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MITSUBISHI ELECTRIC
LT-46231
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
: 120V, 60Hz
• Power Usage : See Chart on Page 5
• Dimensions
: See Chart on Page 5
& Weight
• LCD Panel
: Resolution - 1920 x 1080
: Vertical Scan Range - 60Hz
• Tuning
: Digital/Analog Tuner - 1 (NTSC/ATSC/QAM)
Out Of Band Tuner - 1 (For CableCARD™)
• Tuning Range : Air VHF - 2~13, UHF - 14~69
Analog Cable - 1~125
Digital Cable - 1~135
• Antenna Inputs: 2-RF, 75Ω unbalanced (Digital or Analog)
• A/V Inputs
: Composite or S-Video (NTSC, 480i)
(Analog
1 Front, 2 Rear
w/Stereo
Component, EIA770.3 Standard
Audio)
(480i, 480p, 720p, 1080i)
VLP33 - 2 Rear
VLP33+ - 3 Rear
• Weight and dimensions are approximate.
• Design specifications are subject to change without notice.
MITSUBISHI DIGITAL ELECTRONICS AMERICA, INC.
Copyright © 2006 Mitsubishi Digital Electronics America, Inc.
Ser
Ser
Ser vice
Ser
Ser
Manual
Manual
Manual
Manual
Manual
LCD FLAT PANEL TELEVISION
VLP33 / VLP33+ CHASSIS
SPECIFICATIONS
• PC DVI-I Input : Analog or Digital - VGA, W-VGA, SVGA, W-
(w/Analog
Stereo Audio)
• Inputs/Outputs: HDMI™, EIA 861 B Standard
(Digital)
• Outputs
• Speakers
Pb Solder
• TV GUIDE and other related marks are registered marks of
• HDMI™ is a trademark of HDMI Licensing, LLC
• CableCARD is a trademark of Cable Television Laboratories, Inc.
• Dolby and Dolby digital are registered trademarks of Dolby
• DTV Link is a trademark of Consumer Electronics Association
9351 Jeronimo Road, Irvine, CA 92618-1904
All Rights Reserved
vice
vice
vice
vice
VLP33
LT-37131
LT-37132
LT-46131
LT-46231
SVGA, XGA, 1280x720 (720p) at 60 Hz
Digital Only - SXGA, WXGA at 60Hz
1920x1080 (1080p) at 24/30/60Hz:
480p / 720p / 1080i at 60Hz
1080p at 24/30/60Hz:
w/DVI Analog Stereo Audio, 2 Rear
IEEE1394, MPEG-2, 2 Rear
Digital Audio Output (Dolby® Digital/PCM)
1 Rear, Coaxial
: Stereo Audio Output, 1 Rear (Fixed)
Record A/V Output, 1 Rear
NetCommand®/G-LINK™ IR Emitter
VLP33 - None
VLP33+ - 1 Rear, Mini Jack
: Stereo, 2-way, 5.5"x2.2", 10W x 2, 6Ω
: PWBs use lead Free Solder
Gemstar-TV Guide International, Inc. and/or one of its affiliates.
Laboratories.
2 0 0 6
2 0 0 6
2 0 0 6
2 0 0 6
2 0 0 6
VLP33+
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Table of Contents
Related Manuals for Mitsubishi Electric LT-37131
Summary of Contents for Mitsubishi Electric LT-37131
- Page 1 2 0 0 6 2 0 0 6 2 0 0 6 2 0 0 6 2 0 0 6 Manual Manual Manual Manual Manual MITSUBISHI ELECTRIC LCD FLAT PANEL TELEVISION VLP33 / VLP33+ CHASSIS VLP33 VLP33+ LT-37131 LT-37132 LT-46131 LT-46231 LT-46231 CAUTION: Before servicing this chassis, it is important that the service person read the "SAFETY PRECAUTIONS"...
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Page 3: Table Of Contents
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 CONTENTS PRODUCT SAFETY NOTICE ......................5 SAFETY PRECAUTIONS ........................5 RESET / INITIALIZATION ........................7 OPTION MENU ..........................11 FRONT LED INDICATOR DIAGNOSTICS ..................12 CableCARD ............................. 13 TV GUIDE ON SCREEN ........................15 USING LEAD FREE SOLDER ...................... - Page 4 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 Page 4...
