Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD TV LW17E34C opr09AA6

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5 Troubleshooting
5-1 No Power

     Does proper DC 14 V appear at    No
                                           Check SMPS PCB and adapter.
      DC jack connected to CN12?



                     Yes


          Does proper DC 5 V          No
                                                   Check IC11.
        appear at Pin 2 of IC11?



                     Yes


          Does proper DC 14V          No
                                                   Check IC11.
        appear at Pin 1 of IC11?



                     Yes



     Does proper DC 3.3 V appear at   No
                                                   Check IC14.
             Pin 3 of IC14?



                     Yes


     Does proper DC 2.5 V appear at   No
                                              Check IC109 and IC17.
        Pin 4 of IC109 and IC17?



                     Yes


              Check IC23.




LW15E33C/LW17E34C                                                        5-1
5 Troubleshooting

5-2 No Video (PC Signal)

          Power indicator is green.

                       Yes

           Does the signal appear        No
           at IC134, IC135, IC136                         Check CN11.
               of R, G, B input?


                       Yes


            Does the clock pulse         No
                                              Check X21 and related circuit of X21.
              appear at X21?



                       Yes


        Does the clock pulse appear at
      output of 15"    No
                                                  Check related circuit of IC32.
             17"?


                       Yes



        Does the clock pulse appear at
                                         No       Replace 15"
         output of 15"
                                               17".
      17"?



                       Yes


             Replace LCD panel.




5-2                                                                                   LW15E33C/LW17E34C
                                                                                  5 Troubleshooting

5-3 No Picture (TV, Video, S-Video)

        Check Pin 55, 56 (S-Video)
       and Pin 52 (VCR) and Pin 74        No      Check CN41 (Tuner) and
          and Pin 53 (RF-CVBS)                     CN26 (VCR connector).
           of IC401 (VSP9407).


                     Yes


       Does the signal appear at          No       Check IC401 (VSP9407)
      RA33, RA34, RA311, RA312?                      and related circuit.


                     Yes


         Does signal appear at
       15"              No
 17"            Check IC32 and related circuit .
           of related IC32?


                     Yes


           Check IC61, 62 and
         15"
 17".




LW15E33C/LW17E34C                                                                              5-3
5 Troubleshooting

5-4 No Sound


           Does the signal appear at
        Pin 67 (Tuner sound signal) and      No           Check CN11 (PC conector)
      Pin 57, 56 (PC sound) and Pin 51, 50                and CN26 (VCR connector).
       (VCR sound) of IC53 (MSP3421G)?


                        Yes


       Does the signal appear at Pin 27,     No
                                                        Check IC32 and related circuit.
          28 of IC53 (MSP3421G)?



                        Yes



            Does the signal appear           No
                                                  Check IC55 (Audio amp) and related circuit.
                 at L53~L56?



                        Yes


             Replace the speaker.




5-4                                                                                             LW15E33C/LW17E34C

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