Sharp 64LHP5000 Service Manual

Contents

9864LHP5000PROJECTOR UNITË TLC2932IPW (SIGNAL ASSY: IC7703, IC7704)PLL IC» Pin Assignment1234567910111213148LOGIC VDDSELECTVCO OUTFIN -AFIN -BPFD OUTLOGIC GNDVCO VDDRBIASVCOINVCO GNDVCO INHIBITPFD INHIBITNCPFD VCO1/2 DIVIDER7 4 6 13 11LOGIC GNDFIN-APFD OUTVCO INRBIASVCO GND231410SELECTVCO OUTVCO VDDVCO INHIGIT951PFD INHIBITFIN-BLOGIC VDD12» Block DiagramPin No.1234567891011121314Pin NameLOGIC VDDSELECTVCO OUTF IN-AF IN-BPFD OUTLOGIC GNDNCPFD INHIBITVCO INHIBITVCO GNDV COINR BIASVCO VDDFunctionPin which supplies power voltage to the internal logic circuit. Should be completely separatedfrom the VCO power voltage supply pin.VCO output frequency 1/2 divider select pin. By controlling this pin using external logic, theVCO output frequency can be frequency divided by 1/2.VCO output pin. Set to level "L" when inhibited.2-input pin for detecting the edge difference between the reference frequency (REF-IN) andfrequency from the external counter. Normally, the 1REF-IN is input to pin FIN-A while thedivided frequency and doubled frequency from the external counter is input to pin FIN-B.2-input pin for detecting the edge difference between the reference frequency (REF-IN) andfrequency from the external counter. Normally, the 1REF-IN is input to pin FIN-A while thedivided frequency and doubled frequency from the external counter is input to pin FIN-B.PFD (phase frequency detector) output pin. Can be fixed at high impedance.Internal logic circuit ground pin.Internal unconnected pin.PFD inhibit function control pin.VCO inhibit function control pin.VCO ground pin.VCO control voltage input pin. Normally, PLL inputs the VCO oscillation control voltage fromthe LPF configured externally.Bias resistance connection pin for setting the VCO oscillation frequency. Connects the biasresistor between this pin and the power line when supplying bias for oscillation operations ofthe internal VCO and for setting and adjusting the oscillation frequency.VCO power voltage supply pin. This should be completely separated from the power voltagepin of internal logic.» Pin FunctionI/O—OOIIO——II—II—