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LG_ML012A_LN15A15_[SM]


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                                                  website:http://biz.LGservice.com
                                  e-mail:http://www.LGEservice.com/techsup.html




LCD TV
SERVICE MANUAL
CHASSIS : ML-012A

MODEL : LN-15A15
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
                                           CONTENTS




Contents .................................................................................................. 2

Safety Precautions ..................................................................................3

Servicing Precautions ............................................................................ 4

Adjustment Instruction ............................................................................6

Troubleshooting .....................................................................................12

Exploded View ...................................................................................... 14

Exploded View Parts List .......................................................................15

Replacement Parts List ........................................................................ 16

SVC. Sheet .................................................................................................
                                            SAFETY PRECAUTIONS

                                           IMPORTANT SAFETY NOTICE
 Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in
 the Schematic Diagram and Replacement Parts List.
 It is essential that these special safety parts should be replaced with the same components as recommended in this manual to
 prevent X-RADIATION, Shock, Fire, or other Hazards.
 Do not modify the original design without permission of manufacturer.



General Guidance                                                    Leakage Current Cold Check(Antenna Cold Check)
                                                                    With the instrument AC plug removed from AC source,
An lsolation Transformer should always be used during               connect an electrical jumper across the two AC plug prongs.
the servicing of a receiver whose chassis is not isolated from      Place the AC switch in the on positioin, connect one lead of
the AC power line. Use a transformer of adequate power rating       ohm-meter to the AC plug prongs tied together and touch other
as this protects the technician from accidents resulting in         ohm-meter lead in turn to each exposed metallic parts such as
personal injury from electrical shocks.                             antenna terminals, phone jacks, etc.
                                                                    If the exposed metallic part has a return path to the chassis, the
It will also protect the receiver and it's components from being    measured resistance should be between 1M and 5.2M.
damaged by accidental shorts of the circuitary that may be          When the exposed metal has no return path to the chassis the
inadvertently introduced during the service operation.              reading must be infinite.
                                                                    An other abnormality exists that must be corrected before the
If any fuse (or Fusible Resistor) in this TV receiver is blown,     receiver is returned to the customer.
replace it with the specified.
                                                                    Leakage Current Hot Check (See below Figure)
When replacing a high wattage resistor (Oxide Metal Film            Plug the AC cord directly into the AC outlet.
Resistor, over 1W), keep the resistor 10mm away from PCB.           Do not use a line Isolation Transformer during this check.
                                                                    Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
Keep wires away from high voltage or high temperature parts.        between a known good earth ground (Water Pipe, Conduit, etc.)
                                                                    and the exposed metallic parts.
Due to high vacuum and large surface area of picture tube,          Measure the AC voltage across the resistor using AC
extreme care should be used in handling the Picture Tube.           voltmeter with 1000 ohms/volt or more sensitivity.
Do not lift the Picture tube by it's Neck.                          Reverse plug the AC cord into the AC outlet and repeat AC
                                                                    voltage measurements for each esposed metallic part. Any
Before returning the receiver to the customer,                      voltage measured must not exceed 0.75 volt RMS which is
                                                                    corresponds to 0.5mA.
always perform an AC leakage current check on the exposed           In case any measurement is out of the limits sepcified, there is
metallic parts of the cabinet, such as antennas, terminals, etc.,   possibility of shock hazard and the set must be checked and
to be sure the set is safe to operate without damage of             repaired before it is returned to the customer.
electrical shock.
                                                                    Leakage Current Hot Check circuit

                                                                                           AC Volt-meter




                                                                                                               Good Earth Ground
                                                                                                               such as WATER PIPE,
                                                                      To Instrument's                          CONDUIT etc.
                                                                                                 0.15uF
                                                                      exposed
                                                                      METALLIC PARTS


