Panasonic TH-55LFV50U Schematic

ORDER NO.ITD1210048CE

B32 Canada: B61

FULL HD LCD Display

Model No. TH-55LFV50U

©Panasonic Corporation 2012.
Unauthorized copying and distribution is a
violation of law.

TABLE OF CONTENTS Page

1 Important Safety Instructions -------------------------------------------------------------------------------- 3

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

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

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

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

4 Specifications ----------------------------------------------------------------------------------------------------- 8

5 Troubleshooting Guide ---------------------------------------------------------------------------------------- 10

5.1 No Power ---------------------------------------------------------------------------------------------------- 10

5.2 Abnormal Display ------------------------------------------------------------------------------------------ 11

5.3 No Display --------------------------------------------------------------------------------------------------- 12

6 Disassembly and Assembly Instructions --------------------------------------------------------------- 13

7 Block Diagram ---------------------------------------------------------------------------------------------------- 21

8 Wiring Connection Diagram --------------------------------------------------------------------------------- 22

8.1. Caution Statement -------------------------------------------------------------------------------------- 22

8.2. Wiring -------------------------------------------------------------------------------------------------------- 22

9 Exploded View and Replacement Parts List ----------------------------------------------------------- 23

9.1. Exploded View -------------------------------------------------------------------------------------------- 23

9.2. Replacement Parts List ---------------------------------------------------------------------------------- 24

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1 Important Safety Instructions

1) Read these instructions.

2) Keep these instructions.

3) Heed all warnings.

4) Follow all instructions.

5) Do not use this apparatus near water.

6) Clean only with dry cloth.

7) Do not block any ventilation openings. Install in accordance with the manufacturer’s instructions.

8) Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including

amplifliers) that produce heat.

9) Do not defeat the safety purpose of the polarized or grounding-type plug. A polarized plug has two blades with

one wider than the other. A grounding type plug has two blades and a third grounding prong. The wide blade or

the third prong are provided for your safety. If the provided plug does not fit into your outlet, consult an electrician

for replacement of the obsolete outlet.

10) Protect the power cord from being walked on or pinched particularly at plugs, convenience receptacles, and the

point where they exit from the apparatus.

11) Only use attachments / accessories specified by the manufacturer.

12) Use only with the cart, stand, tripod, bracket, or table specified by the manufacturer, or sold with the apparatus.

When a cart is used, use caution when moving the cart / apparatus combination to avoid injury from tip-over.

13) Unplug this apparatus during lightning storms or when unused for long periods of time.

14) Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in

any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the

apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been

dropped.

15) To prevent electric shock, ensure the grounding pin on the AC cord power plug is securely connected.

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2 Warning

This LCD Display is for use only with the following optional accessories. Use with any other type of optional

accessories may cause instability which could result in the possibility of injury.

(All of the following accessories are manufactured by Panasonic Corporation.)

• Remote Control Kit.................................... TY-RM50VW

• Cover-frame Kit...................................... TY-CF55VW50

Always be sure to ask a qualified technician to carry out set-up.

Small parts can present choking hazard if accidentally swallowed. Keep small parts away from young children.

Discard unneeded small parts and other objects, including packaging materials and plastic bags/sheets to prevent

them from being played with by young children, creating the potential risk of suffocation.

When using the LCD Display

Do not bring your hands, face or objects close to the ventilation holes of this Display.

• Top of this Display is usually very hot due to the high temperature of exhaust air being released through the

ventilation holes. Burns or personal injuries can happen if any body parts are brought too close. Placing any object

near the top of this Display could also result in heat damages to the object as well as to this Display if its ventilation

holes are blocked.

Be sure to disconnect all cables before moving this Display.

• Moving this Display with its cables attached might damage the cables which, in turn, can cause fire or electric

shock.

Disconnect the power plug from the wall outlet as a safety precaution before carrying out any cleaning.

• Electric shocks can result if this is not done.

Clean the power cable regularly to prevent it from becoming dusty.

• Built-up dust on the power cord plug can increase humidity which might damage the insulation and cause fire.

Unplug the cord from the wall outlet and clean it with a dry cloth.

NOTE:

• Image retention may occur. If you display a still picture for an extended period, the image might remain on the

screen. However, it will disappear after a while

Setup

Do not place this Display on sloped or unstable surfaces, and ensure that this Display does not hang over

the edge of the base.

• The Display may fall off or tip over.

Do not place any objects on top of this Display.

• If water spills onto this Display or foreign objects get inside it, a short-circuit may occur which could result in fire or

electric shock. If any foreign objects get inside this Display, please consult an Authorized Service Center.

Do not cover the ventilation holes.

• Doing so may cause this Display to overheat, which can cause fire or damage to this Display.

Transport only in upright position!

• Transporting the unit with its display panel facing upright or downward may cause damage to the internal circuitry.

For sufficient ventilation;

• Leave a space of 1-31/32” (5cm) or more at the rear.

Cautions for Wall Installation

• Wall installation should be performed by an installation professional. Installing this Display incorrectly may lead to

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an accident that results in death or serious injury. Furthermore, when installing on a wall, a UL standard certified wall

hanging bracket (VESA 400 × 400) must be used.

An apparatus with CLASS I construction shall be connected to a mains socket outlet with a protective ear

thing connection.

AC Power Supply Cord

The Display is designed to operate on 110 - 127 V AC, 50/60 Hz.

