Panasonic TH-50LFE6W Schematic

ORDER NO.ITD1308049CE

FULL HD LCD Display

Model No. TH-50LFE6W

LA45 Chassis

© Panasonic Corporation 2013
Unauthorized copying and distribution is a violation
of law.

TH-50LFE6W

TABLE OF CONTENTS

1 Safety Precautions -----------------------------------------------3

1.1. General Guidelines ----------------------------------------3

1.2. Touch-Current Check--------------------------------------3

2Warning--------------------------------------------------------------4

2.1. Prevention of Electrostatic Discharge (ESD)
to Electrostatically Sensitive (ES) Devices ----------4

2.2. About lead free solder (PbF) ----------------------------5

3 Service Navigation------------------------------------------------6

3.1. Service Hint--------------------------------------------------6

3.2. Applicable signals ------------------------------------------7

4 Specifications ------------------------------------------------------8
5 Service Mode -------------------------------------------------------9

5.1. CAT (Computer Aided Test) mode ---------------------9

5.2. IIC mode structure (following items value is
sample data)----------------------------------------------- 13

6 Troubleshooting Guide---------------------------------------- 14

6.1. Self Check ------------------------------------------------- 14

6.2. No Power--------------------------------------------------- 18

6.3. No Picture -------------------------------------------------- 18

7 Disassembly and Assembly Instructions --------------- 19

7.1. PCB Layout ------------------------------------------------19

7.2. Preparation ------------------------------------------------ 19

7.3. About disassembly and replacement --------------- 19

7.4. Back Cover removal ------------------------------------- 20

7.5. A-Board replacement------------------------------------ 20

7.6. P-Board replacement------------------------------------ 21

7.7. FR-Board replacement---------------------------------- 22

7.8. GK-Board and Key Button Bracket
replacement ----------------------------------------------- 22

7.9. Speaker Unit L/R replacement------------------------ 23

7.10. K-Board, LED Panel and LED Panel Case
replacement ----------------------------------------------- 23

7.11. Rear Panel BTM Assy replacement ----------------- 23

7.12. Rear Panel Top/L/R Assy replacement------------- 23

7.13. Rear Panel Metal Bot L/R replacement------------- 24

7.14. Metal Bracket Bottom replacement ------------------ 24

7.15. Rear Panel Metal Top/L/R replacement ------------ 25

7.16. LCD Panel replacement -------------------------------- 26

7.17. Caution about the sticking parts of LCD Panel --- 28

8 Block Diagram --------------------------------------------------- 31

8.1. Diagram Notes -------------------------------------------- 31

8.2. Main Block Diagram ------------------------------------- 32

8.3. Block (1 of 3) Diagram ---------------------------------- 33

8.4. Block (2 of 3) Diagram ---------------------------------- 34

8.5. Block (3 of 3) Diagram ---------------------------------- 35

9 Wiring Connection Diagram --------------------------------- 37

9.1. Wiring Connection Diagram --------------------------- 37

PAG E PAG E

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TH-50LFE6W

1 Safety Precautions

1.1. General Guidelines

1. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.

2. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the
wires have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead.

3. When conducting repairs and servicing, do not twist the Fasten connectors but plug them straight in or unplug them straight
out.

4. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or
damaged by the short circuit.

5. After servicing, see to it that all the protective devices such as insulation barriers, insulation papers shields are properly
installed.

6. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

1.2. Touch-Current Check

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.

2. Connect a measuring network for touch currents between each exposed metallic part on the set and a good earth ground
such as a water pipe, as shown in Figure 1.

3. Use Leakage Current Tester (Simpson 228 or equivalent) to measure the potential across the measuring network.

4. Check each exposed metallic part, and measure the voltage at each point.

5. Reserve the AC plug in the AC outlet and repeat each of the above measure.

6. The potential at any point (TOUCH CURRENT) expressed as voltage U

For a. c.: U1 = 35 V (peak) and U2 = 0.35 V (peak);

For d. c.: U

Note:

The limit value of U

mA d. c.
The limit value U

7. In case a measurement is out of the limits specified, there is a possibility of a shock hazard, and the equipment should be
repaired and rechecked before it is returned to the customer.

= 1.0 V,

1

= 0.35 V (peak) for a. c. and U1 = 1.0 V for d. c. correspond to the values 0.7 mA (peak) a. c. and 2.0

2

= 35 V (peak) for a. c. correspond to the value 70 mA (peak) a. c. for frequencies greater than 100 kHz.

1

and U2, does not exceed the following values:

1

Figure 1

3

TH-50LFE6W

2Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi­tive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec­trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and
semiconductor “chip” components. The following techniques should be used to help reduce the incidence of component damage
caused by electrostatic discharge (ESD).

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alumi­num foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as “anti-static (ESD protected)” can
generate electrical charge sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or compara­ble conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material
to the chassis or circuit assembly into which the device will be installed.

Caution

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise ham less motion such as the brush­ing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient
to damage an ES device).

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TH-50LFE6W

2.2. About lead free solder (PbF)

Note: Lead is listed as (Pb) in the periodic table of elements.
In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder.
The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu).
That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.

This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work, we’d
suggest the use of Pb free solder as well, although Pb solder may be used.
PCBs manufactured using lead free solder will have the PbF within a leaf Symbol PbF stamped on the back of PCB.

Caution

• Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please
use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).

• Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C).
If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb sol­der. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.

• After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the
opposite side. (see figure below)

Suggested Pb free solder

There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. How­ever, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.

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3 Service Navigation

3.1. Service Hint

Board Name Function

P-Board Power supply

Non serviceable.
P-Board should be exchanged for service.

