel Test Mode, press “OK” button of the remote control.The pattern will change to shown in right.


#)The test pattern is created by the IC in FR board.

<LCD Panel Test Mode> :When abnormal picture is displayed, troubleshoot by the test pattern in LCD module.

If the picture is no problem, A board must be defective. If the picture is also abnormal, LCD panel module must be defective.

How to enter : While pressing "volume(-)" button of the TV unit, press "option/yellow" button of the remote control 3 times within 2 seconds.


The test pattern is created by the circuit in LCD Panel Module(T-CON board).

Troubleshoot for Video Signal Problem

16

Only AX800/AX850/AX900 models

this pattern only

Some patterns are automatically changed.The patterns dependon the LCD panel.

2014 AX800/850/900

A

IC8000

(Peaks/MTK )

Resize

IP conv.

LCD Panel

LCD Panel Module

T-CON

Test Pattern

<TV Self Test> : Customer can also check the picture and sound generated by internal data.If the picture and sound is no problem, the reason of trouble is mostly not a TV.

How to display :Menu HELP TV Self Test

#)The test pattern and test sound are created by the main IC on theA board.

TV Self Test

(OK)

Yes No

1) During this indication

“Self Check of Service Mode”

is working at the background.

2) If NG, indication is shown,

# A board is defective

3) If All OK, it shifts to picture

and sound test. 1.Antenna level low 2.Connection mistake 3.Input devices NG 4.Input select mistake

TV unit defective. (A board, Panel or Speaker)

Troubleshoot for Video/Audio Signal Problem

A

IC8000

(P Testeaks/MTK )

PatternResize

IP conv.

LCD Panel

LCD Panel Module

T-CONTestPattern

17

How to read total panel time and SOS history on AX800, AX850 and AX900 models

Enter: Main Menu �Help � VersionRead Status4: first block starts with letter A,B or C, then digits indicating real time

A – time within 100 hours

B – time within 200 hours

C – time over 201 hours

Below example shows panel with total of 586 hours

Status 5 indicates SOS

history in first block. Most

recent from left side in

hexadecimal number

18

3. Stand by / Start up Operation

19

P

LED

Drive

LCD Module

PNL12V

A

T-CON

board

STB3.3V

F15V16V

Output16V

5VS

1,2,3

7 7

1,2,3,4

12V

5V

3.3V1.5V1.1V

3.3V

9 9

1,2,3

TV_SUB_ON

12 12POWER_ON

POWER

Switch

1111BL_ON

STB5V

Output

(Ex. TNPA6070** )

LD1LCD Panel

20(*)The DC level is different by the LCD panel.

P3 A02/A02A

VLED(*)

PNL12V

A16

1-4

6-13

Voltage Distribution ( A+P Boards )

24V/40V(*)

Output

Ex. 50CS series(Each model has different pin allocation but operation is the same.)

LDP

P

POWER

Switch

LED

Drive

LCD Module

PNL12V

A

T-CON

board

LCD Panel

LDP2

P2

STB3.3V

F15V

STB5V

Output

VLED(*)

PNL12V

16V

5VS

A16

1-5

9 7

1,2,3,4

12V

5V

3.3V1.5V1.1V

3.3V

11 9

1-4,13

TV_SUB_ON

12 12POWER_ON

17

BL_ON

10-12

2,4,6,8

A02A

(Ex. TNPA6058** )

(Ex. TNPA6077** )

P31-4 8

28V/36V(*)

Output

LDP3 1-4 8

LDP4

LDP1

VLED(*)10-12

1,3,5,7

16V

Output

4

Reference : Voltage Distribution ( A+P+LDP Boards )

Ex. 50CX6#0 series


(Each model has different pin allocation but operation is the same.)

PB(Ex. TNPA6074**

LCD Module

T-CON

board

LCD Panel

P2F15V

PNL12V

16V

A16

1-5

1,2,3,4

12VPNL12V

1-4,13

17

BL_ON

A02A

)

P61 4

40V(*)

Output

PB61

PB4

16V

Output

4

Reference : Voltage Distribution ( A+P+PB Boards )

Ex. 55CX8#0 series

390V/(330/140V)(PFC output)

LED

Drive

PB3

VLED2(*)7-11

1-5

PB1

VLED1(*)7-10

1-4

4

Vcc

P A5V

3.3V1.5V1.1V

3.3V

TV_SUB_ON11 9

POWER_ON12POWER

Switch

12

STB5V

Output5VS9 7

STB3.3V(Ex. TNPA6060** )


(Each model has different pin allocation but operation is the same.)

P

A

LCD Module

Power

For

LED

(Back

Light)T-CON

board

LCD Panel

A02/A02AA16

7

1,2,3,4

STB5V

F15V

LD1Transformer

T7301

Q7403/05

PFC

T7201

IC7201

DC/DC

IC7301

P3

Q7402/04

7

24V/40V(*)

Output

16V

Output

1

4PNL12V

16V

VLED(*)

STB5V

3

9 9TV_SUB_ON

5

BL_ON11 11

LED

Drive

IC7800

1,2,3 1,2,3

DC/DC

IC7801

DC/DC

IC7503

POWERSwitch

When the TV is plugged in, the power board outputs 5V for standby voltage.

