Denon AVR-X4400H Service Manual

Also see for AVR-X4400H: Manual Owner's manual

3-13. Error Code H1-16 failure detection procedureCheck the power supply voltage. (ARC IC)Check item(45). Check the power supply voltage. :Does the power supply voltage of the ARC IC [IC432] indicate the correct voltage (1.21V)?The test points are as follows.JK432HDMI OUT[MONITOR2]C4456Check item(46). Check the power supply voltage. :Check the power components [IC433] and the pattern on the sub-strate.If there is no problem, remove the ARC IC [IC432] from the substrateand measure the voltage at the test point of check item (45).Is the power supply voltage correct (1.2V)?Replace with a new device.The power supply circuit isfaulty.Replace the PCB.Recheck from check item (1).If it does not work, replace the PCB.Checking device. [IC432 : SiI9437]NOYESNOYESYESChecking the reset waveform. (ARC IC)Check item(47). Checking the reset waveform :Check the waveform.Is the "RESET" waveform of the ARC IC [IC432] correct (like theone shown in the diagram) when the power is turned on?U1007ARC_RSTCheck the reset circuit betweenCPU [IC151] and ARC IC [IC432].If there is no problem, the ARC IC[IC432] is faulty.Replace with a new device.NOExamples of confirmation waveformVoltage scale : 1.0V/divTime scale : 20ms/divARC IC [IC432] is faulty.Replace with a new device.Recheck from check item (1).If it does not work, replace the PCB.122Caution inservicing Electrical Mechanical Repair Information Updating