                                                                                             1.5 Kohm/10W
                                          SERVICING PRECAUTIONS
CAUTION: Before servicing receivers covered by this service           transistors and semicounductor "chip" components. The
manual and its supplements and addenda, read and follow the           following techniques should be used to help reduce the
SAFETY PRECAUTIONS on page 3 of this publication.                     incidence of component damage caused by static by static
NOTE: If unforeseen circumstances create conflict between the         electricity.
following servicing precautions and any of the safety                 1. Immediately before handling any semiconductor component
precautions on page 3 of this publication, always follow the             or semiconductor-equipped assembly, drain off any
safety precautions. Remember: Safety First.                              electostatic charge on your body by touching a known earth
                                                                         ground. Alternatively, obtain and wear a commercially
General Servicing Precautions                                            available discharging wrist strap device, which should be
1. Always unplug the receiver AC power cord from the AC                  removed to prevent potential shock reasons prior to
   power source before;                                                  applying power to the unit under test.
   a. Removing or reinstalling any component, circuit board           2. After removing an electrical assembly equipped with ES
      module or any other receiver assembly.                             devices, place the assembly on a conductive surface such as
   b. Disconnecting or reconnecting any receiver electrical plug         aluminum foil, to prevent electrostatic charge buildup or
      or other electrical connection.                                    exposure of the assembly.
   c. Connecting a test substitute in parallel with an electrolytic   3. Use only a grounded-tip soldering iron to solder or unsolder
      capacitor in the receiver.                                         ES devices.
      CAUTION: A wrong part substitution or incorrect                 4. Use only an anti-static type solder removal device. Some
      polarity installation of electrolytic capacitors may result        solder removal devices not classified as "anti-static" can
      in an explosion hazard.                                            generate electrical charges sufficent to demage ES devices.
   d. Discharging the picture tube anode.                             5. Do not use freon-propelled chemicals. These can generate
2. Test high voltage only by measuring it with an appropriate            electrical charges sufficient to damage ES devices.
   high voltage meter or other voltage measuring device (DVM,         6. Do not remove a repalcement ES device from its protective
   FETVOM, etc) equipped with a suitable high voltage probe.             package until immediately before you are ready to install it.
   Do not test high voltage by "drawing an arc".                         (Most replacement ES devices are packaged with leads
3. Discharge the picture tube anode only by (a) first connecting         electrically shorted together by conductive foam, aluminum
   one end of an insulated clip lead to the degaussing or kine           foil or comparable conductive material).
   aquadag grounding system shield at the point where the             7. Immediately before removing the protective material from
   picture tube socket ground lead is connected, and then (b)            the ieads of a replacement ES device, touch the protective
   touch the other end of the insulated clip lead to the picture         material to the chassis or circuit assembly into which the
   tube anode button, using an insulating handle to avoid                device will be installed.
   personal contact with high voltage.                                   CAUTION:Be sure no power is applied to the chassis or
4. Do not spray chemicals on or near this receiver or any of its         circuit, and observe all other safety precautions.
   assemblies.                                                        8. Minimize bodily motions when handling unpackaged
5. Unless specified otherwise in this service manual, clean              replacement ES devices. (Otherwise harmless motion such
   electrical contacts only by applying the following mixture to         as the bruching together of your clothes fabric or the lifting
   the contacts with a pipe cleaner, cotton-tipped stick or              of your foot from a carpeted floor can generate static
   comparable nonabrasive applicator; 10% (by volume)                    electricity sufficient to damage an ES device.)
   Acetone and 90% (by volume) isopropyl alcohol (90%-99%
   strength)                                                          General Soldering Guidelines
   CAUTION: This is a flammable mixture.                              1. Use a grounded-tip, low-wattage soldering iron and
   Unless specified otherwise in this service manual, lubrication        appropriate tip size and shape that will maintan tip
   of contacts in not required.                                          temperature within the range or 500cF to 600cF.
6. Do not defeat any plug/socket B+ voltage interlocks with           2. Use an appropriate gauge of RMA resin-core solder
   which receivers covered by this service manual might be               composed of 60 parts tin/40 parts lead.
   equipped.                                                          3. Keep the soldering iron tip clean and well tinned.
7. Do not apply AC power to this instrument and/or any of its         4. Thorohly clean the surfaces to be soldered. Use a mall
   electrical assemblies unless all solid-state device heat sinks        wirebristle (0.5 inch, or 1.25cm) brush with a metal handle.
   are correctly installed.                                              Do not use freon-propelled spray-on cleaners.
8. Always connect the test receiver ground lead to the                5. Use the following unsoldering technique
   receiver chassis ground before connecting the test receiver           a. Allow the soldering iron tip to reach normal temperature.
   positive lead.                                                           (500cF to 600cF)
   Always remove the test receiver ground lead last.                     b. Heat the component lead until the solder melts.
9. Use with this receiver only the test fixtures specified in this       c. Quickly draw the melted solder with an anti-static,
   service manual.                                                          suction-type solder removal device or with solder braid.
   CAUTION: Do not connect the test fixture ground strap to                 CAUTION: Work quickly to avoid overheating the
   any heatsink in this receiver.                                           circuiboard printed foil.
                                                                      6. Use the following soldering technique.
Electrostatically Sensitive (ES) Devices                                 a. Allow the soldering iron tip to reach a normal
Some semiconductor (solid state) devices can be damaged                     temperature (500cF to 600cF)
easily by static electricity. Such components commonly are               b. First, hold the soldering iron tip and solder the strand
called Electrostatically Sensitive (ES) Devices. Examples of                against the component lead until the solder melts.
typical ES devices are integrated circuits and some fieldeffect
   c. Qulckly move the soldering iron tip to the junction of the     Fuse and Conventional Resistor
      component lead and the printed circuit foil, and hold it       Removal/Replacement
      there only until the solder flows onto and around both the     1. Clip each fuse or resistor lead at top of the circuit board
      component lead and the foil.                                      hollow stake.
      CAUTION: Work quickly to avoid overheating the circuit         2. Securely crimp the leads of replacement component around
      board printed foil.                                               notch at stake top.
   d. Closely inspect the solder area and remove any excess          3. Solder the connections.
      or splashed solder with a small wire-bristle brush.               CAUTION: Maintain original spacing between the replaced
                                                                        component and adjacent components and the circuit board
IC Remove/Replacement                                                   to prevent excessive component temperatures.
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the       Circuit Board Foil Repair
circuit foil. When holes are the slotted type, the following         Excessive heat applied to the copper foil of any printed circuit
technique should be used to remove and replace the IC. When          board will weaken the adhesive that bonds the foil to the circuit
working with boards using the familiar round hole, use the           board causing the foil to separate from or "lift-off" the board.
standard technique as outlined in parapraphs 5 and 6 above.          The following guidelines and procedures should be followed
                                                                     whenever this condition is encountered.
Removal
1. Desolder and straighten each IC lead in one operation by          At IC Connections
   gently prying up on the lead with the soldering iron tip as the   To repair a defective copper pattern at IC connections use the
   solder melts.                                                     following procedure to install a jumper wire on the copper
2. Draw away the melted solder with an anti-static suction-          pattern side of the circuit board. (Use this technique only on IC
   type solder removal device (or with solder braid) before          connections).
   removing the IC.
Replacement                                                          1. Carefully remove the damaged copper pattern with a sharp
1. Carefully insert the replacement IC in the circuit boare.            knife. (Remove only as much copper as absolutely
2. Carefully bend each IC lead against the circuit foil pad and         necessary).
   solder it.                                                        2. carefully scratch away the solder resist and acrylic coating
3. Clean the soldered areas with a small wire-bristle brush.            (if used) from the end of the remaining copper pattern.
   (It is not necessary to reapply acrylic coating to the areas).    3. Bend a small "U" in one end of a small gauge jumper wire and
                                                                        carefully crimp it around the IC pin. Solder the IC connection.
"Small-Signal" Discrete Transistor                                   4. Route the jumper wire along the path of the out-away
Removal/Replacement                                                     copper pattern and let it overlap the previously scraped end
1. Remove the defective transistor by clipping its leads as             of the good copper pattern. Solder the overlapped area and
   close as possible to the component body.                             clip off any excess jumper wire.
2. Bend into a "U" shape the end of each of three leads
   remaining on the circuit board.                                   At Other Connections
3. Bend into a "U" shape the replacement transistor leads.           Use the following technique to repair the defective copper
4. Connect the replacement transistor leads to the                   pattern at connections other than IC Pins. This technique
   corresponding leads extending from the circuit board and          involoves the installation of a jumper wire on the component
   crimp the "U" with long nose pliers to insure metal to metal      side of the circuit board.
   contact then solder each connection.
                                                                     1. Remove the defective copper pattern with a sharp knife.
Power Output, Transistor Device                                         Remove at least 1/4 inch of copper, to ensure that a
Removal/Replacement                                                     hazardous condition will not exist if the jumper wire opens.
1. Heat and remove all solder from around the transistor leads.      2. Trace along the copper pattern from both sides of the
2. Remove the heatsink mounting screw (if so equipped).                 pattern break and locate the nearest component that is
3. Carefully remove the transistor from the heat sink of the            directly connected to the affected copper pattern.
   circuit board.                                                    3. Connect insulated 20-gauge jumper wire from the lead of
4. Insert new transistor in the circuit board.                          the nearest component on one side of the pattern break to
5. Solder each transistor lead, and clip off excess lead.               the lead of the nearest component on the other side.
6. Replace heatsink.                                                    Carefully crimp and solder the connections.
                                                                        CAUTION: Be sure the insulated jumper wire is dressed so
Diode Removal/Replacement                                               the it does not touch components or sharp edges.
1. Remove defective diode by clipping its leads as close as
   possible to diode body.
2. Bend the two remaining leads perpendicula y to the circuit
   board.
3. Observing diode polarity, wrap each lead of the new diode
   around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
   the two "original" leads. If they are not shiny, reheat them
   and if necessary, apply additional solder.
                                      ADJUSTMENT INSTRUCTION

