Mitsubishi Electric LT-52151 Service Manual
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Mitsubishi Electric LT-52151 Service Manual

Vlp41/vlp41+/vlp41++ chassis, lcd flat panel television
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MITSUBISHI ELECTRIC
LT-52249
CAUTION:
Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS" and
"PRODUCT SAFETY NOTICE" contained in this manual.
• Power Input
: AC 120V, 60Hz
• Power Usage
: See table on page 5
• Dimensions
: See table on page 5
& Weight
• LCD Panel
: Resolution - 1920 x 1080
: Refresh Rate - 120 Hz
• Tuning
: Digital/Analog Tuner
(NTSC/ATSC/QAM)
• Tuning Range
: Analog Cable - 1~125
Digital Cable - 1~135
• Antenna Input
: 1 RF 75 Ohms unbalanced
• Speakers
: 2W x 16 (V41/V41+)
: 2W x 16 & 20W x 2 (V41++)
Pb Solder
Lead-Free solder PWBs
• Design specifications are subject to change without notice.
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
SPECIFICATIONS
9351 Jeronimo Road, Irvine, CA 92618-1904
Copyright © 2009 Mitsubishi Digital Electronics America, Inc.
All Rights Reserved
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Manual
Manual
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Manual
Manual
LCD FLAT PANEL TELEVISION
VLP41 / VLP41+ / VLP41++ CHASSIS
VLP41 Chassis
LT-40151
LT-46151
LT-52151
VLP41++ Chassis
LT-46249
LT-52249
• Analog Output
: AUDIO / SUBWOOFER OUT JACK
Level
(RCA Type)
-4.7dBm 4.7kΩ unbalanced
• Analog Input
: VIDEO IN JACK (RCA Type)
Level
Y - 1.0Vp-p, Cr, Cb - 700mVp-p
75Ω unbalanced
• Digital
: HDMI
Inputs/Outputs
480i, 480p, 720p, 1080i (60Hz)
1080p(24Hz, 30Hz, 60Hz)
: Digital Audio Input (AC-3, PCM)
: Digital Audio Output (AC-3, PCM)
: USB Input
: Direct IR Input/NetCommand Ouput
(V41+, V41++)
: RS-232c (V41++)
: Ethernet Wired Internet Connector
(V41++)
• HDMI
TM
Digital PC Compatibilty
: 640 x 480, 898 x 480, 800 x 600,
1064 x 600, 1024 x768, 1280 x 720,
1365 x 768, 1280 x 1034 @ 60Hz,
1920 x 1080 @ 24Hz, 30Hz, 60Hz
2009
2009
2009
2009
2009
VLP41+ Chassis
LT-40153
LT-46153
LT-52153
TM
1.3 Inputs

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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...

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