Denon DNP-800NE Service Manual page 46

6. Audio is not output from OPT OUT
Check input of digital audio waveform during playback of OPT
OUT.
MAIN PCB
DIR[U502] : [R553]BCK, [R555]LRCK, [R556]DATA
NO
There is a malfunction in the communication between the following areas or in PLD[U501].
PLD[U501] and MCU[U503]。
There is an abnormality in the communication. Replace PLD[U501] or MAIN PCB.
YES
Check the S/PDIF signal.
MAIN PCB
DIR[U502] : [R580]OPT OUT
YES
There is a malfunction in the communication between the following areas or in DIR[U502].
There is an abnormality in the communication. Replace DIR[U502] or MAIN PCB.
46
NO
Check the following areas to identify the area where the S/PDIF
signal is cut off.
Malfunctions in the OPT INPUT terminal,
power supply voltage [5V] of Output buffer IC[IC500], input/output