Service Manuals, User Guides, Schematic Diagrams or docs for : LG TV CT-29S30PT (mc99aa)072ats

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TROUBLESHOOTING GUIDE
37~39




        CPT PCB ASSY.
 NO PIP

In case of PIP(AV)                                                                   In case of PIP(RF)


                                  Is there video signal at        Is there CVBS signal at
           No                         pin29 of IC201?                  pin24 of ICP3?
                                                                                                      No
Check/Replace IC201.                          Yes
   Check I2C Bus.                                                              Yes            Check TUNER/IF
                                  Is there video signal at                                      parts of PIP.
          No                           pin26 of ICP3?
                                              Yes
Check P551A, PP2A.

                               Abnormal               Check pins1, 2, 3
                                                         of ICP3.
                  Check/Replace                               Normal
                   ICP3, ICP2.
                                                    Check pins8, 9, 10, 14        Abnormal
                                                          of ICP6.
                                                              Normal                    Check/Replace
                               Abnormal                                                  ICP5, ICP6.
                                                      Check pins45~48
                                                         of IC501.

                Check IC202, P552A.                           Normal

                                                       Check/Replace
                                                          IC501.

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