1. Application Object                                                  3. PC Input Mode Adjustment
  This instruction is for the application to the LCD TV.
                                                                       3-1. Required Test Equipment
                                                                        (1) A pattern generator being in proportion to 801GF(or
                                                                           VG819) ; Gray Pattern of 16(11) tones
2. Notes                                                                (2) A Service remote control

  (1) This set uses an adapter, so connect the adapter and the         3-2. Preparation for Adjustment
     set correctly before adjustment.                                   (1) Perform `Heat Run' for more than 30 minutes in white
  (2) The adjustment must be performed under the correct                   pattern.
     sequence.                                                          (2) Connect the signal of pattern generator with LCD TV of PC
  (3) The adjustment must be performed in the circumstance of              Input Jack(D-Sub).
     25!5cC of temperature and 65!10% of relative humidity if
     there is no specific designation.                                 3-3. Auto Gray Adjustment
  (4) The input voltage of the receiver must keep 100~220V,             (1) Apply the gray signal of XGA(1024X768) 16 tones(H: 31-
     50/60Hz in adjusting.                                                 214 Pattern, V: 60-84 Pattern) by using 801GF.
  (5) The set must be operated for 30 minutes preliminarily                Or apply the gray signal of Pattern Generator 16(11) tones
     before adjustment if there is no specific designation.                by using VG819.
                                                                        (2) Pressing ADJ Key(or SVC Key) of Remote Control for
[ `Heat Run' must be performed with the full white signal or TV            Adjustment, adjust the Auto gay from 0 to 1 by using
   noise signal in the internal part of the set.                           Volume + Key.
[ The time for `Heat Run' can be changed owing to production
   plan.



3-4. Position of Mode Adjustment
       Timing of Mode Table                                                                                  * H[dot]/V[line]

            Mode         VGA-60        VGA-67      VGA-72    VGA-75       VGA-85      SVGA-56      SVGA-60      SVGA-72

           H_Total         800           864          832     840           832         1024         1056          1040

          H_Display        640           640          656     640           640          800         800           800

         H_Blanking        160           224          176     200           192          224         256           240

           H_Sync           96            64          40          64         56           72         128           120

          H Polarity       NEG.         NEG.         NEG.    NEG.           NEG.        POS          POS           POS

            H_Bp            48            96          120     120            80          128          88            64

            H_Fp            16            64          16          16         56           24          40            56

         H-Freq[KHz]      31.469         35.0       37.861    37.5         43.269      35.156       37.879        48.077

          /Clk[MHz]       25.175        30.24        31.5     31.5          36.0         36.0        40.0          50.0

           V_Total         525           525          520     500           509          625         628           666

          V_Display        480           480          496     480           480          600         600           600

         V_Blanking         45            45          24          20         29           25          28            66

           V_Sync            2            3            3          3           3           2            4             6

          V Polarity       NEG          NEG          NEG      NEG           NEG         POS          POS           POS

            V_Bp            33            39          20          16         25           22          23            23

            V_Fp            10            3            1          1           1           1            1            37
   Mode       SVGA-75        SVGA-85     XGA-60    XGA-70         XGA-75    MAC-75      XGA-85

  H_Total      1056           1048        1344      1328           1312      1152        1376

H_Display       800            800        1024      1024           1024       832        1024

H_Blanking      256            248         320      304             288       320        352

  H_Sync        80             64          136      136             96        64          96

 H Polarity    POS            POS         NEG                      POS       NEG         POS

