Service Manuals, User Guides, Schematic Diagrams or docs for : LG VCR bc300w circuit diagrams

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CIRCUIT DIAGRAMS                                                                                                                                                                                                                                                           * IC101 Voltage Sheet
                                                                                                                                                                                                                                                                             PB      16.1         4.0
                                                                                                                                                                                                                                                                                                                  * IC102 Voltage Sheet
                                                                                                                                                                                                                                                                                                                     PB    4.0    0.0

1. Power, Tuner, NICAM/A2 Circuit Diagram                                                                                                                                                                                                                                   REC      16.3
                                                                                                                                                                                                                                                                                     5
                                                                                                                                                                                                                                                                                                  4.6               REC 4.0
                                                                                                                                                                                                                                                                                                                            4
                                                                                                                                                                                                                                                                                                                                  0.0



                                                                                                                                                                                                                                                                                     IC101                                IC102
                              Switching dead.                                                     No 5.3VA and 5VG, 5VT.
                             IC101 is defective.                                                     D106 is defective.                                                                                                                                                            1                                        1
                                                                                                                                                                                                                                                                             PB   309       0.0    0.0               PB    4.9    3.9
                                   Power dead.                                                                                          D109, C120 are defective.                                                                                        No 12VA.
                                                                      No power.                                                                                                                                                                                             REC 309         0.0    0.0              REC 4.9       4.0
                             BD101, R101 are defective.                                                                                 No 14VA, 12VA are 12VT.                                                                                       Q155 is defective.
                                                                   D102 is defective.




    Power dead.                                                                                                                                                                                             No 5.2VT.
  F101 is defective.                                                                                                                                                                                     Q152 is defective.




                                                                                                                                                                                                                                           with MOD




                                                                                                                                                                                                                       2.8V
                                                                                                                                                                                                                2.0V

                                                                                                                                                                                                                       0V             0V
                                                                                                                                                                                                                              0.7V

                                                                                                                                                                                                                                     0V




                                                                                                                                       Power dead.
                                                                                                                                IC102, IC103 are defective.

                                                                                                                                                                                                                                                                            _ TR Voltage Sheet
                                                                                                                                                                                                                                                                                            Emitter        Collector         Base
                                                                                                                                                                                                                                                                                         PB       REC     PB      REC     PB      REC
                                                                                                                              OPTION : Hi-Fi MODEL ONLY
                                                                                                                                                                                                                                                                             Q151        11.9     11.8    14.8    15.0    12.5    12.4
                                                                                                                                                                                                                                                                             Q152        9.4       9.3    11.8    11.6    10.0    9.9
                                                                                                                                                                                                                                                                             Q153        11.8     11.7    14.8    15.0    12.4    12.3
                                                                                                                                                                                                                                                                             Q154        -27.3    -27.9   -27.3   -27.8   -26.6   -27.0
                                                                                                                                                                                                                                                                             Q155        5.3       5.3    5.2     5.3     0.0     0.0
                                                                                                                                                                                                                                                                             Q156        -16.1    -16.5   -16.0   -16.4   -15.4   -15.7
                                                                                                                                                                                                                                                                             Q157        5.3       5.3    5.2     5.2     0.0     0.0
                                                                                                                                                                                                                                                                             Q158        35.6     36.0    35.3    35.7    35.0    35.4
                                                                                                                                                                                                                                                                             Q159        5.3       5.3    5.2     5.2     4.5     4.5
                                                                                                                                                                                                                                                                             Q160        0.0       0.0    0.0     0.0     5.0     5.0
                                                                                                                                                                                                                                                                             Q161        0.0       0.0    0.1     0.0     5.0     5.0
                                                                                                                                                                                                                                                                             Q162        5.3       5.3    5.2     5.2     4.5     4.5
                                                                                                                                                                                                                                                                             Q164        5.3       5.3    5.3     5.3     4.6     4.6
                                                                                                                                                                                                                                                                             Q165        0.0       0.0    10.0    10.0    0.0     0.0

                 EE MODE(VIDEO)                                                                                                              NOTE :                                                                                                                         * IC103 Voltage Sheet
                 EE/PB MODE (VIDEO)          NOTES)   Symbol denotes AC ground.
                                                                                          NOTE)
                                                                                          NOTE)
                                                                                                   Warning
                                                                                                   Parts that are shaded are critical
                                                                                                                                              1. Shaded( ) parts are critical for safety. Replace only
                                                                                                                                                 with specified part number.                                                                                                                Emitter        Collector         Base
                                                                                          NOTE)    With respect to risk of fire or                                                                                                                                                       PB       REC     PB      REC     PB      REC
                 TU MODE (AUDIO)             NOTES)   Symbol denotes DC chassis ground.
                                                                                          NOTE)    electricial shock.
                                                                                                                                              2. Voltages are DC-measured with a digital voltmeter
                                                                                                                                                 during TUNER mode.                                                                                                          IC103       2.5       2.5    0.0     0.0     3.9     3.9




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