When the power supply receives the TV_SUB_ON signal, it outputs 2 different voltages:

•16V to the A board on pins 1, 2, and 3 of connector P3.

•24/40V to the LED backlight board on pins 1,2,3 and 4 of connector LD1.

12 12POWER_ON KEY3

6(light)

2

24V/40V(*)

1-4

6-13

(Ex. TNPA6070** )

Start up Operation-1

(Each model has different pin allocation but operation is the same)

After A board is ready to display, it outputs Backlight_on command to LED Drive circuit. 23

P

2

IC7503

6

HO 15

LO 11IC7301

VCC 10

VH

1Start Vcc

T7301

Q7301

Q7302

D7104,

7105

R7104-

7105

PGS

3

16V

4

FB PC7301

feedback

STB5V

PC7303

IC7401

CE

24V/40V(*)

Q7402/04

( OFF )

7

P3

D7102

Rectifier

( Through )T7201

D7217

C7215

VCC

Q7403/05D7412/13

C7423/40

( OFF )

< from AC plug in to : P board >1

PFC

1 - 3

PA 7403

IC7201

( OFF )

7

LD1

IC7801

AMPLED

Drive

IC7800 11

( TNPA6070** )( PFC = OFF

AC100V: 140V

AC240V: 330V)


1-4

6-13

Tr x2

Q7304/07

D7401

C7422/30

FUSE

PA 7406

13,15,

24

17-22

Tr

When the TV is plugged in, the rectifier start to produce DC voltage which leads

through PFC circuit directly to the power switches Q7301, Q7302. (PFC circuit

IC7201 does not operate at this moment.) Besides this DC voltage is provided also for

D7104, D7105 which provide start voltage to pin 1 of power supply IC 7301. When

the voltage on pin 1 rise up to predefined value IC7301 starts supplyinng of switching

pulses for Q7301, Q7302. Due to this current starts to lead through winding of T7301

which starts to generate output voltages. One of these voltages VCC is used for

power supplying of the IC 7301 to its pin 10.

When the power supply starts up, the 16V is providing by D7412,13/C7423,40. This

voltage leads to IC7503, which is 5 volts DCDC converter.

This voltage (STB5V) is provided to A board via connector P3 pin7. So if the TV is

plugged in, STB5V is provided to A board without trigger signal.

< from AC plug in to 1 : P board >


25

P AP3 A02

5VS

STB5V

IC5000 STB3.3V

K

A10 K10

REMOTE

LED

3 3

KEY3

3.3V77

3.3V

9 9LCD_TV_SUB_ON

IC7503

7 7

LED_on

1 2< from to : A board >

POWERSwitch

1212


IC8000 PEAKS

OFF

(It can receive only Power SW)

( Automatically )

Standby

(It can receive Power SW, Remote, Viera Link and so on)

Power LED: OFF

Power LED: RED

North America

Except North America Power LED: OFF Power SW on

25

SignalProcessing

(Each models are different pin allocation but operation is same.)

PA

P3 A02

5VS

STB5V

IC5000 STB3.3V

K

A10 K10

REMOTE

LED

3 3

KEY3

3.3V77

3.3V

9 9LCD_TV_SUB_ON

IC7503

7 7

LED_on

1 2< from to : A board >

POWERSwitch

1212

( Reference ) Start up Operation-4

3.3V

IC8712/5605IC8650

LAN

To WiFi adaptor

1

5V for WiFi

JK8605

LAN

1

JK8602

Enable

Enable

IC8603/8607

IC8000 PEAKS

SignalProcessing

The power line for LAN/WiFi

is changed from SUB power

to Standby power.

*) It is for “Power on by

Swipe & Share” function.

OFF

(It can receive only Power SW)

( Automatically )

Standby

(It can receive Power SW, Remote, Viera Link and so on)

Power LED: OFF

Power LED: RED

North America

Except North America Power LED: OFF Power SW on

26

The STB5V from pin7 of connector P3 is applied to the Analog ASIC (IC5000) for

supplying power to the Main CPU/PEAKS (IC8000) on the A board. The Analog ASIC

(IC5000) converts the STB5V to STB3.3V. This voltage energize and prepare the

microprocessor (CPU) for program execution. The STB3.3V from the Analog ASIC (IC5000)

is also applied to the remote control receiver and the power LED on the K board through

pins 3 of connector A10/K10.

When the Power Switch on, the key3 signal is grounded. (#1)

The IC8000 lights on the RED LED and is ready to power on the TV by receiving the Power

switch on, Remote on, Viera Link and so on. This is a standby state.

(#1)Only North America model: Power switch on is no need, automatically this procedure is

operated after the TV is plugged in. But the RED LED does

not light.

When the power on command from the power switch, the remote control and so on is

provided to IC8000 PEAKS, IC8000 first outputs the “TV_SUB_ON” command. The

“TV_SUB_ON” command is provided to power board via pin 9 of connector P3.

(#) Just after transition to Stand-by mode, the TV_SUB_ON(16V) output for few minutes.