   H_Bp         160            152         136      144             176       224        208

   H_Fp         16             32          160       24             16        32          48

H-Freq[KHz]   46.875         53.674      48.363    56.476          60.023    49.725     68.677

 /Clk[MHz]     49.5           56.25       65.0      75.0           78.75     57.283     84.997

  V_Total       625            631         806      806             800       667        808

 V_Display      600            600         768      768             768       624        768

V_Blanking      25             31          38        38             32        43          40

  V_Sync         3              3              6     6               3         3          3

 V Polarity    POS            POS         NEG       NEG            POS       NEG         POS

   V_Bp         21             27          29        29             28        39          36

   V_Fp          1              1              3     3               1         1          1




   Mode         VGA350-70              VGA350-85      VGA400-70             VGA400-85

  H_Total             800                 832               800                832

H_Display             640                 640               640                640

H_Blanking            160                 192               160                192

  H_Sync              96                  64                96                 64

 H Polarity          POS                 POG                NEG               NEG

   H_Bp               48                  96                48                 96

   H_Fp               16                  32                16                 32

H-Freq[KHz]      31.468                  37.86             31.46              37.86

 /Clk[MHz]           25.17               31.47             25.17              31.5

  V_Total             449                 445               449                445

 V_Display            350                 350               400                400

V_Blanking            99                  95                49                 45

  V_Sync               2                   3                 2                  3

 V Polarity          NEG                 NEG                POS               POS

   V_Bp               60                  60                35                 41

   V_Fp               37                  32                12                  1
4. EDID(The Extended Display Identification Data)
  EDID Table
               00    01    02       03    04   05       06    07     08       09   0A    0B   0C       0D   0E     0F
      00       00    FF    FF       FF    FF   FF       FF    00     30       E5   D7    3A   01       00   00     00
      10       00    0B    01       01    78   1F       17    70     E8       C3   A0    A3   54       4C   97     24
      20       14    50    54       BF    E8   80       31    59     3B       D9   45    59   61       59   71     59
      30       81    40    81       80    01   01       10    0E     01       01   01    01   01       01   01     01
      40       01    01    01       01    01   01       01    01     F9       15   01    01   01       01   01     01
      50       01    01    01       01    01   01       01    01     01       01   64    19   00       40   41     00
      60       26    30    18       88    36   00       0E    C3     10       00   00    1E   00       00   00     FD
      70       00    32    55       1E    46   0D       00    0A     20       20   20    20   20       20   00     C8


5. Option1 data(200PR~A2 ST:1bit,SYS:2bit)
OPTION                                                                             OPTION
       200PR        TEXT   I/II SV       TOP   SCART         A2 ST    SYS                 200PR             TEXT   I/II SV   TOP   SCART   A2 ST   SYS
 Data                                                                               Data
  0        0         0          0         0         0          0          0             32         0         0          1     0      0       0      0
  1        0         0          0         0         0          0          1             33         0         0          1     0      0       0      1
  2        0         0          0         0         0          0          2             34         0         0          1     0      0       0      2
  3        0         0          0         0         0          0          3             35         0         0          1     0      0       0      3
  4        0         0          0         0         0          1          0             36         0         0          1     0      0       1      0
  5        0         0          0         0         0          1          1             37         0         0          1     0      0       1      1
  6        0         0          0         0         0          1          2             38         0         0          1     0      0       1      2
  7        0         0          0         0         0          1          3             39         0         0          1     0      0       1      3
  8        0         0          0         0         1          0          0             40         0         0          1     0      1       0      0
  9        0         0          0         0         1          0          1             41         0         0          1     0      1       0      1
 10        0         0          0         0         1          0          2             42         0         0          1     0      1       0      2
 11        0         0          0         0         1          0          3             43         0         0          1     0      1       0      3
 12        0         0          0         0         1          1          0             44         0         0          1     0      1       1      0
 13        0         0          0         0         1          1          1             45         0         0          1     0      1       1      1
 14        0         0          0         0         1          1          2             46         0         0          1     0      1       1      2
 15        0         0          0         0         1          1          3             47         0         0          1     0      1       1      3
 16        0         0          0         1         0          0          0             48         0         0          1     1      0       0      0
 17        0         0          0         1         0          0          1             49         0         0          1     1      0       0      1
 18        0         0          0         1         0          0          2             50         0         0          1     1      0       0      2
 19        0         0          0         1         0          0          3             51         0         0          1     1      0       0      3
 20        0         0          0         1         0          1          0             52         0         0          1     1      0       1      0
 21        0         0          0         1         0          1          1             53         0         0          1     1      0       1      1
 22        0         0          0         1         0          1          2             54         0         0          1     1      0       1      2
 23        0         0          0         1         0          1          3             55         0         0          1     1      0       1      3
 24        0         0          0         1         1          0          0             56         0         0          1     1      1       0      0
 25        0         0          0         1         1          0          1             57         0         0          1     1      1       0      1
 26        0         0          0         1         1          0          2             58         0         0          1     1      1       0      2
 27        0         0          0         1         1          0          3             59         0         0          1     1      1       0      3
 28        0         0          0         1         1          1          0             60         0         0          1     1      1       1      0
 29        0         0          0         1         1          1          1             61         0         0          1     1      1       1      1
 30        0         0          0         1         1          1          2             62         0         0          1     1      1       1      2
 31        0         0          0         1         1          1          3             63         0         0          1     1      1       1      3

