Mitsubishi Electric LT-52151 Service Manual

Vlp41/vlp41+/vlp41++ chassis, lcd flat panel television

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Owner's manual (94 pages)

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Summary of Contents for Mitsubishi Electric LT-52151

Page 1 Ser vice vice vice 2009 2009 2009 2009 2009 Manual Manual Manual Manual Manual MITSUBISHI ELECTRIC LCD FLAT PANEL TELEVISION VLP41 / VLP41+ / VLP41++ CHASSIS VLP41 Chassis VLP41+ Chassis LT-40151 LT-40153 LT-52249 LT-46151 LT-46153 LT-52151 LT-52153 VLP41++ Chassis LT-46249...
Page 2 • HDMI™ is a trademark of HDMI Licensing, LLC • Dolby and Dolby Digital are registered trademarks of Dolby Laboratories.
Page 3: Table Of Contents
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 CONTENTS INTRODUCTION ..........................5 Dimensions, Weight, etc........................ 5 PRODUCT SAFETY NOTICE ......................5 SAFETY PRECAUTIONS ......................... 6 DISASSEMBLY & PARTS REPLACEMENT ..................7 LCD Panel Replacement .........................
Page 4 MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 CIRCUITRY BLOCK DIAGRAMS ..................... 37 Power Supply Overview ......................... 37 5VSL Source ..........................38 5VSL Distribution .......................... 39 +340V Source ..........................40 PWB-ML-POWER ........................41 OVINV, 12VS &...
Page 5: Introduction
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 INTRODUCTION This service manual provides service instructions for LCD Flat Panel TV Models and Chassis: Dimensions, Weight & Power Consumption HEIGHT DEPTH WEIGHT POWER USAGE...
Page 6: Safety Precautions
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 SAFETY PRECAUTIONS NOTICE: Observe all cautions and safety related notes located inside the receiver cabinet and on the receiver chassis. WARNING: 1. Operation of this receiver outside the cabinet or with the cover removed presents a shock hazard from the receiver's power supplies.
Page 7: Disassembly & Parts Replacement
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY DISASSEMBLY & PARTS REPLACEMENT NOTE: Unless noted, instructions are for all models. Illustrations may differ slightly depending upon the actual model being serviced.
Page 8: Speaker Cabinet Removal & Disassembly
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) Speaker Cabinet Removal** 1) Disconnect all electrical connectors to the Speaker Cabinet. 2) Remove screws (A). 3) Lift the Speaker Cabinet from the TV.
Page 9: Bezel Removal & Replacement
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) Speaker Cabinet Disassembly (LT-46249 & LT-52249) 1) GRILL-REAR - Remove screws (B). 2) Preamp Assembly - Remove screw (C).
Page 10: Wall Mount Brackets Removal
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) Wall Mount Brackets Removal** 1) Remove screws (A). 2) Lift off the Wall Mount Brackets. WALL MOUNT BRACKETS C AC POWER...
Page 11: Net/Ml Assembly Removal
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) NET/ML Assembly Removal** (LT-46249 & LT-52249 Only) 1) Disconnect all electrical connectors from PWB-NET/ML and PWB-ML-POWER. 2) Remove screws (A).
Page 12: Pwb-Ml/Power Replacment
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) PWB-NET/ML Replacement (LT-46249 & LT-52249 Only) 1) Remove the NET/ML- ASSEMBLY.. PWB-NET/ML 2) From the reverse side, remove screws (C).
Page 13: Main Assembly Removal
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) Main Assembly Removal** /PWB-MAIN Replacement Note: The PWB-MAIN is replaced as an assembly that includes the shield. 1) Remove the NET/ML-Assembly. (LT-46249 & LT-52249 Only).
Page 14: Top, Bottom & Side Brackets Removal
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) Top, Bottom & Side Brackets Removal** Top Stay Removal** (52” Models) 1) 40” and 46” models - Remove screws (A) & (B).
Page 15: Lcd Panel Replacement Final Steps - Wiring And Wiring Clamps
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) LCD Panel Replacement Final Steps - Wiring and Wiring Clamps** 1) To replace the LCD Panel, reverse the disassembly procedure.
Page 16 MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) CLAMP CLAMP CLAMP WIRING/CLAMP LOCATIONS (LT-52151 & LT-52153) CLAMP CLAMP CLAMP WIRING/CLAMP LOCATIONS (LT-46249) Page 16...
Page 17 MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 DISASSEMBLY & PARTS REPLACEMENT (CONTINUED) CLAMP CLAMP CLAMP WIRING/CLAMP LOCATIONS (LT-52249) Page 17...