(NorthAmerica model : 10s)

< from 1 to 2 : A board >


27

Power On

LED: Green

Stand-by

LED: Red

Power Off

LED: OFF

AC Off

RemotePow-SW

(Reference : State Transition Diagram)

Power On

LED: Red

Stand-by

LED: OFF

AC Off

Plug

Out

Plug

In

Plug

Out

Plug

In

Pow-SW /

Remote

< Except north America >

< North America >

Pow-SW

28

Plug Plug Plug Plug Plug Plug

Out In Out In Out In

P

2

IC7503

6

( TNPA6070** )

LO 11IC7301

VCC 10

VH

1Start Vcc

HO 15

T7301

Q7301

Q7302

Q7303

PC7302

Q7202

L=ON

D7104,

7105

R7104-

7105

PGS

3

16V

4

FB PC7301

feedback

STB5V

PC7303

IC7401

CE

24V/

40V(*)

Q7402/04

Q7401

LD1

7

9

16V

P3

SUB-ON

VCC

Standby/ON

Switch

D7102

Rectifier

PFC

IC7201 Q7201

T7201

D7217

C7215

8

7

VCC1 - 3

Q7403/05

D7401

C7422/30

D7412/13

C7423/40

1-4

IC7801

AMP LEDDrive

IC7800 11BL-ON

2 3< from to : P board >

L7804

FUSE

PA 7406

Anode

Cathode

Vcc

( PFC = ON

AC100V: 380V

AC240V: 380V)

SRV-16V

SRV-24V/40V SRV-VLED

SRV-5.3V


Q7810/12

TrTr

Tr x2

Q7304/07

6

STB(mode change)

6-13

13,15,17-22

PWM


When the power board receives the TV_SUB_ON signal from IC8000 via pin 9 of

connector P3, it outputs 2 different voltages:

16V to the A board on pins 1, 2 and 3 of connector P3.

24/40V(*) to the LED backlight board on pins 1,2,3 and 4 of connector LD1.

TV_SUB_ON command is carried to the primary side by PC7302. This voltage is leaded

to Q7202/7203 whcih provide the mode change signal to pin 6 of IC7301.

Therefore the operation of the IC 7301 changes the switching frequency from standby

state to working state and output voltages rise up.

Besides the ON command is connected to the Q7202 which provide power supply VCC

of PFC circuit. The PFC starts to operate then.

Output voltages from transformer T7301 start rising up until the moment when IC7401

started to operate. This IC measures the 16V line output in the secondary side. The

output of this IC is provided by PC7301 to pin 4 of IC7301. IC7301 adjust the switching

frequency by this feedback signal.

The TV_SUB_ON signal also switches on the Q7402/04 to provide output voltages

(16V and 24/40V(*) ) to other boards. The 24/40V(*) is provided to the LCD Module

( LED Backlight Power Supply ). The 16V is provided to the A board.

< from to : P board >2 3



A

P3 A02

1

2

3

Q7403

99

IC8716/5420

5V

IC8100

IC8101

3.3V

IC8715/8001

IC8705/5400

3.3V

1.8VIC5704

1.1V

1.5V

F1

5V

1

2

3

HDMI3.3V

SUB1.5V

SUB1.1V

SUB3.3V

TU1.8V

LCD_TV_SUB_ON

P Transformer

Q7402

24/40V(*)24/40V

Output

16V

Output

T7301

PA

20

02

1.2VIC5702

DMD 1.2V

DC

DC

EN

1-4

SUB5V

PFC

T7201

IC7201

DC/DC

IC7301

F15V

IC5000

ANALOG

ASIC

IC8000

PEAKS

LD1

< : A board (SUB voltage) >3

DC/DC

IC750377 STB5V STB3.3V

16V

FUSE

PA 7403

SUB5V

IC7800


32

( TNPA6070** )

The 16V(F15V) from the P board via pin1,2 and 3 of connector A02 is applied to Analog

ASIC IC5000 and ICs (Voltage regulators) on the A board to generate the SUB-Voltages

used for signal processing operation.

: SUB1.1V, 1.5V, 3.3V, 5V and HDMI3.3V, DMD1.2V, TU1.8V

Each voltage regulators start up by high state of DCDCEN signal which is pull up to F15V.

So F15V is provided to A board, each SUB-voltage regulator ICs start output.

< : A board (SUB voltage) >3

A02

Test pin

SRV-16V

A


33

F1

5V

SUB1.5V

PA

20

02

DC

DC

EN

F1

5V

A33

P Transformer

P3 A02

1

2Q7403

11

9

11

9

5V

IC8100

IC8101

3.3V

3.3V

1.8VIC5704

1.1V

1.5V

3

1

2

3

Q7402

HDMI3.3V

SUB1.1V

SUB3.3V

TU1.8V

24/40V(*)

LCD_TV_SUB_ON

24/40V(*)

Output

16V

Output

T7301IC7800

DCDC LEDDrive

6-13

1.2VIC5702

DMD 1.2V

12V

Panel_VCC_ON2

A161 2 3 4

BL_ON

LCD Module

PNL12V

SUB5V

T-CON

PFC

T7201

IC7201

DC/DC

IC7301

Back Light

F15V

IC5000

ANALOG

ASIC

IC8000

PEAKS

< 4 and 5 : A board (PNL voltage) >

16V

DC/DC

IC7503STB5V

BL_SOSTr

(*)The DC level is different by the LCD panel.