A-Board Digital core signal processor

Non serviceable.
A-Board should be exchanged for service.

FR-Board Double speed processor

GK-Board Switch

K-Board Power LED, Remote receiver, C.A.T.S. sensor

Non serviceable.
FR-Board should be exchanged for service.

Non serviceable.
GK-Board should be exchanged for service.

Non serviceable.
K-Board should be exchanged for service.

6

3.2. Applicable signals

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4 Specifications

Power Source 220-240 V AC, 50/60Hz
Power Consumption

Rated Power Consumption 90 W
Stand-by condition 0.5 W
Power off condition 0.5 W

Sound

Speakers 22 mm × 90 mm × 2 pcs
Audio Output 10 W [5 W + 5 W] (10 % THD)

LCD Display panel 50-inch VA panel (LED backlight), 16:9 aspect ratio
Screen size 1,095 mm (W) × 616 mm (H) × 1,257 mm (diagonal)

(No. of pixels) 2,073,600 (1,920 (W) × 1,080 (H))

[5,760 × 1,080 dots]

Operating condition

Temperature 0 °C - 40 °C
Humidity 20 % - 80 %

Applicable signals

Scanning format

PC signals VGA, SVGA, XGA, SXGA

Connection terminals

HDMI TYPE A Connector
DVI-D IN DVI-D 24 Pin Compliance with DVI Revision 1.0

AUDIO Stereo mini jack (M3) × 1 0.5 Vrms, Shared with PC IN

PC IN High-Density Mini D-sub 15 Pin G with sync 1.0 Vp-p (75 Ω)

AUDIO Stereo mini jack (M3) × 1 0.5 Vrms, Shared with DVI-D IN

LAN

SERIAL IN External Control Terminal

AUDIO OUT Stereo mini jack (M3) × 1 0.5 Vrms

Accessories Supply

Remote Control Transmitter N2QAYB000691
Batteries R6 Size × 2
Cable tie TMM17499 × 2
Ferrite core J0KG00000014 × 2

Dimensions (W × H × D) 1,121 mm × 655 mm × 49 mm
Mass (weight) approx. 18.0 kg
Note:

• Design and specifications are subject to change without notice. Mass and dimensions shown are approximate.

525 (480) / 60i 60p, 625 (575) / 50i 50p, 750 (720) / 60p 50p, 1125 (1080) /

60i 60p 50i 50p 24p 25p 30p 24sF

UXGA ..... (compressed)

Horizontal scanning frequency 30 - 110 kHz
Vertical scanning frequency 48 - 120 Hz

Content Protection Compatible with HDCP 1.1

G without sync 0.7 Vp-p (75 Ω)
B: 0.7 Vp-p (75 Ω)
R: 0.7 Vp-p (75 Ω)
HD / VD:1.0 - 5.0 Vp-p (high impedance)

RJ45 10BASE-T/100BASE-TX, compatible with PJLink

D-sub 9 Pin RS-232C compatible

Output level: Variable (- — 0 dB)

TM

[INPUT 1 kHz / 0 dB, 10 kΩ Load]

8

5 Service Mode

5.1. CAT (Computer Aided Test) mode

TH-50LFE6W

How to access the CAT mode.
Method A Main unit + remote control operation

Press and hold the button on the right side of the unit and press the RECALL button on the remote control 3 times quickly
within 2 second, this will place the unit into the CAT mode.

Method B Remote control operation only

1. Set the OFF timer except for [0] minute by OFF TIMER button. (30 minutes, 60minutes, 90 minutes)

2. Set the volume level of sound to 0 by VOL down button / -button.

3. Press the RECALL button more than 3 seconds before a volume display disappears.

To exit the CAT mode, turn the power off by the main unit or a remote control.

5.1.1. IIC mode

Select the IIC mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on
the remote control.

Subject and item are mentioned on “IIC mode structure”.
To exit the IIC mode, press the R button on the remote control.

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TH-50LFE6W

5.1.2. CD mode

Select the CD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.

Memory data change

To exit the CD mode, press the R button on the remote control.

About the serial number display

As for the serial number of A-module for repair, a dummy value is displayed.
* By the set for which A-module was exchanged, a serial number is displayed as [-----].

About the history display of SOS for the power supply system

• This unit adds the history display (5 times) of power supply failure to the CD mode as PTCT.

• By the self check of a signal system, only one history is displayed (After a self check disappears). But PTCT displays 5 times of
histories (Abnormality of the latest 3 times, first time and second time after shipment) and after a self check does not disappear.
You can see a detailed history of power failure sometimes.

* About the display contents of PTCT

PTCT : The position of [05] is the first time after shipment.
PTCT : The position of [04] is the second time after shipment.
PTCT : The position of [03] is second from last time.
PTCT : The position of [02] is last time.
PTCT : The position of [01] is the latest.

In [Contents & Check point] of [6.1.2. Power LED Blinking timing chart], the two-digit following PTCT are displayed by a hexadeci­mal number.

Blinking times Contents & Check point Display contents
ex.1 2 times PTCT 02 H 09 02
ex.2 9 times PTCT 09 H 09 09

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TH-50LFE6W

5.1.3. SD mode

Select the SD mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button on
the remote control.

To exit the SD mode, press the R button on the remote control.

5.1.4. MS mode

Select the MS mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.

To exit the MS mode, press the R button on the remote control.

Caution:

Market Select should be set after exchange of A-Board.

