Marantz PM7000N Service Manual page 45

6. No Audio Output during USB File Playback (USB-A input), File Playback on a Server or Internet Radio and Bluetooth Playback
Before testing circuit operation, check if the file to be played back is in a supported format and network settings are correct.
Check that the digital audio signal is output from HEOS MODULE during audio file and streaming play-
back.
DIGITAL PCB
[CN110 : 23Pin] AIOS4_PLD_NET_I2S2_LRCK
[CN110 : 24Pin] AIOS4_PLD_NET_I2S2_DATA
[CN110 : 25Pin] AIOS4_PLD_NET_I2S2_BCK
YES
Check that the digital audio signal is output from PLD [IC116].
DIGITAL PCB
[L111] PLD_DAC1_LRCK_DSDR
[L112] PLD_DAC1_SDATA/DSDL
[L113] PLD_DAC1_PBCK/DBCK
[L114] PLD_DAC1_MCK
YES
TO "5.2. I2C Communication Line Abnormalities"
NO
DIGITAL PCB
There is a problem with communication between HEOS MODULE [CN110] and MCU [IC104], or with
HEOS MODULE.
Check the communication waveform between HEOS MODULE and MCU. If no abnormality is found in
the communication waveform, replace HEOS MODULE.
NO
There is a problem with communication between PLD [IC116] and MCU [IC104], or with PLD [IC116,
IC115].
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