Marantz HD-DAC1 - TROUBLESHOOTING: FLD Not Lighting

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2. FLD doesn't Light
Check DC voltage
FRONT PCB (CUP12687)
WF81 5pin : + 39V
Check DC voltage
FRONT PCB (CUP12687)
WF81 14pin : + 5V
Check DC voltage
FRONT PCB (CUP12687)
IC81 4pin : +4.2V
Check reset signal
FRONT PCB (CUP12687)
WF81 16pin(_RESET) : +3.3V
Check DC voltage
FRONT PCB (CUP12687)
WF81 2pin, 3pin : + 3.3V
Check DC voltage
MAIN POWER PART PCB(CUP12689-1)
BN92 10pin : +3.3V
Check Wire.
Check device
SUB TRANS PCB (CUP12689-2)
IC91 4pin : + 3.3V
Is DC voltage normal?
MAIN POWER PART PCB(CUP12689-1)
BN92 2
pin : +39V
Check Wire
.
Check Wire.
Replace
IC81.
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YESNO
YES
YES
Check device
MAIN POWER PART PCB(CUP12689-1)
Q905
Emitter : +39V
Check device
MAIN POWER PART PCB(CUP12689-1)
IC93 4pin : +5V
Check reset signal
DIGITAL PCB (CUP12688)
WF11 16pin (FPRS) : +3.3V
Check Soldering or replace
DIGITAL PCB
IC11
Check Soldering or replace
DIGITAL PCB
WF11 and FFC cable
Check DC voltage
MAIN POWER PART PCB(CUP12689-1)
BNC92 4pin : +5V
YES
NO
NO
NO
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