14 14

13,15,17-22

IC5300/5500

STB3.3V

FUSEPA 7403

VLED(*)


1-4

LD1

PWM1-8

IC8716/5420

IC8715/8001

IC8705/5400

77

( TNPA6070** )

The F15V is also used to generate the PNL-Voltage on A board. IC8000 outputs the

Panel VCC On2 signal. IC5300 starts generating the PNL12V by this signal. The

PNL12V is provided to T-con circuit of the LCD Module.

After that, IC8000 outputs the BL_ON command to the P board. The BL_ON command

turns on the IC7800 for LED backlight drive. Then the backlight starts lighting by PWM

signals, and LCD panel displays the pictures.

If the backlight drive circuit does not work normally, the BL_SOS signal is informed to

the IC8000. At that time, IC8000 stops outputting the TV_SUB_ON signal and blinks the

red LED 1 times.

< and : A board (PNL voltage) >4 5

34


Simple Power On Sequence (CS Series)

< Display start > 35

TV_SUB_ON signal

PFC circuit ( IC7201/T7201 ) start working

16V / 24(40)V output

PANEL_VCC_ON2 signal

PNL12V output

BL_ON_ON signal

Power LED Red Power LED off

Power SW on / Remote on

( Plug in )

STB5V output

Power OffStandbyPower On

Power LED Green

AC Plug in

STB5V (form P to A)

16V (from P to A)

PNL12V (from A to Panel(T-CON) )

Power on

SUB_ON (from A to P)

(Standby)

Power LED

Panel_Vcc_ON (from A to Panel(TCON))

BL_ON (from A to Panel(Backlight))

VLED (from P to Panel(Backlight) )

Standby / Power on

5V

16V

12V

Ex.24V VLED


PNL12V output

16V / 24(40)V up to VLED

< CS/C series >

Simple Power On Sequence (CX Series)

Power SW on / Remote on

< Display starts

>

( Plug in )

AC Plug in

STB5V output

36

16V / 24(40)V output / PFC circuit start working

Power On Standby Power Off

Power LED Red Power LED off

TV_SUB_OFF TV_SUB_OFF

Stop 16V / 24(40)V Stop 16V / 24(40)V

TV_SUB_ON signal

PNL12V output

Panel_Vcc_ON (from A to Panel(TCON))


Power LED Green

STB5V (form P to A)

16V (from P to A)

PNL12V (from A to Panel(T-CON) )

SUB_ON (from A to P)

Power LED

VLED (from P to Panel(Backlight) )

BL_ON (from A to Panel(Backlight))

(Standby)

Power on

(Standby)

Power on

Power on

Also 16V is necessary before Power LED on at first time.

Standby / Power on

5V

16V

12V

Ex.24VVLED

16V / 24(40)V up to VLED

BL_ON_ON signal

< CX series >

4. SOS Protection Circuit and Troubleshooting

(Except 1 time blink )

38

When an abnormality occurs in the unit, the “SOS Detect” circuit is triggered and the TV shuts down.

Shut down means that turn off the TV_SUB_ON signal. The power LED on the front panel will flash a

pattern indicating the circuit that has detected an abnormality.

LED Blinking Summary

39

Blinking Time Estimated Defect Board

Model name

(refer to the model

lineup page)

Detect content

MT5561 Peaks LD6

Peaks sLD8A

MT5810

BL_SOS (LED driver) 1 1(occurred 10s

after power on)

1 1 Panel/P

IROM SOS = Power on problem(No F15V/SUB3.3V voltage)

--- 1(occurred soon after power on)

quick 3 --- P/A

IROM SOS = Power on problem(No SUB5V/SUB1.5V/SUB1.1V voltage)

quick 3 P/A

No voltage SUB3.3V

(after wake up once)

7 7 7 7 A

Audio amplifier: SOUND_SOS 9 9 9 9 A/

Speaker

FRC_SOS (IC9000) --- --- --- 10 A

Back End SOS (inside of Peaks) --- 12 12 --- A

Emergency SOS 13 13 13 13 A

GCEX_SOS (IC4300)# Only CX8** series

--- --- --- 16 A

39

P Transformer

P3 A02

IC5000

IC8000

1

2

3

Q7403

14

11

9

14

11

9

IC8716/5420

5V

IC8705/5400

3.3V

IC8100

IC8101

3.3V

1.8VIC5704

1.1V

1.5V

F1

5V

1

2

3

Q7402

HDMI3.3V

SUB1.5V

SUB1.1V

SUB3.3V

TU1.8V

LCD_TV_SUB_ON

24/40V

Output

16V

Output

T7301

PA

20

02

LD1

1.2VIC5702

DMD 1.2V

DC

DC

EN

Panel_VCC_ON

A161 2 3 4

BL_ON

LCD Module

PNL12V

Lowvoltage detect

BL_SOS

IC4900

AMP

Over voltage protection

F1

5V

SOUND_SOS

SUB5V

T-CON

(OFF)

(OFF)ON OFF

9 Blink

1 Blink

7 Blink

PFC

T7201

IC7201

DC/DC

IC7301

detect

(OFF)N OFF

Back Light

N SOS

N SOS

Tr

FUSE

PA 7403

IC7800DCDC LED

Drive

48V(*)

24/40V

(TNPA6070**)


Protection Circuit

6-131-4

IC5300/5500

IC8715/8001

12V

A

F15V(16V) is supplied from P board. If the F15V /SUB voltage is not supplied

LED blinks 3 times (quick blink).

