Service Manuals, User Guides, Schematic Diagrams or docs for : LG Monitor LG_L30W36_2_[SM]

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.




Image preview - the first page of the document
LG_L30W36_2_[SM]


>> Download LG_L30W36_2_[SM] documenatation <<

Text preview - extract from the document
      SERVICE MANUAL
                                                                                         Model Series:
       Product Type:      LCD Directview
                                                                                          L30W36
       Chassis:           MF02HA
       Manual Series:     PV155
       Model Line:        F
       Product Year:      2003


                        REVISED EDITION
                        Training material added




                                                    CONTENTS
                             OVERVIEW ............................................ 5
                             THEORY ............................................... 7
                             CIRCUIT DESCRIPTIONS .......................... 13
                             DISASSEMBLY ...................................... 23
                             ADJUSTMENTS ..................................... 25
                             DIAGRAMS .......................................... 28
                             PARTS ................................................ 35




                                          Published June 2003
                                        by Technical Publications
                                      Zenith Electronics Corporation
                                         201 James Record Road
                                     Huntsville, Alabama 35824-1513

                                 Copyright      2003 by Zenith Electronics Corporation
Printed in U.S.A.
         PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO PRODUCTS
IMPORTANT SAFETY NOTICE                                                                  5.   Caution customers against mounting a product on a sloping shelf or in a
This manual was prepared for use only by properly trained audio-video service                 tilted position, unless the receiver is properly secured.
technicians.
                                                                                         6.   A product on a roll-about cart should be stable in its mounting to the cart.
When servicing this product, under no circumstances should the original                       Caution the customer on the hazards of trying to roll a cart with small
design be modified or altered without permission from Zenith Electronics                      casters across thresholds or deep pile carpets.
Corporation. All components should be replaced only with types identical to
those in the original circuit and their physical location, wiring and lead dress         7.   Caution customers against using a cart or stand that has not been listed by
must conform to original layout upon completion of repairs.                                   Underwriters Laboratories, Inc. for use with its specific model of television
                                                                                              receiver or generically approved for use with TVs of the same or larger screen
Special components are also used to prevent shock and fire hazard. These                      size.
components are indicated by the letter "x" included in their component
designators and are required to maintain safe performance. No deviations are             8.   Caution customers against using extension cords. Explain that a forest of
allowed without prior approval by Zenith Electronics Corporation.                             extensions, sprouting from a single outlet, can lead to disastrous
                                                                                              consequences to home and family.
Circuit diagrams may occasionally differ from the actual circuit used. This way,
implementation of the latest safety and performance improvement changes into             ELECTROSTATICALLY SENSITIVE DEVICES
the set is not delayed until the new service literature is printed.                      Some semiconductor (solid-state) devices can be damaged easily by static elec-
                                                                                         tricity. Such components commonly are called Electrostatically Sensitive (ES)
CAUTION: Do not attempt to modify this product in any way. Never perform                 Devices. Examples of typical ES devices are integrated circuits and some field-
customized installations without manufacturer's approval. Unauthorized                   effect transistors and semiconductor "chip" components. The following tech-
modifications will not only void the warranty, but may lead to property damage           niques should be used to help reduce the incidence of component damage
or user injury. Service work should be performed only after you are thoroughly           caused by static electricity.
familiar with these safety checks and servicing guidelines.
                                                                                         1. Immediately before handling any semiconductor component or semiconduc-
FIRE AND SHOCK HAZARD                                                                    tor-equipped assembly, drain off any electrostatic charge on the body by touch-
While servicing, use an isolation transformer for protection from AC line shock.         ing a known earth ground. Alternatively, obtain and wear a commercially available
After the original service problem has been corrected, make a check of the               discharging wrist strap device, which should be removed for potential shock
following.                                                                               reasons prior to applying power to the unit under test.

