TH-55LFV50W - Panasonic TV Service Manual (repair manual)

 

 

 

ORDER NO.ITD1211049CE   

 

 

 

 

FULL HD LCD Display 

 
 
 

 

 
 

 

 

 

 

 
 
 
 
 
 
 
 
 
 
 
 

 

 

 

2

 

 
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 

3

 

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.

4

 

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