Power on.

Check if voltage F15V at

pin 1-3 of A02 connector

before LED blinks?

No

Yes

(15V)

A board

P board

Remove P3 connector.

Check if short-circuit at

pin 1-3 of A02

connector?

No

Yes

(Shorted)

A board (*)

PP3

1

2

3

16V

Q7403/0516V

A

IC8000C8716/542

5V

I 0

IC8705/5400

3.3V

IC8100

1.1V

1.5V

IC8101

F15V

SUB1.5V

SUB1.1V

SUB3.3V

PA

2002

DC

DC

EN

12V

IC4900

AMP

SUB5V

IC5300

A02

1

2

3(TNPA6070**)

Troubleshooting for LED Blinking ( only CS*** series : Quick 3 time blink )

41

LED blinks Detail error Board may defect

Quick 3 Power on problem(No F15V/SUB3.3V/SUB1.5V voltage)

P/A

F1

5V

DC

DC

EN

SUB3.3V is regulated by IC8705 from F15V. SUB3.3V is only available as long as DCDCEN signal

goes high. If the voltage SUB3.3V is not detected by IC8000, the LED indicator will blink 7 times.

(But if the SUB3.3V is not supplied at the power on, the LED indicator would blink quick 3 times.)

IN THIS CASE, A BOARD DEFECTS

16V

From P BOARD

AA02 IC80007 Blink

3.3V

1

2

3

SUB3.3V

Low voltage detect

IC****

IC****

IC****

Troubleshooting for LED Blinking ( 7 time blink )

42

IC8705/5400


7 No voltage SUB3.3V detected A

No

L/R speaker

(wire of speaker)

Audio amplifier is sourced power F15V from P board. If the amplifier work abnormally (may due to short-circuit or overload), the SOUND_SOS signal will go low level and be detected by IC8001

LED blinks 9 times.

Remove A12 connecter.

Power on.

Does LED blinks again? Yes

(9 time blinks)

A board

AA02

IC8000

1

2

3

IC4900

AMPF15V SOUND_SOS 9 BlinkN SOS

A12

16V

From P BOARD

Troubleshooting for LED Blinking ( 9 time blink )

43


9 Audio amplifier: SOUND_SOS A/Speaker

12 and 13 blinks is problem about IC8000 and software item.

10 blinks is problem about initialization of FRC IC (IC9000).

16 blinks is problem about initialization of GCEX IC (IC4300).

IN THIS CASE, A BOARD DEFECTS

44

Troubleshooting for LED Blinking ( 10/12/13/16 time blink )


10

(only CX*** series)

FRC_SOS (Initialization of IC9000) A

12 Back End SOS (inside of Peaks) A

13 Emergency SOS A

16

(only CX8** series)

GCEX_SOS (IC4300) A

No change

(LED keep lit)

LED blink (except TC- model)

LED off (TC- model)

Try the “LCD Panel

Test Mode”

Check if the Backlight is lit.

(open the back cover and

check from back side)

No lit

Lit

Disconnect A16# connecter.

Check if voltage

12V(PNL12V) at Test pin

(SRV-12V) in A board No

Yes

(12V)

Disconnect P4 connecter.

Check if voltage 24V/40V(*)

at Test pin (SRV-LED)

In P board

Yes

24V/40V(*)

NoReplace P board

Replace LCD Panel

(Backlight part)

Replace A board

Replace A board

Replace A board

Replace LCD Panel

(T-CON part)

Is the power LED situation

changed after pushing the

button for entering Test

Mode?

If entering the test mode,

the Power LED will Blink(except TC- model)

or OFF(TC- model).

Patterns are

displayed

No Picture

(*) The DC level is different by the LCD panel.44

Troubleshooting for No Picture and No OSD (Power LED is lit)

Check also the Protection Circuit page about the voltage line.

Refer to the block diagram “Troubleshooting for LED Blinking (1 time blink ) LED Drive Circuit in P Board -1”

Troubleshooting for No Power On (Power LED is off)

NG

Replace A boardCheck if the output of

STB5V.

Disconnect A02 connecter.

Short check of STB5V line

in A board. No

Shorted

Shorted

Replace P board

Replace A board

45

< CS/C series >

OK

Troubleshooting for No Power On (Power LED is off)

NG

Check if the output 16V

(SRV-16V in A board)

OK

NG

Disconnect PB4 connecter.