Destination number

Number Model (Destination)

0 42/50LFE6J (Japan)
1 42/50LFE6U (North America)
2 42/50LFE6E (Europe)
3 42/50LFE6W (Asia, Oceania, ME, Africa)

18 42/50LFE6C (China)

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5.1.5. NW mode

Note :

To use the network function, set each "Network Setup" setting and make sure to set the "Control I/F Select" to "LAN".

Select the NW mode by Up/Down button on the remote control at the front page of CAT mode and then press the Action button
on the remote control.

To exit the NW mode, press the R button on the remote control.

5.1.6. ID mode

Select the ID mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button on
the remote control more than 3 seconds.

To exit the ID mode, press the R button on the remote control.

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5.2. IIC mode structure (following items value is sample data)

TH-50LFE6W

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TH-50LFE6W

6 Troubleshooting Guide

6.1. Self Check

6.1.1. Display Indication

1. Self-check is used to automatically check the bus line controlled circuit of the LCD display.

2. To get into the Self-check mode, press the volume down button on the right side of the unit, at the same time pressing the

OFF-TIMER button on the remote control, and the screen will show.

Method A Self-check only (A shipment setup is not carried out).

• Select the ID mode by Up/Down button on the remote control at the front page of CAT mode and then press the Mute button
on the remote control more than 3 seconds.

Method B Self-check+Shipment setup

• Press and hold the button on the right side of the unit and press the OFF-TIMER button on the remote control.

If the IIC ports have been checked and found to be incorrect
Or not located then “ - - ” will appear in place of “ OK ”
“ 02 ” in the line of the “ PTCT ” means the number of blinks of the Power LED is 2. (Reference to 6.1.2)
“ H09 ” in the line of the “ PTCT ” is the error code.

To exit the CAT mode switch off the main power.

Note:

The line of the “ PTCT ” displays when you get into the Self-check mode for the first time only after the Power LED blinks.

6.1.2. Power LED Blinking timing chart

1. Subject

Information of LED Blinking timing chart.

2. Contents

When an abnormality has occurred to the unit, the protection circuit operates and resets to the stand by mode. At this time,
the defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.

* Refer to 6.1.1 Display Indication

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6.1.3. LCD Panel test mode

The failure-diagnosis by LCD Panel test mode

To find the possible failure point where in LCD Panel or Printed Circuit Board when the
abnormal picture is displayed.

[How to display the test pattern]

(1) Main unit + remote control operation

1. While pressing [VOLUME ( - )] button of the main unit, press [R] button of the
remote control three times within 2 seconds.

2. Test pattern is displayed and Power LED lights red and orange alternately.

How to Exit: Turn off the unit.

(2) Remote control operation only

1. Press [Recall] button of the remote control.

2. Press [R] button of the remote control.

3. Press [N] button of the remote control for over 3 seconds.

4. Test pattern is displayed and Power LED lights red and orange alternately.

TH-50LFE6W

How to Exit: The unit automatically turns off after around 10 seconds.

[Display pattern]

It is unfixed from which color it starts.

White Magenta Yellow Cyan Black

[Test pattern output image]

A-Board

IC

Input
switching

Video signal processing
IP conversion
OSD synthesis

FR-Board

IC

Double­speed
processing

LCD Panel

T-CON

Test pattern

LCD

Test pattern

Output test pattern from A-Board

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[Diagnostic flow chart]

Is a test pattern
displayed normally?

Yes
It displays.

Failure of A-Board

No
It is still abnormal.

Is a part abnormal
even in a test pattern?

Vertical line/
Vertical bar

No
This is not an abnormality
of part

࡮Is the whole abnormal
even in a test pattern?
or
࡮A test pattern is not
displayed but is the state
of LED blink of red and
orange?

Vertical line/
Vertical bar

Yes
It is abnormal.

Horizontal line/
Horizontal bar

Failure of LCD Panel
(rarely failure of A-Board or FR-Board)

Yes
It is abnormal.

Yes
It is blinking.

An image is
not displayed.

If "FRAME CREATION" of
"PICTURE" in On-Screen
Menu is set to "OFF", does
symptom disappear?

Color
unevenness

No
It is still abnormal.

If "FRAME CREATION" of
"PICTURE" in On-Screen
Menu is set to "OFF", does
symptom disappear?

No
It is still abnormal.

Yes
It disappears.

Failure of FR-Board

Yes
It disappears.

Failure of FR-Board

No

- The whole is not abnormal.

- It is not blinking.

A test pattern is not
displayed but is the state
of LED green lighting?

LED blinking

Failure of A-Board or LCD Panel
(rarely failure of FR-Board)

Yes
It is green lighting.

Failure of A-Board

An image is
not displayed.

 Please refer to the next page for "FRAME CREATION".

LED lighting

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[Reference: FRAME CREATION]

FRAME CREATION is the function to double the number of display segments of an image and
to show a fast moving scene more finely.

TH-50LFE6W

FRAME CREATION

MAX

OFF :Please select "OFF", when an image is unnatural.
MIN
MIDDLE
MAX

"FRAME CREATION" setting is a setting of intermediate frame generation when
carrying out double-speed processing (from 60 to 120 frames).
Even if it sets to "OFF", it is not a function which becomes uniform processing.

-

The mode is memorized per input terminal.

-

Even if “NORMALIZE” is selected, the NORMAL setting will not be restored.

-

The picture and menu will disappear for a moment if you switch the mode to OFF, or

switch from OFF to another mode.

Setting procedure and Diagnosis when the failure-diagnosis

[1] Press [PICTURE] button of the remote control, and display "PICTURE" menu screen.
[2] Change the item of "FRAME CREATION" into "OFF".
Please check the symptoms when it is changed to "OFF".

