Panasonic LH-55RM1MX Service Manual
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Panasonic LH-55RM1MX Service Manual

Hd/fhd lcd display. chassis. 5m56m
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This service information is designed for experienced repair technicians only and is not designed for use by the general public.
It dose not contain warnings or cautions to advise non -technical individuals of potential dangers in attempting to service a product.
Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to ser-
vice or repair the product or products dealt with in this service information by anyone else could result in serious injury or death.
There are special components used in this equipment which are important for safety. These parts are marked by 7 in the schematic
diagram, circuit board diagrams, exploded views and replacement parts list. It is essential that these critical parts should be replaced
with manufacturer's specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of
manufacturer.
Model No. LH-55RM1MX
Chassis. 5M56M
WARNING
IMPORTANT SAFETY NOTICE
HD/FHD LCD Display
© Panasonic Corporation 2015. Unauthorized
copying and distribution is a violation of law.

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Summary of Contents for Panasonic LH-55RM1MX

  • Page 1 It is essential that these critical parts should be replaced with manufacturer’s specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of manufacturer. © Panasonic Corporation 2015. Unauthorized copying and distribution is a violation of law.
  • Page 2 PREFACE Table of Contents 1. Safety Precautions 2. Warning 3. Specifications SECTION 1 SERVICE INFORMATION 1. Name of each part 2. Notes on Service 3. Service Mode 4. Troubleshooting Guide SECTION 2 DISASSEMBLY PROCEDURES Preparations 2. Parts Disassembly 3. Replacement of LCD Panel Module SECTION 3 ADJUSTMENTS 1.
  • Page 3 PREFACE 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.
  • Page 4 PREFACE 1.3. 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.
  • Page 5 PREFACE 2. Warning of Electrostatic (ESD) to Electrostatically Sensitive (ES) .Prevention Dischargearge Devic tive Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Elec-trostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor “chip”...
  • Page 6 PREFACE 2.2. About free (PbF) lead solder 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.
  • Page 7 PREFACE 3. Specifications...
  • Page 8 PREFACE...

  • Page 9: Table Of Contents

    SECTION 1 SERVICE INFORMATION Service Information Model No. LH-55RM1MX CONTENTS SECTION 1 SERVICE INFORMATION 1. Name of each part..... INF-2 1.

  • Page 10: Name Of Each Part

    SECTION 1 SERVICE INFORMATION 1. Name of each part 1. 1. Display body INF-2...

  • Page 11: Connecting Terminals

    SECTION 1 SERVICE INFORMATION 1. 2. Connecting terminals INF-3...

  • Page 12: Remote Controls

    SECTION 1 SERVICE INFORMATION 1. 3. Remote controls INF-4...

  • Page 13: Notes On Service

    SECTION 1 SERVICE INFORMATION 2. Notes on Service 2. 1. Before service operation 2. 1. 1. LCD panel module 1. Although an LCD panel module is a product of high-precision technology, some of the pixels on the image may be missing or constantly lit.

  • Page 14: Service Mode

    SECTION 1 SERVICE INFORMATION 3. Service Mode 3. 1. Watching display INF-6...
  • Page 15 SECTION 1 SERVICE INFORMATION INF-7...
  • Page 16 SECTION 1 SERVICE INFORMATION INF-8...
  • Page 17 SECTION 1 SERVICE INFORMATION INF-9...

  • Page 18: Using Media Player

    SECTION 1 SERVICE INFORMATION 3. 2. Using Media Player INF-10...
  • Page 19 SECTION 1 SERVICE INFORMATION INF-11...

  • Page 20: Troubleshooting Guide

    SECTION 1 SERVICE INFORMATION 4. Troubleshooting Guide The failure symptom "Power off" or "No picture or No sound" is reported but it can not be confirmed in the service, use this function to confirm the failure status and narrow down the failure circuit. INF-12...

