Panasonic LCD-2016 Technical Manual

Model No. LCD-2016

2016 - LCD TV

Circuit Operation and Troubleshoot

c Panasonic Corporation 2016

Unauthorized copying and distribution is

a violation of law.

1

INDEX

1.Board Layout

2.Video Signal Processing

3.Power Supply

3-1. Power Board Structure

3-2. Stand by / Start up Operation

4.SOS Protection Circuit and Troubleshooting (except 1 time blink)

5.Difference of LED Drive Circuit (Troubleshooting for 1 time blink)

2

1. Board Layout

3

Board Layout -1 ( DX*** series )

T*-**DX900

G

P PB A

K

K

T*-65DX***, TH/TC-55DX***

G P PB A
K

K

T*-40DX*** T*-49/50/58DX***, TX-55DX***

LDP

G

P

A

G

P

A

K K

K K

GK board : depend on the model BT : depend on the model and region

4

Board Layout -2 ( D/DS*** series )

T*-49/43DS*** T*-65/55DS***
T*-

49/43D***

LD

LDP

G

P

A

G

P

A

K

K

K K

T*-50/40/32DS***
T*-40/32D***

P

G A
K

TH-32D400

A

(P + A + GK)

K K

WiFi : only DS*** series

BT : only TC-**DS6**, TX-**DS630 series GK board : depend on the model

5

Main Board Structure

D4** DS6** DX6**/7**/8** DX900

(4K) (4K)

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

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

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

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

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

55inch --- A+P+LDP A+P , ---

A+P+PB: (only

TH-55DX640*,
TC-55DX700*)

58inch --- --- A+P A+P+PB

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

Except K, GK boards

6

Board Layout -1

A+P

P3

P

A15

A10

AC input

Speaker

( 32D400 )

A02

A

A12

Speaker

K10

K

Board Name Function

A-Board Main Board

P-Board Power supply, Backlight Drive, Power key, Control key

K-Board Remote Receiver, LED

7

Board Layout -2

A+P+LD/LDP

P5

P4

P

GK

P2

WiFi Module

AC input

Speaker

LD2

LD1

LD A15 A10

A19

A12

(T-CON)

Not repairable,

One of the panel module

( 49DS630 )

A02

A

Speaker

K10 K

Board Name Function Board Name Function

A-Board Main Board GK-Board Key

P-Board Power supply for Signal Process K-Board Remote Receiver, Power LED

LD-Board Power supply for Backlight Drive

8

Board Layout -3

GK

A+P+PB

PB1

PB6 P6

PB5

( 65DX900 )

A08

A02

P2 A15

A16

PB2

WiFi Module

PB

PB3 P3

Speaker

P

AC input

(T-CON)

Not repairable,

One of the panel module K10

A17

A12

A10

Speaker

K

A

Bluetooth Module

Board Name Function Board Name Function

A-Board Main Board GK-Board Key

P-Board Power supply for Signal Process K-Board Remote Receiver, Power LED

PB-Board Power supply for Backlight Drive

9

2. Video Signal Processing

10

Video/Audio Signal Process - 1

D4** series

OPT_out

A

USB1

Antenna
terminal

AV

Component

HDMI1/2

TU670*

TUNER

IC68**

De-Modulation

IC8000
(

MTK5561)

Resize
IP conv.
OSD

LVDS Data

to LCD Panel

The input terminals are different by the models or countries.

11

Video/Audio Signal Process - 2

DS6** series

WiFi

Bluetooth

USB1/2

Antenna TU670*
terminal TUNER

AV

Component

LAN

HDMI1/2/3

IC8601

(USB HUB)

IC68**

De-Modulation

IC8650

(LAN)

OPT_out

IC8000
(

Peaks LD6/

sLD8A)

Resize
IP conv.
OSD

A

LVDS Data

to LCD Panel

The input terminals are different by the models or countries.

12

SCART
(Europe)

CI - slot
(Europe)

Video/Audio Signal Process - 3

DX6** / DX7** / DX8** series

WiFi

OPT_out

(*1)Bluetooth

IC8601

USB2

USB1

USB3.0

Antenna
terminal

AV

Component

LAN

(USB HUB)

TU670* IC68**

TUNER De-Modulation

IC8000
(

MT5810) IC9000

(Mstar/NTK)

Resize
IP conv. Frame Rate

OSD Convert
2D->3D

A

to LCD Panel

( V by One format )

HDMI1/2/3/(4)

(except below

models

HDMI1/2/3/(4)

(TX-DX8**
TH-DX640

TC-DX700C)

IC4500
HDMI
SW

(*1) Bluetooth : only DX9**/7** (except TC-**DX700C)

The input terminals are different by the models or countries.

13

CI - slot
(Europe)

Video/Audio Signal Process - 4

DX900 series

WiFi

Bluetooth

USB2

USB1

USB3(3.0)

SD card

(only TC/TX

Antenna TU670*

OPT_out

IC8705

(USB HUB)

IC8000
(

MT5810)

IC4300

IC68** Resize (GCEX2)

De-Modulation IP conv.

IC9000
(NTK)

A

to LCD

Panel

terminal TUNER

Component

LAN

HDMI1/2/3/4

OSD HDR
2D->3D Hexa-

chroma

IC4500
HDMI
SW

Frame Rate
Convert

( V by One format )

(*) The input terminals are different by the models or countries.

14

Video/Audio Signal Process - 5

The main function of the A board is to select and process one of the incoming video signals.
IC8601 ( or IC8705) is just switches of USB signals. The built in WiFi module is connected by
USB type of 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 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. IC4300
adjust the brightness for HDR feature.

15

Troubleshoot for Video Signal Problem

<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. Just in
case, confirm the flat cable connection between A board and T-CON board.

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).

A LCD Panel Module

IC8000 LCD Panel

Some patterns are
automatically changed.
The patterns are depend
on the LCD panel.

(Peaks/MTK )

Resize

IP conv.

T-CON

Test
Pattern

16

Troubleshoot for Video/Audio Signal Problem

<TV Self Test> : Customers also can check the picture and sound 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 the A board.

TV Self Test

(OK)

1) During this indication
“Self Check of Service Mode”
is working at the background.

*) does not apply to D400/410 series

2) If NG, indication is shown.

# A board defective

3) If All OK, it shifts to picture

and sound test.

Yes

1.Antenna level low

2.Connection mistake

3.Input devices NG

4.Input select mistake

No

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

A

IC8000

Test

Pattern

IP conv.

LCD Panel Module

T-CON LCD Panel

17

3. Power Supply

3-1. Power Board Structure

18