1.    Be sure that all components are positioned to avoid a possibility of               2. After removing an electrical assembly equipped with ES devices, place the
      adjacent component shorts. This is especially important on items trans-            assembly on a conductive surface such as an ESD mat, to prevent electrostatic
      ported to and from the repair shop.                                                charge buildup or exposure of the assembly.
                                                                                         3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
2.    Verify that all protective devices such as insulators, barriers, covers,
      shields, strain reliefs, power supply cords, and other hardware have been          4. Use only an anti-static solder removal device. Some solder removal devices not
      reinstalled per the original design. Be sure that the safety purpose of the        classified as "anti-static" can generate electrical charges sufficient to damage ES
      polarized line plug has not been defeated.                                         devices.
3.    Soldering must be inspected to discover possible cold solder joints,               5. Do not use freon-propelled chemicals. These can generate electrical charge
      solder splashes, or sharp solder points. Be certain to remove all loose            sufficient to damage ES devices.
      foreign particles.                                                                 6. Do not remove a replacement ES device from its protective package until
4.    Check for physical evidence of damage or deterioration to parts and                immediately before you are ready to install it. (Most replacement ES devices are
      components, for frayed leads or damaged insulation (including the AC               packaged with leads electrically shorted together by conductive foam, aluminum
      cord), and replace if necessary.                                                   foil, or comparable conductive material.)
                                                                                         7. Immediately before removing the protective material from the leads of a
5.    No lead or component should touch a high current device or a resistor
                                                                                         replacement ES device, touch the protective material to the chassis or circuit
      rated at 1 watt or more. Lead tension around protruding metal surfaces
                                                                                         assembly into which the device will be installed.
      must be avoided.
                                                                                         Caution: Be sure no power is applied to the chassis or circuit, and observe all
6.    After reassembly of the set, always perform an AC leakage test on all              other safety precautions.
      exposed metallic parts of the cabinet (the channel selector knobs, antenna
      terminals, handle and screws) to be sure that set is safe to operate               8. Minimize bodily motions when handling unpackaged replacement ES devices.
      without danger of electrical shock. DO NOT USE A LINE ISOLATION TRANS-             (Otherwise, seemingly harmless motion, such as the brushing together of your
      FORMER DURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt             clothing or the lifting of your foot from a carpeted floor, can generate static
      or more sensitivity in the following manner: Connect a 1500 ohm, 10 watt           electricity sufficient to damage an ES device.)
      resistor, paralleled by a .15 mfd 150V AC type capacitor between a known
                                                                                         REGULATORY INFORMATION
      good earth ground water pipe, conduit, etc.) and the exposed metallic
      parts, one at a time. Measure the AC voltage across the combination of             This equipment has been tested and found to comply with the limits
      1500 ohm resistor and .15 mfd capacitor. Reverse the AC plug by using a            for a Class B digital device, pursuant to Part 15 of the FCC Rules.
      non-polarized adaptor and repeat AC voltage measurements for each ex-              These limits are designed to provide reasonable protection against
      posed metallic part. Voltage measured must not exceed 0.75 volts RMS.              harmful interference when the equipment is operated in a residential
      This corresponds to 0.5 milliamp AC. Any value exceeding this limit                installation. This equipment generates, uses and can radiate radio
      constitutes a potential shock hazard and must be corrected immediately.            frequency energy and, if not installed and used in accordance with
                                                                                         the instruction manual, may cause harmful interference to radio
TIPS ON PROPER INSTALLATION                                                              communications. However, there is no guarantee that interference
1.    Never install any receiver in a closed-in recess, cubbyhole, or closely
      fitting shelf space over, or close to, a heat duct, or in the path of heated
                                                                                         will not occur in a particular installation. If this equipment does
      air flow.                                                                          cause harmful interference to radio or television reception, which
                                                                                         can be determined by turning the equipment off and on, the user is
2.    Avoid conditions of high humidity such as: outdoor patio installations
      where dew is a factor, near steam radiators where steam leakage is a factor,       encouraged to try to correct the interference by one or more of the
      etc.                                                                               following measures: Reorient or relocate the receiving antenna; In-
3.    Avoid placement where draperies may obstruct venting. The customer
                                                                                         crease the separation between the equipment and receiver; Connect
      should also avoid the use of decorative scarves or other coverings that            the equipment into an outlet on a circuit different from that to
      might obstruct ventilation.                                                        which the receiver is connected; Consult the dealer or an experi-
4.    Wall- and shelf-mounted installations using a commercial mounting kit              enced radio/TV technician for help.
      must follow the factory-approved mounting instructions. A product mounted          The responsible party for this device's compliance is:
      to a shelf or platform must retain its original feet (or the equivalent            Zenith Electronics Corporation
      thickness in spacers) to provide adequate air flow across the bottom. Bolts        201 James Record Road
      or screws used for fasteners must not touch any parts or wiring. Perform
      leakage tests on customized installations.
                                                                                         Huntsville, AL 35824, USA
                                                                                         Digital TV Hotline: 1-800-243-0000

