HP LC3260N manual Picture APPEARS, but the Audio does not Appear

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TROUBLESHOOTING GUIDE

THE PICTURE APPEARS, BUT THE AUDIO DOES NOT APPEAR.

		IS CD301 AND CD303			NO
		CONNECTED ?
				YES
		IS THERE SIGNAL			YES
		CD301 AND CD303 ?
				NO
						YES
		IS	THERE SIGNAL			YES
		AT	PINS 11 AND 15
		OF	IC301 ?
				NO
				NO
		IS THERE SIGNAL				NO
		AT PINS 27 AND 28				NO
		AT PINS 27 AND 28
		OF IC904 ?
				YES

CHANGE AV PCB.

CONNECT CD301 AND CD303.

CHANGE SP301 AND SP302.

CHECK IC301 AND PERIPHERAL CIRCUIT.

CHECK IC904 AND PERIPHERAL CIRCUIT.

E-4

Image 21

Contents Model Servicing Notices on Checking HOW to Order PartsAbout Lead Free Solder PbF Contents System General SpecificationsA3-2 A3-3 A3-4 A3-5 Removal and Installation of Flat Package IC Disassembly InstructionsInstallation Set Set Key Remocon Standard Operations Condition Time Service Mode ListConfirmation of Initial Data When Replacing Eeprom Memory ICRE-WRITE for Digital Soft Firmware Adjustment Procedure Electrical AdjustmentsConfirmation of Fixed Value Step No Electrical Adjustment Parts Location Guide Wiring Connection Troubleshooting Guide Pins 1, 2, 3, 4 Picture does not Appear Is There Signal Picture APPEARS, but the Audio does not Appear CD3806 5V ? YES Is There Signal On Screen Display does Not Appear Digital RGB Interface Ddvs Converter AV SWITCH2/STEREO/SOUND AMP Block Diagram TUNER/DIGITAL/POWER Block Diagram Interface Block Diagram MICON2 Block Diagram CMF080A Printed Circuit Boards AV TOP SidePrinted Circuit Boards AV Bottom Side Printed Circuit Boards Scaler TOP Side Printed Circuit Boards Scaler Bottom Side Digital Bottom Side Printed Circuit Boards Digital TOP SideSolder Side CEF185A Printed Circuit Boards POWER/OPERATION Chip Mounted PartsAV SWITCH2 Schematic Diagram Level Shift AT+5V MuteSWYUV1/2 PSU5VD/DSR/LIGHTCTL PCBD20AV Jack Schematic Diagram Stereo Schematic Diagram Sound AMP/HEADPHONE AMP Schematic Diagram Power Schematic Diagram AV JACK2 Schematic Diagram Extmute SwspdifCoaxial Jack CON+5V Tuner Schematic Diagram Stereoreset HDMI/DVI COMPONENT/HDMI KEY-A KEY-B ScalerresetDVS 3DY/CRESET AFT1LOW 3DY/CRESET AFT2HIGH LcdonScaler Schematic Diagram ADC1 Schematic Diagram Lvds Schematic Diagram Jack Schematic Diagram AV SWITCH1 Schematic Diagram Regulator Schematic Diagram Interfacehdmi IC Schematic Diagram Hdmi MICON2 Schematic Diagram Asic Schematic Diagram Sdram Schematic Diagram NFIO7 NFIO6 NFIO5 NFIO4 NFIO3 NFIO2 NFIO1 NFIO0 To Asic Dtvreset From POWER2Nfcle FclkFront END Schematic Diagram DTV Reset DTV Power FROM/TO Firm UpdateAFT DTV Reset DTV ON-H Spdif Outa Tunersda AF3 TwiretxdcPOWER2 Schematic Diagram IC508 5VREGULATORPOWERFAIL LCD-H PowerswctlFROM/TO AC Inlet Chassis GNDOPERATION/REMOCON Schematic Diagram Power ON-H GND Power PCBDtunerresetl SwitchvideocWaveforms ADC1 AV OUT Mechanical Exploded View PCBDH0 Mechanical Replacement Parts List Electrical Replacement Parts List SPEC.NO