When changing to "OFF", the normal screen is displayed: Failure of FR-Board

“PICTURE” menu screen

PICTURE

NORMALIZE

PICTURE MENU
BACKLIGHT
PICTURE
BRIGHTNESS
SHARPNESS
COLOR TEMP

ADVANCED SETTINGS

FRAME CREATION

NORMAL

STANDARD

100

70
50
50

NORMAL

MAX

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6.2. No Power

First check point
There are following 3 states of No Power indication by power LED.

1. No lit.

2. Green is lit then turns red blinking a few seconds later.

3. Only red is lit.

6.3. No Picture

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7 Disassembly and Assembly Instructions

7.1. PCB Layout

TH-50LFE6W

7.2. Preparation

Please pull soft cloth etc. not to damage a screen and please
turn the front of a main part down and lay it down

7.3. About disassembly and replacement

Cautions when replacing each component

• When you replace each component, please be sure to carry
out according to the following procedure.

• When you attach each module, please do not bolt a screw
strongly.

• The part without the statement of tightening torque, please
tighten a screw 50 - 70 [N cm].

• To disassemble P.C.B., wait for 1 minute after power was off
for discharge from electrolysis capacitors.

• When tightening a screw, retention structures are required
not to deform the LCD Panel.

• Please remove a clamper and a wire processing tape if
needed in the repaire.

• Hold the specified parts to stand the monitor up. (Prevent

from the curvature and deformation of a set)

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7.4. Back Cover removal

1. Remove the screws, and then remove the Back Cover.

7.5. A-Board replacement

1. Disconnect the connectors and remove the screws.

Cautions when replacing the Back Cover

• When replacing the Back Cover, please be sure to stick
the Adjutment Sheet.

2. Remove the screws, and then remove the A-Board from
the Terminal Metal.

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Caution when replacing the A-Board

• Gaskets are enclosed in the A-Board for repaire. Please
stick the gaskets on the position of the following figure
when replacing the A-Board.

Caution after replacing the A-Board

• Since the electronic switch is adopted as a power switch
of main unit, how the rise of the power of the initial state
is different from the case of a mechanical switch in the
past.

• After replacing the A-Board, it will be in an initial state.
When you connect the AC code to a wall outlet, a power
supply state turns into a standby state, and it can turn on
the power supply of the main unit by pressing the power
button on the remote control.
* Please note that a main power supply will be in an OFF
state if a power button of main unit is pressed after con­necting the AC code to a wall outlet.
Please press a power button of main unit again and turn
on the main unit.
(Since the power supply state is saved in EEPROM of A­Board, when remove/insert an AC plug, it start in the last
state after an initial state.)

7.6. P-Board replacement

1. Disconnect the connectors and remove the screws, and
then remove the P-Board.

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Caution when replacing the P-Board

• Felt is enclosed in the P-Board for repaire. Please stick
the felt on the original position when replacing the P­Board.

7.8. GK-Board and Key Button Bracket replacement

1. Disconnect the connector and remove the screw, and
then remove the GK-Board and Key Button Bracket.

7.7. FR-Board replacement

1. Disconnect the connectors and remove the screws, and
then remove the FR-Board .

Cautions when removing/attaching the GK-Board

• When removing the GK-Board from the Key Button
Bracket, please remove it carefully to five hooks.

• The hooks are locked certainly when assembling.

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7.9. Speaker Unit L/R replacement

1. Disconnect the speaker terminal, and then remove the
Speaker Unit L/R.

7.10. K-Board, LED Panel and LED Panel Case replacement

1. Disconnect the connector, and remove the K-Board, LED
Panel and LED Panel Case.

7.11. Rear Panel BTM Assy replace­ment

1. Remove the Speaker Unit L/R.
(Refer to “7.9. Speaker Unit L/R replacement”)

2. Remove the LED Panel Case.
(Refer to “7.10. K-Board, LED Panel and LED Panel Case
replacement”)

3. Remove the screws, and then remove the Rear Panel
BTM Assy.

7.12. Rear Panel Top/L/R Assy replacement

1. Remove the Speaker Unit L/R.
(Refer to “7.9. Speaker Unit L/R replacement”)

2. Remove the LED Panel Case.
(Refer to “7.10. K-Board, LED Panel and LED Panel Case
replacement”)

3. Remove the Rear Panel BTM Assy.
(Refer to “7.11. Rear Panel BTM Assy replacement”)

4. Remove the screws, and then remove the Rear Panel
Top/L/R Assy.

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Caution when reolacing the Rear Panel L/R Assy

• Felt is enclosed in the Rear Panel L Assy and Rear
Panel R Assy for repaire. Please stick the felt on the
position of the following figure when replacing the Rear
Panel L Assy or Rear Panel R Assy.

Caution when attaching the Rear Panel Top/L/R Assy

• As shown in the following figure, please insert the part of
A correctly.
Please tighten a screw, pressing down Rear Panel L/R
Assy and Rear Panel Top Assy by hand and fixing.

7.13. Rear Panel Metal Bot L/R replacement

1. Remove the Speaker Unit L/R.
(Refer to “7.9. Speaker Unit L/R replacement”)

2. Remove the LED Panel Case.
(Refer to “7.10. K-Board, LED Panel and LED Panel Case
replacement”)

3. Remove the Rear Panel BTM Assy.
(Refer to “7.11. Rear Panel BTM Assy replacement”)

4. Remove the Rear Panel L/R Assy.
(Refer to “7.12. Rear Panel Top/L/R Assy replacement”)

• When removing the Rear Panel Metal Bot L, remove

the Rear Panel L Assy.

