Marantz HD-DAC1 Service Manual page 35

Is the Fuse opened?
MAIN POWER PART PCB(CUP12689-1)
･F902, F903, F904, F905
Is all AC voltage normal?
MAIN POWER PART PCB(CUP12689-1)
･CN93 pin1-2pin : around
･CN93 pin4-5pin : around
･CN93 pin6-7pin : around
Check control signal
MAIN POWER PART PCB(CUP12689-1)
･BN92 14pin(CTL_USB):+3.3V
Check DC voltage
SUB TRANS PCB (CUP12689-2)
･IC91 4pin : +3.3V
MAIN POWER PART PCB(CUP12689-1)
･IC92 4pin : +5V
･IC93 4pin : +5V
･IC94 2pin : +3.3V
･IC95 2pin : +3.3V
･IC96 2pin : +5V
･IC97 1pin : +5V
･Q905 Emitter : +39V
DIGITAL PCB (CUP12688)
･IC15 3pin : +1.8V
･IC16 3pin : +1.2V
･Q104 1pin : +3.3V
END
NO
7V (AC)
7V (AC)
36V (AC)
YES
YES
YES
Replace any fuse.
NO
Replace main transformer.
Check control signal
DIGITAL PCB (CUP12688)
NO
･IC11 4pin (CTL_USB) : +3.3V
･IC11 118pin (CTL_+3.3USBB): +3.3V
･IC11 119pin (CTL_+1.8V USBB): +3.3V
YES
Check Soldering IC11 or replace IC11.
Check Soldering all control line and CN11/BN92.
･DIGITAL PCB (CUP12688)
･MAIN POWER PART PCB(CUP12689-1)
NO
Check Soldering or replace each device
35
NO