  • Page 21: Troubleshooting Flow

    SECTION 1 SERVICE INFORMATION 4. 1. Troubleshooting flow 4. 1. 1. No power No power (LED “Off”) Check the AC input and Power “On” the power is “ON”? Power board CN924 Pin Replace the Power board 2/3 output=5.2V? 1. RC can turn on the PD and Key can’t, replace the key board.
  • Page 22 SECTION 1 SERVICE INFORMATION 4. 1. 2. Abnormal display [Note] About the Replacement procedure of LED BAR. Please refer to the Supplement Service Manual INF-13...
  • Page 23 SECTION 1 SERVICE INFORMATION 4. 1. 3. No display [Note] About the Replacement procedure of LED BAR. Please refer to the Supplement Service Manual INF-14...
  • Page 24 SECTION 2 DISASSEMBLY PROCEDURES Disassembly Procedures Model No.LH-55RM1MX CONTENTS SECTION 2 DISASSEMBLY PROCEDURES 1. Preparations..... . DIS-2 2. Parts Disassembly....DIS-3 2.1.

  • Page 25: Preparations

    SECTION 2 DISASSEMBLY PROCEDURES 1. Preparations Note:① The picture is from design model and may not 100 percent match the final end products,but the operating process is the same. Make sure the wiring will remain the same as you ② Open the Monitor set, wrong wiring may cause safety issue. ③...

  • Page 26: Parts Disassembly

    SECTION 2 DISASSEMBLY PROCEDURES 2. Parts Disassembly 2.1 Remove back cover Note:like the picture,remove 15 pcs screws from the red circle position and remove the back cover. 2.2 Tear tapes 2.3 Disconnect cables/remove the IR&Key module Note:the IR&Key module on the position mark by red frame ,there’s no any screws. DIS-3...

  • Page 27: Disassemble The Key Module

    SECTION 2 DISASSEMBLY PROCEDURES 2.4 Disassemble the Key module Note:After separate the Key module ,then will find 3 parts show in the picture. 2.5 Separating the speaker lines & speaker boxes Note:there have 4 speaker rubbers can take down mark by red circles. DIS-4...

  • Page 28: Remove All Screws Of Pcb

    SECTION 2 DISASSEMBLY PROCEDURES 2.6 Remove all screws of PCB Note:Disassemble the main board and power board,Total other Parts: 8 pcs screws、 bottom AV BKT and side AV BKT. DIS-5...

  • Page 29: All Parts Views

    SECTION 2 DISASSEMBLY PROCEDURES 2.7 All parts views Pay attention:here the speaker box with 4 rubbers Specification: ① Panel&FFC cable ② Power supply board ③ Main board ④ Side & Bottom AV BKT ⑤ Back cover ⑥ Speaker box(with rubbers) ⑦...

  • Page 30: Replacement Of Lcd Panel Module

    SECTION 2 DISASSEMBLY PROCEDURES 3. Replacement of LCD Panel Module Attention when removing LCD panel module • Please work by two or more persons. • Please work putting a glove. Caution about LCD panel module • When replacing the LCD panel module, please work to be aware of the following. 3.1.
  • Page 31 SECTION 2 DISASSEMBLY PROCEDURES DIS-8...
  • Page 32 SECTION 2 DISASSEMBLY PROCEDURES DIS-9...
  • Page 33 SECTION 3 ADJUSTMENTS Adjustments Model No. LH-55RM1MX CONTENTS SECTION 3 ADJUSTMENTS 1. Software Update Procedures....ADJ-2 1.1. Upgrade by programming tool 1.2. Upgrade by serial port tool 2.

  • Page 34: Section 3 Adjustments

    SECTION 3 ADJUSTMENTS 1.Software Update Procedures 5M56M applied Mstar solution, there're two way of upgrading software when the mainboard cannt boot correctly, they're programming tool upgrade and serial port upgrade. 1.1. Upgrade by programming tool 1.1.1. Open the “Flypro” ADJ-2 *upgrading by programming tool is the most effecient way of upgrading, which is suitable for dealing with vast number of software failure.But this method requires detaching flash IC from main board, which involves a certain risk, precautious is needed...
  • Page 35 SECTION 3 ADJUSTMENTS 1.1.3. Detect flash IC with programming tool, then load the right software for upgrading * Click "Auto detect device type", select the right category then click "start detect" 1.1.4. Select device type and load upgrade software * Double click the device type which matches the flash IC type on the programming tool, then click "load" to select software you're about to load.