Short check the SRV-16V

In A board.

Shorted

Replace A board

Replace PB board

Check if the output of

STB5V.


Short check of STB5V line

in A board. No

Shorted

Shorted

Replace P board

Replace A board



In A board.

Shorted

Replace P board

Replace A board



In A board.Shorted

No shorted

Replace A board

Disconnect LDP3 connecter.


in P board.

Shorted

Replace P board

Replace LDP board

No shorted

No shorted

No shorted

49/50inch

55/60/65inch

< CX series >

OK

P

A

P3 LDP3LDP

16V

P2 A02

PA

PB16V

P2A02

PB4

CX series need both STB5V and 16V before lighting power LED. (Refer to Page40.)

46

5. Difference of LED Drive

Circuit (Troubleshooting for 1

time blink)

47

Structure of LED Drive Circuit ( in P/PB Board )

A

IC8000

(Peaks/MTK )

Resize

IP conv.

LCD PanelDr

Dr

LCD Panel Module

P

T-CON

LEDDrive

VLED(*)

16V, STB5V

PNL12V

Backlight24V

< 11. LED drive circuit in P/PB board >

A+P

PB24V LED

Drive

A

IC8000

(Peaks/MTK )

Resize

IP conv.

LCD PanelDr

Dr

LCD Panel Module

P

T-CON

PNL12V

16V, STB5V

BacklightVLED(*)390V

A+P+PB


A

IC8000

(Peaks/MTK )

Resize

IP conv.

LCD PanelDr

Dr

LD/

LDPLED

Drive

LCD Panel Module

Structure of LED Drive Circuit ( in LD/LDP Board )

P

T-CON

24V

PNL12V

16V, STB5V

Backlight

< 22. LED drive circuit in LDP/LD board >

VLED(*)

A+P+LDP/LD

LD

LEDDrive

PB24V

A

IC8000

(Peaks/MTK )

Resize

IP conv.

LCD PanelDr

Dr

LCD Panel Module

P

T-CON

PNL12V

16V, STB5V

Backlight58/88V(*)390V

A+P+PB+LD


A (with P)

Structure of LED Drive Circuit ( in LCD Panel Module )

A

IC8000

(Peaks/MTK )

Resize

IP conv.

LCD PanelDr

Dr

LEDDrive

LCD Panel Module

P

T-CON

24V(*)

PNL12V

16V, STB5V

Backlight

< 33. LED drive circuit in LCD Panel >

TH-50C400 H/Z


LCD PanelDr

Dr

LEDDrive

LCD Panel Module

T-CON

24V(*)

PNL12V

16V, STB5V

Backlight

IC8000

(RTD2644 )

Resize

IP conv.

A+P ATH-32C400/401/410 G/D

A

LCD Panel

Module

(LED Backlight)

IC7800

LED Control

BL_ON (High=ON)

P3

(TNPA6070**)

Cathord1

A02A

Anode1-4

Bright

Dark

.

.

.

L

O

G

I

C

BS1

BS2

BS8

Cathord2

Cathord8

.

.

.

VCC

CL1

Lighting Period

BL_SOS (Low=Normal)

FAIL (Low=fail)

STB

CL2

CL8

Current check

Current check

Power Supply 24V

( 1 Blink )

5V

IC7801 AMP

L7800

Q780

1

24/40V 48V(*)

16V

PWM

51

TV_SUB_ON (High=ON)


PWM1

PWM2

PWM3

PWM4

PWM5

PWM6

15

17

18

20

13

PWM7

PWM8

19

21

22

P2

P (LDP board part)

IC7800 checks the DCDC converter block and current and voltage of each output to LED in panel module.

(If disconnecting LD1 connector, 1 blink happens.)

LD1

SRV-VLED

< LED Drive Circuit in P Board >1

Troubleshooting for LED Blinking ( 1 time blink ) LED Drive Circuit in P Board -1

12 13

A02

PWM

.

.

.

.

.

.

.

.

1-4

8910

1112

13

6

7

9 2 9 9

IC8000

Peaks

11

14

10

8

11

14

11

14

Remove LD1 connector and

power on. Check if voltage 48V(*)

at pin 1(2,3,4) of LD1 connector

=SRV-LED before LED 1 blink?

Yes

48V(*)

No

(24V or

lower)

BL_SOS is generated by LED backlight drive block of P board and sent to IC8000 of A board via connector P2 at pin 14 when detecting malfunction of LED driver.

- Normal : BL_ON is high (3.3V) , BL_SOS is low (0V)

Yes

3.3V

No

Power on. Check if 3.3V

voltage (BL_ON) at pin11

of P2 before LED blinks?

P board

A board

52

Refer to the previous page block diagram. (TNPA6070**)

SRV-VLED


< LED Drive Circuit in P Board >1

Troubleshooting for LED Blinking ( 1 time blink ) LED Drive Circuit in P Board -2

Does the blinking start

soon after power on?

(#Peaks-LD6 model only)

Go to troubleshoot of quick 3 time

blink page

(check with that procedure)

No

(after

10sec)

Yes

Power off.

Short check between pin

6,7,8,9,10,11,12,13 of LD1

connector and GND.