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Page 5: Product Safety Notice
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 INTRODUCTION This service manual provides service instructions for LCD Flat Panel TV Models and Chassis: SCREEN POWER HEIGHT HEIGHT DEPTH DEPTH WEIGHT MODEL CHASSIS (16:9) WIDTH USAGE (wo/STAND) (w/STAND) (wo/STAND) (w/STAND) (w/STAND) 24.4"... - Page 6 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 Leakage current check Before returning the receiver to the customer, leakage current should be measured using following methods. 1. Cold Check With the alternating current (AC) plug removed from the AC source, place a jumper across the two AC plug prongs.
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Page 7: Reset / Initialization
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 RESET & INITIALIZATION Front Panel Initialization While the unit is ON, pressing the FORMAT and INPUT buttons simultaneously will immediately start the Initialization sequence. The TV will reboot once the initialization sequence is completed. Front Panel Initialization will reset ALL user settings to the factory setting. - Page 8 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 Front Panel Guide 3) INITIAL <FORMAT+INPUT> Resets all Customer Menu and 2) A/V RESET <FORMAT+GUIDE> A/V Settings Resets all Customer Audio/Video Settings VOLUME FORMAT GUIDE INPUT ADJUST ADJUST ENTER CANCEL MENU SYSTEM...
- Page 9 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 Initial Factory Default Customer Settings (Continued) Icon Order AudioVideo Menu Menu (For VLP33) Record Menu A/V Memory Reset Ant-1 (For VLP33+) Settings Record Setup Channel Audio Record to Gray out (1 hr).
- Page 10 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 Initial Factory Default Audio/Video Settings Ant1 INPUT COMP 1394 HDMI CARD 1 & 2 DVI-I Ant2 1/2/3 1/2/3* (connected) (Video) READER A/V Memory (PC) Picture mode Brilliant Brilliant Brilliant Brilliant Brilliant Brilliant...
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Page 11: Option Menu
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 OPTION MENU VLP33 REMOTE CONTROL 1. Press the “MENU” button on the remote hand unit. 2. Press the buttons “2”, “4”, “7” and “0” in order. (The screen will change to the option menu.) <MENU><2-4-7-0>... -
Page 12: Front Led Indicator Diagnostics
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 FRONT LED INDICATOR DIAGNOSTICS The front panel LEDs provide an indication of the sets operation, and the possible cause of a malfunction. There are two front panel LEDs, “Power” and “Status.” Which LED is lit, the color, and whether it is blinking or steady indicate the current status, or a possible malfunction. -
Page 13: Cablecard
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 CableCARD To Engine Data Bus XILLEON IC8001 Data TS & Main Tuner (TU-100) Cable Data (Cable/ATSC/NTSC) PCMCIA POD I/F DEMODULATOR SLOT IC8506 IC1500 TS & (CableCARD) TS & Data Data OOB Tuner (TU-101 ) - Page 14 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 SYMPTOM POSSIBLE CAUSE(S) POSSIBLE RESOLUTIONS 1) Verify cable is connected to ANT1 2) Re-install/Replace CableCARD No channel map appears when pressing Cable is not connected to ANT1 -or- 3) Verify signal level and signal noise level...
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Page 15: Tv Guide On Screen
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 TVGuide On-Screen (TVGOS) SIGNAL-PWB DM-PWB Cable V-SYNC IC7R05 SYNC H-SYNC SEPARATOR GOS-TXD SYNC-PLL Matrix SW IC7R01 IC8307 QUAD SWITCH MICRO UART CONTROL GOS-RXD IC7R04 Main Tuner (TU-100) (Cable/ATSC/NTSC) MULTIPLEXER XILLEON VBI-DATA-IN IC2K01... - Page 16 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 (TVGOS Cont) TVGuide Diagnostics Mode: To access the TVGuide data section: 1)Press GUIDE button 2) Highlight SETUP on the top service bar 3) Press DOWN arrow one time to highlight the top menu item 4) Press “753159852”...