                                                                               -8-
OPTION                                                      OPTION
       200PR   TEXT   I/II SV   TOP   SCART   A2 ST   SYS          200PR   TEXT   I/II SV   TOP   SCART   A2 ST   SYS
 Data                                                        Data
 64      0      1       0        0      0       0      0     110     0      1       1        0      1       1      2
 65      0      1       0        0      0       0      1     111     0      1       1        0      1       1      3
 66      0      1       0        0      0       0      2     112     0      1       1        1      0       0      0
 67      0      1       0        0      0       0      3     113     0      1       1        1      0       0      1
 68      0      1       0        0      0       1      0     114     0      1       1        1      0       0      2
 69      0      1       0        0      0       1      1     115     0      1       1        1      0       0      3
 70      0      1       0        0      0       1      2     116     0      1       1        1      0       1      0
 71      0      1       0        0      0       1      3     117     0      1       1        1      0       1      1
 72      0      1       0        0      1       0      0     118     0      1       1        1      0       1      2
 73      0      1       0        0      1       0      1     119     0      1       1        1      0       1      3
 74      0      1       0        0      1       0      2     120     0      1       1        1      1       0      0
 75      0      1       0        0      1       0      3     121     0      1       1        1      1       0      1
 76      0      1       0        0      1       1      0     122     0      1       1        1      1       0      2
 77      0      1       0        0      1       1      1     123     0      1       1        1      1       0      3
 78      0      1       0        0      1       1      2     124     0      1       1        1      1       1      0
 79      0      1       0        0      1       1      3     125     0      1       1        1      1       1      1
 80      0      1       0        1      0       0      0     126     0      1       1        1      1       1      2
 81      0      1       0        1      0       0      1     127     0      1       1        1      1       1      3
 82      0      1       0        1      0       0      2     128     1      0       0        0      0       0      0
 83      0      1       0        1      0       0      3     129     1      0       0        0      0       0      1
 84      0      1       0        1      0       1      0     130     1      0       0        0      0       0      2
 85      0      1       0        1      0       1      1     131     1      0       0        0      0       0      3
 86      0      1       0        1      0       1      2     132     1      0       0        0      0       1      0
 87      0      1       0        1      0       1      3     133     1      0       0        0      0       1      1
 88      0      1       0        1      1       0      0     134     1      0       0        0      0       1      2
 89      0      1       0        1      1       0      1     135     1      0       0        0      0       1      3
 90      0      1       0        1      1       0      2     136     1      0       0        0      1       0      0
 91      0      1       0        1      1       0      3     137     1      0       0        0      1       0      1
 92      0      1       0        1      1       1      0     138     1      0       0        0      1       0      2
 93      0      1       0        1      1       1      1     139     1      0       0        0      1       0      3
 94      0      1       0        1      1       1      2     140     1      0       0        0      1       1      0
 95      0      1       0        1      1       1      3     141     1      0       0        0      1       1      1
 96      0      1       1        0      0       0      0     142     1      0       0        0      1       1      2
 97      0      1       1        0      0       0      1     143     1      0       0        0      1       1      3
 98      0      1       1        0      0       0      2     144     1      0       0        1      0       0      0
 99      0      1       1        0      0       0      3     145     1      0       0        1      0       0      1
 100     0      1       1        0      0       1      0     146     1      0       0        1      0       0      2
 101     0      1       1        0      0       1      1     147     1      0       0        1      0       0      3
 102     0      1       1        0      0       1      2     148     1      0       0        1      0       1      0
 103     0      1       1        0      0       1      3     149     1      0       0        1      0       1      1
 104     0      1       1        0      1       0      0     150     1      0       0        1      0       1      2
 105     0      1       1        0      1       0      1     151     1      0       0        1      0       1      3
 106     0      1       1        0      1       0      2     152     1      0       0        1      1       0      0
 107     0      1       1        0      1       0      3     153     1      0       0        1      1       0      1
 108     0      1       1        0      1       1      0     154     1      0       0        1      1       0      2
 109     0      1       1        0      1       1      1     155     1      0       0        1      1       0      3
OPTION                                                      OPTION
       200PR   TEXT   I/II SV   TOP   SCART   A2 ST   SYS          200PR   TEXT   I/II SV   TOP   SCART   A2 ST   SYS
 Data                                                        Data
 156     1      0       0        1      1       1      0     202    01      1       0        0      1       0      2
 157     1      0       0        1      1       1      1     203     1      1       0        0      1       0      3
 158     1      0       0        1      1       1      2     204     1      1       0        0      1       1      0
 159     1      0       0        1      1       1      3     205     1      1       0        0      1       1      1
 160     1      0       1        0      0       0      0     206     1      1       0        0      1       1      2
 161     1      0       1        0      0       0      1     207     1      1       0        0      1       1      3
 162     1      0       1        0      0       0      2     208     1      1       0        1      0       0      0
 163     1      0       1        0      0       0      3     209     1      1       0        1      0       0      1
 164     1      0       1        0      0       1      0     210     1      1       0        1      0       0      2
 165     1      0       1        0      0       1      1     211     1      1       0        1      0       0      3
 166     1      0       1        0      0       1      2     212     1      1       0        1      0       1      0
 167     1      0       1        0      0       1      3     213     1      1       0        1      0       1      1
 168     1      0       1        0      1       0      0     214     1      1       0        1      0       1      2
 169     1      0       1        0      1       0      1     215     1      1       0        1      0       1      3
 170     1      0       1        0      1       0      2     216     1      1       0        1      1       0      0
 171     1      0       1        0      1       0      3     217     1      1       0        1      1       0      1
 172     1      0       1        0      1       1      0     218     1      1       0        1      1       0      2
 173     1      0       1        0      1       1      1     219     1      1       0        1      1       0      3
 174     1      0       1        0      1       1      2     220     1      1       0        1      1       1      0
 175     1      0       1        0      1       1      3     221     1      1       0        1      1       1      1
 176     1      0       1        1      0       0      0     222     1      1       0        1      1       1      2
 177     1      0       1        1      0       0      1     223     1      1       0        1      1       1      3
 178     1      0       1        1      0       0      2     224     1      1       1        0      0       0      0
 179     1      0       1        1      0       0      3     225     1      1       1        0      0       0      1
 180     1      0       1        1      0       1      0     226     1      1       1        0      0       0      2
 181     1      0       1        1      0       1      1     227     1      1       1        0      0       0      3
 182     1      0       1        1      0       1      2     228     1      1       1        0      0       1      0
 183     1      0       1        1      0       1      3     229     1      1       1        0      0       1      1
 184     1      0       1        1      1       0      0     230     1      1       1        0      0       1      2
 185     1      0       1        1      1       0      1     231     1      1       1        0      0       1      3
 186     1      0       1        1      1       0      2     232     1      1       1        0      1       0      0
 187     1      0       1        1      1       0      3     233     1      1       1        0      1       0      1
 188     1      0       1        1      1       1      0     234     1      1       1        0      1       0      2
 189     1      0       1        1      1       1      1     235     1      1       1        0      1       0      3
 190     1      0       1        1      1       1      2     236     1      1       1        0      1       1      0
 191     1      0       1        1      1       1      3     237     1      1       1        0      1       1      1
 192     1      1       0        0      0       0      0     238     1      1       1        0      1       1      2
 193     1      1       0        0      0       0      1     239     1      1       1        0      1       1      3
 194     1      1       0        0      0       0      2     240     1      1       1        1      0       0      0
 195     1      1       0        0      0       0      3     241     1      1       1        1      0       0      1
 196     1      1       0        0      0       1      0     242     1      1       1        1      0       0      2
 197     1      1       0        0      0       1      1     243     1      1       1        1      0       0      3
 198     1      1       0        0      0       1      2     244     1      1       1        1      0       1      0
 199     1      1       0        0      0       1      3     245     1      1       1        1      0       1      1
 200     1      1       0        0      1       0      0     246     1      1       1        1      0       1      2
 201     1      1       0        0      1       0      1     247     1      1       1        1      0       1      3
OPTION
       200PR     TEXT     I/II SV    TOP    SCART   A2 ST   SYS
 Data
 248        1     1         1         1       1       0      0
 249        1     1         1         1       1       0      1
 250        1     1         1         1       1       0      2
 251        1     1         1         1       1       0      3
 252        1     1         1         1       1       1      0
 253        1     1         1         1       1       1      1
 254        1     1         1         1       1       1      2
 255        1     1         1         1       1       1      3



