Denon AVR-X4400H Service Manual

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

Checking device. [IC202 : PCM9211]3-12. Error Code H1-12 failure detection procedureYESCheck item(42). Checking the reset :Check the CPU.Is the waveform of the TP near the DIR [IC202] correct (like the oneshown in the diagram) when the power is turned on?IC20234 pinChecking the reset waveform. (DIR)Recheck from check item (1).If it does not work, replace the PCB.Check the reset circuit between CPU [IC151] and DSP [IC202].If there is no problem, the DIR [IC202] is faulty.Replace with a new device.NOExamples of confirmation waveformVoltage scale : 1.0V/divTime scale : 20ms/divCheck item(43). Check the communication line :Check the CPU.Is the waveform of the TP near the DIR [IC202] correct (like the oneshown in the diagram) when the power is turned on?IC151DR_CK:CLKDR_DIN:MOSIDR_CE:CSDR_DOUT:MISOCheck item(44). Check the communication line :Check DIR [IC202], CPU[IC151] patterns as well as soldering.If there is no problem, go to the next step.Check the communication line. (DIR)DIR [IC202] is faulty.Replace with a new device.YES*The diagram shows an example.(Signal patterns vary depending on the tim-ing.)Points for checking waveforms- Crest value (3.3V normally)- Signal change- CLOCK frequency (about 2MHz)Voltage scale : 2.0V/divTime scale : 2us/divNOYESRecheck from check item (1).If it does not work, replace the PCB.121Caution inservicing Electrical Mechanical Repair Information Updating