- Page 17 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 (TVGOS Cont) SYMPTOM POSSIBLE CAUSES POSSIBLE SOLUTION(s) Channel or Channels missing Incorrect setup or TVGuide has not added station(s) yet 1) Verify TVGuide setup is correct. Source/Zip code/etc from Guide 2) If still missing after 48 hours customer should contact MDEA...
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Page 18: Using Lead Free Solder
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 Using Lead Free Solder Pb Solder solder connection may take longer. • Poor wet-ability can cause solder balls. • Higher temperatures can cause flux spattering. The above symbol indicates Lead (Pb) Free solder was used during the construction of PWBs. -
Page 19: Disassembly
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 DISASSEMBLY - LT-37131 & LT-37132 Stand Removal 1. Place the TV face down on a soft clean surface with the stand extending over the edge of the table. 3. Unplug the motor drive cable from the rear of the TV. - Page 20 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 Cabinet Back Removal 1. Remove the screws indicated by the arrows on Cabinet Back. 2. Lift the Cabinet Back off the TV. Example of Arrows indicating screws to be removed Page 20...
- Page 21 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 PWB Locations and Removal 1. To remove PWBs, remove wall mount brackets, screws, shields and connectors as necessary. PWB-DM PWB-SIGNAL (Behind Shield) (Behind Shield) PWB-POWER WALL MOUNT PWBs-LED & PREAMP BRACKETS PWB-FRONT...
- Page 22 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 PWB Locations and Removal (Continued) PWB-SIGNAL (Shield Removed) PWB-DM (Shield Removed) PWB-E2P Note: When replacing the PWB-DM, transfer the PWB-E2P from the old PWB-DM to the replacement PWB-DM. Page 22...
- Page 23 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 TV Chassis Assembly Removal 1. Remove the Wall Mounts (3 screws each). 2. From the PWB-POWER, remove connectors PF & PD and AC Power Cord PS. 3. From the PWB-SIGNAL, remove connectors AT, AN, CE & LE from the bottom. Disconnect ES from the right side and remove the cable from the wire clamps.
- Page 24 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 LCD Panel Assembly Removal 1. Remove the 2 Stand Brackets (3 screws each). 2. Remove the PWB-AT-SW Assembly (2 screws). STAND MOUNTING BRACKET (3 SCREWS) STAND MOUNTING BRACKET (3 SCREWS) PWB-AT_SW ASSEMBLY (2 SCREWS) 3.
- Page 25 4. Dress all wiring harnesses in the original positions. DISASSEMBLY - LT-46131 & LT-46231 Disassembly of the LT-46131 & LT-46231 is similar to the LT-37131 & LT-37132. Specific details will be provided in a future update of this manual. Page 25...
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Page 26: Replacement Parts
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 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 27: Quick Reference
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 QUICK REFERENCE FOR COMMON PARTS LT-37131 LT-37132 LT-46131 LT-46231 PWB-DM 921C531001 921C531002 921C531003 921C531004 PWB-POWER 921C533002 921C533002 921C533001 921C533001 PWB-SIGNAL 921C534001 921C534002 921C534003 921C534004 PWB-FRONT 920D719002 920D719001 920D719003 920D719004 PWB-AT_SW 920D723001 920D723001 920D723002 920D723002... -
Page 28: Service Parts List
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description INTEGRATED CIRCUITS IC7P05 276P400010 IC-C-MOS - 74LVC1G125GV... - Page 29 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description IC8G10 276P325010 IC-C-MOS - MAX4232AKA+T/SOT-23+...
- Page 30 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description D9A50 262P804010 D-CHIP - 1SS355...
- Page 31 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description L3A09 409P777080 EMI-F-CHIP - BLM21P221S...
- Page 32 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description L9D04 410P003020 FERITE-BEAD RESISTORS L9D05...
- Page 33 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description 103P504020 1/16W 27K-J 103P501020 1/16W 82-J...
- Page 34 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description R9D01 109P179010 R-CEMENT-PLATE - 6.8-J...
- Page 35 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description SWITCHES C9A06 189P217090 C-CER-AC - AC250V E2200P-M...
