Denon AVR-S950H Series Service Manual

Also see for AVR-S950H Series: Owner's manual Owner's manual Quick start guide

Contents

Check item(3-4.1.). Check the power supply volt-age. :Does the power supply voltage of the GUI [U1026]indicate the appropriate voltage (1.8V, 3.3V)?The test points are as follows.U10261.8V3.3VC15743.3VCheck item(3-4.2.). Check the power supply volt-age. :Check the power supply components [U1069,U1077] on the substrate and peripheral pattern.If there is no problem, remove the GUI [U1026]from the substrate and measure the voltage atthe test point of check item (3-4.1.).Is the voltage correct (1.8V or 3.3V)?Check the power supply voltage.Checking device. [U1026 : ADV8003]Go to next page.3-4. Error Code H1-06 failure detection procedureNOGUI [U1026] is faulty.Replace with a new device.Recheck from check item (3.1.).If it does not work, replace the PCB.The power supply circuit is faulty.Replace the PCB.NOYESYESCheck item(3-4.3.). Checking the reset :Check the CPU.Is the waveform of the TP near the GUI [U1026] correct (like the oneshown in the diagram) when the power is turned on?U1026RESETChecking the reset waveform.10ms10ms 10msExample of the waveform to be checkedVoltage scale：1.0V/divTime scale：20ms/divRecheck from check item (3.1.).If it does not work, replace the PCB.Check the reset circuit between CPU [U1018] and GUI [U1026].If there is no problem, the GUI [U1026] is faulty.Replace with a new device.NOYESBefore ServicingThis Unit Electrical Mechanical Repair Information Updating98