Samsung HT-DB750 Service Manual

Also see for HT-DB1750: Instruction manual Instruction manual Instruction manual Manual Service manual

Contents

1-1Samsung Electronics1. Alignment and Adjustments1. TunerFM THD AdjustmentOutputOutput 28 dB(±2dB)60 dBMinumum Distortion (0.4% below)(Figure 1-1)SSG FREQ.Adjustmentpoint(FM DET)98 MHzFM DETECTOR COILFM Search Level AdjustmentAdjust SVR1 so that “TUNED” of FLT islighted (Figure 1-2)Figure1-2 FM Auto Search Level Adjustment*Adjust FM S.S.G level to 28dBFigure1-1 IF CENTER and THD AdjustmentSSG FREQ.Adjustmentpoint(SVR1)98 MHzBEACONSENSITIVITYSEMI-VR(20KΩ) FM S.S.G GND28 dBFM S.S.GOutputGNDSpeakerTerminalFMAntennaTerminalDistortion MeterInputSETInputoutputOscilloscopeFM INFM AntennaSET10 kΩOUTPUTAM SSG450KHZINPUTAM ANTINSpeaker Terminal60cmAM IFVTVM OscilloscopeAM(MW) I.F AdjustmentMaximum output (Figure 1-3)SSG FREQ.FrequencyAdjustmentpoint450 kHz522 kHzAM IFFigure1-3 AM I.F AdjustmentOUTPUT* Adjustment Location of Tuner PCBFig 1-4 OSC VoltageAM(MW) OSCAdjustmentOutput 1~7.0±0.5VReceived FREQ.Adjustmentpoint522~1611 KHzMOAM(MW) RFAdjustmentITEAM594 KHzMAMaximumOutput(Fig1-4)LW OSCAdjustment146~290 KHzLO2~7.0±0.5VLW RFAdjustment150 KHzLAMaximumOutput(Fig1-4)