Ensure that the mains plug is easily accessible.

Do not use any power supply cord other than that provided with this unit.

• Doing so may cause fire or electric shocks.

Securely insert the power cord plug as far as it will go.

• If the plug is not fully inserted, heat may be generated which could cause fire. If the plug is damaged or the wall

socket plate is loose, they should not be used.

Do not handle the power cord plug with wet hands.

• Doing so may cause electric shocks.

Do not do anything that might damage the power cable. When disconnecting the power cable, hold the plug,

not the cable.

• Do not make any modifications, place heavy objects on, place near hot objects, heat, bend, twist or forcefully pull

the power cable. Doing so may cause damage to the power cable which can cause fire or electric shock. If damage

to the cable is suspected, have it repaired at an Authorized Service Center.

If this Display will not be used for a long period of time, unplug the power cord from the wall outlet.

If problems occur during use

If a problem occurs (such as no picture or no sound), or if smoke or an abnormal odor is detected from this

Display, unplug the power cord immediately.

• Continuous use of this Display under these conditions might cause fire or permanent damage to the unit. Have this

Display evaluated at an Authorized Service Center. Services to this Display by any unauthorized personnel are

strongly discouraged due to its high voltage dangerous nature.

If water or foreign objects get inside this Display, if this Display is dropped, or if the cabinet becomes

damaged, disconnect the power cord plug immediately.

• A short may occur, which could cause fire. Contact an Authorized Service Center for any repairs that need to be

made.

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3 Service Navigation

3.1 Service Hint

Board Name Function Remarks

Main Board

IR Board Remote Receiver, LED

Power Board Power (AC/DC), DC-DC

Key Board Control Button, Power switch

Sensor Board Temperature Sense Controller

IR Connector Board

Power Board

IR Connector Board

Key Board

IR Board

Speaker out, AV Terminal, HDMI in, SD Card,

PC in, Digital Signal Processor, Nile-Tcon, Tuner

Use the remote control can control more than

one TV at the same time

Sensor BOARD

Main Board

All boards are non serviceable

and should be exchanged for

service

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3.2. Applicable signals

VGA Resolution:

SDTV Resolution:

HDTV Resolution:

• The PC text quality is optimum in HD 1080 mode (1920 x 1080, 60Hz).

• Your PC display screen might appear different depending on the manufacture (and your particular version of

Windows).

• Check your PC instruction book for information about connecting your PC to a monitor.

• If a vertical and horizontal frequency-select mode exists, select 60Hz (vertical) and 31.5KHz (horizontal). In some

cases, abnormal signals (such as stripes) might appear on the screen when the PC power is turned off (or if the

PC is disconnected). If so, press the [INPUT] button to enter the video mode. Also, make sure that the PC is

connected.

• When horizontal synchronous signals seem irregular in RGB mode, check PC power saving mode or cable

connections.

• The display settings table complies to the IBM/VESA standards, and based on the analog input.

• The DVI support mode is regarded as same to the PC support mode.

• The best timing for the vertical frequency to each mode is 60Hz.

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4 Specifications

Display

Item Specifications

Screen Size 55” LCD

Active Screen Size 54.64 inches (1387.80 mm) diagonal

Aspect Ratio 16:9

Number of pixels 1920 (H) x 1080 (V)

Pixel Pitch 0.630 (H) x 0.630 (V) [mm], 0.0248 (H) x 0.0248 (V) [inch]

Displayable Colors 10 Bit (D), 1.06 Billion colors

Brightness (typical) 800 CD/m2

Contrast Ratio (typical) 1400:1

Viewing Angle Up 89 / Down 89 / Left 89 / Right 89 ( type ) @ CR > 10

In/Out Terminals:

Item Specifications

Speaker

Output

Audio Input RCA Jack x 2 3.5 mm Stereo

Audio Output RCA Jack x 2 0.5 V [rms] (Normal) / 2 Channel (L+R)

RS232C D-Sub Jack x 2 (9 pin) TXD + RXD (1:1)

RJ-45 RJ-45 Jack x 1 (8 pin) 10/100 LAN Port

HDMI Input HDMI Jack x 1 (Type A) (18

DVI-D Input DVI-D jack MAX: 1920 x 1080 / 60 Hz (WUXGA)

DVI-I Output DVI-I jack Pass-through from DVI-D Input

VGA Input D-Sub Jack x 1 (15 pin) Analog RGB: 0.7 V [p-p] (75 Ω), H/CS/V: TTL (2.2 kΩ), SOG: 1 V

Component

Input

Composite

Input

External Speaker 10 W + 10 W (8 Ω)

0.5 V [rms] (Normal) / 2 Channel (L+R)

x 1

Video : 480i, 480p, 720p, 1080i, 1080p Audio: 32 kHz, 44.1 kHz, 48

pin)

BNC Jack x 3 Y: 1 V [p-p] (75 Ω), Pb: 0.7 V [p-p] (75Ω), Pr: 0.7 V [p-p] (75 Ω)

BNC Jack x 1 (shared with

Component-Y)

kHz / 2 Channel (L+R) Supports LPCM only

[p-p] (75 Ω) MAX: 1920 x 1080 / 60 Hz (WUXGA)

MAX: 480i, 576i, 480p, 576p, 720p, 1080i, 1080p

Video: 1 V [p-p] (75 Ω) MAX: 480i, 576i

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