One or more

Short to GND

No

P board Panel Module


1 LED driver: BL_SOS P>A>Panel

LCD Panel

Module

(LED Backlight)

PA LDP

BL_ON (High=ON)

LDP4A02A

IC8000

Peaks

Anode1-3

VCC

BL_SOS (Low=Normal)

FAIL (Low=fail)

STB4

5

LDP1

( 1 Blink )

5V

L7800

Q780

1

28/36V

32-100V(*)28/36V

16V

53

17

18

(TNPA6077**

TNPA6112**=No IC7901))

SRV-VLED

(*)The DC level is different

by the LCD panel.

IC7800

LED Control

.

BS. 8

CL8

PWM4PWM5PWM6

9

11

PWM7

PWM8

10

1213

PWM1

PWM2

PWM3

PWM4PWM5PWM6

PWM7

PWM8

IC7901

LED Control Cathord1

. CL2

.

BS. 8

L

O

G

I

C

BS1

BS2Cathord2

.

.

Cathord1 1

. CL2

L

O

G

I

C

BS1

BS2

Current check

Cathord2

Ca. thord8 8

.

.

CL1Currentcheck

PWM1

PWM2

PWM3

68

3

LDP3

1-4

8

(TNPA6058**)

Cat.hord8 8

CL1

CL8

Current check

Current check

IC7801 AMP

10-12

LDP2

10-12

P3

1-4

8

1-4,13 1-5

9 11

TV_SUB_ON

192122

24

16

23

2526

16V

Bright

Dark

Lighting Period

PWM

Troubleshooting for LED Blinking ( 1 time blink ) LED Drive Circuit in LDP Board -1IC7800 checks the DCDC converter block and current and voltage

of each output to LED in panel module.

1

2

2

SRV-VCC

P2

< LED Drive Circuit in LDP/LD Board >2


54Refer to the previous page block diagram.

P (TNPA6058**) SRV-VCC

LDP (TNPA6077**)SRV-VLED

Yes 58V(*)P board

Power off.

Short check between

pin1,2,3,4,5,6,7,8 of

LDP1/LDP2 connector and

GND.No

LDP board

Yes

3.3V

No


voltage (BL_ON) at pin4 of

LDP4 before LED blinks?

LDP boardPanel Module

A boardOne or more

Short to GND

BL_SOS is generated by LED backlight drive block in LDP board and sent to IC8000 of A board via connector LDP4 at pin 5 when detecting malfunction of LED driver.


*<Caution>: Don’t remove both of LDP1 and LDP2. Power on with removing only one of them. (There is a possibility of defect the LDP board.)

Remove LDP1 and LDP2

connectors and power on.

Check if voltage 32-100V(*) at pin

10-12(SRV-VLED) of LDP1/LDP2

connector before LED 1 blink?

Yes

28/36V(*)

No

Remove P3 connector and power

on. Check if voltage 28/36V(*)

at pin 1-4(SRV-VCC) of P3

connector before LED 1 blink?No

(32V or

lower)

Troubleshooting for LED Blinking ( 1 time blink ) LED Drive Circuit in LDP Board -2



1 LED driver: BL_SOS LDP>P>Panel

PA

LDP

LCD Panel

Module

(LED Backlight)

IC7800

LED Control

BL_ON (High=ON)

LDP2

Cathord1

A02A

IC8000

Peaks

Anode1-3

Bright

Dark

.

.

.

BS1

BS2

BS8

Cathord4

Ca.thord4

.

.

Cathord8

.

.

.

VCC

CL1

Lighting Period

BL_SOS (Low=Normal)

FAIL (Low=fail)

STB

CL4

CL8

9

11

Current check

Currentcheck

PWM1

PWM2

PWM3

PWM4

PWM5

PWM6

14

LDP5

15

17

18

20

13

( 1 Blink )

5V

IC7801 AMP

L7801

Q780

9

28/36V

32-100V(*)

16-20 28/36V

16V

PWM

55

9

11

14


Refer to also the Section “6.Difference of LED drive circuit location”.

(TNPA6073**)

SRV-VLED

PWM7

PWM8

19

21

10

LDP1

1

9-11 9-11

(TNPA6072**)

5-8

BS4

CL4

L

O

G

I

C

LDP6

5-8

P3

16-20

1-31-3TV_SUB_ON (High=ON)

15

17

18

20

13

19

21

10

1


( Reference ) Other Type LED Drive Circuit in LDP Board

P

A LCD Panel

Module

(LED Backlight)

IC

LED Control

P2 P4

(TNPA5916**)

A02

IC8001

MT5561

Bright

Dark

.

.

.

L

O

G

I

C

VCC

CL1

Lighting Period

FAIL (Low=fail)

STB

CL2

11

Current check

Current check

14( 1 Blink ) 5V

(24V)24V

PWM

56

10

8

2 9

3

BL_SOS (Low=Normal)

4 4

3

BL_ON (High=ON)

TV_SUB_ON (High=ON)

(Bright)

16V

16V 6

1

3

5

1

2

3

6

8

9

8

9

LCD module checks the LED drive block.