  • Page 36: Upgrade By Serial Port Tool

    SECTION 3 ADJUSTMENTS 1.1.6. Select "Auto" mode then click "Auto start" to start upgrading * Select "Auto" mode then click "Auto start" to start upgrading * "verify successful" signifies upgrade succeeded! 1.2. Upgrade by serial port tool 1.2.1. Open the “ISP TOOL” *Upgrade by serial port is an ineffecient method of upgrading.
  • Page 37 SECTION 3 ADJUSTMENTS 1.2.3. Connect mainboard with computer by serial port tools * Connect AC power to mainboard, click "Connect", if flash IC's type is showed on the screen, connection has succeeded 1.2.4. Read the upgrade software * Click "Read" then click the "Read" icon below to load the upgrade software 1.2.5.

  • Page 38: Software Update By Usb

    SECTION 3 ADJUSTMENTS 1.2.6. Wait till the upgrade procedure complete * Note: Do not launch software such as "secureCRT" etc to print TV information while upgrade with serial port tools, otherwise verify may fail. 2.2. Software Update BY USB 2.1. USB sortwar update ADJ-6...

  • Page 39: How To Catch Log File

    SECTION 3 ADJUSTMENTS 3. How to catch log file 3.1.Steps Connect serial tool between your computer and the VGA interface to TV model 3.1.1. Get port of your COM, you can check the device management of your computer to find port option, refer to bellow picture 3.1.2.
  • Page 40 SECTION 3 ADJUSTMENTS 3.1.4. Select the correct Port above in your computer * Click “Connect”， then you can see log info are printing. 3.1.5. Save log info Open “File” Menu and select “log Session” option to save log file.Remember to save log info before the problem appear ADJ-8...

  • Page 41: Hotel Mode Setting

    SECTION 3 ADJUSTMENTS 4.Hotel Mode Setting 4.1.Entering Hotel Mode Menu Hotel Mode Menu should be shown by the following operation. 4.1.1. Step 1 Press “ MENU ”button once on the Remote Control,While pressing the button, press “ 7906 ” button on the Remote Control. 4.1.2.

  • Page 42: User Manual Of Rs232

    SECTION 3 ADJUSTMENTS Explanation of Hotel Mode : 5. User Manual of RS232 5.1.RS232 Menu should be shown by the following operation. 5.1.1.Step 1 Press “Menu, + 7, 9, 0, 6” to enter into Hotel Mode, “Hotel Mode” and “RS232” should be set to On. ADJ-10...
  • Page 43 SECTION 3 ADJUSTMENTS 5.1.2.Step 2 Install the tool “Docklight”. Register number: 01 01 24210355766,Select the COM Port of debug tool and Setup the software, Press “Run” to Start Communication. 5.1.3.Step 3 The RS232 Line is shown as the picture, Insert the 3.5MM-Audio-Plug to the Earphone-JACK(RS232 port) of Main board,Connect the DB-9 interface to your Control center.
  • Page 44 SECTION 3 ADJUSTMENTS 5.1.4.Step 4 Check “RS232 Control Command” in the excel, Send Command is: 0x02 Control-Code 0x03 0x02 0x03 is HEX Control-Code is ASCII For example: New a send sequence of “Volume up” Double-click here  Set the Name “AUU” and input the Command: ...
  • Page 45 SECTION 3 ADJUSTMENTS Press OK and save the send sequence, then Click Send to send the “Volume up” Command to TV, and receive the  serial message from TV ADJ-13...

  • Page 46: Rs232 Code

    SECTION 3 ADJUSTMENTS 5.2.RS232 CODE ADJ-14...
  • Page 47 SECTION 4 DIAGRAMS Diagrams Model No. LH-55RM1MX CONTENTS SECTION 4 DIAGRAMS 1. Block Diagrams..... . DIA-2 1.1. A module 1.2. P module...
  • Page 48 SECTION 4 DIAGRAMS 1. Block Diagrams 1.1. A module DIA-2...
  • Page 49 SECTION 4 DIAGRAMS 1.2. P module DIA-3...
  • Page 50 SECTION 5 PARTS LIST Exploded Views & Parts List Model No. LH-55RM1MX CONTENTS SECTION 5 PARTS LIST 1. Exploded views ..... . SPL-2 1.1 Mechanical and electrical parts...
  • Page 51 SECTION 5 PARTS LIST 1.Exploded views 1.1 Mechanical and electrical parts SPL-2...
  • Page 52 SECTION 5 PARTS LIST 2. IGP List SPL-3...

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