Page 18: Remote Control
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 REMOTE CONTROL REMOTE CONTROL USE FOR SERVICE Many service functions and adjustments are accessed using the Remote Control. The VLP41 uses a new version remote. Service functions and adjustments can be performed with either the old or new versions.
Page 19: Initialization, Initial Settings & Troubleshooting
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 OPTION MENU OPTION MENU 1. Press the <MENU> button on the remote control. 2. Press the buttons <2-4-7-0>. The screen will display the Option Menu.
Page 20: Reset And Initialization
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 RESET / INITIALIZATION SERVICE TIP: Many customer generated symptoms, intermittent symptoms or no symptom found can be resolved by using the various Reset and Initialization options. Before visiting the customer’s home ask the customer 1 perform a System Reset by pressing the <POWER>...
Page 21: Initial Settings
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 RESET / INITIALIZATION (Continued) INITIAL SETTINGS Audio/Video Initial Menu Settings Language (idioma) English Video Clock Picture Mode Bright Time 12:00PM Contrast Date 1/01/09 Brightness...
Page 22: A/V Reset
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 RESET / INITIALIZATION (Continued) A. A/V Memory Each of the external inputs has it’s own Audio/Video Memory. A change in an A/V setting at a specific input is stored in memory for that specific input.
Page 23: Backup / Restore Isf Settings
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 RESET / INITIALIZATION (Continued) BACKUP / RESTORE ISF SETTINGS If the customer has calibrated the ISF (ADV) video settings, the settings data can be backed up on a USB memory device.
Page 24: Led Indications & Self Diagnostics
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 LED INDICATIONS AND SELF DIAGNOSTICS The front panel Status LED provides an indication of the set’s operation and the possible cause of a malfunction.
Page 25: Error Codes
MODELS: LT-40151 / LT-46151 / LT-52151 / LT-40153 / LT-46153 / LT-52153 / LT-46249 / LT-52249 ERROR CODES Error Codes, causes and the most likely failure are listed below: ERROR CODES Error Code Cause Most Likely Failure Normal off No Problem detected...
Page 26: Using Lead Free Solder
MODELS: LT-40151 / LT-40153 / LT-46151 / LT-46153 / LT-46249 / LT-52151 / LT-52153 / LT-52249 Using Lead Free Solder Pb Solder • The time required for a good solder connection may take longer. The above symbol indicates Lead (Pb) Free solder was •...
Page 27: Chip Parts Replacement
MODELS: LT-40151 / LT-40153 / LT-46151 / LT-46153 / LT-46249 / LT-52151 / LT-52153 / LT-52249 CHIP PARTS REPLACEMENT Some resistors, shorting jumpers (0 Ohm resistors), ceramic capacitors, transistors and diodes are chip parts. The following precautions should be taken when replacing these parts.
Page 28: Replacement Parts
MODELS: LT-40151 / LT-40153 / LT-46151 / LT-46153 / LT-46249 / LT-52151 / LT-52153 / LT-52249 REPLACEMENT PARTS Parts Ordering To expedite delivery of replacement parts orders, specify the following: Model Number/Serial Number Part Number and description Quantity Note: Unless complete information is supplied, delay in processing of orders will result.
Page 29: Quick Reference List
MODELS: LT-40151 / LT-40153 / LT-46151 / LT-46153 / LT-46249 / LT-52151 / LT-52153 / LT-52249 QUICK REFERENCE LT-40151 LT-40153 LT-46151 LT-46153 LT-46249 LT-52151 LT-52153 LT-52249 LCD-MODULE 289P137020 289P138020 289P147010 289P143020 289P148020 ASSY-PWB-MAIN 934C335003 934C335004 934C335001 934C335002 934C335007 934C335005 934C335006 934C335008...
Page 30: Service Parts List
MODELS: LT-40151 / LT-40153 / LT-46151 / LT-46153 / LT-46249 / LT-52151 / LT-52153 / LT-52249 [#] Model Legend: (a) LT-40151, (b) LT-40153, (c) LT-46151, (d) LT-46153, (e) LT-46249, (f) LT-52151, (g) LT-52153, (h) LT-52249 Ref # Part # Part Name & Description...

This manual is also suitable for:

Lt-46151 Lt-40151 Lt-52153 Lt-40153 Lt-46249 Lt-52249 ... Show all

Mitsubishi Electric LT-52151 Service Manual

Models: Lt-40151 / Lt-46151 / Lt-52151 / Lt-40153 / Lt-46153 / Lt-52153 / Lt-46249 / Lt

Introduction

Product Safety Notice

Safety Precautions

Disassembly & Parts Replacement

Initialization, Initial Settings & Troubleshooting

Using Lead Free Solder

Chip Parts Replacement

Replacement Parts

Quick Reference List

Service Parts List