     L30W36                                                                          i                                                                   SAFETY
                                                      TABLE OF CONTENTS
OVERVIEW ............................................ 5
  INTRODUCTION ............................................... 5
  SPECIFICATIONS ............................................. 6
EXTERNAL CONTROL ............................... 7
  CONNECTION .................................................. 7
  CONFIGURATIONS ........................................... 7
  TRANSMISSION PROTOCOL ................................ 8
  LCD DISPLAY ................................................ 12
THEORY .............................................. 12
  LIQUID CRYSTALS ......................................... 12
  LCD PANEL .................................................. 13
  TERMINOLOGY .............................................. 14
CIRCUIT DESCRIPTIONS .......................... 16
  SYSTEM OVERVIEW ........................................ 16
  POWER SUPPLY ............................................ 16
  VIDEO ........................................................ 20
  AUDIO ........................................................ 21
DISASSEMBLY ...................................... 22
ADJUSTMENT INSTRUCTIONS ................... 24
  NOTES ........................................................ 24
  HEAT-RUN MODE .......................................... 24
  EDID ADJUSTMENT ........................................ 24
  WHITE BALANCE ADJUSTMENT ......................... 25
DIAGRAMS .......................................... 26
  EXPLODED VIEW ........................................... 26
  PCB DIAGRAMS ............................................ 28
PARTS ................................................ 33
  POWER SUPPLY CIRCUIT ................................ 39
SCHEMATICS ........................................ 40
  MAIN CIRCUIT ............................................. 40
  DIGITAL CIRCUIT .......................................... 41
  MICROPROCESSOR CIRCUIT ............................. 42
  DIGITAL MICROPROCESSOR CIRCUIT ................. 43
  DECODER CIRCUIT ......................................... 44
  DRIVER CIRCUIT 1/3 .................................... 45
  LCD DRIVER CIRCUIT 2/3 ............................... 46
  LCD DRIVER CIRCUIT 3/3 ............................... 47




 D60WLCD - 923-03486                                                      TOC
                                            OVERVIEW

OVERVIEW
INTRODUCTION
This manual covers the 30" LG and Zenith LCDs. They feature a 30" viewable area in a widescreen
format. They do not have a built in tuner but do have two RGB inputs, one VGA and one DVI-I. The
"-I" of "DVI-I" means they support both digital and analog, so a regular VGA connection can be
input to this connection using a DVI to VGA adapter (not supplied). The reason for two adapters is to
allow a computer and a set-top box to be connected at the same time. It is recommended to connect
devices like a computer using the DVI connection due to the high resolution and to avoid any
interference. This model also features regular TV connections to allow other components such as VCRs
and DVDs to be connected.
The internal layout is slightly different than smaller LCD TVs. This LCD has more fluorescent lamps
(16) and a built-in power supply that earlier smaller models didn't have. This model features a service
menu with advanced settings that can be accessed using an NEC service remote. Some new functions
are available to the operator. These include; Color Temperature, Screen Saver, Picture Format, Zoom,
Picture Position, and a VCR jitter removal feature.
This LCD is module level repair only. This device is more delicate than a regular TV and extra care
should be taken when working on it. The screen is plastic instead of glass and it's circuits are static
sensitive. Most failures will be related to a lamp inverter or a lamp, which will likely be reported by
the consumer as the screen suddenly becoming darker or flickering. There are four lamp assemblies
per inverter (2 lamps per assembly), so if an inverter is defective it will affect four lamp assemblies at
once (half the screen) versus a lamp related problem that will affect only one lamp at a time.




 L30W36                                           5                                           OVERVIEW
                                         OVERVIEW

SPECIFICATIONS

DISPLAY
Screen: 30" (30"VIS) WXGA Active Matrix TFT Color LCD, Digital Progressive 25.3" x 15.2"
        (643mm x 386mm)
 Aspect Ratio: 16:9
 Pixel Clock: 65Mhz
 Contrast Ratio: 450:1
 Response Time: 22ms (Typical), 25ms (Max.)
 Peak Brightness: 450 cd/m2
 Fall & Rise Time: 12ms (Typical)
 Native Display Resolution: 1280 x 768 (WXGA)
 Cell Pitch (HxV): 0.5025mm x 0.1675mm x RGB
 Backlighting: 16 CCFL Lamps Hf: 31.5~80KHz Vf: 56~120Hz
 Displayable Colors: 16.77 Million (24 Bit)
 Surface Treatment: Hard Coating 3H, Anti-Glare
 Viewing Angle: 170



◦ Jabse Service Manual Search 2020 ◦ Jabse Pravopis ◦ Other service manual resources online : FixyaeServiceinfo