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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
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
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.
Check the S/PDIF signal.
MAIN PCB
DIR[
U502] : [R580]OPT OUT
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.
YES
YES
NO
NO
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
46