• When removing the Rear Panel Metal Bot R, remove

the Rear Panel R Assy.

5. Remove the screws, and then remove the Rear Panel
Metal Bot L/R.

Caution when attaching the Rear Panel Metal Bot L/R

• Please check that the hooks (positioning) of metals are
inserted firmly when assembling.

7.14. Metal Bracket Bottom replace­ment

1. Remove the Speaker Unit L/R.
(Refer to “7.9. Speaker Unit L/R replacement”)

2. Remove the LED Panel Case.
(Refer to “7.10. K-Board, LED Panel and LED Panel Case
replacement”)

3. Remove the Rear Panel BTM Assy.
(Refer to “7.11. Rear Panel BTM Assy replacement”)

4. Remove the Rear Panel L/R Assy.
(Refer to “7.12. Rear Panel Top/L/R Assy replacement”)

5. Remove the Rear Panel Metal Bot L/R.
(Refer to “7.13. Rear Panel Metal L/R replacement”)

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6. Remove the screws, and then remove the Metal Bracket
Bottom.

Caution when replacing the Metal Bracket Bottom

• Please stick the gaskets and PET+AL Tapes on the posi­tion of the following figure when replacing the Metal
Bracket Bottom.

7.15. Rear Panel Metal Top/L/R replacement

1. Remove the Speaker Unit L/R.
(Refer to “7.9. Speaker Unit L/R replacement”)

2. Remove the LED Panel Case.
(Refer to “7.10. K-Board, LED Panel and LED Panel Case
replacement”)

3. Remove the Rear Panel BTM Assy.
(Refer to “7.11. Rear Panel BTM Assy replacement”)

4. Remove the Rear Panel Top/L/R Assy.
(Refer to “7.12. Rear Panel Top/L/R Assy replacement”)

5. Remove the Rear Panel Metal Bot L/R.
(Refer to “7.13. Rear Panel Metal Bot L/R replacement”)

• When removing the Rear Panel Metal L, remove the

Rear Panel Metal Bot L.

• When removing the Rear Panel Metal R, remove the

Rear Panel Metal Bot R.

6. Remove the screws, and then remove the Rear Panel
Metal Top/L/R.

25

TH-50LFE6W

Caution when attaching the Rear Panel Metal Top/L/R

• Please check that the hooks (positioning) of metals are
inserted firmly when assembling.

11. Remove the Rear Panel Metal Top/L/R.
(Refer to “7.15. Rear Panel Metal Top/L/R replacement”)

12. Remove the screws, and then remove the FR PCB Fixing
Metal.

Cautions when replacing the FR PCB Fixing Metal

• Please tighten a screw so that the clearance between FR
PCB Fixing Metal and LCD Panel is set to 1.0 mm.

7.16. LCD Panel replacement

Caution about the sticking parts of LCD Panel

• The sticking parts for LCD Panel are enclosed.
When replacing the LCD Panel, please replace the sticking
parts simultaneously.

* Attachment specifications are subject to change with­out notice and parts may remain.
* Please stick on the same place as before.

Cautions about replacing the LCD Panel

• Please be sure to remove metal fittings and a clampers and
to attach them to the LCD Panel for repair. (Please check a
wiring diagram)

1. Remove the A-Board.

(Refer to “7.5. A-Board replacement”)

2. Remove the P-Board.

(Refer to “7.6. P-Board replacement”)

3. Remove the FR-Board.

(Refer to “7.7. FR-Board replacement”)

4. Remove the Key Button Bracket.

(Refer to “7.8. GK-Board and Key Button Bracket replace­ment”)

5. Remove the Speaker Unit L/R.

(Refer to “7.9. Speaker Unit L/R replacement”)

6. Remove the LED Panel Case.

(Refer to “7.10. K-Board, LED Panel and LED Panel Case
replacement”)

7. Remove the Rear Panel BTM Assy.

(Refer to “7.11. Rear Panel BTM Assy replacement”)

8. Remove the Rear Panel Top/L/R Assy.

(Refer to “7.12. Rear Panel Top/L/R Assy replacement”)

9. Remove the Rear Panel Metal Bot L/R.

(Refer to “7.13. Rear Panel Metal Bot L/R replacement”)

10. Remove the Metal Bracket Bottom.
(Refer to “7.14. Metal Bracket Bottom replacement”)

13. Remove the Barrier P PCB and GK Barrier Sheet.

14. Remove the flexible cable, connector and tape, and then
replace the LCD Panel.

26

Caution when replacing the LCD Panel

• Please stick the Model Name Sheet on the position of the
following figure when replacing the LCD Panel.

About the wire arrangement after replacing the LCD Panel

• Please refer to the “Wiring Connection Diagram”.

TH-50LFE6W

Precaution when connecting the LVDS FFC

• Please insert the LVDS FFC firmly to the back.
The shortage of plugs causes failure.

27

TH-50LFE6W

7.17. Caution about the sticking parts of LCD Panel

• Please remove the Barrier P PCB and GK Barrier Sheet from the old LCD Panel and stick it on the new LCD Panel for repair.

28

• Please stick the tapes according to the sticking position of the LCD Panel for repair after connecting the LVDS FFC.

* Attachment specifications are subject to change without notice and parts may remain.
* Please stick on the same place as before.

(Please refer to the "Wiring Connection Diagram".)