6. Option2 data(ACMS~BBACK:1bit,LANG:3bit)
   OPTION
                 ACMS                 VOL           HIDEV
    Data
       0           0                   0              0
       1           0                   0              1
       2           0                   1              0
       3           0                   1              1
       4           1                   0              0
       5           1                   0              1
       6           1                   1              0
       7           1                   1              1



7. Option3 data(IIC AFT~CH+AU:1bit)
   OPTION
                IIC AFT             MD SAVE         MONO          CH+AUS
    Data
       0          0                    0              0             0
       1          0                    0              0             1
       2          0                    0              1             0
       3          0                    0              1             1
       4          0                    1              0             0
       5          0                    1              0             1
       6          0                    1              1             0
       7          0                    1              1             1
       8          1                    0              0             0
       9          1                    0              0             1
       10         1                    0              1             0
       11         1                    0              1             1
       12         1                    1              0             0
       13         1                    1              0             1
       14         1                    1              1             0
       15         1                    1              1             1
                                           TROUBLESHOOTING
1. General Features
  No.         Symptom                             Cause                                       Check Point

   1    Button doesn't           1) Broken components and               1) Check button with eyes
        function                    soldering of them                      Check and repair soldering
                                 2) P2 connector error                  2) Check and repair the P2 connector
   2    No screen                Input error of inverter connector      1) Bend the pin legs of P1 connector -> recheck them
                                                                        2) Check and repair the IC804,805 SI4925
                                 P902 and Pin 21 connector              1) Check and fix P902 connector
                                 being slipped out                      2) Check and fix the components at P902 LCD module
                                                                           and at main board.
                                                                        3) Check Pin21.
                                 Cracked components and                 1) Check and repair tuner board and main board
                                 soldering at tuner board               2) Solder Q102.
   3    Dark screen              1) Defective LCD lamp                  1) Replace the inverter
                                 2) Defective inverter                  2) Replace the LCD lamp
                                 3) Input error of inverter connector   3) Check the connector input.




2. PC Mode
  No.         Symptom                             Cause                                       Check Point

   4    Screen noise             Clock or phase being                   1) Resettig is needed according to the video card of each
                                 not able to be adjusted                   PC
                                                                        2) Horizontal noise : adjust phase until no horizontal
                                                                           noise occurres
                                                                        3) Vertical noise : adjust clock in menu until no vertical
                                                                           noise occurres
   5    Screen position error    Screen position error                  1) Play the Auto Configure in Menu.
                                 horizontally or vertically             2) Adjust horizontal and vertical position until the screen
                                                                           displayes normally
   6    Color beat noise         Soldering D-SUB Jack of JA202          Recheck and repair JA202,IC202
                                 and IC202.