Troubleshooting for LED Blinking ( 1 time blink ) LED Drive Circuit in LCD Panel -1

< LED Drive Circuit in LCD Panel >3

SRV-VLED

Tr x2

(Q5009,

5010)

PWM13 2212

Tr

(Q5011)

Ex. TH-50C400H/Z

No

BL_SOS is generated by backlight LED drive block of LCD Panel and sent to IC8000 of A board via connector P2 at pin 14 when detecting malfunction of LED driver.


Remove P4 connector and power on.

Check if voltage 24V(*) at pin 8-

9(SRV-VLED) of P4 connector

before LED blinks?Yes

24V(*)

Panel Module

Yes

3.3V

No


voltage (BL_ON) at pin3

of P4 before LED blinks?

A board

Troubleshooting for LED Blinking ( 1 time blink ) LED Drive Circuit in LCD Panel -2


< LED Drive Circuit in LCD Panel >3

P board

P (TNPA5916**)

SRV-VLED

Ex. TH-50C400H/Z

Refer to the previous page block diagram.58


1 LED driver: BL_SOS Panel>P>>A

59

TNPA5916 TNPA6070 TNPA6058/6060/6163

(Reference) Pin Allocation of the Connecter P2 (to A board)

A02/A02A A02/A02A

Pin Name Pin Name

1 16V 1 16V

2 16V 2 16V

3 16V 3 16V

4 GND 4 GND

5 GND 5 GND

6 GND 6 GND

7 STB5V 7 STB5V

8 BL_ECO(no use) 8 BL_ECO

9 SUB_ON 9 SUB_ON

10 Key 10 Key

11 BL_ON 11 BL_ON

12 Power_ON 12 Power_ON

13 PWM1 13 PWM1

14 BL_SOS 14 BL_SOS

15 PWM2

16 3D_ON

17 PWM3

18 PWM4

19 PWM5

20 PWM6

21 PWM7

22 PWM8

A02/A02A

Pin Name

1 16V

2 16V

3 16V

4 16V

5 16V

6 GND

7 GND

8 GND

9 STB5V

10 Key

11 SUB_ON

12 Power_ON

13 Relay_ON(no use)

14 GND

TNP4G565/568/587(sLD8A) TNPH1116(LD6)/1123/1124(sLD8A) TNPH1120(MT5810)

(Reference) Pin Allocation of the Connecter A02/A02A (from P board)

60

A02/A02A A02/A02A A02/A02A

Pin Name Pin Name Pin Name

1 16V 1 16V 1 16V

2 16V 2 16V 2 16V

3 16V 3 16V 3 16V

4 GND 4 GND 4 GND

5 GND 5 GND 5 GND

6 GND 6 GND 6 GND

7 STB5V 7 STB5V 7 STB5V

8 BL_ECO 8 BL_ECO 8 BL_ECO

9 SUB_ON 9 SUB_ON 9 SUB_ON

10 Key 10 Key 10 Key

11 BL_ON 11 BL_ON 11 BL_ON

12 Power_ON 12 Power_ON 12 Power_ON

13 PWMA 13 PWMA 13 PWMA

14 BL_SOS 14 BL_SOS 14 BL_SOS

15 PWMB 15 PWMB

16 3D_ON

17 PWMC

18 PWMD

19 PWME

20 PWMF

21 PWMG

22 PWMH

A02/A02A

Pin Name

1 16V

2 SUB_ON

3 16V

4 Power_ON

5 16V

6 key

7 NC

8 BL_SOS

9 GND

10 BL_ON

11 STB5V

12 BL_PWM

13 GND

14 GND

A02/A02A

Pin Name

1 16V

2 16V

3 16V

4 16V

5 GND

6 GND

7 STB5V

8 Key

9 SUB_ON

10 Power_ON

11 Relay_ON(no use)

12 NC

13 16V

14 GND

15 BL_ECO

16 PWM1

17 BL_ON

18 BL_SOS

19 PWM2

20 3D_ON

21 PWM3

22 PWM4

23 PWM5

24 PWM6

25 PWM7

26 PWM8

--- ---

49inch --- A+P --- --- ---

50inch --- A+P A+P+LDP --- ---

55inch --- A+P+LDP A+P+PB A+P+PB A+P+PB+LD

60inch --- A+P+LDP A+P+PB A+P+PB ---

65inch --- A+P+LDP A+P+PB A+P+PB A+P+PB+LD2

2

2

2

2

2

1

1

1

1

1

1

1

1

1

61Except K, GK, MD boards

TC-40C

400B

TC-**CS

540/560/600/630

TC-**CX

600/640/650

(4K)

TC-**CX

700/800 (4K)

TC-**CX

850 (4K)

Main

SoC

Peaks

sLD8A

Peaks

sLD8A

MT5810 MT5810 MT5810

32inch --- A+P --- --- ---

40inch A+P A+P --- --- ---

43inch --- A+P ---

LED drive circuit location

1

1

1

1 LED drive circuit in P/PB board

2 LED drive circuit in LDP/LD board

3 LED drive circuit in LCD Panel

Documents

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