TH-50LFE6W

29

TH-50LFE6W

30

8 Block Diagram

8.1. Diagram Notes

TH-50LFE6W

31

TH-50LFE6W

8.2. Main Block Diagram

A

DIGITAL CORE SIGNAL PROCESSOR

LAN TERMINAL

LAN DATA

EEPROM

MII DATA

POWER LINE

VIDEO LINE

AUDIO LINE

LAN
CONTROL

NETWORK
CONTROL

FLASH
MEMORY

REMOTE IN

C.A.T.S. SENSOR

DCDC

1.8V

LED_R

LED_G

K

LAN3.3V

LDO

3.3V

POWER LED
REMOTE RECEIVER
C.A.T.S. SENSOR

STB+5V/D3.3V

PWR5V

RS232C IN

K10

PC/DVI
AUDIO IN

A10

DVI

HDMI

PC

PC/DVI

R,G,B-PC

HD,VD-PC

L,R

RXD/TXD

STB+5V/D3.3V

PC/DVI AUDIO IN

STB3.3V_SW

D3.3V

D1.2V

RTC

UART SW

(LAN OR RS232C)

REMOTE

POWER LED_R

POWER LED_G

C.A.T.S.

MAIN CPU

+3.3V

+1.2V

SUB CPU

RTC_INT

RXD/TXD

UART_SW

REMOTE IN

LED_R

LED_G

C.A.T.S. SENSOR

AUDIO
PROCESSOR

VIDEO
PROCESSOR

(LED:2TIMES)

(LED:13TIMES)

PNL12V_SOS

(LED:4TIMES)

SOUND_SOS

(LED:1TIMES)

MUTE

+1.8V

LVDS

PWR_SOS

REG_SOS

BL_SOS

BL_ON

PWM1

KEY

SOUND15V

SOS DET

FRC_DONE

OEBLK

AUDIO

SERIAL AUDIO SIGNAL

+9V

LINE AMP
L/R

FLASH
MEMORY

DDR2

STB5V

+5V

PWR_SOS

(LED:2TIMES)

REG_SOS

(LED:13TIMES)

PNL12V_SOS

(LED:4TIMES)

5VD_POWER

P15V_24V_EN

DDR1.8V

MAIN_EN

LINE_OFF

P24_EN

BL_SOS

D3.3V

+9V

PANEL12V

POWER_ON

LINE_OFF

PWR5V

PWR15V

D3.3V

LAN3.3V

DDR1.8V

AMP

R

L

R+/-

L+/-

SPEAKER(R)

A13

SPEAKER(L)

LINE OUT

P

AC CORD

POWER SUPPLY

INPUT
FILTER

NEUTRAL

LIVE

JK7101

PFC

AC
DETECT

LLC
CONVERTER

PWR15V

5VD_POWER

PWR15V

P15V

DCDC

PWR5V

LINE_OFF

LINE_OFF

SUB_ON

A2

BL_SOS

P2

GK4

GK

SWITCH

P15V

POWER SW

CONTROL PANEL KEY

16V

24V

BL_PWM

BL_ON

KEY

POWER_ON

P15V24V_EN

PWR15V

MAIN_EN

BL_SOS

BL_PWM

BL_ON

POWER_ON

KEY

DCDC

PNL12V

DCDC

SOUND15V

DCDC

STB5V

PWR5V

SOUND15V

STB5V

D5V

LDO

9V

DCDC

D3.3V

DCDC

DDR1.8V

DCDC

D1.2V

+9V

D3.3V

DDR1.8V

D1.2V

PANEL12V

D5V

TC11

PIXEL WORKS

TC01

PANEL
CONTROL

PANEL

BACK LIGHT

LVDS DATA

A3

FR

DOUBLE SPEED PROCESSOR

TC02

LCD PANEL

P4

32

8.3. Block (1 of 3) Diagram

TH-50LFE6W

LAN TERMINAL

F7101

JK7101

AC CORD

JK2701

P

POWER SUPPLY

**

LINE
FILTER

NO

HOLDER

1

2

A

DIGITAL SIGNAL PROCESSOR

LAN
DATA

LAN3.3V

D7106

RECTIFIER

CF7103
CF7104

LF7103
LF7104
LF7105

IC2701

LAN CONTROL

+3.3V

IC2706

EEPROM

WP

VCC

IC7201

T7201,
Q7201

PFC

CLK

MII_TXD/
MII_RXD

RESET

SDA/
SCL

IC7301

LLC
CONVERTER

KEY,Power SW

GK

CONTROL PANEL KEY

CONTROL IIC

AC
DETECT

SW2851-2855

POWER SW

Q7301,
Q7302

SW2857

25MHZ

MII DATA

PC7301

PC7302

PC7303

X2701

25MHZ

HOT

T7301

PHOTO
COUPLER

PHOTO
COUPLER

PHOTO
COUPLER

GK4

2

3

IC2704

MII_MDC

MII_TXD
MII_RXD

RESET

IIC_IF

COLD

P4

D7408,9

D7401,2

12

10/100
EtherMAC
w/FIFO

+1.8V

NETWORK
CONTROLER

IC7401

TXD1

UART

RXD1

IC2703

+1.8V

POWER LED

K

REMOTE RECEIVER
C.A.T.S. SENSOR

ERROR
DETCT

+24V

+24V

8

11

9

+24V

7

+3.3V

4

3

Q7402
Q7405

1

Q2706

Q7401

SPIO_SS

SPIO_MISO

SPIO_MOSI

SPIO_SCLK

RM2800

REMOTE
RECEIVER

SN2800

C.A.T.S.
SENSOR

D2802

IC2705

SPI
FLUSH
MEMORY

REMOTE

G

R

POWER LED

PA7402

SUB_ON

KEY

POWER_ON

LINE_OFF

BL_SOS

BL_ON

BL_PWM

IC2708

EDID_WP
(IC4501)