3. TV and external input
  No.         Symptom                             Cause                                       Check Point
   7    No sound                 Defective Reset IC of IC603            1) Check volume and speaker
        - Speaker                Defective MSP3440G of IC601            - Sound comes out only when being inputted into Audio
        - Earphone               Defective B+(8V,5V) of IC604,605.        L/R
                                                                        2) Check after replacing IC603
                                                                        3) Replace IC601
                                                                        4) Check and replace B+ of IC604,605.
   8    Video color beat noise   Earphone shield case being touched     Check the mold of shield and JA203, Replace shield case
                                 Soldering IC301 and IC912              Re-soldering
MEMO
                                    EXPLODED VIEW




                                                      521




                                                                           400




                                                500



                       P801
            A4
                                                                                 410




                 121
      120                                              540
                                                                    541

300


                                    112




                                          530
                              310

                                                                          420



                                                        430




                                                              440
                    EXPLODED VIEW PARTS LIST

No.     PART NO.                                DESCRIPTION

112   6304FLP006B         LCD,LC151X01-C3P1 LG PHILPS TFT CO

120   6400VA0017A         SPEAKER,GENERAL T401SX-095K14 LG C&D 8 OHM 1.0

121   4950V00010A         METAL,HOLDER SPK SBHG NON

300   3091V00226R         CABINET ASSEMBLY,LN-15A15 ACBLKC ML012A

310   5020V00360B         BUTTON,CONTROL RUBBER SET

400   3809V00275J         BACK COVER ASSEMBLY

410   4950V00025B         METAL,TITLING ASSY

420   4950V00006A         METAL,STAND SECC

430   4930V00103B         HOLDER,STAND ABS AF-303S(04431B,WHITE

440   3550V00081A         COVER,BASE LN-15A1

500   3141VMNC22M         CHASSIS ASSEMBLY,MAIN ML012A

530   6871VSMA56A         PCB ASSEMBLY,SUB CONT ML-012A LE-15A15

540   6633VA0003K         INVERTER ASSEMBLY,12VOLT VOLT ECT ALPS4LAMP

541   4814V00228A         SHIELD,CASE INVERTER ET-C 32X203 400
                                                      REPLACEMENT PARTS LIST
For Capacitor & Resistors, the    CC, CX, CK, CN : Ceramic   RD : Carbon Film
charactors at 2nd and 3rd digit   CQ : Polyestor             RS : Metal Oxide Film
in the P/No. means as follows;    CE : Electrolytic          RN : Metal Film                                                         RUN DATE : 2002.7.2
                                                             RF : Fusible



LOCA. NO             PART NO                             DESCRIPTION                 LOCA. NO     PART NO                    DESCRIPTION