- Page 36 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 [#] Model Legend: (a) LT-37131, (b) LT-37132, (c) LT-46131, (d) LT-46231 Ref # Part # Part Name & Description Ref # Part # Part Name & Description F9G01 283P075090 FUSE-CHIP - FCC20252ADTP...
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Page 37: Circuit Block Diagrams
MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 POWER SUPPLY Page 37... - Page 38 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 DM & SIGNAL POWER SUPPLIES Page 38...
- Page 39 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 VIDEO SIGNAL PATH Page 39...
- Page 40 MODELS: LT-37131 / LT-37132 / LT-46131 / LT-46231 AUDIO SIGNAL PATH Page 40...
- Page 41 R_OUT- PWB-LED L_OUT- L_SP PWB-FRONT L_OUT+ PA-H 37"Only CONTENTS LT-37131 VLP33 LT-46131 VLP33 PG 1..BLOCK LT-37132 VLP33+ PG 2..POWER LT-46231 VLP33+ PG 3..SIGNAL1 [TERMINAL] PG 4..SIGNAL2 [VIDEO SW / AUDIO AMP] PG 5..SIGNAL3 [3DYC / NTSC DECODER] PG 6..FRONT, E2P, AT-SW, PREAMP...
- Page 42 PA10 PA11 PA12 PA13 (TO SHILD EARTH) TO AC POWER CORD MODELS CHASSIS R9A63 R9A62 0.27 LT-46231 VLP33+ 0.33 LT-37131 VLP33 CONTENTS 0.33 LT-46131 VLP33 0.27 LT-46131 VLP33 PG 1..BLOCK 0.39 LT-37132 VLP33+ LT-37132 VLP33+ 0.39 PG 2..POWER LT-46231 VLP33+ 0.39...
- Page 43 INPUT1 Q2L51 2SA1235A-T112-1E,F 5VSCL,5VSDA,MAIN-L,MAIN-R SIGNAL2 SIGNAL2 SIGNAL2 SIGNAL2 SIGNAL2 VLP33+ ONLY LT-37131 VLP33 CONTENTS LT-46131 VLP33 PG 1..BLOCK LT-37132 VLP33+ PG 2..POWER LT-46231 VLP33+ PG 3..SIGNAL1 [TERMINAL] PG 4..SIGNAL2 [VIDEO SW / AUDIO AMP] PG 5..SIGNAL3 [3DYC / NTSC DECODER] PG 6..FRONT, E2P, AT-SW, PREAMP...
- Page 44 0.01 0.01 0.01 0.01 25V/50V 25V/50V 25V/50V 25V/50V 25V/50V 25V/50V TO PWB-DM TO PWB-FRONT LT-37131 VLP33 CONTENTS LT-46131 VLP33 LP33+ ONLY PG 1..BLOCK LT-37132 VLP33+ PG 2..POWER LT-46231 VLP33+ PG 3..SIGNAL1 [TERMINAL] TO PWB-DM TO PWB-DM PG 4..SIGNAL2 [VIDEO SW / AUDIO AMP] PG 5..SIGNAL3 [3DYC / NTSC DECODER]...
- Page 45 0.01 CSB500F2 1/16W 25V/50V C8H04 R8H84 C8H01 1/16W Q8H22 2SC3052-T112-1E,F LT-37131 VLP33 CONTENTS LT-46131 VLP33 PG 1..BLOCK LT-37132 VLP33+ PG 2..POWER LT-46231 VLP33+ PG 3..SIGNAL1 [TERMINAL] PG 4..SIGNAL2 [VIDEO SW / AUDIO AMP] PG 5..SIGNAL3 [3DYC / NTSC DECODER] PG 6..FRONT, E2P, AT-SW, PREAMP...
- Page 46 R8X22 1/16W L7K01 221 OHM 5VSB 1/16W C7K01 6.3V TO AT MOTOR LT-37131 VLP33 CONTENTS LT-46131 VLP33 PG 1..BLOCK LT-37132 VLP33+ PG 2..POWER LT-46231 VLP33+ PG 3..SIGNAL1 [TERMINAL] PG 4..SIGNAL2 [VIDEO SW / AUDIO AMP] PG 5..SIGNAL3 [3DYC / NTSC DECODER] PG 6..FRONT, E2P, AT-SW, PREAMP...