DVI_DET

SHORT SOS

STB5V_SW

HDMI_DET

Q4094

PNL12V_SOS

JK3505

PC/DVI
AUDIO IN

PC/DVI_R

(LED 4TIMES)

PC/DVI_L

(LED 13TIMES)

REG_SOS

1

2

3

4

5

6

7

8

9

10

11

12

RS232C

DRIVER

RXD_232C

TXD_232C

JK3503

SPI_CS

SPI_SO

SPI_SI

SPI_SCK

LAN3.3V

Q2719

5V->3.3V

IC2709

Q2714,15

Q2716

RXD_LAN

TXD_LAN

SPI_LAN_WP

SPI_CS_LAN

SPI_SO_LAN

SPI_SI_LAN

SPI_SCLK_LAN

SPI_LAN_SW

NT_RST

Q2717,18

RXD_PC

TXD_PC

VCC

RS232C_IN
(SEIRIAL IN)

IC3504

IC4806

+3.3V

Q4129

Q4128

LAN3.3V_ON/OFF

LIGHT_DET

STB5V_SW

KEY_MUTE

KEY_LOCK

IR_IN

LED_G

LED_R

LAN3.3V_ON/OFF

D3.3V

A10

1

6

7

4

5

3

K10

REMOTE

1

G_LED_ON

6

R_LED_ON

7

C.A.T.S

4

STB5V_SW

5

3

LAN3.3V

STB5V

IC5201

+5V

P2

+16V

1

+16V

2

+16V

3

SUB_ON

8

KEY

10

POWER_ON

9

LINE_OFF

6

BL_SOS

11

BL_ON

12

PWM1

13

PWM1

BL_ON

STATUS

A2

D5V

1

3

5

LINE_OFF

BL_SOS

BLON_EN

KEY0

PWM1

5VD_POWER

MAIN_EN

Q5102

PWR5V

IC5102

+5V

P5V_EN

CONTROL

2

6

4

11

8

10

12

Q5201

BACK LIGHT

INVERTER

24V

CIRCUIT

P15V_24V_EN

KEY_POWER

Q4030

PANEL

Q4138

Q4602

Q5101

PWR5V

IC4904

PANEL

3

2

TXD

RXD

PWR15V

D4165

12VPAN_EN

JK4002

DVI-D IN

TMDS DATA CLOCK

IC4901

(SHORT SOS)

+12V

DDC IIC

PWR5V SOS

PANEL12V

DVI_5V

DVI_HPD

D+3.3V

+3.3V

IC4712

HDMI_I2C

D3.3V

IC4905

JK4004

HDMI IN1

DDC IIC

HDMI_5V

HDMI_HPD

HDMI DATA CLOCK

SHORT SOS

9V

PANEL12V

Q4300

Q4301

Q4088

IC4703

EEPROM

IC4706

EEPROM

HDMI_I2C

PWR_SOS

(LED 2TIMES)

IC4711

PWR5V

HDMI/DVI_SW

"L": IC4711 ON

Q4711

PWR5V

D4169

9V

Q4380,4100

SHORT SOS

D5V

D4187

Q4091,93

Q4087

D4161,64

D4400

OVP DET

PWM5V

DDR1.8V

STB5V_SW

D4174,4402

D4401

Q4024

Q4019

D5V

Q4099

33

LCD PANEL

TH-50LFE6W

8.4. Block (2 of 3) Diagram

JK4001

PC

PC-R

PC-G

PC-B

V_SYNC

H_SYNC

3V_RXD3

3V_TXD3

IC4714

IC4715

VGA_-G/Y

VGA_B/PB

VGA_R/PR

1

PWR5V

2

3

4

5

IC4906

6

7

8

9

3.3V

D5V

IC4903

IC4902

10

DDR1.8V

D1.2V

STB3.3V_SW

D3.3V

D1.2V

+1.2V

DDR1.8V

+1.8V

VGA_SCL

VGA_SDA

PC_V_DET

PC_H_DET

STB5V_SW

TXD_PC

TXD_LAN

RXD_PC

RXD_LAN

X3120

PC_V_DET

PC_H_DET

LAN OR RS232C

Q2713

IC4702

EEPROM

IC4502,03

ANALOG VIDEO DATA

(R/G/B/H/V )