                                                                                     Q704       0TR388009BB    KTC3880-Y TP KEC SOT23 CHIP
                                            IC
                                                                                     Q705       0TR388009BB    KTC3880-Y TP KEC SOT23 CHIP
IC1              0IZZVC0042F          M37136EFSP 52P ST ML-012A
                                                                                     Q706       0TR388009BB    KTC3880-Y TP KEC SOT23 CHIP
IC2               0IAL241600B         AT24C16-10PC 8D EEPROM 16K
                                                                                     Q707       0TR388009BB    KTC3880-Y TP KEC SOT23 CHIP
IC3               0IFA752700A         KA75270Z 3 TP RE-SET IC MC-007
                                                                                     Q708       0TR388009BB    KTC3880-Y TP KEC SOT23 CHIP
IC4             0IMCRNS002A           LM1881M NATIONAL SEMICONDUCTOR
                                                                                     Q709       0TR388009BB    KTC3880-Y TP KEC SOT23 CHIP
IC201             0IAL242110A         AT24C21-10SI-2.5 8P,SOP TP 1K
                                                                                     Q711       0TR150400BA    CHIP 2SA1504S(ASY) KEC
IC202            0IPH740800M          74F08D 14P SOIC R/TP QUAD 2-IN
                                                                                     Q712       0TR387500AA    CHIP 2SC3875S(ALY) KEC
IC301             0IIT323000D         VPC3230D QA B4 80P QFP TRAY SO
                                                                                     Q713       0TR387500AA    CHIP 2SC3875S(ALY) KEC
IC302            0IHY100100A          LGTV1001 64P QFP BK PROGRESSIV
                                                                                     Q714       0TR387500AA    CHIP 2SC3875S(ALY) KEC
IC601           0IMCRMN014A           MSP3440G QA B8 V3 MICRONAS 80
                                                                                     Q715       0TR387500AA    CHIP 2SC3875S(ALY) KEC
IC602            0ISA428200A          LA4282 12S 2CHX10W AUDIO AMP
                                                                                     Q720       0TR102009AG    CHIP KRC102S SOT-23 TP KEC
IC603             0IKE704200J         KIA7042AF SOT-89 TP 4.2V VOLTA
                                                                                     Q721       0TR102009AG    CHIP KRC102S SOT-23 TP KEC
IC604            0IMCRFA009A          KA78M08RTM, FAIRCHILD 2P D-PAK
                                                                                     Q722       0TR102009AG    CHIP KRC102S SOT-23 TP KEC
IC605            0IMCRFA008A          KA78M05RTM, FAIRCHILD 2P D-PAK
                                                                                     Q723       0TR102009AG    CHIP KRC102S SOT-23 TP KEC
IC701            0ISG747410A          M74HC74M1R 14P,SOP TP DUAL DTY
                                                                                     Q725       0TR102009AG    CHIP KRC102S SOT-23 TP KEC
IC702            0ISG747410A          M74HC74M1R 14P,SOP TP DUAL DTY
                                                                                     Q726       0TR102009AG    CHIP KRC102S SOT-23 TP KEC
IC801            0ITC786000A          SI786 28SSOP TP DUAL-OUTPUT PO
                                                                                     Q727       0TR102009AG    CHIP KRC102S SOT-23 TP KEC
IC901            0IMCRG2004B          JAGASM A4 SAGE 352BA
                                                                                     Q728       0TR102009AG    CHIP KRC102S SOT-23 TP KEC
IC902            0IPH806520A          80C652 40 PLCC ST 8-BIT MICROC
                                                                                     Q801       0TR387500AA    CHIP 2SC3875S(ALY) KEC
IC903            0IPH743730E          74HCT373D 20SOP R/TP ADDRESS L
                                                                                     Q901       0TR387500AA    CHIP 2SC3875S(ALY) KEC
IC904            0IZZVC0041A          M27C512_10F1 DIP BK
                                                                                     Q903       0TR387500AA    CHIP 2SC3875S(ALY) KEC
IC905            0ISS416162C          K4S161622E-TC80 50TSOP R/TP SD
                                                                                     Q904       0TR387500AA    CHIP 2SC3875S(ALY) KEC
IC906            0ISS416162C          K4S161622E-TC80 50TSOP R/TP SD
IC907            0IPH740400G          74HC04D HEX INVERTER 14P,SOP T                                            DIODE
IC908             0IAL241610A         AT24C16N-10SI 8P SOIC ST EEPRO
                                                                                     D1         0DD181009AB    KDS181 TP KEC - 85V - - - 300M
IC909            0IMCRFA020A          RC1587DT_36 FAIRCHIL
                                                                                     D2         0DD181009AB    KDS181 TP KEC - 85V - - - 300M
IC914            0IMCRTH001A          THC63LVDM83R THINE E
                                                                                     D601       0DD181009AB    KDS181 TP KEC - 85V - - - 300M
                                  TRANSISTOR                                         D602       0DD181009AB    KDS181 TP KEC - 85V - - - 300M
                                                                                     D701       0DD181009AB    KDS181 TP KEC - 85V - - - 300M
IC802            0TFVI80001A          FETS,VISHAY SI4808DY R/TP SO-8 30V
                                                                                     D702       0DD181009AB    KDS181 TP KEC - 85V - - - 300M
IC803            0TFVI80001A          FETS,VISHAY SI4808DY R/TP SO-8 30V
                                                                                     D801       0DD181009AB    KDS181 TP KEC - 85V - - - 300M
IC804            0TFVI80005A          FETS,VISHAY SI4963DY R/TP SO-8 -20V
                                                                                     D802       0DD181009AB    KDS181 TP KEC - 85V - - - 300M
IC805            0TF492509AA          FET,SI4925DY TP TEMIC 30V 6.1A SO
                                                                                     D805       0DD181009AB    KDS181 TP KEC - 85V - - - 300M
IC913            0TF492509AA          FET,SI4925DY TP TEMIC 30V 6.1A SO
                                                                                     LD1        0DL112100AB    LED,SM3411(DL-11S2GN1) BK Y-GREEN
Q3               0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     ZD101      0DZ330009BA    ZENER,HZT33(TP) HITACHI
Q5               0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     ZD211      0DZRM00178A    ZENER,UDZS TE-17 5.1B ROHM R/TP SMD
Q102             0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     ZD700      0DZRM00178A    ZENER,UDZS TE-17 5.1B ROHM R/TP SMD
Q204             0TR387500AA          CHIP 2SC3875S(ALY) KEC
Q205             0TR387500AA          CHIP 2SC3875S(ALY) KEC                                                  CAPACITOR
Q206             0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     C17        0CE107SF6DC    100UF MVG 16V M
Q207             0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     C20        0CE107SF6DC    100UF MVG 16V M
Q208             0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     C21        0CE106SF6DC    10UF MVG 16V 20%
Q209             0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     C24        0CE107SF6DC    100UF MVG 16V M
Q210             0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     C25        0CE227VF6DC    220UF MV 16V 20%
Q301             0TR387500AA          CHIP 2SC3875S(ALY) KEC
                                                                                     C60        0CK224DF56A    220000PF 2012 16V 10%
Q605             0TR150400BA          CHIP 2SA1504S(ASY) KEC
                                                                                     C63        0CE476SF6DC    47UF MVG 16V M
Q702             0TR388009BB          KTC3880-Y TP KEC SOT23 CHIP
                                                                                     C69        0CE105VK6DC    1UF MV 50V 20%
Q703             0TR388009BB          KTC3880-Y TP KEC SOT23 CHIP
                                                                                     C101       0CE476DH618    47UF STD 25V 20%
                                                             For Capacitor & Resistors, the     CC, CX, CK, CN : Ceramic   RD : Carbon Film
                                                             charactors at 2nd and 3rd digit    CQ : Polyestor             RS : Metal Oxide Film
                                                             in the P/No. means as follows;     CE : Electrolytic          RN : Metal Film
                                                                                                                           RF : Fusible


LOCA. NO     PART NO                  DESCRIPTION   LOCA. NO          PART NO                                DESCRIPTION

C105       0CE106DK618   10UF STD 50V M             C653          0CE107DF618             100UF STD 16V M
C107       0CE108DD618   1000UF STD 10V M           C654          0CK224DF56A             220000PF 2012 16V 10%
C113       0CE105DK618   1UF STD 50V M              C655          0CK224DF56A             220000PF 2012 16V 10%
C115       0CE107DF618   100UF STD 16V M            C801          0CE476DK618             47UF STD 50V M
C209       0CE225VK6DC   2.2UF MV 50V 20%           C802          0CE477DF618             470UF STD 16V 20%
C214       0CE476SF6DC   47UF MVG 16V M             C803          0CE477DF618             470UF STD 16V 20%
C217       0CE106SF6DC   10UF MVG 16V 20%           C804          0CE477DF618             470UF STD 16V 20%
C220       0CE106SF6DC   10UF MVG 16V 20%           C805          0CE477DF618             470UF STD 16V 20%
C221       0CE106SF6DC   10UF MVG 16V 20%           C806          0CE477DF618             470UF STD 16V 20%
C302       0CE476SF6DC   47UF MVG 16V M             C807          0CE477DF618             470UF STD 16V 20%
C323       0CE106SF6DC   10UF MVG 16V 20%           C808          0CE227DH618             220UF STD 25V M
C331       0CK224DF56A   220000PF 2012 16V 10%      C814          0CE107DH618             100UF STD 25V M
C332       0C



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