Service Manuals, User Guides, Schematic Diagrams or docs for : LG Audio FFH-818A f818adj

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                                       ADJUSTMENTS
This set has been aligned at the factory and normally will not require further adjustment. As a result, it is not
recommended that any attempt is made to modificate any circuit. If any parts are replaced or if anyone tampers
with the adjustment, realignment may be necessary.


IMPORTANT
1. Check Power-source voltage.
2. Set the function switch to band being aligned.
3. Turn volume control to minimum unless otherwise noted.
4. Connect low side of signal source and output indicator to chassis ground unless otherwise specified.
5. Keep the signal input as low as possible to avoid AGC and AC action.


TEST & ADJUSTMENT POINT




                                                                                            L203
                                                                                          (Rec Bias)
      L105                 L016                                                VR201
 (LW/SW USABLE        (DC VOLTAGE)                                       (Adjustment Point)
   SENSITIVITY)
                L017
             (MW USABLE
             SENSITIVITY)
                                       Figure 1. Main P.C. Board(FFH-717)



                                                      -8-
                                                                                                           L203
                                                                                        VR201              (Rec Bias)
               L105                                                               (Adjustment Point)
         (LW/SW USABLE            L016
           SENSITIVITY)      (DC VOLTAGE)
                        L017
             (MW USABLE SENSITIVITY)

                                     Figure 2. Main P.C. Board(FFH-818)



TAPE DECK ADJUSTMENT
1. AZIMUTH ADJUSTMENT
     Deck Mode                Test Tape                 Test Point              Adjustment             Adjust for
                                                                                DECK Screw
   A Deck Playback            MTT-114                  Speaker Out                                     Maximum
                                                                               Azimuth Screw
   B Deck Playback            MTT-114                  Speaker Out             Azimuth Screw           Maximum
                                                                  Electronic          Dual-trace
                                                                  Voltmeter           synchroscope

                     Head
                                 Playback Mode
                                                    Speaker Out
                                            L out
                       L ch                                                            CH1 CH2

           Test Tape                 Unit
           MTT-114     R ch                                                                    GND


                                            R out



                              Figure 3. Azimuth Adjustment Connection Diagram

                                                          -9-
2. MOTOR SPEED ADJUSTMENT

   Deck Mode              Test Tape           Test Point          Adjustment           Adjust for               Remark
   Normal Speed           MTT-111            Speaker Out                VR201          3kHz 

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