IC3120

REAL
TIME
CLOCK

IC2707

UART SW

3.3V

VGA_5V

Q4132

PC_DVI_L/R

DDR2

5V_I2C1

Q3120,Q3121

X4801

20MHz

Q2707

Q2712

A

DIGITAL SIGNAL PROCESSOR

IC4501

EDID_WP

DDR_SDRAM

I/F

MUX

+1.2V

+1.8V

+3.3V

AUD3.3V

MUX

HDMI/DVI_SW

HDMI_I2C

DVI_HPD

HDMI_HPD

DVI_DET

HDMI_DET

3V_RXD3

3V_TXD3

H_SYNC

V_SYNC

IC4801

RTC_INT

PC_V_DET

PC_H_DET

STB+5V

UART_SW

TXD0

Q4802

RXD0

LED_R

MAIN CPU

Analog
Capture

SUB CPU

R_LED_ON

LED_G

INPUTS

DVI/
HDMI

G_LED_ON

Q4801

SOUND15V

I2C2

RC

Q4805

Q4806

IIC2

Q4106
Q4109

I2C
5V->3V

Q4766

VCC

VCC

IC4763

SPI_CS_LAN

IC5202

5V_I2C1

Q4058

IC4761

Q4762

SPI_SW2

Q4105

Q4114

UART SW

5V->3.3V

UART SW

3.3V->5V

CS_FL

SPI_DI_S

SPI_DO_S

CLK2

SPI_SI_LAN

SPI_SO_LAN

SPI_SCLK_LAN

IC4506

TEMP SENSOR

+15V

SERIAL AUDIO SIGNAL

IC4504

EEPROM

CS#

SPI_DI

SPI_DO

SPI_CLK

SPI_SW

Q4130,31

IC4762

5V<->3.3V

Q4765

Q4763

X4004

19.6608MHz

CLOCK
GENARATION

AUDIO
PROCESSOR

DSP

AUDIO

A/D

3D VIDEO
DECORDER

TO JK3503

REMOTE

RXD0

5V_RXD

5V_TXD

TXD0

STB5V_SW

MUX

MUX

MUX

SUB_MAIN

SPI_LAN_WP

SPI_LAN_SW

LAN3.3V_ON/OFF

MOTION DETECTION

DCDI MOTION
ADAPTIVE
De-interlacing
Scaling
Shaping Filtter

MAIN_SUB2

NT_RST

POWER KEY_LOCK

KEY_POWER

P5V_EN

MEMORY
CONTROLER

VIDEO
PROCESSOR

5VD_POWER

MAIN_ON

P15V_24V_EN

2nd Channel
Processing

Enhancer ADCII
ACM-3D
3x3 Matrix
OSD Blend

SOUND_SOS

LINE_OFF

3x3
Matrix

(LED:4TIMES)

(LED:1TIMES)

BL_SOS

PNL12V_SOS

OSD
CONTROLER

(LED:13TIMES)

(LED:2TIMES)

PWR_SOS

REG_SOS

SPI_SW2

D/A

I2C_CONT

C.A.T.S_SENSOR

Q4112

IR_IN

RXD_PC

TXD_PC

Q4116

LAN3.3V_ON/OFF

SPI_LAN_WP

SPI_LAN_SW

NT_RST

P5V_EN

KEY_POWER

KEY_LOCK

5VD_POWER

MAIN_EN

P15V_24V_EN

LINE_OFF

SOUND_SOS

BL_SOS

PNL12V_SOS

PWR_SOS

REG_SOS

I2C_CONT

SPI_SW2

I2C_INT

AMP_STBY

SP_MUTE

BUS
CONTROL

SERIAL
I/F

OUTPUT
Formater

LVDS
Tx

LINE_OFF

KEYSCAN

IIC_CONT

12VPAN_EN

FRC_DONE

FLASH_WP_SUB

I2C_INT

FLASH_WP_SUB

MUTE

PWM1

BL_ON

FRC_XRST

OEBLK

3V_TXD1

3V_RXD1

5V_TXD1

5V_RXD1

WP_SUB

SERIAL
I/F

CS_FL

5V_I2C1

PWR15V

OUT_R/L

3V_I2C1

WP_MAIN

RC

SOUND15V

IC2001

LINE AMP

PWR5V

Q4057

FLASH_WP_SUB

IC4505

PWM1

BLON_EN

LINE_OFF

KEY0

LIGHT_DET

IR_IN

IIC_CONT

12VPAN_EN

FRC_DONE

FRC_XRST

OEBLK

SPI_SW2

SP_MUTE

SLEEPN

9V

Q4118

SERIAL
FLASH

KEY_MUTE

WP_SUB

Q4764

CS#

SO/SI01

SI/SI00

SCLK

Q4125

SPI_SW2

IC5103

AUDIO
OUT

AUDIO AMP

IC2002

SPI_SW

D3.3V

SPI_SW

Q2042

STB5V

SOUND_SOS(IC4801)

LINE MUTE

Q2052

Q2054

Q2051

Q4761

12VPAN_EN

IIC2

Q2053

PANEL12V

D5V

LVDS DATA

FRC_DONE

FRS_XRST

OEBLK

IC4509

R(+)

R(-)

L(-)

L(+)

SPI_SW

D3.3V

5V_I2C1

5V_I2C2

I2C_INT

I2C_CONT

STB5V

STB5V

R OUT

L OUT

MODE

RESET

A13

1

2

3

4

A3

1

9

11

13

19

47

51

52

58

54

55

JK3506

LINE OUT

A40

FOR
FACTORY
USE

A48

FOR
FACTORY
USE

TO FR-BOARD
(TC11)

SPEAKER_R

SPEAKER_L

9V

11

12

9V

34

8.5. Block (3 of 3) Diagram

TH-50LFE6W

TO A-BOARD
(A3)

FR

DOUBLE SPEED PROCESSOR

TC11

60

52

50

48

42

14

10

9

5

7

6

PANEL+12V

LVDS DATA

FRC_DONE

FRC_XRST

OEBLK

SUB5V

IC9300

DCDCEN

IC9351

+3.3V

DCDCEN

IC9303

+2.5V

IC9302

+1.8V

FRC_DONE

RESETN

OEBLK

I2C(TCON_12C)

IC9301

+1.0V

PIXCEL WORKS

PNL3.3V

FRC+2.5V

IC9100

(FRC)

FRC+1.0V

FRC+1.8V

SPI I/F

DDR I/F

X9100

LCD PANEL

TC01

PANEL+12V

1

4

11

LVDS DATA

IC9350

SPI
FLASH

40

LCD PANEL

CONTROL

IC9250

DDR

TC02

3

LVDS DATA

32

XIN

XOUT

35

TH-50LFE6W

36

9 Wiring Connection Diagram

9.1. Wiring Connection Diagram

TH-50LFE6W

37

TH-50LFE6W

38