LG Electronics L1933TR, L1733TR service manual No Raster Osd Is Not Displayed - Mstar, Waveforms

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3. NO RASTER (OSD IS NOT DISPLAYED) – MSTAR

3. NO RASTER (OSD IS NOT DISPLAYED) – MSTAR

1

 

NO RASTER

 

 

 

 

(OSD IS NOT DISPLAYED)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U201

 

 

NO

 

PIN 16, 75

 

 

 

 

 

 

 

 

 

 

 

3.3V?

 

 

 

 

 

 

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

U201

PIN96, 97NO OSCILLATE AS

14.31MHZ?

YES

U201

PIN27 IS 48KHz H-SYNC?

CHECK U301

1.CHECK C210, C211 SOLDERING CONDITION

2.CHECK X201

3.TROUBLE IN U201

CHECK CONNECTION

2

PIN28 IS 60Hz V-SYNC?

IS PULSE APPEARED

AT SIGNAL PINS?

AT MODE 12?

YES

TROUBLE IN CABLE

OR LCD MODULE

NO

LINE FROM D-SUB TO U201

Waveforms

1

U201-#96, 97

2

U201-#27 H-SYNC

2

U201-#28 V-SYNC

Copyright 2007 LG Electronics. Inc. All right reserved.

LGE Internal Use Only

Only for training and service purposes

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Contents READ THE SAFETY PRECAUTIONS IN THIS MANUAL Same model for ServiceCHASSIS NO. LM57B BEFORE SERVICING THE UNITCONTENTS SPECIFICATIONSPRECAUTION WARNING FOR THE SAFETY-RELATEDCOMPONENTmarked on the schematic diagram and the Leakage Current Hot Check CircuitElectrostatically Sensitive ES Devices SERVICING PRECAUTIONSGeneral Servicing Precautions IC Remove/Replacement ReplacementSmall-SignalDiscrete Transistor Removal/ReplacementAt Other Connections Circuit Board Foil RepairAt IC Connections SYNC TIMING CHARTVIDEO DISASSEMBLY-Set Only for training and service purposesSoft pad on the table Pull up the stand partOnly for training and service purposes Remove the screws1.Pull the front cover upward 3.Put the front face downDISASSEMBLY-Stand In case of Latch #1-1In case of Latch #1 DISASSEMBLY-StandOnly for training and service purposes Hold the stand bodyBLOCK DIAGRAM LIPSMStarACE Line BufferINVERTER BLOCK DIAGRAM-POWERPOWER DESCRIPTION OF BLOCK DIAGRAM 2.Power Part1.Video Controller Part 3.MICOM PartLIPS Board Block Diagram 6.Signal collectionPRIMARY Operation description LIPSADJUSTMENT SERVICE OSD Figure 1. Cable ConnectionWaveforms TROUBLESHOOTING GUIDE1. NO POWER 2. NO RASTER OSD IS NOT DISPLAYED - LIPS 3. NO RASTER OSD IS NOT DISPLAYED - MSTAR Waveforms4. TROUBLE IN DPM Waveforms5. POWER 6. Raster WIRING DIAGRAM Only for training and service purposesLGE Internal Use Only 6631900109ALGE Internal Use Only EXPLODED VIEWOnly for training and service purposes Description EXPLODED VIEW PARTS LISTRef. No REPLACEMENT PARTS LIST SAFETY MarkOnly for training and service purposes CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTSOnly for training and service purposes LGE Internal Use OnlyFILTERs TRANSISTOROnly for training and service purposes LGE Internal Use OnlyCAPACITORS TRANSISTORs & ICsTRANSFORMER Only for training and service purposesLGE Internal Use Only SCHEMATIC DIAGRAM 1. SCALEROnly for training and service purposes LGE Internal Use OnlyLGE Internal Use Only 2. POWER & WAFEROnly for training and service purposes LGE Internal Use Only 3. INVERTEROnly for training and service purposes LGE Internal Use Only 4. POWEROnly for training and service purposes Feb P/NO MFL43002807
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L1733TR, L1933TR specifications

LG Electronics has established itself as a prominent player in the display technology market, offering a diverse range of monitors catered to various user needs. Among their notable models are the L1733TR, L1753TR, L1953T, L1953TX, and L1933TR, each designed to deliver exceptional performance, vivid visuals, and ergonomic features ideal for both casual users and professionals.

The LG L1733TR and L1753TR models are 17-inch and 17-inch widescreen monitors respectively, boasting a resolution of 1280x1024 pixels. These monitors utilize a TFT LCD panel technology that results in outstanding clarity and color accuracy. With a quick response time, they are well-suited for gaming and video playback, reducing motion blur and ensuring a smooth viewing experience. The aspect ratio of 5:4 for L1733TR and 16:10 for L1753TR further enhances compatibility with a variety of applications, particularly those requiring precise graphics.

The L1953T and L1953TX models represent LG’s commitment to larger display solutions, featuring a 19-inch screen size. With a resolution of 1280x1024 pixels, these monitors deliver sharp images and vibrant colors, making them ideal for graphic design and multimedia tasks. The L1953TX variant includes an added feature of built-in speakers, allowing for an all-in-one multimedia experience without the need for external audio devices.

The L1933TR, another commendable entry in LG's lineup, exhibits a sleek design with a slim profile and narrow bezels, making it a contemporary choice for users keen on aesthetics. This 19-inch monitor uses advanced backlight technology to provide better energy efficiency and reduced power consumption compared to traditional LCDs. With a wide viewing angle, the L1933TR ensures consistent image quality from different perspectives, allowing for collaborative work and presentations.

In terms of connectivity, all models are equipped with a variety of input options including VGA and DVI, facilitating compatibility with an array of devices such as laptops and desktops. The inclusion of various ergonomic features such as adjustable stands and VESA mount compatibility enhances user comfort, making long hours of work less taxing on the body.

Overall, LG's L1733TR, L1753TR, L1953T, L1953TX, and L1933TR monitors exemplify the company’s dedication to providing innovative display solutions that combine cutting-edge technology with user-friendly features, catering to the diverse requirements of modern users.